From 3de0d5027919a51348d1daa6100558bfbb466ef7 Mon Sep 17 00:00:00 2001 From: Matt Corallo Date: Mon, 4 Jan 2021 20:58:58 -0500 Subject: [PATCH] [bindings] Drop some stale code from bindings generic generation --- c-bindings-gen/src/types.rs | 112 ++++++------------------------------ 1 file changed, 19 insertions(+), 93 deletions(-) diff --git a/c-bindings-gen/src/types.rs b/c-bindings-gen/src/types.rs index b6321a350..1cd3e88ac 100644 --- a/c-bindings-gen/src/types.rs +++ b/c-bindings-gen/src/types.rs @@ -1714,102 +1714,28 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { // *** C Container Type Equivalent and alias Printing *** // ****************************************************** - fn write_template_constructor(&mut self, w: &mut W, container_type: &str, mangled_container: &str, args: &Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool { - if container_type.ends_with("Tuple") { - write!(w, "#[no_mangle]\npub extern \"C\" fn {}_new(", mangled_container).unwrap(); - for (idx, gen) in args.iter().enumerate() { - write!(w, "{}{}: ", if idx != 0 { ", " } else { "" }, ('a' as u8 + idx as u8) as char).unwrap(); - if !self.write_c_type_intern(w, gen, None, false, false, false) { return false; } - } - writeln!(w, ") -> {} {{", mangled_container).unwrap(); - write!(w, "\t{} {{ ", mangled_container).unwrap(); - for idx in 0..args.len() { - write!(w, "{}, ", ('a' as u8 + idx as u8) as char).unwrap(); - } - writeln!(w, "}}\n}}\n").unwrap(); - } else { - writeln!(w, "").unwrap(); - } - true - } - - fn write_template_generics<'b, W: std::io::Write>(&mut self, w: &mut W, args: &mut dyn Iterator, generics: Option<&GenericTypes>, is_ref: bool, in_crate: bool) { + fn write_template_generics<'b, W: std::io::Write>(&mut self, w: &mut W, args: &mut dyn Iterator, generics: Option<&GenericTypes>, is_ref: bool) -> bool { + assert!(!is_ref); // We don't currently support outer reference types for (idx, t) in args.enumerate() { if idx != 0 { write!(w, ", ").unwrap(); } - if let syn::Type::Tuple(tup) = t { - if tup.elems.is_empty() { - write!(w, "u8").unwrap(); - } else { - let mut inner_args = Vec::new(); - for arg in tup.elems.iter() { - inner_args.push(arg); - } - assert!(self.write_c_mangled_container_path(w, inner_args, generics, &format!("{}Tuple", tup.elems.len()), is_ref, false, false)); - } - } else if let syn::Type::Path(p_arg) = t { - let resolved_generic = self.resolve_path(&p_arg.path, generics); - if self.is_primitive(&resolved_generic) { - write!(w, "{}", resolved_generic).unwrap(); - } else if let Some(c_type) = self.c_type_from_path(&resolved_generic, is_ref, false) { - if self.is_known_container(&resolved_generic, is_ref) { - assert!(resolved_generic == "Vec" || resolved_generic == "Result"); - let mut inner_args = Vec::new(); - if let syn::PathArguments::AngleBracketed(args) = &p_arg.path.segments.iter().next().unwrap().arguments { - for arg in args.args.iter() { - if let syn::GenericArgument::Type(t) = arg { inner_args.push(t) } else { unimplemented!() }; - } - } else { unimplemented!(); } - assert!(self.write_c_mangled_container_path(w, inner_args, generics, &resolved_generic, is_ref, false, false)); - } else if resolved_generic == "Option" { - if let syn::PathArguments::AngleBracketed(args) = &p_arg.path.segments.iter().next().unwrap().arguments { - self.write_template_generics(w, &mut args.args.iter().map(|gen| - if let syn::GenericArgument::Type(t) = gen { t } else { unimplemented!() }), - generics, is_ref, in_crate); - } else { unimplemented!(); } - } else if in_crate { - write!(w, "{}", c_type).unwrap(); - } else { - self.write_rust_type(w, generics, &t); - } - } else { - // If we just write out resolved_generic, it may mostly work, however for - // original types which are generic, we need the template args. We could - // figure them out and write them out, too, but its much easier to just - // reference the native{} type alias which exists at least for opaque types. - if in_crate { - write!(w, "crate::{}", resolved_generic).unwrap(); - } else { - let path_name: Vec<&str> = resolved_generic.rsplitn(2, "::").collect(); - if path_name.len() > 1 { - write!(w, "crate::{}::native{}", path_name[1], path_name[0]).unwrap(); - } else { - write!(w, "crate::native{}", path_name[0]).unwrap(); - } - } - } - } else if let syn::Type::Reference(r_arg) = t { + if let syn::Type::Reference(r_arg) = t { + if !self.write_c_type_intern(w, &*r_arg.elem, generics, false, false, false) { return false; } + + // While write_c_type_intern, above is correct, we don't want to blindly convert a + // reference to something stupid, so check that the container is either opaque or a + // predefined type (currently only Transaction). if let syn::Type::Path(p_arg) = &*r_arg.elem { let resolved = self.resolve_path(&p_arg.path, generics); - if self.crate_types.opaques.get(&resolved).is_some() { - write!(w, "crate::{}", resolved).unwrap(); - } else { - let cty = self.c_type_from_path(&resolved, true, true).expect("Template generics should be opaque or have a predefined mapping"); - w.write(cty.as_bytes()).unwrap(); - } + assert!(self.crate_types.opaques.get(&resolved).is_some() || + self.c_type_from_path(&resolved, true, true).is_some(), "Template generics should be opaque or have a predefined mapping"); } else { unimplemented!(); } - } else if let syn::Type::Array(a_arg) = t { - if let syn::Type::Path(p_arg) = &*a_arg.elem { - let resolved = self.resolve_path(&p_arg.path, generics); - assert!(self.is_primitive(&resolved)); - if let syn::Expr::Lit(syn::ExprLit { lit: syn::Lit::Int(len), .. }) = &a_arg.len { - write!(w, "{}", - self.c_type_from_path(&format!("[{}; {}]", resolved, len.base10_digits()), is_ref, false).unwrap()).unwrap(); - } - } + } else { + if !self.write_c_type_intern(w, t, generics, false, false, false) { return false; } } } + true } fn check_create_container(&mut self, mangled_container: String, container_type: &str, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool { if !self.crate_types.templates_defined.get(&mangled_container).is_some() { @@ -1821,10 +1747,10 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { if tup.elems.is_empty() { write!(&mut a_ty, "()").unwrap(); } else { - self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref, true); + if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref) { return false; } } } else { - self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref, true); + if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref) { return false; } } let mut b_ty: Vec = Vec::new(); @@ -1832,22 +1758,22 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { if tup.elems.is_empty() { write!(&mut b_ty, "()").unwrap(); } else { - self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref, true); + if !self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref) { return false; } } } else { - self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref, true); + if !self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref) { return false; } } write_result_block(&mut created_container, &mangled_container, &String::from_utf8(a_ty).unwrap(), &String::from_utf8(b_ty).unwrap()); } else if container_type == "Vec" { let mut a_ty: Vec = Vec::new(); - self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t), generics, is_ref, true); + if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t), generics, is_ref) { return false; } write_vec_block(&mut created_container, &mangled_container, &String::from_utf8(a_ty).unwrap()); } else if container_type.ends_with("Tuple") { let mut tuple_args = Vec::new(); for arg in args.iter() { let mut ty: Vec = Vec::new(); - self.write_template_generics(&mut ty, &mut [arg].iter().map(|t| **t), generics, is_ref, true); + if !self.write_template_generics(&mut ty, &mut [arg].iter().map(|t| **t), generics, is_ref) { return false; } tuple_args.push(String::from_utf8(ty).unwrap()); } write_tuple_block(&mut created_container, &mangled_container, &tuple_args); -- 2.39.5