//! It also generates relevant memory-management functions and free-standing functions with
//! parameters mapped.
-use std::collections::{HashMap, hash_map};
+use std::collections::{HashMap, hash_map, HashSet};
use std::env;
use std::fs::File;
use std::io::{Read, Write};
+use std::iter::FromIterator;
use std::process;
use proc_macro2::Span;
const DEFAULT_IMPORTS: &'static str = "
use alloc::str::FromStr;
+use alloc::string::String;
use core::ffi::c_void;
use core::convert::Infallible;
use bitcoin::hashes::Hash;
use alloc::{vec::Vec, boxed::Box};
";
+
+/// str.rsplit_once but with an older MSRV
+fn rsplit_once<'a>(inp: &'a str, pattern: &str) -> Option<(&'a str, &'a str)> {
+ let mut iter = inp.rsplitn(2, pattern);
+ let second_entry = iter.next().unwrap();
+ Some((iter.next().unwrap(), second_entry))
+}
+
// *************************************
// *** Manually-expanded conversions ***
// *************************************
if let Some(t) = types.maybe_resolve_path(&trait_path, Some(generics)) {
let for_obj;
let full_obj_path;
+ let native_path;
let mut has_inner = false;
if let syn::Type::Path(ref p) = for_ty {
- if let Some(ident) = single_ident_generic_path_to_ident(&p.path) {
- for_obj = format!("{}", ident);
- full_obj_path = for_obj.clone();
- has_inner = types.c_type_has_inner_from_path(&types.resolve_path(&p.path, Some(generics)));
- } else { return; }
+ let resolved_path = types.resolve_path(&p.path, Some(generics));
+ for_obj = format!("{}", p.path.segments.last().unwrap().ident);
+ full_obj_path = format!("crate::{}", resolved_path);
+ has_inner = types.c_type_has_inner_from_path(&resolved_path);
+ let (path, name) = full_obj_path.rsplit_once("::").unwrap();
+ native_path = path.to_string() + "::native" + name;
} else {
// We assume that anything that isn't a Path is somehow a generic that ends up in our
// derived-types module.
let mut for_obj_vec = Vec::new();
types.write_c_type(&mut for_obj_vec, for_ty, Some(generics), false);
full_obj_path = String::from_utf8(for_obj_vec).unwrap();
- assert!(full_obj_path.starts_with(TypeResolver::generated_container_path()));
+ native_path = full_obj_path.clone();
+ if !full_obj_path.starts_with(TypeResolver::generated_container_path()) { return; }
for_obj = full_obj_path[TypeResolver::generated_container_path().len() + 2..].into();
}
writeln!(w, ")").unwrap();
writeln!(w, "}}").unwrap();
+
+ writeln!(w, "#[allow(unused)]").unwrap();
+ writeln!(w, "pub(crate) extern \"C\" fn {}_write_void(obj: *const c_void) -> crate::c_types::derived::CVec_u8Z {{", for_obj).unwrap();
if has_inner {
- writeln!(w, "#[no_mangle]").unwrap();
- writeln!(w, "pub(crate) extern \"C\" fn {}_write_void(obj: *const c_void) -> crate::c_types::derived::CVec_u8Z {{", for_obj).unwrap();
- writeln!(w, "\tcrate::c_types::serialize_obj(unsafe {{ &*(obj as *const native{}) }})", for_obj).unwrap();
- writeln!(w, "}}").unwrap();
+ writeln!(w, "\tcrate::c_types::serialize_obj(unsafe {{ &*(obj as *const {}) }})", native_path).unwrap();
+ } else {
+ writeln!(w, "\t{}_write(unsafe {{ &*(obj as *const {}) }})", for_obj, for_obj).unwrap();
}
+ writeln!(w, "}}").unwrap();
},
"lightning::util::ser::Readable"|"lightning::util::ser::ReadableArgs"|"lightning::util::ser::MaybeReadable" => {
// Create the Result<Object, DecodeError> syn::Type
- let mut res_ty: syn::Type = parse_quote!(Result<#for_ty, ::ln::msgs::DecodeError>);
+ let mut res_ty: syn::Type = parse_quote!(Result<#for_ty, lightning::ln::msgs::DecodeError>);
writeln!(w, "#[no_mangle]").unwrap();
writeln!(w, "/// Read a {} from a byte array, created by {}_write", for_obj, for_obj).unwrap();
let mut arg_conv = Vec::new();
if t == "lightning::util::ser::ReadableArgs" {
- write!(w, ", arg: ").unwrap();
assert!(trait_path.leading_colon.is_none());
let args_seg = trait_path.segments.iter().last().unwrap();
assert_eq!(format!("{}", args_seg.ident), "ReadableArgs");
if let syn::PathArguments::AngleBracketed(args) = &args_seg.arguments {
assert_eq!(args.args.len(), 1);
if let syn::GenericArgument::Type(args_ty) = args.args.iter().next().unwrap() {
- types.write_c_type(w, args_ty, Some(generics), false);
+ macro_rules! write_arg_conv {
+ ($ty: expr, $arg_name: expr) => {
+ write!(w, ", {}: ", $arg_name).unwrap();
+ types.write_c_type(w, $ty, Some(generics), false);
+
+ write!(&mut arg_conv, "\t").unwrap();
+ if types.write_from_c_conversion_new_var(&mut arg_conv, &format_ident!("{}", $arg_name), &$ty, Some(generics)) {
+ write!(&mut arg_conv, "\n\t").unwrap();
+ }
- assert!(!types.write_from_c_conversion_new_var(&mut arg_conv, &format_ident!("arg"), &args_ty, Some(generics)));
+ write!(&mut arg_conv, "let {}_conv = ", $arg_name).unwrap();
+ types.write_from_c_conversion_prefix(&mut arg_conv, &$ty, Some(generics));
+ write!(&mut arg_conv, "{}", $arg_name).unwrap();
+ types.write_from_c_conversion_suffix(&mut arg_conv, &$ty, Some(generics));
+ write!(&mut arg_conv, ";\n").unwrap();
+ }
+ }
- write!(&mut arg_conv, "\tlet arg_conv = ").unwrap();
- types.write_from_c_conversion_prefix(&mut arg_conv, &args_ty, Some(generics));
- write!(&mut arg_conv, "arg").unwrap();
- types.write_from_c_conversion_suffix(&mut arg_conv, &args_ty, Some(generics));
+ if let syn::Type::Tuple(tup) = args_ty {
+ // Crack open tuples and make them separate arguments instead of
+ // converting the full tuple. This makes it substantially easier to
+ // reason about things like references in the tuple fields.
+ let mut arg_conv_res = Vec::new();
+ for (idx, elem) in tup.elems.iter().enumerate() {
+ let arg_name = format!("arg_{}", ('a' as u8 + idx as u8) as char);
+ write_arg_conv!(elem, arg_name);
+ write!(&mut arg_conv_res, "{}_conv{}", arg_name, if idx != tup.elems.len() - 1 { ", " } else { "" }).unwrap();
+ }
+ writeln!(&mut arg_conv, "\tlet arg_conv = ({});", String::from_utf8(arg_conv_res).unwrap()).unwrap();
+ } else {
+ write_arg_conv!(args_ty, "arg");
+ }
} else { unreachable!(); }
} else { unreachable!(); }
} else if t == "lightning::util::ser::MaybeReadable" {
- res_ty = parse_quote!(Result<Option<#for_ty>, ::ln::msgs::DecodeError>);
+ res_ty = parse_quote!(Result<Option<#for_ty>, lightning::ln::msgs::DecodeError>);
}
write!(w, ") -> ").unwrap();
types.write_c_type(w, &res_ty, Some(generics), false);
if t == "lightning::util::ser::ReadableArgs" {
w.write(&arg_conv).unwrap();
- write!(w, ";\n").unwrap();
}
write!(w, "\tlet res: ").unwrap();
// At least in one case we need type annotations here, so provide them.
- types.write_rust_type(w, Some(generics), &res_ty);
+ types.write_rust_type(w, Some(generics), &res_ty, false);
if t == "lightning::util::ser::ReadableArgs" {
writeln!(w, " = crate::c_types::deserialize_obj_arg(ser, arg_conv);").unwrap();
writeln!(w, "\t\tlet vec = (self.write)(self.this_arg);").unwrap();
writeln!(w, "\t\tw.write_all(vec.as_slice())").unwrap();
writeln!(w, "\t}}\n}}").unwrap();
+ writeln!(w, "impl {} for {}Ref {{", trait_path, for_obj).unwrap();
+ writeln!(w, "\tfn write<W: lightning::util::ser::Writer>(&self, w: &mut W) -> Result<(), crate::c_types::io::Error> {{").unwrap();
+ writeln!(w, "\t\tlet vec = (self.0.write)(self.0.this_arg);").unwrap();
+ writeln!(w, "\t\tw.write_all(vec.as_slice())").unwrap();
+ writeln!(w, "\t}}\n}}").unwrap();
},
_ => panic!(),
}
let types_opt: Option<&TypeResolver> = $types;
if let Some(types) = types_opt {
if let Some(path) = types.maybe_resolve_path(&supertrait.path, None) {
- match (&path as &str, &supertrait.path.segments.iter().last().unwrap().ident) {
+ let last_seg = supertrait.path.segments.iter().last().unwrap();
+ match (&path as &str, &last_seg.ident, &last_seg.arguments) {
$( $($pat)|* => $e, )*
}
continue;
}
}
if let Some(ident) = supertrait.path.get_ident() {
- match (&format!("{}", ident) as &str, &ident) {
+ match (&format!("{}", ident) as &str, &ident, &syn::PathArguments::None) {
$( $($pat)|* => $e, )*
}
} else if types_opt.is_some() {
} } }
macro_rules! get_module_type_resolver {
- ($module: expr, $crate_libs: expr, $crate_types: expr) => { {
- let module: &str = &$module;
+ ($type_in_module: expr, $crate_types: expr) => { {
+ let module: &str = &$type_in_module;
let mut module_iter = module.rsplitn(2, "::");
module_iter.next().unwrap();
let module = module_iter.next().unwrap();
- let imports = ImportResolver::new(module.splitn(2, "::").next().unwrap(), &$crate_types.lib_ast.dependencies,
+ let imports = ImportResolver::new(module.splitn(2, "::").next().unwrap(), &$crate_types.lib_ast,
module, &$crate_types.lib_ast.modules.get(module).unwrap().items);
TypeResolver::new(module, imports, $crate_types)
} }
}
writeln_docs(w, &t.attrs, "");
- let mut gen_types = GenericTypes::new(None);
+ let mut gen_types = GenericTypes::new(Some(format!("{}::{}", types.module_path, trait_name)));
// Add functions which may be required for supertrait implementations.
// Due to borrow checker limitations, we only support one in-crate supertrait here.
let supertrait_name;
let supertrait_resolver;
walk_supertraits!(t, Some(&types), (
- (s, _i) => {
+ (s, _i, _) => {
if let Some(supertrait) = types.crate_types.traits.get(s) {
supertrait_name = s.to_string();
- supertrait_resolver = get_module_type_resolver!(supertrait_name, types.crate_libs, types.crate_types);
+ supertrait_resolver = get_module_type_resolver!(supertrait_name, types.crate_types);
gen_types.learn_associated_types(&supertrait, &supertrait_resolver);
break;
}
ExportStatus::TestOnly => continue,
ExportStatus::NotImplementable => panic!("(C-not implementable) must only appear on traits"),
}
- if m.default.is_some() { unimplemented!(); }
let mut meth_gen_types = gen_types.push_ctx();
assert!(meth_gen_types.learn_generics(&m.sig.generics, types));
// the Rust type and a flag to indicate whether deallocation needs to
// happen) as well as provide an Option<>al function pointer which is
// called when the trait method is called which allows updating on the fly.
- write!(w, "\tpub {}: ", m.sig.ident).unwrap();
- generated_fields.push((format!("{}", m.sig.ident), None, None));
+ write!(w, "\tpub {}: core::cell::UnsafeCell<", m.sig.ident).unwrap();
+ generated_fields.push((format!("{}", m.sig.ident), Some(("Clone::clone(unsafe { &*core::cell::UnsafeCell::get(".to_owned(), ")}).into()")), None));
types.write_c_type(w, &*r.elem, Some(&meth_gen_types), false);
- writeln!(w, ",").unwrap();
+ writeln!(w, ">,").unwrap();
writeln!(w, "\t/// Fill in the {} field as a reference to it will be given to Rust after this returns", m.sig.ident).unwrap();
writeln!(w, "\t/// Note that this takes a pointer to this object, not the this_ptr like other methods do").unwrap();
writeln!(w, "\t/// This function pointer may be NULL if {} is filled in when this object is created and never needs updating.", m.sig.ident).unwrap();
writeln!(extra_headers, "struct LDK{};", trait_name).unwrap();
continue;
}
- // Sadly, this currently doesn't do what we want, but it should be easy to get
- // cbindgen to support it. See https://github.com/eqrion/cbindgen/issues/531
- writeln!(w, "\t#[must_use]").unwrap();
}
let mut cpp_docs = Vec::new();
}
// Add functions which may be required for supertrait implementations.
walk_supertraits!(t, Some(&types), (
- ("Clone", _) => {
+ ("Clone", _, _) => {
writeln!(w, "\t/// Called, if set, after this {} has been cloned into a duplicate object.", trait_name).unwrap();
writeln!(w, "\t/// The new {} is provided, and should be mutated as needed to perform a", trait_name).unwrap();
writeln!(w, "\t/// deep copy of the object pointed to by this_arg or avoid any double-freeing.").unwrap();
writeln!(w, "\tpub cloned: Option<extern \"C\" fn (new_{}: &mut {})>,", trait_name, trait_name).unwrap();
generated_fields.push(("cloned".to_owned(), None, None));
},
- ("std::cmp::Eq", _)|("core::cmp::Eq", _) => {
+ ("std::cmp::Eq", _, _)|("core::cmp::Eq", _, _) => {
let eq_docs = "Checks if two objects are equal given this object's this_arg pointer and another object.";
writeln!(w, "\t/// {}", eq_docs).unwrap();
writeln!(w, "\tpub eq: extern \"C\" fn (this_arg: *const c_void, other_arg: &{}) -> bool,", trait_name).unwrap();
generated_fields.push(("eq".to_owned(), None, Some(format!("\t/** {} */\n", eq_docs))));
},
- ("std::hash::Hash", _)|("core::hash::Hash", _) => {
+ ("std::hash::Hash", _, _)|("core::hash::Hash", _, _) => {
let hash_docs_a = "Calculate a succinct non-cryptographic hash for an object given its this_arg pointer.";
let hash_docs_b = "This is used, for example, for inclusion of this object in a hash map.";
writeln!(w, "\t/// {}", hash_docs_a).unwrap();
generated_fields.push(("hash".to_owned(), None,
Some(format!("\t/**\n\t * {}\n\t * {}\n\t */\n", hash_docs_a, hash_docs_b))));
},
- ("Send", _) => {}, ("Sync", _) => {},
- ("std::fmt::Debug", _)|("core::fmt::Debug", _) => {
+ ("Send", _, _) => {}, ("Sync", _, _) => {},
+ ("std::fmt::Debug", _, _)|("core::fmt::Debug", _, _) => {
let debug_docs = "Return a human-readable \"debug\" string describing this object";
writeln!(w, "\t/// {}", debug_docs).unwrap();
writeln!(w, "\tpub debug_str: extern \"C\" fn (this_arg: *const c_void) -> crate::c_types::Str,").unwrap();
generated_fields.push(("debug_str".to_owned(), None,
Some(format!("\t/**\n\t * {}\n\t */\n", debug_docs))));
},
- (s, i) => {
+ (s, i, _) => {
// TODO: Both of the below should expose supertrait methods in C++, but doing so is
// nontrivial.
generated_fields.push(if types.crate_types.traits.get(s).is_none() {
let is_clonable = types.is_clonable(s);
writeln!(w, "\tpub {}: crate::{},", i, s).unwrap();
(format!("{}", i), if !is_clonable {
- Some(format!("crate::{}_clone_fields", s))
+ Some((format!("crate::{}_clone_fields(", s), ")"))
} else { None }, None)
});
}
writeln!(w, "}}").unwrap();
macro_rules! impl_trait_for_c {
- ($t: expr, $impl_accessor: expr, $type_resolver: expr) => {
+ ($t: expr, $impl_accessor: expr, $type_resolver: expr, $generic_impls: expr) => {
+ let mut trait_gen_types = gen_types.push_ctx();
+ assert!(trait_gen_types.learn_generics_with_impls(&$t.generics, $generic_impls, $type_resolver));
+
+ let mut ref_types = HashSet::new();
+ for item in $t.items.iter() {
+ if let syn::TraitItem::Type(ref t) = &item {
+ if t.default.is_some() || t.generics.lt_token.is_some() { panic!("10"); }
+ let mut bounds_iter = t.bounds.iter();
+ loop {
+ match bounds_iter.next().unwrap() {
+ syn::TypeParamBound::Trait(tr) => {
+ match $type_resolver.resolve_path(&tr.path, None).as_str() {
+ "core::ops::Deref"|"core::ops::DerefMut"|"std::ops::Deref"|"std::ops::DerefMut" => {
+ // Handle cases like
+ // trait A {
+ // type B;
+ // type C: Deref<Target = Self::B>;
+ // }
+ // by tracking if we have any B's here and making them
+ // the *Ref types below.
+ if let syn::PathArguments::AngleBracketed(args) = &tr.path.segments.iter().last().unwrap().arguments {
+ if let syn::GenericArgument::Binding(bind) = args.args.iter().last().unwrap() {
+ assert_eq!(format!("{}", bind.ident), "Target");
+ if let syn::Type::Path(p) = &bind.ty {
+ assert!(p.qself.is_none());
+ let mut segs = p.path.segments.iter();
+ assert_eq!(format!("{}", segs.next().unwrap().ident), "Self");
+ ref_types.insert(format!("{}", segs.next().unwrap().ident));
+ assert!(segs.next().is_none());
+ } else { panic!(); }
+ }
+ }
+ },
+ _ => {},
+ }
+ break;
+ }
+ syn::TypeParamBound::Lifetime(_) => {},
+ }
+ }
+ }
+ }
+
for item in $t.items.iter() {
match item {
syn::TraitItem::Method(m) => {
if let ExportStatus::TestOnly = export_status(&m.attrs) { continue; }
- if m.default.is_some() { unimplemented!(); }
if m.sig.constness.is_some() || m.sig.asyncness.is_some() || m.sig.unsafety.is_some() ||
m.sig.abi.is_some() || m.sig.variadic.is_some() {
- unimplemented!();
+ panic!("1");
}
- let mut meth_gen_types = gen_types.push_ctx();
+ let mut meth_gen_types = trait_gen_types.push_ctx();
assert!(meth_gen_types.learn_generics(&m.sig.generics, $type_resolver));
// Note that we do *not* use the method generics when printing "native"
// rust parts - if the method is generic, we need to print a generic
for inp in m.sig.inputs.iter() {
match inp {
syn::FnArg::Receiver(recv) => {
- if !recv.attrs.is_empty() || recv.reference.is_none() { unimplemented!(); }
+ if !recv.attrs.is_empty() || recv.reference.is_none() { panic!("2"); }
write!(w, "&").unwrap();
if let Some(lft) = &recv.reference.as_ref().unwrap().1 {
write!(w, "'{} ", lft.ident).unwrap();
}
},
syn::FnArg::Typed(arg) => {
- if !arg.attrs.is_empty() { unimplemented!(); }
+ if !arg.attrs.is_empty() { panic!("3"); }
match &*arg.pat {
syn::Pat::Ident(ident) => {
if !ident.attrs.is_empty() || ident.by_ref.is_some() ||
ident.mutability.is_some() || ident.subpat.is_some() {
- unimplemented!();
+ panic!("4");
}
write!(w, ", mut {}{}: ", if $type_resolver.skip_arg(&*arg.ty, Some(&meth_gen_types)) { "_" } else { "" }, ident.ident).unwrap();
}
- _ => unimplemented!(),
+ _ => panic!("5"),
}
- $type_resolver.write_rust_type(w, Some(&gen_types), &*arg.ty);
+ $type_resolver.write_rust_type(w, Some(&gen_types), &*arg.ty, false);
}
}
}
match &m.sig.output {
syn::ReturnType::Type(_, rtype) => {
write!(w, " -> ").unwrap();
- $type_resolver.write_rust_type(w, Some(&gen_types), &*rtype)
+ $type_resolver.write_rust_type(w, Some(&gen_types), &*rtype, false)
},
_ => {},
}
write!(w, " {{\n\t\t").unwrap();
match export_status(&m.attrs) {
ExportStatus::NoExport => {
- unimplemented!();
+ panic!("6");
},
_ => {},
}
writeln!(w, "\t\t\t(f)(&self{});", $impl_accessor).unwrap();
write!(w, "\t\t}}\n\t\t").unwrap();
$type_resolver.write_from_c_conversion_to_ref_prefix(w, &*r.elem, Some(&meth_gen_types));
- write!(w, "self{}.{}", $impl_accessor, m.sig.ident).unwrap();
+ write!(w, "unsafe {{ &*self{}.{}.get() }}", $impl_accessor, m.sig.ident).unwrap();
$type_resolver.write_from_c_conversion_to_ref_suffix(w, &*r.elem, Some(&meth_gen_types));
writeln!(w, "\n\t}}").unwrap();
continue;
writeln!(w, "\n\t}}").unwrap();
},
&syn::TraitItem::Type(ref t) => {
- if t.default.is_some() || t.generics.lt_token.is_some() { unimplemented!(); }
+ if t.default.is_some() || t.generics.lt_token.is_some() { panic!("10"); }
let mut bounds_iter = t.bounds.iter();
loop {
match bounds_iter.next().unwrap() {
syn::TypeParamBound::Trait(tr) => {
- writeln!(w, "\ttype {} = crate::{};", t.ident, $type_resolver.resolve_path(&tr.path, Some(&gen_types))).unwrap();
+ write!(w, "\ttype {} = crate::{}", t.ident, $type_resolver.resolve_path(&tr.path, Some(&gen_types))).unwrap();
+ if ref_types.contains(&format!("{}", t.ident)) {
+ write!(w, "Ref").unwrap();
+ }
+ writeln!(w, ";").unwrap();
for bound in bounds_iter {
- if let syn::TypeParamBound::Trait(_) = bound { unimplemented!(); }
+ if let syn::TypeParamBound::Trait(t) = bound {
+ // We only allow for `Sized` here.
+ assert_eq!(t.path.segments.len(), 1);
+ assert_eq!(format!("{}", t.path.segments[0].ident), "Sized");
+ }
}
break;
},
}
}
},
- _ => unimplemented!(),
+ _ => panic!("12"),
}
}
}
writeln!(w, "unsafe impl Send for {} {{}}", trait_name).unwrap();
writeln!(w, "unsafe impl Sync for {} {{}}", trait_name).unwrap();
- writeln!(w, "#[no_mangle]").unwrap();
- writeln!(w, "pub(crate) extern \"C\" fn {}_clone_fields(orig: &{}) -> {} {{", trait_name, trait_name, trait_name).unwrap();
+ writeln!(w, "#[allow(unused)]").unwrap();
+ writeln!(w, "pub(crate) fn {}_clone_fields(orig: &{}) -> {} {{", trait_name, trait_name, trait_name).unwrap();
writeln!(w, "\t{} {{", trait_name).unwrap();
writeln!(w, "\t\tthis_arg: orig.this_arg,").unwrap();
for (field, clone_fn, _) in generated_fields.iter() {
- if let Some(f) = clone_fn {
+ if let Some((pfx, sfx)) = clone_fn {
// If the field isn't clonable, blindly assume its a trait and hope for the best.
- writeln!(w, "\t\t{}: {}(&orig.{}),", field, f, field).unwrap();
+ writeln!(w, "\t\t{}: {}&orig.{}{},", field, pfx, field, sfx).unwrap();
} else {
writeln!(w, "\t\t{}: Clone::clone(&orig.{}),", field, field).unwrap();
}
// Implement supertraits for the C-mapped struct.
walk_supertraits!(t, Some(&types), (
- ("std::cmp::Eq", _)|("core::cmp::Eq", _) => {
+ ("std::cmp::Eq", _, _)|("core::cmp::Eq", _, _) => {
writeln!(w, "impl core::cmp::Eq for {} {{}}", trait_name).unwrap();
writeln!(w, "impl core::cmp::PartialEq for {} {{", trait_name).unwrap();
writeln!(w, "\tfn eq(&self, o: &Self) -> bool {{ (self.eq)(self.this_arg, o) }}\n}}").unwrap();
+ writeln!(w, "impl core::cmp::Eq for {}Ref {{}}", trait_name).unwrap();
+ writeln!(w, "impl core::cmp::PartialEq for {}Ref {{", trait_name).unwrap();
+ writeln!(w, "\tfn eq(&self, o: &Self) -> bool {{ (self.0.eq)(self.0.this_arg, &o.0) }}\n}}").unwrap();
},
- ("std::hash::Hash", _)|("core::hash::Hash", _) => {
+ ("std::hash::Hash", _, _)|("core::hash::Hash", _, _) => {
writeln!(w, "impl core::hash::Hash for {} {{", trait_name).unwrap();
writeln!(w, "\tfn hash<H: core::hash::Hasher>(&self, hasher: &mut H) {{ hasher.write_u64((self.hash)(self.this_arg)) }}\n}}").unwrap();
+ writeln!(w, "impl core::hash::Hash for {}Ref {{", trait_name).unwrap();
+ writeln!(w, "\tfn hash<H: core::hash::Hasher>(&self, hasher: &mut H) {{ hasher.write_u64((self.0.hash)(self.0.this_arg)) }}\n}}").unwrap();
},
- ("Send", _) => {}, ("Sync", _) => {},
- ("Clone", _) => {
+ ("Send", _, _) => {}, ("Sync", _, _) => {},
+ ("Clone", _, _) => {
writeln!(w, "#[no_mangle]").unwrap();
writeln!(w, "/// Creates a copy of a {}", trait_name).unwrap();
writeln!(w, "pub extern \"C\" fn {}_clone(orig: &{}) -> {} {{", trait_name, trait_name, trait_name).unwrap();
writeln!(w, "\tfn clone(&self) -> Self {{").unwrap();
writeln!(w, "\t\t{}_clone(self)", trait_name).unwrap();
writeln!(w, "\t}}\n}}").unwrap();
+ writeln!(w, "impl Clone for {}Ref {{", trait_name).unwrap();
+ writeln!(w, "\tfn clone(&self) -> Self {{").unwrap();
+ writeln!(w, "\t\tSelf({}_clone(&self.0))", trait_name).unwrap();
+ writeln!(w, "\t}}\n}}").unwrap();
},
- ("std::fmt::Debug", _)|("core::fmt::Debug", _) => {
+ ("std::fmt::Debug", _, _)|("core::fmt::Debug", _, _) => {
writeln!(w, "impl core::fmt::Debug for {} {{", trait_name).unwrap();
writeln!(w, "\tfn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {{").unwrap();
writeln!(w, "\t\tf.write_str((self.debug_str)(self.this_arg).into_str())").unwrap();
writeln!(w, "\t}}").unwrap();
writeln!(w, "}}").unwrap();
+ writeln!(w, "impl core::fmt::Debug for {}Ref {{", trait_name).unwrap();
+ writeln!(w, "\tfn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {{").unwrap();
+ writeln!(w, "\t\tf.write_str((self.0.debug_str)(self.0.this_arg).into_str())").unwrap();
+ writeln!(w, "\t}}").unwrap();
+ writeln!(w, "}}").unwrap();
},
- (s, i) => {
+ (s, i, generic_args) => {
if let Some(supertrait) = types.crate_types.traits.get(s) {
- let resolver = get_module_type_resolver!(s, types.crate_libs, types.crate_types);
- writeln!(w, "impl {} for {} {{", s, trait_name).unwrap();
- impl_trait_for_c!(supertrait, format!(".{}", i), &resolver);
- writeln!(w, "}}").unwrap();
+ let resolver = get_module_type_resolver!(s, types.crate_types);
+ macro_rules! impl_supertrait {
+ ($s: expr, $supertrait: expr, $i: expr, $generic_args: expr) => {
+ let resolver = get_module_type_resolver!($s, types.crate_types);
+
+ // Blindly assume that the same imports where `supertrait` is defined are also
+ // imported here. This will almost certainly break at some point, but it should be
+ // a compilation failure when it does so.
+ write!(w, "impl").unwrap();
+ maybe_write_lifetime_generics(w, &$supertrait.generics, types);
+ write!(w, " {}", $s).unwrap();
+ maybe_write_generics(w, &$supertrait.generics, $generic_args, types, false);
+ writeln!(w, " for {} {{", trait_name).unwrap();
+ impl_trait_for_c!($supertrait, format!(".{}", $i), &resolver, $generic_args);
+ writeln!(w, "}}").unwrap();
+
+ write!(w, "impl").unwrap();
+ maybe_write_lifetime_generics(w, &$supertrait.generics, types);
+ write!(w, " {}", $s).unwrap();
+ maybe_write_generics(w, &$supertrait.generics, $generic_args, types, false);
+ writeln!(w, " for {}Ref {{", trait_name).unwrap();
+ impl_trait_for_c!($supertrait, format!(".0.{}", $i), &resolver, $generic_args);
+ writeln!(w, "}}").unwrap();
+ }
+ }
+ impl_supertrait!(s, supertrait, i, generic_args);
+ walk_supertraits!(supertrait, Some(&resolver), (
+ (s, supertrait_i, generic_args) => {
+ if let Some(supertrait) = types.crate_types.traits.get(s) {
+ impl_supertrait!(s, supertrait, format!("{}.{}", i, supertrait_i), generic_args);
+ }
+ }
+ ) );
} else {
do_write_impl_trait(w, s, i, &trait_name);
}
write!(w, "impl").unwrap();
maybe_write_lifetime_generics(w, &t.generics, types);
write!(w, " rust{}", t.ident).unwrap();
- maybe_write_generics(w, &t.generics, types, false);
+ maybe_write_generics(w, &t.generics, &syn::PathArguments::None, types, false);
writeln!(w, " for {} {{", trait_name).unwrap();
- impl_trait_for_c!(t, "", types);
+ impl_trait_for_c!(t, "", types, &syn::PathArguments::None);
writeln!(w, "}}\n").unwrap();
+
+ writeln!(w, "pub struct {}Ref({});", trait_name, trait_name).unwrap();
+ write!(w, "impl").unwrap();
+ maybe_write_lifetime_generics(w, &t.generics, types);
+ write!(w, " rust{}", t.ident).unwrap();
+ maybe_write_generics(w, &t.generics, &syn::PathArguments::None, types, false);
+ writeln!(w, " for {}Ref {{", trait_name).unwrap();
+ impl_trait_for_c!(t, ".0", types, &syn::PathArguments::None);
+ writeln!(w, "}}\n").unwrap();
+
writeln!(w, "// We're essentially a pointer already, or at least a set of pointers, so allow us to be used").unwrap();
writeln!(w, "// directly as a Deref trait in higher-level structs:").unwrap();
- writeln!(w, "impl core::ops::Deref for {} {{\n\ttype Target = Self;", trait_name).unwrap();
- writeln!(w, "\tfn deref(&self) -> &Self {{\n\t\tself\n\t}}\n}}").unwrap();
+ writeln!(w, "impl core::ops::Deref for {} {{\n\ttype Target = {}Ref;", trait_name, trait_name).unwrap();
+ writeln!(w, "\tfn deref(&self) -> &Self::Target {{\n\t\tunsafe {{ &*(self as *const _ as *const {}Ref) }}\n\t}}\n}}", trait_name).unwrap();
+ writeln!(w, "impl core::ops::DerefMut for {} {{", trait_name).unwrap();
+ writeln!(w, "\tfn deref_mut(&mut self) -> &mut {}Ref {{\n\t\tunsafe {{ &mut *(self as *mut _ as *mut {}Ref) }}\n\t}}\n}}", trait_name, trait_name).unwrap();
}
writeln!(w, "/// Calls the free function if one is set").unwrap();
// https://github.com/eqrion/cbindgen/issues/286 Thus, instead, we import it as a temporary
// name and then reference it by that name, which works around the issue.
write!(w, "\nuse {}::{} as native{}Import;\npub(crate) type native{} = native{}Import", types.module_path, ident, ident, ident, ident).unwrap();
- maybe_write_generics(w, &generics, &types, true);
+ maybe_write_generics(w, &generics, &syn::PathArguments::None, &types, true);
writeln!(w, ";\n").unwrap();
writeln!(extra_headers, "struct native{}Opaque;\ntypedef struct native{}Opaque LDKnative{};", ident, ident, ident).unwrap();
writeln_docs(w, &attrs, "");
writeln!(w, "\t/// this to be true and invalidate the object pointed to by inner.").unwrap();
writeln!(w, "\tpub is_owned: bool,").unwrap();
writeln!(w, "}}\n").unwrap();
+
+ writeln!(w, "impl core::ops::Deref for {} {{", struct_name).unwrap();
+ writeln!(w, "\ttype Target = native{};", struct_name).unwrap();
+ writeln!(w, "\tfn deref(&self) -> &Self::Target {{ unsafe {{ &*ObjOps::untweak_ptr(self.inner) }} }}").unwrap();
+ writeln!(w, "}}").unwrap();
+
+ writeln!(w, "unsafe impl core::marker::Send for {} {{ }}", struct_name).unwrap();
+ writeln!(w, "unsafe impl core::marker::Sync for {} {{ }}", struct_name).unwrap();
+
writeln!(w, "impl Drop for {} {{\n\tfn drop(&mut self) {{", struct_name).unwrap();
writeln!(w, "\t\tif self.is_owned && !<*mut native{}>::is_null(self.inner) {{", ident).unwrap();
writeln!(w, "\t\t\tlet _ = unsafe {{ Box::from_raw(ObjOps::untweak_ptr(self.inner)) }};\n\t\t}}\n\t}}\n}}").unwrap();
+
writeln!(w, "/// Frees any resources used by the {}, if is_owned is set and inner is non-NULL.", struct_name).unwrap();
writeln!(w, "#[no_mangle]\npub extern \"C\" fn {}_free(this_obj: {}) {{ }}", struct_name, struct_name).unwrap();
writeln!(w, "#[allow(unused)]").unwrap();
writeln!(w, "/// Used only if an object of this type is returned as a trait impl by a method").unwrap();
writeln!(w, "pub(crate) extern \"C\" fn {}_free_void(this_ptr: *mut c_void) {{", struct_name).unwrap();
- writeln!(w, "\tunsafe {{ let _ = Box::from_raw(this_ptr as *mut native{}); }}\n}}", struct_name).unwrap();
+ writeln!(w, "\tlet _ = unsafe {{ Box::from_raw(this_ptr as *mut native{}) }};\n}}", struct_name).unwrap();
+
writeln!(w, "#[allow(unused)]").unwrap();
writeln!(w, "impl {} {{", struct_name).unwrap();
writeln!(w, "\tpub(crate) fn get_native_ref(&self) -> &'static native{} {{", struct_name).unwrap();
writeln!(w, "\t\tlet ret = ObjOps::untweak_ptr(self.inner);").unwrap();
writeln!(w, "\t\tself.inner = core::ptr::null_mut();").unwrap();
writeln!(w, "\t\tret").unwrap();
+ writeln!(w, "\t}}").unwrap();
+ writeln!(w, "\tpub(crate) fn as_ref_to(&self) -> Self {{").unwrap();
+ writeln!(w, "\t\tSelf {{ inner: self.inner, is_owned: false }}").unwrap();
writeln!(w, "\t}}\n}}").unwrap();
write_cpp_wrapper(cpp_headers, &format!("{}", ident), true, None);
write!(w, "inner_val").unwrap();
types.write_to_c_conversion_inline_suffix(w, &ref_type, Some(&gen_types), true);
writeln!(w, "\n}}").unwrap();
+ } else {
+ // If the type isn't reference-able, but is clonable, export a getter that just clones
+ if types.understood_c_type(&$field.ty, Some(&gen_types)) {
+ let mut v = Vec::new();
+ types.write_c_type(&mut v, &$field.ty, Some(&gen_types), true);
+ let s = String::from_utf8(v).unwrap();
+ if types.is_clonable(&s) {
+ writeln_arg_docs(w, &$field.attrs, "", types, Some(&gen_types), vec![].drain(..), Some(&$field.ty));
+ writeln!(w, "///\n/// Returns a copy of the field.").unwrap();
+ write!(w, "#[no_mangle]\npub extern \"C\" fn {}_get_{}(this_ptr: &{}) -> {}", struct_name, $new_name, struct_name, s).unwrap();
+ write!(w, " {{\n\tlet mut inner_val = this_ptr.get_native_mut_ref().{}.clone();\n\t", $real_name).unwrap();
+ let local_var = types.write_to_c_conversion_new_var(w, &format_ident!("inner_val"), &$field.ty, Some(&gen_types), true);
+ if local_var { write!(w, "\n\t").unwrap(); }
+ types.write_to_c_conversion_inline_prefix(w, &$field.ty, Some(&gen_types), true);
+ write!(w, "inner_val").unwrap();
+ types.write_to_c_conversion_inline_suffix(w, &$field.ty, Some(&gen_types), true);
+ writeln!(w, "\n}}").unwrap();
+ }
+ }
}
}
define_field!(('a' as u8 + idx as u8) as char, ('0' as u8 + idx as u8) as char, field);
}
}
- _ => unimplemented!()
+ syn::Fields::Unit => {},
}
if all_fields_settable {
// Build a constructor!
writeln!(w, "/// Constructs a new {} given each field", struct_name).unwrap();
+ match &s.fields {
+ syn::Fields::Named(fields) => {
+ writeln_arg_docs(w, &[], "", types, Some(&gen_types),
+ fields.named.iter().map(|field| (format!("{}_arg", field.ident.as_ref().unwrap()), &field.ty)),
+ None);
+ },
+ syn::Fields::Unnamed(fields) => {
+ writeln_arg_docs(w, &[], "", types, Some(&gen_types),
+ fields.unnamed.iter().enumerate().map(|(idx, field)| (format!("{}_arg", ('a' as u8 + idx as u8)), &field.ty)),
+ None);
+ },
+ syn::Fields::Unit => {},
+ }
write!(w, "#[must_use]\n#[no_mangle]\npub extern \"C\" fn {}_new(", struct_name).unwrap();
match &s.fields {
types.write_c_type(w, &field.ty, Some(&gen_types), false);
}
}
- _ => unreachable!()
+ syn::Fields::Unit => {},
}
write!(w, ") -> {} {{\n\t", struct_name).unwrap();
match &s.fields {
}
}
},
- _ => unreachable!()
+ syn::Fields::Unit => {},
}
write!(w, "{} {{ inner: ObjOps::heap_alloc(", struct_name).unwrap();
match &s.fields {
write!(w, "\t}}").unwrap();
},
syn::Fields::Unnamed(fields) => {
- assert!(s.generics.lt_token.is_none());
+ assert!(!s.generics.params.iter()
+ .any(|gen| if let syn::GenericParam::Lifetime(_) = gen { false } else { true }));
writeln!(w, "{} (", types.maybe_resolve_ident(&s.ident).unwrap()).unwrap();
for (idx, field) in fields.unnamed.iter().enumerate() {
write!(w, "\t\t").unwrap();
}
write!(w, "\t)").unwrap();
},
- _ => unreachable!()
+ syn::Fields::Unit => write!(w, "{}::{} {{}}", types.module_path, struct_name).unwrap(),
}
writeln!(w, "), is_owned: true }}\n}}").unwrap();
}
/// Trait struct containing a pointer to the passed struct's inner field and the wrapper functions.
///
/// A few non-crate Traits are hard-coded including Default.
-fn writeln_impl<W: std::io::Write>(w: &mut W, i: &syn::ItemImpl, types: &mut TypeResolver) {
+fn writeln_impl<W: std::io::Write>(w: &mut W, w_uses: &mut HashSet<String, NonRandomHash>, i: &syn::ItemImpl, types: &mut TypeResolver) {
match export_status(&i.attrs) {
ExportStatus::Export => {},
ExportStatus::NoExport|ExportStatus::TestOnly => return,
}
if let &syn::Type::Path(ref p) = &*i.self_ty {
if p.qself.is_some() { unimplemented!(); }
- if let Some(ident) = single_ident_generic_path_to_ident(&p.path) {
- if let Some(resolved_path) = types.maybe_resolve_non_ignored_ident(&ident) {
+ let ident = &p.path.segments.last().unwrap().ident;
+ if let Some(resolved_path) = types.maybe_resolve_path(&p.path, None) {
+ if types.crate_types.opaques.contains_key(&resolved_path) || types.crate_types.mirrored_enums.contains_key(&resolved_path) ||
+ // At least for core::infallible::Infallible we need to support mapping an
+ // out-of-crate trait implementation.
+ (types.understood_c_path(&p.path) && first_seg_is_stdlib(resolved_path.split("::").next().unwrap())) {
if !types.understood_c_path(&p.path) {
eprintln!("Not implementing anything for impl {} as the type is not understood (probably C-not exported)", ident);
return;
if i.defaultness.is_some() || i.unsafety.is_some() { unimplemented!(); }
if let Some(trait_path) = i.trait_.as_ref() {
if trait_path.0.is_some() { unimplemented!(); }
- if types.understood_c_path(&trait_path.1) {
- let full_trait_path = types.resolve_path(&trait_path.1, None);
- let trait_obj = *types.crate_types.traits.get(&full_trait_path).unwrap();
+ let full_trait_path_opt = types.maybe_resolve_path(&trait_path.1, None);
+ let trait_obj_opt = full_trait_path_opt.as_ref().and_then(|path| types.crate_types.traits.get(path));
+ if types.understood_c_path(&trait_path.1) && trait_obj_opt.is_some() {
+ let full_trait_path = full_trait_path_opt.unwrap();
+ let trait_obj = *trait_obj_opt.unwrap();
let supertrait_name;
let supertrait_resolver;
walk_supertraits!(trait_obj, Some(&types), (
- (s, _i) => {
+ (s, _i, _) => {
if let Some(supertrait) = types.crate_types.traits.get(s) {
supertrait_name = s.to_string();
- supertrait_resolver = get_module_type_resolver!(supertrait_name, types.crate_libs, types.crate_types);
+ supertrait_resolver = get_module_type_resolver!(supertrait_name, types.crate_types);
gen_types.learn_associated_types(&supertrait, &supertrait_resolver);
break;
}
// mappings from a trai defined in a different file, we may mis-resolve or
// fail to resolve the mapped types. Thus, we have to construct a new
// resolver for the module that the trait was defined in here first.
- let trait_resolver = get_module_type_resolver!(full_trait_path, types.crate_libs, types.crate_types);
+ let mut trait_resolver = get_module_type_resolver!(full_trait_path, types.crate_types);
gen_types.learn_associated_types(trait_obj, &trait_resolver);
let mut impl_associated_types = HashMap::new();
for item in i.items.iter() {
// type-conversion logic without actually knowing the concrete native type.
if !resolved_path.starts_with(types.module_path) {
if !first_seg_is_stdlib(resolved_path.split("::").next().unwrap()) {
- writeln!(w, "use crate::{}::native{} as native{};", resolved_path.rsplitn(2, "::").skip(1).next().unwrap(), ident, ident).unwrap();
- writeln!(w, "use crate::{};", resolved_path).unwrap();
- writeln!(w, "use crate::{}_free_void;", resolved_path).unwrap();
+ w_uses.insert(format!("use crate::{}::native{} as native{};", resolved_path.rsplitn(2, "::").skip(1).next().unwrap(), ident, ident));
+ w_uses.insert(format!("use crate::{};", resolved_path));
+ w_uses.insert(format!("use crate::{}_free_void;", resolved_path));
} else {
- writeln!(w, "use {} as native{};", resolved_path, ident).unwrap();
+ w_uses.insert(format!("use {} as native{};", resolved_path, ident));
}
}
writeln!(w, "impl From<native{}> for crate::{} {{", ident, full_trait_path).unwrap();
if is_type_unconstructable(&resolved_path) {
writeln!(w, "\t\tunreachable!();").unwrap();
} else {
- writeln!(w, "\t\tlet mut rust_obj = {} {{ inner: ObjOps::heap_alloc(obj), is_owned: true }};", ident).unwrap();
- writeln!(w, "\t\tlet mut ret = {}_as_{}(&rust_obj);", ident, trait_obj.ident).unwrap();
- writeln!(w, "\t\t// We want to free rust_obj when ret gets drop()'d, not rust_obj, so wipe rust_obj's pointer and set ret's free() fn").unwrap();
- writeln!(w, "\t\trust_obj.inner = core::ptr::null_mut();").unwrap();
+ types.write_to_c_conversion_new_var(w, &format_ident!("obj"), &*i.self_ty, Some(&gen_types), false);
+ write!(w, "\t\tlet rust_obj = ").unwrap();
+ types.write_to_c_conversion_inline_prefix(w, &*i.self_ty, Some(&gen_types), false);
+ write!(w, "obj").unwrap();
+ types.write_to_c_conversion_inline_suffix(w, &*i.self_ty, Some(&gen_types), false);
+ writeln!(w, ";\n\t\tlet mut ret = {}_as_{}(&rust_obj);", ident, trait_obj.ident).unwrap();
+ writeln!(w, "\t\t// We want to free rust_obj when ret gets drop()'d, not rust_obj, so forget it and set ret's free() fn").unwrap();
+ writeln!(w, "\t\tcore::mem::forget(rust_obj);").unwrap();
writeln!(w, "\t\tret.free = Some({}_free_void);", ident).unwrap();
writeln!(w, "\t\tret").unwrap();
}
writeln!(w, "/// This copies the `inner` pointer in this_arg and thus the returned {} must be freed before this_arg is", trait_obj.ident).unwrap();
write!(w, "#[no_mangle]\npub extern \"C\" fn {}_as_{}(this_arg: &{}) -> crate::{} {{\n", ident, trait_obj.ident, ident, full_trait_path).unwrap();
writeln!(w, "\tcrate::{} {{", full_trait_path).unwrap();
- writeln!(w, "\t\tthis_arg: unsafe {{ ObjOps::untweak_ptr((*this_arg).inner) as *mut c_void }},").unwrap();
+ if types.c_type_has_inner_from_path(&resolved_path) {
+ writeln!(w, "\t\tthis_arg: unsafe {{ ObjOps::untweak_ptr((*this_arg).inner) as *mut c_void }},").unwrap();
+ } else {
+ writeln!(w, "\t\tthis_arg: unsafe {{ ObjOps::untweak_ptr(this_arg as *const {} as *mut {}) as *mut c_void }},", ident, ident).unwrap();
+ }
writeln!(w, "\t\tfree: None,").unwrap();
macro_rules! write_meth {
if let syn::Type::Reference(r) = &**rtype {
write!(w, "\n\t\t{}{}: ", $indent, $m.sig.ident).unwrap();
types.write_empty_rust_val(Some(&gen_types), w, &*r.elem);
- writeln!(w, ",\n{}\t\tset_{}: Some({}_{}_set_{}),", $indent, $m.sig.ident, ident, $trait.ident, $m.sig.ident).unwrap();
+ writeln!(w, ".into(),\n{}\t\tset_{}: Some({}_{}_set_{}),", $indent, $m.sig.ident, ident, $trait.ident, $m.sig.ident).unwrap();
printed = true;
}
}
}
let mut requires_clone = false;
walk_supertraits!(trait_obj, Some(&types), (
- ("Clone", _) => {
+ ("Clone", _, _) => {
requires_clone = true;
writeln!(w, "\t\tcloned: Some({}_{}_cloned),", trait_obj.ident, ident).unwrap();
},
- ("Sync", _) => {}, ("Send", _) => {},
- ("std::marker::Sync", _) => {}, ("std::marker::Send", _) => {},
- ("core::fmt::Debug", _) => {},
- (s, t) => {
+ ("Sync", _, _) => {}, ("Send", _, _) => {},
+ ("std::marker::Sync", _, _) => {}, ("std::marker::Send", _, _) => {},
+ ("core::fmt::Debug", _, _) => {
+ writeln!(w, "\t\tdebug_str: {}_debug_str_void,", ident).unwrap();
+ },
+ (s, t, _) => {
if let Some(supertrait_obj) = types.crate_types.traits.get(s) {
- writeln!(w, "\t\t{}: crate::{} {{", t, s).unwrap();
- writeln!(w, "\t\t\tthis_arg: unsafe {{ ObjOps::untweak_ptr((*this_arg).inner) as *mut c_void }},").unwrap();
- writeln!(w, "\t\t\tfree: None,").unwrap();
- for item in supertrait_obj.items.iter() {
- match item {
- syn::TraitItem::Method(m) => {
- write_meth!(m, supertrait_obj, "\t");
+ macro_rules! write_impl_fields {
+ ($s: expr, $supertrait_obj: expr, $t: expr, $pfx: expr, $resolver: expr) => {
+ writeln!(w, "{}\t{}: crate::{} {{", $pfx, $t, $s).unwrap();
+ writeln!(w, "{}\t\tthis_arg: unsafe {{ ObjOps::untweak_ptr((*this_arg).inner) as *mut c_void }},", $pfx).unwrap();
+ writeln!(w, "{}\t\tfree: None,", $pfx).unwrap();
+ for item in $supertrait_obj.items.iter() {
+ match item {
+ syn::TraitItem::Method(m) => {
+ write_meth!(m, $supertrait_obj, $pfx);
+ },
+ _ => {},
+ }
+ }
+ walk_supertraits!($supertrait_obj, Some(&$resolver), (
+ ("Clone", _, _) => {
+ writeln!(w, "{}\tcloned: Some({}_{}_cloned),", $pfx, $supertrait_obj.ident, ident).unwrap();
},
- _ => {},
+ (_, _, _) => {}
+ ) );
}
}
+ write_impl_fields!(s, supertrait_obj, t, "\t", types);
+
+ let resolver = get_module_type_resolver!(s, types.crate_types);
+ walk_supertraits!(supertrait_obj, Some(&resolver), (
+ (s, t, _) => {
+ if let Some(supertrait_obj) = types.crate_types.traits.get(s) {
+ write_impl_fields!(s, supertrait_obj, t, "\t\t", resolver);
+ write!(w, "\t\t\t}},\n").unwrap();
+ }
+ }
+ ) );
write!(w, "\t\t}},\n").unwrap();
} else {
write_trait_impl_field_assign(w, s, ident);
writeln!(w, "\t}}\n}}\n").unwrap();
macro_rules! impl_meth {
- ($m: expr, $trait_meth: expr, $trait_path: expr, $trait: expr, $indent: expr) => {
+ ($m: expr, $trait_meth: expr, $trait_path: expr, $trait: expr, $indent: expr, $types: expr) => {
let trait_method = $trait.items.iter().filter_map(|item| {
if let syn::TraitItem::Method(t_m) = item { Some(t_m) } else { None }
}).find(|trait_meth| trait_meth.sig.ident == $m.sig.ident).unwrap();
}
write!(w, "extern \"C\" fn {}_{}_{}(", ident, $trait.ident, $m.sig.ident).unwrap();
let mut meth_gen_types = gen_types.push_ctx();
- assert!(meth_gen_types.learn_generics(&$m.sig.generics, types));
+ assert!(meth_gen_types.learn_generics(&$m.sig.generics, $types));
let mut uncallable_function = false;
for inp in $m.sig.inputs.iter() {
match inp {
syn::FnArg::Typed(arg) => {
- if types.skip_arg(&*arg.ty, Some(&meth_gen_types)) { continue; }
+ if $types.skip_arg(&*arg.ty, Some(&meth_gen_types)) { continue; }
let mut c_type = Vec::new();
- types.write_c_type(&mut c_type, &*arg.ty, Some(&meth_gen_types), false);
+ $types.write_c_type(&mut c_type, &*arg.ty, Some(&meth_gen_types), false);
if is_type_unconstructable(&String::from_utf8(c_type).unwrap()) {
uncallable_function = true;
}
_ => {}
}
}
- if uncallable_function {
- let mut trait_resolver = get_module_type_resolver!(full_trait_path, types.crate_libs, types.crate_types);
- write_method_params(w, &$trait_meth.sig, "c_void", &mut trait_resolver, Some(&meth_gen_types), true, true);
- } else {
- write_method_params(w, &$m.sig, "c_void", types, Some(&meth_gen_types), true, true);
- }
+ write_method_params(w, &$trait_meth.sig, "c_void", &mut trait_resolver, Some(&meth_gen_types), true, true);
write!(w, " {{\n\t").unwrap();
if uncallable_function {
write!(w, "unreachable!();").unwrap();
} else {
- write_method_var_decl_body(w, &$m.sig, "", types, Some(&meth_gen_types), false);
+ write_method_var_decl_body(w, &$trait_meth.sig, "", &mut trait_resolver, Some(&meth_gen_types), false);
let mut takes_self = false;
for inp in $m.sig.inputs.iter() {
- if let syn::FnArg::Receiver(_) = inp {
- takes_self = true;
+ match inp {
+ syn::FnArg::Receiver(_) => {
+ takes_self = true;
+ break;
+ },
+ syn::FnArg::Typed(ty) => {
+ if let syn::Pat::Ident(id) = &*ty.pat {
+ if format!("{}", id.ident) == "self" {
+ takes_self = true;
+ break;
+ }
+ }
+ }
}
}
- let mut t_gen_args = String::new();
- for (idx, _) in $trait.generics.params.iter().enumerate() {
- if idx != 0 { t_gen_args += ", " };
- t_gen_args += "_"
- }
+ let mut t_gen_args_vec = Vec::new();
+ maybe_write_type_non_lifetime_generics(&mut t_gen_args_vec, &$trait.generics, &trait_resolver);
+ let t_gen_args = String::from_utf8(t_gen_args_vec).unwrap();
if takes_self {
- write!(w, "<native{} as {}<{}>>::{}(unsafe {{ &mut *(this_arg as *mut native{}) }}, ", ident, $trait_path, t_gen_args, $m.sig.ident, ident).unwrap();
+ write!(w, "<native{} as {}{}>::{}(unsafe {{ &mut *(this_arg as *mut native{}) }}, ", ident, $trait_path, t_gen_args, $m.sig.ident, ident).unwrap();
} else {
- write!(w, "<native{} as {}<{}>>::{}(", ident, $trait_path, t_gen_args, $m.sig.ident).unwrap();
+ write!(w, "<native{} as {}{}>::{}(", ident, $trait_path, t_gen_args, $m.sig.ident).unwrap();
}
let mut real_type = "".to_string();
},
_ => {},
}
- write_method_call_params(w, &$m.sig, "", types, Some(&meth_gen_types), &real_type, false);
+ write_method_call_params(w, &$trait_meth.sig, "", &mut trait_resolver, Some(&meth_gen_types), &real_type, false);
}
write!(w, "\n}}\n").unwrap();
if let syn::ReturnType::Type(_, rtype) = &$m.sig.output {
if let syn::Type::Reference(r) = &**rtype {
assert_eq!($m.sig.inputs.len(), 1); // Must only take self
- writeln!(w, "extern \"C\" fn {}_{}_set_{}(trait_self_arg: &{}) {{", ident, $trait.ident, $m.sig.ident, $trait.ident).unwrap();
+ writeln!(w, "extern \"C\" fn {}_{}_set_{}(trait_self_arg: &crate::{}) {{", ident, $trait.ident, $m.sig.ident, $trait_path).unwrap();
writeln!(w, "\t// This is a bit race-y in the general case, but for our specific use-cases today, we're safe").unwrap();
writeln!(w, "\t// Specifically, we must ensure that the first time we're called it can never be in parallel").unwrap();
write!(w, "\tif ").unwrap();
- types.write_empty_rust_val_check(Some(&meth_gen_types), w, &*r.elem, &format!("trait_self_arg.{}", $m.sig.ident));
+ $types.write_empty_rust_val_check(Some(&meth_gen_types), w, &*r.elem, &format!("unsafe {{ &*trait_self_arg.{}.get() }}", $m.sig.ident));
writeln!(w, " {{").unwrap();
- writeln!(w, "\t\tunsafe {{ &mut *(trait_self_arg as *const {} as *mut {}) }}.{} = {}_{}_{}(trait_self_arg.this_arg);", $trait.ident, $trait.ident, $m.sig.ident, ident, $trait.ident, $m.sig.ident).unwrap();
+ writeln!(w, "\t\t*unsafe {{ &mut *(&*(trait_self_arg as *const crate::{})).{}.get() }} = {}_{}_{}(trait_self_arg.this_arg).into();", $trait_path, $m.sig.ident, ident, $trait.ident, $m.sig.ident).unwrap();
writeln!(w, "\t}}").unwrap();
writeln!(w, "}}").unwrap();
}
}
}
- 'impl_item_loop: for item in i.items.iter() {
- match item {
- syn::ImplItem::Method(m) => {
- for trait_item in trait_obj.items.iter() {
- match trait_item {
- syn::TraitItem::Method(meth) => {
+ 'impl_item_loop: for trait_item in trait_obj.items.iter() {
+ match trait_item {
+ syn::TraitItem::Method(meth) => {
+ for item in i.items.iter() {
+ match item {
+ syn::ImplItem::Method(m) => {
if meth.sig.ident == m.sig.ident {
- impl_meth!(m, meth, full_trait_path, trait_obj, "");
+ impl_meth!(m, meth, full_trait_path, trait_obj, "", types);
continue 'impl_item_loop;
}
},
- _ => {},
+ syn::ImplItem::Type(_) => {},
+ _ => unimplemented!(),
}
}
- unreachable!();
+ assert!(meth.default.is_some());
+ let old_gen_types = gen_types;
+ gen_types = GenericTypes::new(Some(resolved_path.clone()));
+ impl_meth!(meth, meth, full_trait_path, trait_obj, "", &mut trait_resolver);
+ gen_types = old_gen_types;
},
- syn::ImplItem::Type(_) => {},
- _ => unimplemented!(),
+ _ => {},
}
}
if requires_clone {
writeln!(w, "extern \"C\" fn {}_{}_cloned(new_obj: &mut crate::{}) {{", trait_obj.ident, ident, full_trait_path).unwrap();
writeln!(w, "\tnew_obj.this_arg = {}_clone_void(new_obj.this_arg);", ident).unwrap();
writeln!(w, "\tnew_obj.free = Some({}_free_void);", ident).unwrap();
- walk_supertraits!(trait_obj, Some(&types), (
- (s, t) => {
- if types.crate_types.traits.get(s).is_some() {
- assert!(!types.is_clonable(s)); // We don't currently support cloning with a clonable supertrait
- writeln!(w, "\tnew_obj.{}.this_arg = new_obj.this_arg;", t).unwrap();
- writeln!(w, "\tnew_obj.{}.free = None;", t).unwrap();
+
+ fn seek_supertraits<W: std::io::Write>(w: &mut W, pfx: &str, tr: &syn::ItemTrait, types: &TypeResolver) {
+ walk_supertraits!(tr, Some(types), (
+ (s, t, _) => {
+ if types.crate_types.traits.get(s).is_some() {
+ assert!(!types.is_clonable(s)); // We don't currently support cloning with a clonable supertrait
+ writeln!(w, "\tnew_obj.{}{}.this_arg = new_obj.this_arg;", pfx, t).unwrap();
+ writeln!(w, "\tnew_obj.{}{}.free = None;", pfx, t).unwrap();
+ let tr = types.crate_types.traits.get(s).unwrap();
+ let resolver = get_module_type_resolver!(s, types.crate_types);
+ seek_supertraits(w, &format!("{}.", t), tr, &resolver);
+ }
}
- }
- ) );
+ ) );
+ }
+ seek_supertraits(w, "", trait_obj, types);
writeln!(w, "}}").unwrap();
}
write!(w, "\n").unwrap();
write!(w, "#[must_use]\n#[no_mangle]\npub extern \"C\" fn {}_default() -> {} {{\n", ident, ident).unwrap();
write!(w, "\t{} {{ inner: ObjOps::heap_alloc(Default::default()), is_owned: true }}\n", ident).unwrap();
write!(w, "}}\n").unwrap();
- } else if path_matches_nongeneric(&trait_path.1, &["core", "cmp", "PartialEq"]) {
- } else if path_matches_nongeneric(&trait_path.1, &["core", "cmp", "Eq"]) {
+ } else if full_trait_path_opt.as_ref().map(|s| s.as_str()) == Some("core::cmp::PartialEq") {
+ } else if full_trait_path_opt.as_ref().map(|s| s.as_str()) == Some("core::cmp::Eq") {
writeln!(w, "/// Checks if two {}s contain equal inner contents.", ident).unwrap();
writeln!(w, "/// This ignores pointers and is_owned flags and looks at the values in fields.").unwrap();
if types.c_type_has_inner_from_path(&resolved_path) {
types.write_from_c_conversion_suffix(w, &ref_type, Some(&gen_types));
writeln!(w, " {{ true }} else {{ false }}\n}}").unwrap();
- } else if path_matches_nongeneric(&trait_path.1, &["core", "hash", "Hash"]) {
- writeln!(w, "/// Checks if two {}s contain equal inner contents.", ident).unwrap();
+ } else if full_trait_path_opt.as_ref().map(|s| s.as_str()) == Some("core::hash::Hash") {
+ writeln!(w, "/// Generates a non-cryptographic 64-bit hash of the {}.", ident).unwrap();
write!(w, "#[no_mangle]\npub extern \"C\" fn {}_hash(o: &{}) -> u64 {{\n", ident, ident).unwrap();
if types.c_type_has_inner_from_path(&resolved_path) {
write!(w, "\tif o.inner.is_null() {{ return 0; }}\n").unwrap();
types.write_from_c_conversion_suffix(w, &ref_type, Some(&gen_types));
writeln!(w, ", &mut hasher);").unwrap();
writeln!(w, "\tcore::hash::Hasher::finish(&hasher)\n}}").unwrap();
- } else if (path_matches_nongeneric(&trait_path.1, &["core", "clone", "Clone"]) || path_matches_nongeneric(&trait_path.1, &["Clone"])) &&
- types.c_type_has_inner_from_path(&resolved_path) {
+ } else if (full_trait_path_opt.as_ref().map(|s| s.as_str()) == Some("core::clone::Clone") || path_matches_nongeneric(&trait_path.1, &["Clone"])) &&
+ types.c_type_has_inner_from_path(&resolved_path) {
writeln!(w, "impl Clone for {} {{", ident).unwrap();
writeln!(w, "\tfn clone(&self) -> Self {{").unwrap();
writeln!(w, "\t\tSelf {{").unwrap();
writeln!(w, "#[allow(unused)]").unwrap();
writeln!(w, "/// Used only if an object of this type is returned as a trait impl by a method").unwrap();
writeln!(w, "pub(crate) extern \"C\" fn {}_clone_void(this_ptr: *const c_void) -> *mut c_void {{", ident).unwrap();
- writeln!(w, "\tBox::into_raw(Box::new(unsafe {{ (*(this_ptr as *mut native{})).clone() }})) as *mut c_void", ident).unwrap();
+ writeln!(w, "\tBox::into_raw(Box::new(unsafe {{ (*(this_ptr as *const native{})).clone() }})) as *mut c_void", ident).unwrap();
writeln!(w, "}}").unwrap();
writeln!(w, "#[no_mangle]").unwrap();
writeln!(w, "/// Creates a copy of the {}", ident).unwrap();
writeln!(w, "\torig.clone()").unwrap();
writeln!(w, "}}").unwrap();
} else if path_matches_nongeneric(&trait_path.1, &["FromStr"]) {
- if let Some(container) = types.get_c_mangled_container_type(
- vec![&*i.self_ty, &syn::Type::Tuple(syn::TypeTuple { paren_token: Default::default(), elems: syn::punctuated::Punctuated::new() })],
- Some(&gen_types), "Result") {
+ let mut err_opt = None;
+ for item in i.items.iter() {
+ match item {
+ syn::ImplItem::Type(ty) if format!("{}", ty.ident) == "Err" => {
+ err_opt = Some(&ty.ty);
+ },
+ _ => {}
+ }
+ }
+ let err_ty = err_opt.unwrap();
+ if let Some(container) = types.get_c_mangled_container_type(vec![&*i.self_ty, &err_ty], Some(&gen_types), "Result") {
writeln!(w, "#[no_mangle]").unwrap();
writeln!(w, "/// Read a {} object from a string", ident).unwrap();
writeln!(w, "pub extern \"C\" fn {}_from_str(s: crate::c_types::Str) -> {} {{", ident, container).unwrap();
writeln!(w, "\tmatch {}::from_str(s.into_str()) {{", resolved_path).unwrap();
+
writeln!(w, "\t\tOk(r) => {{").unwrap();
let new_var = types.write_to_c_conversion_new_var(w, &format_ident!("r"), &*i.self_ty, Some(&gen_types), false);
write!(w, "\t\t\tcrate::c_types::CResultTempl::ok(\n\t\t\t\t").unwrap();
write!(w, "{}r", if new_var { "local_" } else { "" }).unwrap();
types.write_to_c_conversion_inline_suffix(w, &*i.self_ty, Some(&gen_types), false);
writeln!(w, "\n\t\t\t)\n\t\t}},").unwrap();
- writeln!(w, "\t\tErr(e) => crate::c_types::CResultTempl::err(()),").unwrap();
+
+ writeln!(w, "\t\tErr(e) => {{").unwrap();
+ let new_var = types.write_to_c_conversion_new_var(w, &format_ident!("e"), &err_ty, Some(&gen_types), false);
+ write!(w, "\t\t\tcrate::c_types::CResultTempl::err(\n\t\t\t\t").unwrap();
+ types.write_to_c_conversion_inline_prefix(w, &err_ty, Some(&gen_types), false);
+ write!(w, "{}e", if new_var { "local_" } else { "" }).unwrap();
+ types.write_to_c_conversion_inline_suffix(w, &err_ty, Some(&gen_types), false);
+ writeln!(w, "\n\t\t\t)\n\t\t}},").unwrap();
+
writeln!(w, "\t}}.into()\n}}").unwrap();
}
- } else if path_matches_nongeneric(&trait_path.1, &["Display"]) {
+ } else if full_trait_path_opt.as_ref().map(|s| s.as_str()) == Some("core::fmt::Debug") {
+ writeln!(w, "/// Get a string which allows debug introspection of a {} object", ident).unwrap();
+ writeln!(w, "pub extern \"C\" fn {}_debug_str_void(o: *const c_void) -> Str {{", ident).unwrap();
+
+ write!(w, "\talloc::format!(\"{{:?}}\", unsafe {{ o as *const crate::{} }}).into()", resolved_path).unwrap();
+ writeln!(w, "}}").unwrap();
+ } else if full_trait_path_opt.as_ref().map(|s| s.as_str()) == Some("core::fmt::Display") ||
+ path_matches_nongeneric(&trait_path.1, &["Display"])
+ {
writeln!(w, "#[no_mangle]").unwrap();
writeln!(w, "/// Get the string representation of a {} object", ident).unwrap();
writeln!(w, "pub extern \"C\" fn {}_to_str(o: &crate::{}) -> Str {{", ident, resolved_path).unwrap();
let self_ty = &i.self_ty;
let ref_type: syn::Type = syn::parse_quote!(&#self_ty);
let new_var = types.write_from_c_conversion_new_var(w, &format_ident!("o"), &ref_type, Some(&gen_types));
- write!(w, "\tformat!(\"{{}}\", ").unwrap();
+ write!(w, "\talloc::format!(\"{{}}\", ").unwrap();
types.write_from_c_conversion_prefix(w, &ref_type, Some(&gen_types));
write!(w, "{}o", if new_var { "local_" } else { "" }).unwrap();
types.write_from_c_conversion_suffix(w, &ref_type, Some(&gen_types));
maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types);
}
} else {
- let declared_type = (*types.get_declared_type(&ident).unwrap()).clone();
+ let is_opaque = types.crate_types.opaques.contains_key(&resolved_path);
+ let is_mirrored_enum = types.crate_types.mirrored_enums.contains_key(&resolved_path);
for item in i.items.iter() {
match item {
syn::ImplItem::Method(m) => {
ExportStatus::NoExport|ExportStatus::TestOnly => continue,
ExportStatus::NotImplementable => panic!("(C-not implementable) must only appear on traits"),
}
+ if m.sig.asyncness.is_some() { continue; }
let mut meth_gen_types = gen_types.push_ctx();
assert!(meth_gen_types.learn_generics(&m.sig.generics, types));
if m.defaultness.is_some() { unimplemented!(); }
writeln!(w, "#[must_use]").unwrap();
}
write!(w, "#[no_mangle]\npub extern \"C\" fn {}_{}(", ident, m.sig.ident).unwrap();
- let ret_type = match &declared_type {
- DeclType::MirroredEnum => format!("{}", ident),
- DeclType::StructImported {..} => format!("{}", ident),
- _ => unimplemented!(),
- };
+ let ret_type = format!("crate::{}", resolved_path);
write_method_params(w, &m.sig, &ret_type, types, Some(&meth_gen_types), false, true);
write!(w, " {{\n\t").unwrap();
write_method_var_decl_body(w, &m.sig, "", types, Some(&meth_gen_types), false);
let mut takes_mut_self = false;
let mut takes_owned_self = false;
for inp in m.sig.inputs.iter() {
- if let syn::FnArg::Receiver(r) = inp {
- takes_self = true;
- if r.mutability.is_some() { takes_mut_self = true; }
- if r.reference.is_none() { takes_owned_self = true; }
+ match inp {
+ syn::FnArg::Receiver(r) => {
+ takes_self = true;
+ if r.mutability.is_some() { takes_mut_self = true; }
+ if r.reference.is_none() { takes_owned_self = true; }
+ break;
+ },
+ syn::FnArg::Typed(ty) => {
+ if let syn::Pat::Ident(id) = &*ty.pat {
+ if format!("{}", id.ident) == "self" {
+ takes_self = true;
+ if id.mutability.is_some() { takes_mut_self = true; }
+ if id.by_ref.is_none() { takes_owned_self = true; }
+ break;
+ }
+ }
+ }
}
}
if !takes_mut_self && !takes_self {
write!(w, "{}::{}(", resolved_path, m.sig.ident).unwrap();
} else {
- match &declared_type {
- DeclType::MirroredEnum => write!(w, "this_arg.to_native().{}(", m.sig.ident).unwrap(),
- DeclType::StructImported {..} => {
- if takes_owned_self {
- write!(w, "(*unsafe {{ Box::from_raw(this_arg.take_inner()) }}).{}(", m.sig.ident).unwrap();
- } else if takes_mut_self {
- write!(w, "unsafe {{ &mut (*ObjOps::untweak_ptr(this_arg.inner as *mut native{})) }}.{}(", ident, m.sig.ident).unwrap();
- } else {
- write!(w, "unsafe {{ &*ObjOps::untweak_ptr(this_arg.inner) }}.{}(", m.sig.ident).unwrap();
- }
- },
- _ => unimplemented!(),
+ if is_mirrored_enum {
+ write!(w, "this_arg.to_native().{}(", m.sig.ident).unwrap();
+ } else if is_opaque {
+ if takes_owned_self {
+ write!(w, "(*unsafe {{ Box::from_raw(this_arg.take_inner()) }}).{}(", m.sig.ident).unwrap();
+ } else if takes_mut_self {
+ write!(w, "unsafe {{ &mut (*ObjOps::untweak_ptr(this_arg.inner as *mut crate::{}::native{})) }}.{}(", rsplit_once(&resolved_path, "::").unwrap().0, ident, m.sig.ident).unwrap();
+ } else {
+ write!(w, "unsafe {{ &*ObjOps::untweak_ptr(this_arg.inner) }}.{}(", m.sig.ident).unwrap();
+ }
+ } else {
+ unimplemented!();
}
}
write_method_call_params(w, &m.sig, "", types, Some(&meth_gen_types), &ret_type, false);
}
}
} else if let Some(resolved_path) = types.maybe_resolve_ident(&ident) {
- if let Some(aliases) = types.crate_types.reverse_alias_map.get(&resolved_path).cloned() {
- 'alias_impls: for (alias, arguments) in aliases {
- let alias_resolved = types.resolve_path(&alias, None);
- for (idx, gen) in i.generics.params.iter().enumerate() {
- match gen {
- syn::GenericParam::Type(type_param) => {
- 'bounds_check: for bound in type_param.bounds.iter() {
- if let syn::TypeParamBound::Trait(trait_bound) = bound {
- if let syn::PathArguments::AngleBracketed(ref t) = &arguments {
- assert!(idx < t.args.len());
- if let syn::GenericArgument::Type(syn::Type::Path(p)) = &t.args[idx] {
- let generic_arg = types.resolve_path(&p.path, None);
- let generic_bound = types.resolve_path(&trait_bound.path, None);
- if let Some(traits_impld) = types.crate_types.trait_impls.get(&generic_arg) {
- for trait_impld in traits_impld {
- if *trait_impld == generic_bound { continue 'bounds_check; }
- }
- eprintln!("struct {}'s generic arg {} didn't match bound {}", alias_resolved, generic_arg, generic_bound);
- continue 'alias_impls;
- } else {
- eprintln!("struct {}'s generic arg {} didn't match bound {}", alias_resolved, generic_arg, generic_bound);
- continue 'alias_impls;
- }
- } else { unimplemented!(); }
- } else { unimplemented!(); }
- } else { unimplemented!(); }
- }
- },
- syn::GenericParam::Lifetime(_) => {},
- syn::GenericParam::Const(_) => unimplemented!(),
- }
- }
- let aliased_impl = syn::ItemImpl {
- attrs: i.attrs.clone(),
- brace_token: syn::token::Brace(Span::call_site()),
- defaultness: None,
- generics: syn::Generics {
- lt_token: None,
- params: syn::punctuated::Punctuated::new(),
- gt_token: None,
- where_clause: None,
- },
- impl_token: syn::Token![impl](Span::call_site()),
- items: i.items.clone(),
- self_ty: Box::new(syn::Type::Path(syn::TypePath { qself: None, path: alias.clone() })),
- trait_: i.trait_.clone(),
- unsafety: None,
- };
- writeln_impl(w, &aliased_impl, types);
- }
- } else {
- eprintln!("Not implementing anything for {} due to it being marked not exported", ident);
- }
+ create_alias_for_impl(resolved_path, i, types, move |aliased_impl, types| writeln_impl(w, w_uses, &aliased_impl, types));
} else {
eprintln!("Not implementing anything for {} due to no-resolve (probably the type isn't pub)", ident);
}
}
}
+fn create_alias_for_impl<F: FnMut(syn::ItemImpl, &mut TypeResolver)>(resolved_path: String, i: &syn::ItemImpl, types: &mut TypeResolver, mut callback: F) {
+ if let Some(aliases) = types.crate_types.reverse_alias_map.get(&resolved_path).cloned() {
+ let mut gen_types = Some(GenericTypes::new(Some(resolved_path.clone())));
+ if !gen_types.as_mut().unwrap().learn_generics(&i.generics, types) {
+ gen_types = None;
+ }
+ let alias_module = rsplit_once(&resolved_path, "::").unwrap().0;
+
+ 'alias_impls: for (alias_resolved, arguments) in aliases {
+ let mut new_ty_generics = Vec::new();
+ let mut new_ty_bounds = Vec::new();
+ let mut need_generics = false;
+
+ let alias_resolver_override;
+ let alias_resolver = if alias_module != types.module_path {
+ alias_resolver_override = ImportResolver::new(types.types.crate_name, &types.crate_types.lib_ast,
+ alias_module, &types.crate_types.lib_ast.modules.get(alias_module).unwrap().items);
+ &alias_resolver_override
+ } else { &types.types };
+ let mut where_clause = syn::WhereClause { where_token: syn::Token![where](Span::call_site()),
+ predicates: syn::punctuated::Punctuated::new()
+ };
+ for (idx, gen) in i.generics.params.iter().enumerate() {
+ match gen {
+ syn::GenericParam::Type(type_param) => {
+ 'bounds_check: for bound in type_param.bounds.iter() {
+ if let syn::TypeParamBound::Trait(trait_bound) = bound {
+ if let syn::PathArguments::AngleBracketed(ref t) = &arguments {
+ assert!(idx < t.args.len());
+ if let syn::GenericArgument::Type(syn::Type::Path(p)) = &t.args[idx] {
+ let generic_bound = types.maybe_resolve_path(&trait_bound.path, None)
+ .unwrap_or_else(|| format!("{}::{}", types.module_path, single_ident_generic_path_to_ident(&trait_bound.path).unwrap()));
+
+ if let Some(generic_arg) = alias_resolver.maybe_resolve_path(&p.path, None) {
+ new_ty_generics.push((type_param.ident.clone(), syn::Type::Path(p.clone())));
+ if let Some(traits_impld) = types.crate_types.trait_impls.get(&generic_arg) {
+ for trait_impld in traits_impld {
+ if *trait_impld == generic_bound { continue 'bounds_check; }
+ }
+ eprintln!("struct {}'s generic arg {} didn't match bound {}", alias_resolved, generic_arg, generic_bound);
+ continue 'alias_impls;
+ } else {
+ eprintln!("struct {}'s generic arg {} didn't match bound {}", alias_resolved, generic_arg, generic_bound);
+ continue 'alias_impls;
+ }
+ } else if gen_types.is_some() {
+ let resp = types.maybe_resolve_path(&p.path, gen_types.as_ref());
+ if generic_bound == "core::ops::Deref" && resp.is_some() {
+ new_ty_bounds.push((type_param.ident.clone(),
+ string_path_to_syn_path("core::ops::Deref")));
+ let mut bounds = syn::punctuated::Punctuated::new();
+ bounds.push(syn::TypeParamBound::Trait(syn::TraitBound {
+ paren_token: None,
+ modifier: syn::TraitBoundModifier::None,
+ lifetimes: None,
+ path: string_path_to_syn_path(&types.resolve_path(&p.path, gen_types.as_ref())),
+ }));
+ let mut path = string_path_to_syn_path(&format!("{}::Target", type_param.ident));
+ path.leading_colon = None;
+ where_clause.predicates.push(syn::WherePredicate::Type(syn::PredicateType {
+ lifetimes: None,
+ bounded_ty: syn::Type::Path(syn::TypePath { qself: None, path }),
+ colon_token: syn::Token![:](Span::call_site()),
+ bounds,
+ }));
+ } else {
+ new_ty_generics.push((type_param.ident.clone(),
+ gen_types.as_ref().resolve_type(&syn::Type::Path(p.clone())).clone()));
+ }
+ need_generics = true;
+ } else {
+ unimplemented!();
+ }
+ } else { unimplemented!(); }
+ } else { unimplemented!(); }
+ } else { unimplemented!(); }
+ }
+ },
+ syn::GenericParam::Lifetime(_) => {},
+ syn::GenericParam::Const(_) => unimplemented!(),
+ }
+ }
+ let mut params = syn::punctuated::Punctuated::new();
+ let alias = string_path_to_syn_path(&alias_resolved);
+ let real_aliased =
+ if need_generics {
+ let alias_generics = types.crate_types.opaques.get(&alias_resolved).unwrap().1;
+
+ // If we need generics on the alias, create impl generic bounds...
+ assert_eq!(new_ty_generics.len() + new_ty_bounds.len(), i.generics.params.len());
+ let mut args = syn::punctuated::Punctuated::new();
+ for (ident, param) in new_ty_generics.drain(..) {
+ // TODO: We blindly assume that generics in the type alias and
+ // the aliased type have the same names, which we really shouldn't.
+ if alias_generics.params.iter().any(|generic|
+ if let syn::GenericParam::Type(t) = generic { t.ident == ident } else { false })
+ {
+ args.push(parse_quote!(#ident));
+ }
+ params.push(syn::GenericParam::Type(syn::TypeParam {
+ attrs: Vec::new(),
+ ident,
+ colon_token: None,
+ bounds: syn::punctuated::Punctuated::new(),
+ eq_token: Some(syn::token::Eq(Span::call_site())),
+ default: Some(param),
+ }));
+ }
+ for (ident, param) in new_ty_bounds.drain(..) {
+ // TODO: We blindly assume that generics in the type alias and
+ // the aliased type have the same names, which we really shouldn't.
+ if alias_generics.params.iter().any(|generic|
+ if let syn::GenericParam::Type(t) = generic { t.ident == ident } else { false })
+ {
+ args.push(parse_quote!(#ident));
+ }
+ params.push(syn::GenericParam::Type(syn::TypeParam {
+ attrs: Vec::new(),
+ ident,
+ colon_token: Some(syn::token::Colon(Span::call_site())),
+ bounds: syn::punctuated::Punctuated::from_iter(
+ Some(syn::TypeParamBound::Trait(syn::TraitBound {
+ path: param, paren_token: None, lifetimes: None,
+ modifier: syn::TraitBoundModifier::None,
+ }))
+ ),
+ eq_token: None,
+ default: None,
+ }));
+ }
+ // ... and swap the last segment of the impl self_ty to use the generic bounds.
+ let mut res = alias.clone();
+ res.segments.last_mut().unwrap().arguments = syn::PathArguments::AngleBracketed(syn::AngleBracketedGenericArguments {
+ colon2_token: None,
+ lt_token: syn::token::Lt(Span::call_site()),
+ args,
+ gt_token: syn::token::Gt(Span::call_site()),
+ });
+ res
+ } else { alias.clone() };
+ callback(syn::ItemImpl {
+ attrs: i.attrs.clone(),
+ brace_token: syn::token::Brace(Span::call_site()),
+ defaultness: None,
+ generics: syn::Generics {
+ lt_token: None,
+ params,
+ gt_token: None,
+ where_clause: Some(where_clause),
+ },
+ impl_token: syn::Token![impl](Span::call_site()),
+ items: i.items.clone(),
+ self_ty: Box::new(syn::Type::Path(syn::TypePath { qself: None, path: real_aliased })),
+ trait_: i.trait_.clone(),
+ unsafety: None,
+ }, types);
+ }
+ } else {
+ eprintln!("Not implementing anything for {} due to it being marked not exported", resolved_path);
+ }
+}
+
/// Replaces upper case charachters with underscore followed by lower case except the first
/// charachter and repeated upper case characthers (which are only made lower case).
fn camel_to_snake_case(camel: &str) -> String {
let mut needs_free = false;
let mut constr = Vec::new();
+ let mut is_clonable = true;
- writeln!(w, "#[must_use]\n#[derive(Clone)]\n#[repr(C)]\npub enum {} {{", e.ident).unwrap();
+ for var in e.variants.iter() {
+ if let syn::Fields::Named(fields) = &var.fields {
+ needs_free = true;
+ for field in fields.named.iter() {
+ if export_status(&field.attrs) == ExportStatus::TestOnly { continue; }
+
+ let mut ty_checks = Vec::new();
+ types.write_c_type(&mut ty_checks, &field.ty, Some(&gen_types), false);
+ if !types.is_clonable(&String::from_utf8(ty_checks).unwrap()) {
+ is_clonable = false;
+ }
+ }
+ } else if let syn::Fields::Unnamed(fields) = &var.fields {
+ for field in fields.unnamed.iter() {
+ let mut ty_checks = Vec::new();
+ types.write_c_type(&mut ty_checks, &field.ty, Some(&gen_types), false);
+ let ty = String::from_utf8(ty_checks).unwrap();
+ if ty != "" && !types.is_clonable(&ty) {
+ is_clonable = false;
+ }
+ }
+ }
+ }
+
+ if is_clonable {
+ writeln!(w, "#[derive(Clone)]").unwrap();
+ types.crate_types.set_clonable(format!("{}::{}", types.module_path, e.ident));
+ }
+ writeln!(w, "#[must_use]\n#[repr(C)]\npub enum {} {{", e.ident).unwrap();
for var in e.variants.iter() {
assert_eq!(export_status(&var.attrs), ExportStatus::Export); // We can't partially-export a mirrored enum
writeln_docs(w, &var.attrs, "\t");
writeln_field_docs(w, &field.attrs, "\t\t", types, Some(&gen_types), &field.ty);
write!(w, "\t\t{}: ", field.ident.as_ref().unwrap()).unwrap();
write!(&mut constr, "{}{}: ", if idx != 0 { ", " } else { "" }, field.ident.as_ref().unwrap()).unwrap();
- types.write_c_type(w, &field.ty, Some(&gen_types), false);
- types.write_c_type(&mut constr, &field.ty, Some(&gen_types), false);
+ types.write_c_type(w, &field.ty, Some(&gen_types), true);
+ types.write_c_type(&mut constr, &field.ty, Some(&gen_types), true);
writeln!(w, ",").unwrap();
}
write!(w, "\t}}").unwrap();
} else if let syn::Fields::Unnamed(fields) = &var.fields {
if fields.unnamed.len() == 1 {
let mut empty_check = Vec::new();
- types.write_c_type(&mut empty_check, &fields.unnamed[0].ty, Some(&gen_types), false);
+ types.write_c_type(&mut empty_check, &fields.unnamed[0].ty, Some(&gen_types), true);
if empty_check.is_empty() {
empty_tuple_variant = true;
}
}
if !empty_tuple_variant {
needs_free = true;
- write!(w, "(").unwrap();
+ writeln!(w, "(").unwrap();
for (idx, field) in fields.unnamed.iter().enumerate() {
if export_status(&field.attrs) == ExportStatus::TestOnly { continue; }
+ writeln_field_docs(w, &field.attrs, "\t\t", types, Some(&gen_types), &field.ty);
+ write!(w, "\t\t").unwrap();
+ types.write_c_type(w, &field.ty, Some(&gen_types), true);
+
write!(&mut constr, "{}: ", ('a' as u8 + idx as u8) as char).unwrap();
- types.write_c_type(w, &field.ty, Some(&gen_types), false);
types.write_c_type(&mut constr, &field.ty, Some(&gen_types), false);
if idx != fields.unnamed.len() - 1 {
- write!(w, ",").unwrap();
+ writeln!(w, ",").unwrap();
write!(&mut constr, ",").unwrap();
}
}
write!(w, ")").unwrap();
}
}
- if var.discriminant.is_some() { unimplemented!(); }
write!(&mut constr, ") -> {} {{\n\t{}::{}", e.ident, e.ident, var.ident).unwrap();
if let syn::Fields::Named(fields) = &var.fields {
writeln!(&mut constr, " {{").unwrap();
} else if let syn::Fields::Unnamed(fields) = &var.fields {
if !empty_tuple_variant {
write!(&mut constr, "(").unwrap();
- for idx in 0..fields.unnamed.len() {
- write!(&mut constr, "{}, ", ('a' as u8 + idx as u8) as char).unwrap();
+ for (idx, field) in fields.unnamed.iter().enumerate() {
+ let mut ref_c_ty = Vec::new();
+ let mut nonref_c_ty = Vec::new();
+ types.write_c_type(&mut ref_c_ty, &field.ty, Some(&gen_types), false);
+ types.write_c_type(&mut nonref_c_ty, &field.ty, Some(&gen_types), true);
+
+ if ref_c_ty != nonref_c_ty {
+ // We blindly assume references in field types are always opaque types, and
+ // print out an opaque reference -> owned reference conversion here.
+ write!(&mut constr, "{} {{ inner: {}.inner, is_owned: false }}, ", String::from_utf8(nonref_c_ty).unwrap(), ('a' as u8 + idx as u8) as char).unwrap();
+ } else {
+ write!(&mut constr, "{}, ", ('a' as u8 + idx as u8) as char).unwrap();
+ }
}
writeln!(&mut constr, ")").unwrap();
} else {
writeln!(&mut constr, "}}").unwrap();
writeln!(w, ",").unwrap();
}
- writeln!(w, "}}\nuse {}::{} as native{};\nimpl {} {{", types.module_path, e.ident, e.ident, e.ident).unwrap();
+ writeln!(w, "}}\nuse {}::{} as {}Import;", types.module_path, e.ident, e.ident).unwrap();
+ write!(w, "pub(crate) type native{} = {}Import", e.ident, e.ident).unwrap();
+ maybe_write_generics(w, &e.generics, &syn::PathArguments::None, &types, true);
+ writeln!(w, ";\n\nimpl {} {{", e.ident).unwrap();
macro_rules! write_conv {
($fn_sig: expr, $to_c: expr, $ref: expr) => {
- writeln!(w, "\t#[allow(unused)]\n\tpub(crate) fn {} {{\n\t\tmatch {} {{", $fn_sig, if $to_c { "native" } else { "self" }).unwrap();
+ writeln!(w, "\t#[allow(unused)]\n\tpub(crate) fn {} {{", $fn_sig).unwrap();
+ if $to_c && $ref {
+ writeln!(w, "\t\tlet native = unsafe {{ &*(native as *const _ as *const c_void as *const native{}) }};", e.ident).unwrap();
+ }
+ writeln!(w, "\t\tmatch {} {{", if $to_c { "native" } else { "self" }).unwrap();
for var in e.variants.iter() {
write!(w, "\t\t\t{}{}::{} ", if $to_c { "native" } else { "" }, e.ident, var.ident).unwrap();
let mut empty_tuple_variant = false;
} else if let syn::Fields::Unnamed(fields) = &var.fields {
if fields.unnamed.len() == 1 {
let mut empty_check = Vec::new();
- types.write_c_type(&mut empty_check, &fields.unnamed[0].ty, Some(&gen_types), false);
+ types.write_c_type(&mut empty_check, &fields.unnamed[0].ty, Some(&gen_types), true);
if empty_check.is_empty() {
empty_tuple_variant = true;
}
let mut sink = ::std::io::sink();
let mut out: &mut dyn std::io::Write = if $ref { &mut sink } else { w };
let new_var = if $to_c {
- types.write_to_c_conversion_new_var(&mut out, $field_ident, &$field.ty, Some(&gen_types), false)
+ types.write_to_c_conversion_new_var(&mut out, $field_ident, &$field.ty, Some(&gen_types), true)
} else {
types.write_from_c_conversion_new_var(&mut out, $field_ident, &$field.ty, Some(&gen_types))
};
if $ref || new_var {
if $ref {
- write!(w, "let mut {}_nonref = (*{}).clone();\n\t\t\t\t", $field_ident, $field_ident).unwrap();
+ write!(w, "let mut {}_nonref = Clone::clone({});\n\t\t\t\t", $field_ident, $field_ident).unwrap();
if new_var {
let nonref_ident = format_ident!("{}_nonref", $field_ident);
if $to_c {
- types.write_to_c_conversion_new_var(w, &nonref_ident, &$field.ty, Some(&gen_types), false);
+ types.write_to_c_conversion_new_var(w, &nonref_ident, &$field.ty, Some(&gen_types), true);
} else {
types.write_from_c_conversion_new_var(w, &nonref_ident, &$field.ty, Some(&gen_types));
}
($field: expr, $field_ident: expr) => { {
if export_status(&$field.attrs) == ExportStatus::TestOnly { continue; }
if $to_c {
- types.write_to_c_conversion_inline_prefix(w, &$field.ty, Some(&gen_types), false);
+ types.write_to_c_conversion_inline_prefix(w, &$field.ty, Some(&gen_types), true);
} else {
types.write_from_c_conversion_prefix(w, &$field.ty, Some(&gen_types));
}
write!(w, "{}{}", $field_ident,
if $ref { "_nonref" } else { "" }).unwrap();
if $to_c {
- types.write_to_c_conversion_inline_suffix(w, &$field.ty, Some(&gen_types), false);
+ types.write_to_c_conversion_inline_suffix(w, &$field.ty, Some(&gen_types), true);
} else {
types.write_from_c_conversion_suffix(w, &$field.ty, Some(&gen_types));
}
}
}
- write_conv!(format!("to_native(&self) -> native{}", e.ident), false, true);
+ if is_clonable {
+ write_conv!(format!("to_native(&self) -> native{}", e.ident), false, true);
+ }
write_conv!(format!("into_native(self) -> native{}", e.ident), false, false);
- write_conv!(format!("from_native(native: &native{}) -> Self", e.ident), true, true);
+ if is_clonable {
+ let mut args = Vec::new();
+ maybe_write_non_lifetime_generics(&mut args, &e.generics, &syn::PathArguments::None, &types);
+ let fn_line = format!("from_native(native: &{}Import{}) -> Self", e.ident, String::from_utf8(args).unwrap());
+ write_conv!(fn_line, true, true);
+ }
write_conv!(format!("native_into(native: native{}) -> Self", e.ident), true, false);
writeln!(w, "}}").unwrap();
writeln!(w, "/// Frees any resources used by the {}", e.ident).unwrap();
writeln!(w, "#[no_mangle]\npub extern \"C\" fn {}_free(this_ptr: {}) {{ }}", e.ident, e.ident).unwrap();
}
- writeln!(w, "/// Creates a copy of the {}", e.ident).unwrap();
- writeln!(w, "#[no_mangle]").unwrap();
- writeln!(w, "pub extern \"C\" fn {}_clone(orig: &{}) -> {} {{", e.ident, e.ident, e.ident).unwrap();
- writeln!(w, "\torig.clone()").unwrap();
- writeln!(w, "}}").unwrap();
+ if is_clonable {
+ writeln!(w, "/// Creates a copy of the {}", e.ident).unwrap();
+ writeln!(w, "#[no_mangle]").unwrap();
+ writeln!(w, "pub extern \"C\" fn {}_clone(orig: &{}) -> {} {{", e.ident, e.ident, e.ident).unwrap();
+ writeln!(w, "\torig.clone()").unwrap();
+ writeln!(w, "}}").unwrap();
+ writeln!(w, "#[allow(unused)]").unwrap();
+ writeln!(w, "/// Used only if an object of this type is returned as a trait impl by a method").unwrap();
+ writeln!(w, "pub(crate) extern \"C\" fn {}_clone_void(this_ptr: *const c_void) -> *mut c_void {{", e.ident).unwrap();
+ writeln!(w, "\tBox::into_raw(Box::new(unsafe {{ (*(this_ptr as *const {})).clone() }})) as *mut c_void", e.ident).unwrap();
+ writeln!(w, "}}").unwrap();
+ }
+
+ writeln!(w, "#[allow(unused)]").unwrap();
+ writeln!(w, "/// Used only if an object of this type is returned as a trait impl by a method").unwrap();
+ writeln!(w, "pub(crate) extern \"C\" fn {}_free_void(this_ptr: *mut c_void) {{", e.ident).unwrap();
+ writeln!(w, "\tlet _ = unsafe {{ Box::from_raw(this_ptr as *mut {}) }};\n}}", e.ident).unwrap();
+
w.write_all(&constr).unwrap();
write_cpp_wrapper(cpp_headers, &format!("{}", e.ident), needs_free, None);
}
writeln_fn_docs(w, &f.attrs, "", types, Some(&gen_types), f.sig.inputs.iter(), &f.sig.output);
write!(w, "#[no_mangle]\npub extern \"C\" fn {}(", f.sig.ident).unwrap();
+
+
write_method_params(w, &f.sig, "", types, Some(&gen_types), false, true);
write!(w, " {{\n\t").unwrap();
write_method_var_decl_body(w, &f.sig, "", types, Some(&gen_types), false);
- write!(w, "{}::{}(", types.module_path, f.sig.ident).unwrap();
+ write!(w, "{}::{}", types.module_path, f.sig.ident).unwrap();
+
+ let mut function_generic_args = Vec::new();
+ maybe_write_generics(&mut function_generic_args, &f.sig.generics, &syn::PathArguments::None, types, true);
+ if !function_generic_args.is_empty() {
+ write!(w, "::{}", String::from_utf8(function_generic_args).unwrap()).unwrap();
+ }
+ write!(w, "(").unwrap();
+
write_method_call_params(w, &f.sig, "", types, Some(&gen_types), "", false);
writeln!(w, "\n}}\n").unwrap();
}
// *** File/Crate Walking Logic ***
// ********************************
-fn convert_priv_mod<'a, 'b: 'a, W: std::io::Write>(w: &mut W, libast: &'b FullLibraryAST, crate_types: &CrateTypes<'b>, out_dir: &str, mod_path: &str, module: &'b syn::ItemMod) {
+fn convert_priv_mod<'a, 'b: 'a, W: std::io::Write>(w: &mut W, w_uses: &mut HashSet<String, NonRandomHash>, libast: &'b FullLibraryAST, crate_types: &CrateTypes<'b>, out_dir: &str, mod_path: &str, module: &'b syn::ItemMod) {
// We want to ignore all items declared in this module (as they are not pub), but we still need
// to give the ImportResolver any use statements, so we copy them here.
let mut use_items = Vec::new();
use_items.push(item);
}
}
- let import_resolver = ImportResolver::from_borrowed_items(mod_path.splitn(2, "::").next().unwrap(), &libast.dependencies, mod_path, &use_items);
+ let import_resolver = ImportResolver::from_borrowed_items(mod_path.splitn(2, "::").next().unwrap(), libast, mod_path, &use_items);
let mut types = TypeResolver::new(mod_path, import_resolver, crate_types);
writeln!(w, "mod {} {{\n{}", module.ident, DEFAULT_IMPORTS).unwrap();
for item in module.content.as_ref().unwrap().1.iter() {
match item {
- syn::Item::Mod(m) => convert_priv_mod(w, libast, crate_types, out_dir, &format!("{}::{}", mod_path, module.ident), m),
+ syn::Item::Mod(m) => convert_priv_mod(w, w_uses, libast, crate_types, out_dir, &format!("{}::{}", mod_path, module.ident), m),
syn::Item::Impl(i) => {
- if let &syn::Type::Path(ref p) = &*i.self_ty {
- if p.path.get_ident().is_some() {
- writeln_impl(w, i, &mut types);
- }
- }
+ writeln_impl(w, w_uses, i, &mut types);
},
_ => {},
}
let _ = std::fs::create_dir((&new_file_path.as_ref() as &std::path::Path).parent().unwrap());
let mut out = std::fs::OpenOptions::new().write(true).create(true).truncate(true)
.open(new_file_path).expect("Unable to open new src file");
+ let mut out_uses = HashSet::default();
writeln!(out, "// This file is Copyright its original authors, visible in version control").unwrap();
writeln!(out, "// history and in the source files from which this was generated.").unwrap();
eprintln!("Converting {} entries...", module);
- let import_resolver = ImportResolver::new(orig_crate, &libast.dependencies, module, items);
+ let import_resolver = ImportResolver::new(orig_crate, libast, module, items);
let mut type_resolver = TypeResolver::new(module, import_resolver, crate_types);
for item in items.iter() {
}
},
syn::Item::Impl(i) => {
- writeln_impl(&mut out, &i, &mut type_resolver);
+ writeln_impl(&mut out, &mut out_uses, &i, &mut type_resolver);
},
syn::Item::Struct(s) => {
if let syn::Visibility::Public(_) = s.vis {
}
},
syn::Item::Mod(m) => {
- convert_priv_mod(&mut out, libast, crate_types, out_dir, &format!("{}::{}", module, m.ident), m);
+ convert_priv_mod(&mut out, &mut out_uses, libast, crate_types, out_dir, &format!("{}::{}", module, m.ident), m);
},
syn::Item::Const(c) => {
// Re-export any primitive-type constants.
ExportStatus::NotImplementable => panic!("(C-not implementable) must only appear on traits"),
}
- let mut process_alias = true;
- for tok in t.generics.params.iter() {
- if let syn::GenericParam::Lifetime(_) = tok {}
- else { process_alias = false; }
- }
- if process_alias {
- match &*t.ty {
- syn::Type::Path(_) =>
- writeln_opaque(&mut out, &t.ident, &format!("{}", t.ident), &t.generics, &t.attrs, &type_resolver, header_file, cpp_header_file),
- _ => {}
- }
+ match &*t.ty {
+ syn::Type::Path(p) => {
+ let real_ty = type_resolver.resolve_path(&p.path, None);
+ let real_generic_bounds = type_resolver.crate_types.opaques.get(&real_ty).map(|t| t.1).or(
+ type_resolver.crate_types.priv_structs.get(&real_ty).map(|r| *r)).unwrap();
+ let mut resolved_generics = t.generics.clone();
+
+ // Assume blindly that the bounds in the struct definition where
+ // clause matches any equivalent bounds on the type alias.
+ assert!(resolved_generics.where_clause.is_none());
+ resolved_generics.where_clause = real_generic_bounds.where_clause.clone();
+
+ if let syn::PathArguments::AngleBracketed(real_generics) = &p.path.segments.last().unwrap().arguments {
+ for (real_idx, real_param) in real_generics.args.iter().enumerate() {
+ if let syn::GenericArgument::Type(syn::Type::Path(real_param_path)) = real_param {
+ for param in resolved_generics.params.iter_mut() {
+ if let syn::GenericParam::Type(type_param) = param {
+ if Some(&type_param.ident) == real_param_path.path.get_ident() {
+ if let syn::GenericParam::Type(real_type_param) = &real_generic_bounds.params[real_idx] {
+ type_param.bounds = real_type_param.bounds.clone();
+ type_param.default = real_type_param.default.clone();
+
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ writeln_opaque(&mut out, &t.ident, &format!("{}", t.ident), &resolved_generics, &t.attrs, &type_resolver, header_file, cpp_header_file)},
+ _ => {}
}
}
},
}
}
+ for use_stmt in out_uses {
+ writeln!(out, "{}", use_stmt).unwrap();
+ }
+
out.flush().unwrap();
}
}
+
+/// Walk the FullLibraryAST, determining if impl aliases need to be marked cloneable.
+fn walk_ast_second_pass<'a>(ast_storage: &'a FullLibraryAST, crate_types: &CrateTypes<'a>) {
+ for (module, astmod) in ast_storage.modules.iter() {
+ let orig_crate = module.splitn(2, "::").next().unwrap();
+ let ASTModule { ref attrs, ref items, .. } = astmod;
+ assert_eq!(export_status(&attrs), ExportStatus::Export);
+
+ let import_resolver = ImportResolver::new(orig_crate, ast_storage, module, items);
+ let mut types = TypeResolver::new(module, import_resolver, crate_types);
+
+ for item in items.iter() {
+ match item {
+ syn::Item::Impl(i) => {
+ match export_status(&i.attrs) {
+ ExportStatus::Export => {},
+ ExportStatus::NoExport|ExportStatus::TestOnly => continue,
+ ExportStatus::NotImplementable => panic!("(C-not implementable) must only appear on traits"),
+ }
+ if let Some(trait_path) = i.trait_.as_ref() {
+ if path_matches_nongeneric(&trait_path.1, &["core", "clone", "Clone"]) ||
+ path_matches_nongeneric(&trait_path.1, &["Clone"])
+ {
+ if let &syn::Type::Path(ref p) = &*i.self_ty {
+ if let Some(resolved_path) = types.maybe_resolve_path(&p.path, None) {
+ create_alias_for_impl(resolved_path, i, &mut types, |aliased_impl, types| {
+ if let &syn::Type::Path(ref p) = &*aliased_impl.self_ty {
+ if let Some(resolved_aliased_path) = types.maybe_resolve_path(&p.path, None) {
+ crate_types.set_clonable("crate::".to_owned() + &resolved_aliased_path);
+ }
+ }
+ });
+ }
+ }
+ }
+ }
+ }
+ _ => {}
+ }
+ }
+ }
+}
+
fn walk_private_mod<'a>(ast_storage: &'a FullLibraryAST, orig_crate: &str, module: String, items: &'a syn::ItemMod, crate_types: &mut CrateTypes<'a>) {
- let import_resolver = ImportResolver::new(orig_crate, &ast_storage.dependencies, &module, &items.content.as_ref().unwrap().1);
+ let import_resolver = ImportResolver::new(orig_crate, ast_storage, &module, &items.content.as_ref().unwrap().1);
for item in items.content.as_ref().unwrap().1.iter() {
match item {
syn::Item::Mod(m) => walk_private_mod(ast_storage, orig_crate, format!("{}::{}", module, m.ident), m, crate_types),
if let Some(trait_path) = i.trait_.as_ref() {
if let Some(tp) = import_resolver.maybe_resolve_path(&trait_path.1, None) {
if let Some(sp) = import_resolver.maybe_resolve_path(&p.path, None) {
- match crate_types.trait_impls.entry(sp) {
- hash_map::Entry::Occupied(mut e) => { e.get_mut().push(tp); },
- hash_map::Entry::Vacant(e) => { e.insert(vec![tp]); },
+ match crate_types.trait_impls.entry(sp.clone()) {
+ hash_map::Entry::Occupied(mut e) => { e.get_mut().push(tp.clone()); },
+ hash_map::Entry::Vacant(e) => { e.insert(vec![tp.clone()]); },
+ }
+ match crate_types.traits_impld.entry(tp) {
+ hash_map::Entry::Occupied(mut e) => { e.get_mut().push(sp); },
+ hash_map::Entry::Vacant(e) => { e.insert(vec![sp]); },
}
}
}
}
/// Walk the FullLibraryAST, deciding how things will be mapped and adding tracking to CrateTypes.
-fn walk_ast<'a>(ast_storage: &'a FullLibraryAST, crate_types: &mut CrateTypes<'a>) {
+fn walk_ast_first_pass<'a>(ast_storage: &'a FullLibraryAST, crate_types: &mut CrateTypes<'a>) {
for (module, astmod) in ast_storage.modules.iter() {
let ASTModule { ref attrs, ref items, submods: _ } = astmod;
assert_eq!(export_status(&attrs), ExportStatus::Export);
let orig_crate = module.splitn(2, "::").next().unwrap();
- let import_resolver = ImportResolver::new(orig_crate, &ast_storage.dependencies, module, items);
+ let import_resolver = ImportResolver::new(orig_crate, ast_storage, module, items);
for item in items.iter() {
match item {
syn::Item::Struct(s) => {
if let syn::Visibility::Public(_) = s.vis {
+ let struct_path = format!("{}::{}", module, s.ident);
match export_status(&s.attrs) {
ExportStatus::Export => {},
- ExportStatus::NoExport|ExportStatus::TestOnly => continue,
+ ExportStatus::NoExport|ExportStatus::TestOnly => {
+ crate_types.priv_structs.insert(struct_path, &s.generics);
+ continue
+ },
ExportStatus::NotImplementable => panic!("(C-not implementable) must only appear on traits"),
}
- let struct_path = format!("{}::{}", module, s.ident);
crate_types.opaques.insert(struct_path, (&s.ident, &s.generics));
}
},
}
let trait_path = format!("{}::{}", module, t.ident);
walk_supertraits!(t, None, (
- ("Clone", _) => {
+ ("Clone", _, _) => {
crate_types.set_clonable("crate::".to_owned() + &trait_path);
},
- (_, _) => {}
+ (_, _, _) => {}
) );
crate_types.traits.insert(trait_path, &t);
}
ExportStatus::NotImplementable => panic!("(C-not implementable) must only appear on traits"),
}
let type_path = format!("{}::{}", module, t.ident);
- let mut process_alias = true;
- for tok in t.generics.params.iter() {
- if let syn::GenericParam::Lifetime(_) = tok {}
- else { process_alias = false; }
- }
- if process_alias {
- match &*t.ty {
- syn::Type::Path(p) => {
- let t_ident = &t.ident;
-
- // If its a path with no generics, assume we don't map the aliased type and map it opaque
- let path_obj = parse_quote!(#t_ident);
- let args_obj = p.path.segments.last().unwrap().arguments.clone();
- match crate_types.reverse_alias_map.entry(import_resolver.maybe_resolve_path(&p.path, None).unwrap()) {
- hash_map::Entry::Occupied(mut e) => { e.get_mut().push((path_obj, args_obj)); },
- hash_map::Entry::Vacant(e) => { e.insert(vec![(path_obj, args_obj)]); },
- }
-
- crate_types.opaques.insert(type_path, (t_ident, &t.generics));
- },
- _ => {
- crate_types.type_aliases.insert(type_path, import_resolver.resolve_imported_refs((*t.ty).clone()));
+ match &*t.ty {
+ syn::Type::Path(p) => {
+ // If its a path with no generics, assume we don't map the aliased type and map it opaque
+ let args_obj = p.path.segments.last().unwrap().arguments.clone();
+ match crate_types.reverse_alias_map.entry(import_resolver.maybe_resolve_path(&p.path, None).unwrap()) {
+ hash_map::Entry::Occupied(mut e) => { e.get_mut().push((type_path.clone(), args_obj)); },
+ hash_map::Entry::Vacant(e) => { e.insert(vec![(type_path.clone(), args_obj)]); },
}
+
+ crate_types.opaques.insert(type_path, (&t.ident, &t.generics));
+ },
+ _ => {
+ crate_types.type_aliases.insert(type_path, import_resolver.resolve_imported_refs((*t.ty).clone()));
}
}
}
}
if let Some(tp) = import_resolver.maybe_resolve_path(&trait_path.1, None) {
if let Some(sp) = import_resolver.maybe_resolve_path(&p.path, None) {
- match crate_types.trait_impls.entry(sp) {
- hash_map::Entry::Occupied(mut e) => { e.get_mut().push(tp); },
- hash_map::Entry::Vacant(e) => { e.insert(vec![tp]); },
+ match crate_types.trait_impls.entry(sp.clone()) {
+ hash_map::Entry::Occupied(mut e) => { e.get_mut().push(tp.clone()); },
+ hash_map::Entry::Vacant(e) => { e.insert(vec![tp.clone()]); },
+ }
+ match crate_types.traits_impld.entry(tp) {
+ hash_map::Entry::Occupied(mut e) => { e.get_mut().push(sp); },
+ hash_map::Entry::Vacant(e) => { e.insert(vec![sp]); },
}
}
}
// ...then walk the ASTs tracking what types we will map, and how, so that we can resolve them
// when parsing other file ASTs...
let mut libtypes = CrateTypes::new(&mut derived_templates, &libast);
- walk_ast(&libast, &mut libtypes);
+ walk_ast_first_pass(&libast, &mut libtypes);
+
+ // ... using the generated data, determine a few additional fields, specifically which type
+ // aliases are to be clone-able...
+ walk_ast_second_pass(&libast, &libtypes);
// ... finally, do the actual file conversion/mapping, writing out types as we go.
convert_file(&libast, &libtypes, &args[1], &mut header_file, &mut cpp_header_file);