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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use std::collections::HashMap;
use std::io::Write;
use syn::ext::IdentExt;
use crate::bindgen::config::{Config, Language};
use crate::bindgen::declarationtyperesolver::DeclarationTypeResolver;
use crate::bindgen::dependencies::Dependencies;
use crate::bindgen::ir::{
AnnotationSet, Cfg, ConditionWrite, Documentation, Field, GenericArgument, GenericParams, Item,
ItemContainer, Path, ToCondition, Type,
};
use crate::bindgen::library::Library;
use crate::bindgen::mangle;
use crate::bindgen::monomorph::Monomorphs;
use crate::bindgen::writer::{Source, SourceWriter};
/// A type alias that is represented as a C typedef
#[derive(Debug, Clone)]
pub struct Typedef {
pub path: Path,
pub export_name: String,
pub generic_params: GenericParams,
pub aliased: Type,
pub cfg: Option<Cfg>,
pub annotations: AnnotationSet,
pub documentation: Documentation,
}
impl Typedef {
pub fn load(item: &syn::ItemType, mod_cfg: Option<&Cfg>) -> Result<Typedef, String> {
if let Some(x) = Type::load(&item.ty)? {
let path = Path::new(item.ident.unraw().to_string());
Ok(Typedef::new(
path,
GenericParams::load(&item.generics)?,
x,
Cfg::append(mod_cfg, Cfg::load(&item.attrs)),
AnnotationSet::load(&item.attrs)?,
Documentation::load(&item.attrs),
))
} else {
Err("Cannot have a typedef of a zero sized type.".to_owned())
}
}
pub fn new(
path: Path,
generic_params: GenericParams,
aliased: Type,
cfg: Option<Cfg>,
annotations: AnnotationSet,
documentation: Documentation,
) -> Self {
let export_name = path.name().to_owned();
Self {
path,
export_name,
generic_params,
aliased,
cfg,
annotations,
documentation,
}
}
pub fn simplify_standard_types(&mut self, config: &Config) {
self.aliased.simplify_standard_types(config);
}
pub fn transfer_annotations(&mut self, out: &mut HashMap<Path, AnnotationSet>) {
if self.annotations.is_empty() {
return;
}
if let Some(alias_path) = self.aliased.get_root_path() {
if out.contains_key(&alias_path) {
warn!(
"Multiple typedef's with annotations for {}. Ignoring annotations from {}.",
alias_path, self.path
);
return;
}
out.insert(alias_path, self.annotations.clone());
self.annotations = AnnotationSet::new();
}
}
pub fn is_generic(&self) -> bool {
self.generic_params.len() > 0
}
pub fn add_monomorphs(&self, library: &Library, out: &mut Monomorphs) {
// Generic structs can instantiate monomorphs only once they've been
// instantiated. See `instantiate_monomorph` for more details.
if self.is_generic() {
return;
}
self.aliased.add_monomorphs(library, out);
}
pub fn mangle_paths(&mut self, monomorphs: &Monomorphs) {
self.aliased.mangle_paths(monomorphs);
}
}
impl Item for Typedef {
fn path(&self) -> &Path {
&self.path
}
fn export_name(&self) -> &str {
&self.export_name
}
fn cfg(&self) -> Option<&Cfg> {
self.cfg.as_ref()
}
fn annotations(&self) -> &AnnotationSet {
&self.annotations
}
fn annotations_mut(&mut self) -> &mut AnnotationSet {
&mut self.annotations
}
fn container(&self) -> ItemContainer {
ItemContainer::Typedef(self.clone())
}
fn rename_for_config(&mut self, config: &Config) {
config.export.rename(&mut self.export_name);
self.aliased.rename_for_config(config, &self.generic_params);
}
fn collect_declaration_types(&self, resolver: &mut DeclarationTypeResolver) {
resolver.add_none(&self.path);
}
fn resolve_declaration_types(&mut self, resolver: &DeclarationTypeResolver) {
self.aliased.resolve_declaration_types(resolver);
}
fn add_dependencies(&self, library: &Library, out: &mut Dependencies) {
self.aliased
.add_dependencies_ignoring_generics(&self.generic_params, library, out);
}
fn instantiate_monomorph(
&self,
generic_values: &[GenericArgument],
library: &Library,
out: &mut Monomorphs,
) {
let mappings = self.generic_params.call(self.path.name(), generic_values);
let mangled_path = mangle::mangle_path(
&self.path,
generic_values,
&library.get_config().export.mangle,
);
let monomorph = Typedef::new(
mangled_path,
GenericParams::default(),
self.aliased.specialize(&mappings),
self.cfg.clone(),
self.annotations.clone(),
self.documentation.clone(),
);
out.insert_typedef(library, self, monomorph, generic_values.to_owned());
}
}
impl Source for Typedef {
fn write<F: Write>(&self, config: &Config, out: &mut SourceWriter<F>) {
let condition = self.cfg.to_condition(config);
condition.write_before(config, out);
self.documentation.write(config, out);
self.generic_params.write(config, out);
match config.language {
Language::Cxx => {
write!(out, "using {} = ", self.export_name());
self.aliased.write(config, out);
}
Language::C | Language::Cython => {
write!(out, "{} ", config.language.typedef());
Field::from_name_and_type(self.export_name().to_owned(), self.aliased.clone())
.write(config, out);
}
}
out.write(";");
condition.write_after(config, out);
}
}
|
