ReferenceAsPointer,
}
+#[derive(PartialEq)]
+/// Describes the appropriate place to print a general type-conversion string when converting a
+/// container.
+enum ContainerPrefixLocation {
+ /// Prints a general type-conversion string prefix and suffix outside of the
+ /// container-conversion strings.
+ OutsideConv,
+ /// Prints a general type-conversion string prefix and suffix inside of the
+ /// container-conversion strings.
+ PerConv,
+ /// Does not print the usual type-conversion string prefix and suffix.
+ NoPrefix,
+}
+
impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
pub fn new(orig_crate: &'a str, module_path: &'a str, types: ImportResolver<'a, 'c>, crate_types: &'a mut CrateTypes<'c>) -> Self {
Self { orig_crate, module_path, types, crate_types }
fn to_c_conversion_container_new_var<'b>(&self, generics: Option<&GenericTypes>, full_path: &str, is_ref: bool, single_contained: Option<&syn::Type>, var_name: &syn::Ident, var_access: &str)
// Returns prefix + Vec<(prefix, var-name-to-inline-convert)> + suffix
// expecting one element in the vec per generic type, each of which is inline-converted
- -> Option<(&'b str, Vec<(String, String)>, &'b str)> {
+ -> Option<(&'b str, Vec<(String, String)>, &'b str, ContainerPrefixLocation)> {
match full_path {
"Result" if !is_ref => {
Some(("match ",
vec![(" { Ok(mut o) => crate::c_types::CResultTempl::ok(".to_string(), "o".to_string()),
(").into(), Err(mut e) => crate::c_types::CResultTempl::err(".to_string(), "e".to_string())],
- ").into() }"))
+ ").into() }", ContainerPrefixLocation::PerConv))
},
"Vec" if !is_ref => {
- Some(("Vec::new(); for mut item in ", vec![(format!(".drain(..) {{ local_{}.push(", var_name), "item".to_string())], "); }"))
+ Some(("Vec::new(); for mut item in ", vec![(format!(".drain(..) {{ local_{}.push(", var_name), "item".to_string())], "); }", ContainerPrefixLocation::PerConv))
},
"Slice" => {
- Some(("Vec::new(); for item in ", vec![(format!(".iter() {{ local_{}.push(", var_name), "**item".to_string())], "); }"))
+ Some(("Vec::new(); for item in ", vec![(format!(".iter() {{ local_{}.push(", var_name), "**item".to_string())], "); }", ContainerPrefixLocation::PerConv))
},
"Option" => {
if let Some(syn::Type::Path(p)) = single_contained {
if is_ref {
return Some(("if ", vec![
(".is_none() { std::ptr::null() } else { ".to_owned(), format!("({}.as_ref().unwrap())", var_access))
- ], " }"));
+ ], " }", ContainerPrefixLocation::OutsideConv));
} else {
return Some(("if ", vec![
(".is_none() { std::ptr::null_mut() } else { ".to_owned(), format!("({}.unwrap())", var_access))
- ], " }"));
+ ], " }", ContainerPrefixLocation::OutsideConv));
}
}
}
let s = String::from_utf8(v).unwrap();
return Some(("if ", vec![
(format!(".is_none() {{ {} }} else {{ ", s), format!("({}.unwrap())", var_access))
- ], " }"));
+ ], " }", ContainerPrefixLocation::PerConv));
} else { unreachable!(); }
},
_ => None,
fn from_c_conversion_container_new_var<'b>(&self, generics: Option<&GenericTypes>, full_path: &str, is_ref: bool, single_contained: Option<&syn::Type>, var_name: &syn::Ident, var_access: &str)
// Returns prefix + Vec<(prefix, var-name-to-inline-convert)> + suffix
// expecting one element in the vec per generic type, each of which is inline-converted
- -> Option<(&'b str, Vec<(String, String)>, &'b str)> {
+ -> Option<(&'b str, Vec<(String, String)>, &'b str, ContainerPrefixLocation)> {
match full_path {
"Result" if !is_ref => {
Some(("match ",
vec![(".result_ok { true => Ok(".to_string(), format!("(*unsafe {{ Box::from_raw(<*mut _>::take_ptr(&mut {}.contents.result)) }})", var_access)),
("), false => Err(".to_string(), format!("(*unsafe {{ Box::from_raw(<*mut _>::take_ptr(&mut {}.contents.err)) }})", var_access))],
- ")}"))
- },
- "Vec"|"Slice" if !is_ref => {
- Some(("Vec::new(); for mut item in ", vec![(format!(".into_rust().drain(..) {{ local_{}.push(", var_name), "item".to_string())], "); }"))
+ ")}", ContainerPrefixLocation::PerConv))
},
"Slice" if is_ref => {
- Some(("Vec::new(); for mut item in ", vec![(format!(".as_slice().iter() {{ local_{}.push(", var_name), "item".to_string())], "); }"))
+ Some(("Vec::new(); for mut item in ", vec![(format!(".as_slice().iter() {{ local_{}.push(", var_name), "item".to_string())], "); }", ContainerPrefixLocation::PerConv))
+ },
+ "Vec"|"Slice" => {
+ Some(("Vec::new(); for mut item in ", vec![(format!(".into_rust().drain(..) {{ local_{}.push(", var_name), "item".to_string())], "); }", ContainerPrefixLocation::PerConv))
},
"Option" => {
if let Some(syn::Type::Path(p)) = single_contained {
if self.c_type_has_inner_from_path(&self.resolve_path(&p.path, generics)) {
if is_ref {
- return Some(("if ", vec![(".inner.is_null() { None } else { Some((*".to_string(), format!("{}", var_access))], ").clone()) }"))
+ return Some(("if ", vec![(".inner.is_null() { None } else { Some((*".to_string(), format!("{}", var_access))], ").clone()) }", ContainerPrefixLocation::PerConv))
} else {
- return Some(("if ", vec![(".inner.is_null() { None } else { Some(".to_string(), format!("{}", var_access))], ") }"));
+ return Some(("if ", vec![(".inner.is_null() { None } else { Some(".to_string(), format!("{}", var_access))], ") }", ContainerPrefixLocation::PerConv));
}
}
}
EmptyValExpectedTy::ReferenceAsPointer =>
return Some(("if ", vec![
(format!("{} {{ None }} else {{ Some(", s), format!("unsafe {{ &mut *{} }}", var_access))
- ], ") }")),
+ ], ") }", ContainerPrefixLocation::NoPrefix)),
EmptyValExpectedTy::OwnedPointer =>
return Some(("if ", vec![
(format!("{} {{ None }} else {{ Some(", s), format!("unsafe {{ *Box::from_raw({}) }}", var_access))
- ], ") }")),
+ ], ") }", ContainerPrefixLocation::NoPrefix)),
EmptyValExpectedTy::NonPointer =>
return Some(("if ", vec![
(format!("{} {{ None }} else {{ Some(", s), format!("{}", var_access))
- ], ") }")),
+ ], ") }", ContainerPrefixLocation::PerConv)),
}
} else { unreachable!(); }
},
fn write_conversion_new_var_intern<'b, W: std::io::Write,
LP: Fn(&str, bool) -> Option<(&str, &str)>,
- LC: Fn(&str, bool, Option<&syn::Type>, &syn::Ident, &str) -> Option<(&'b str, Vec<(String, String)>, &'b str)>,
+ LC: Fn(&str, bool, Option<&syn::Type>, &syn::Ident, &str) -> Option<(&'b str, Vec<(String, String)>, &'b str, ContainerPrefixLocation)>,
VP: Fn(&mut W, &syn::Type, Option<&GenericTypes>, bool, bool, bool),
VS: Fn(&mut W, &syn::Type, Option<&GenericTypes>, bool, bool, bool)>
(&self, w: &mut W, ident: &syn::Ident, var: &str, t: &syn::Type, generics: Option<&GenericTypes>,
// For slices (and Options), we refuse to directly map them as is_ref when they
// aren't opaque types containing an inner pointer. This is due to the fact that,
// in both cases, the actual higher-level type is non-is_ref.
- let ty_has_inner = if self.is_transparent_container(&$container_type, is_ref) || $container_type == "Slice" {
+ let ty_has_inner = if $args_len == 1 {
let ty = $args_iter().next().unwrap();
if $container_type == "Slice" && to_c {
// "To C ptr_for_ref" means "return the regular object with is_owned
let mut only_contained_type = None;
let mut only_contained_has_inner = false;
let mut contains_slice = false;
- if $args_len == 1 && self.is_transparent_container(&$container_type, is_ref) {
+ if $args_len == 1 {
only_contained_has_inner = ty_has_inner;
let arg = $args_iter().next().unwrap();
if let syn::Type::Reference(t) = arg {
} else if let syn::Type::Slice(_) = &*t.elem {
contains_slice = true;
} else { return false; }
- needs_ref_map = true;
- } else if let syn::Type::Path(_) = arg {
+ // If the inner element contains an inner pointer, we will just use that,
+ // avoiding the need to map elements to references. Otherwise we'll need to
+ // do an extra mapping step.
+ needs_ref_map = !only_contained_has_inner;
+ } else {
only_contained_type = Some(&arg);
- } else { unimplemented!(); }
+ }
}
- if let Some((prefix, conversions, suffix)) = container_lookup(&$container_type, is_ref && ty_has_inner, only_contained_type, ident, var) {
+ if let Some((prefix, conversions, suffix, prefix_location)) = container_lookup(&$container_type, is_ref && ty_has_inner, only_contained_type, ident, var) {
assert_eq!(conversions.len(), $args_len);
write!(w, "let mut local_{}{} = ", ident, if !to_c && needs_ref_map {"_base"} else { "" }).unwrap();
- if only_contained_has_inner && to_c {
+ if prefix_location == ContainerPrefixLocation::OutsideConv {
var_prefix(w, $args_iter().next().unwrap(), generics, is_ref, ptr_for_ref, true);
}
write!(w, "{}{}", prefix, var).unwrap();
let new_var = self.write_conversion_new_var_intern(w, &syn::Ident::new(&new_var_name, Span::call_site()),
&var_access, conv_ty, generics, contains_slice || (is_ref && ty_has_inner), ptr_for_ref, to_c, path_lookup, container_lookup, var_prefix, var_suffix);
if new_var { write!(w, " ").unwrap(); }
- if (!only_contained_has_inner || !to_c) && !contains_slice {
- var_prefix(w, conv_ty, generics, is_ref && ty_has_inner, ptr_for_ref, false);
- }
- if !is_ref && !needs_ref_map && to_c && only_contained_has_inner {
+ if prefix_location == ContainerPrefixLocation::PerConv {
+ var_prefix(w, conv_ty, generics, is_ref && ty_has_inner, ptr_for_ref, false);
+ } else if !is_ref && !needs_ref_map && to_c && only_contained_has_inner {
write!(w, "Box::into_raw(Box::new(").unwrap();
}
+
write!(w, "{}{}", if contains_slice { "local_" } else { "" }, if new_var { new_var_name } else { var_access }).unwrap();
- if (!only_contained_has_inner || !to_c) && !contains_slice {
+ if prefix_location == ContainerPrefixLocation::PerConv {
var_suffix(w, conv_ty, generics, is_ref && ty_has_inner, ptr_for_ref, false);
- }
- if !is_ref && !needs_ref_map && to_c && only_contained_has_inner {
+ } else if !is_ref && !needs_ref_map && to_c && only_contained_has_inner {
write!(w, "))").unwrap();
}
write!(w, " }}").unwrap();
}
write!(w, "{}", suffix).unwrap();
- if only_contained_has_inner && to_c {
+ if prefix_location == ContainerPrefixLocation::OutsideConv {
var_suffix(w, $args_iter().next().unwrap(), generics, is_ref, ptr_for_ref, true);
}
write!(w, ";").unwrap();
projects / ldk-c-bindings / commitdiff