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webidl: translate webidl const to backend const

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This commit is contained in:
Julius Rakow
2018-07-13 06:04:40 +02:00
parent 862e4c50f6
commit e35129445d
2 changed files with 59 additions and 5 deletions
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35
crates/webidl/src/lib.rs
View File

@ -29,12 +29,12 @@ use std::path::Path;
use backend::defined::{ImportedTypeDefinitions, RemoveUndefinedImports};
use backend::util::{ident_ty, rust_ident, wrap_import_function};
use failure::ResultExt;
use heck::CamelCase;
use heck::{CamelCase, ShoutySnakeCase};
use quote::ToTokens;
use util::{
create_basic_method, create_function, create_getter, create_setter, webidl_ty_to_syn_ty,
TypePosition,
create_basic_method, create_function, create_getter, create_setter, webidl_const_ty_to_syn_ty,
webidl_const_v_to_backend_const_v, webidl_ty_to_syn_ty, TypePosition,
};
/// Either `Ok(t)` or `Err(failure::Error)`.
@ -297,9 +297,9 @@ impl<'a> WebidlParse<&'a str> for webidl::ast::InterfaceMember {
attr.webidl_parse(program, self_name)
}
webidl::ast::InterfaceMember::Operation(ref op) => op.webidl_parse(program, self_name),
webidl::ast::InterfaceMember::Const(ref c) => c.webidl_parse(program, self_name),
// TODO
webidl::ast::InterfaceMember::Const(_)
| webidl::ast::InterfaceMember::Iterable(_)
webidl::ast::InterfaceMember::Iterable(_)
| webidl::ast::InterfaceMember::Maplike(_)
| webidl::ast::InterfaceMember::Setlike(_) => {
warn!("Unsupported WebIDL interface member: {:?}", self);
@ -474,3 +474,28 @@ impl<'a> WebidlParse<()> for webidl::ast::Enum {
Ok(())
}
}
impl<'a> WebidlParse<&'a str> for webidl::ast::Const {
fn webidl_parse(
&self,
program: &mut backend::ast::Program,
interface_name: &'a str,
) -> Result<()> {
let syn_ty = webidl_const_ty_to_syn_ty(&self.type_);
program.imports.push(backend::ast::Import {
module: None,
version: None,
js_namespace: None,
kind: backend::ast::ImportKind::Const(backend::ast::Const {
vis: syn::Visibility::Public(syn::VisPublic {
pub_token: Default::default(),
}),
name: rust_ident(self.name.to_shouty_snake_case().as_str()),
interface_name: rust_ident(interface_name),
ty: syn_ty,
value: webidl_const_v_to_backend_const_v(&self.value),
}),
});
Ok(())
}
}

29
crates/webidl/src/util.rs
View File

@ -90,6 +90,35 @@ pub fn webidl_ty_to_syn_ty(ty: &webidl::ast::Type, pos: TypePosition) -> Option<
})
}
pub fn webidl_const_ty_to_syn_ty(ty: &webidl::ast::ConstType) -> syn::Type {
use webidl::ast::ConstType::*;
// similar to webidl_ty_to_syn_ty
match ty {
Boolean => ident_ty(raw_ident("bool")),
Byte => ident_ty(raw_ident("i8")),
Octet => ident_ty(raw_ident("u8")),
RestrictedDouble | UnrestrictedDouble => ident_ty(raw_ident("f64")),
RestrictedFloat | UnrestrictedFloat => ident_ty(raw_ident("f32")),
SignedLong => ident_ty(raw_ident("i32")),
SignedLongLong => ident_ty(raw_ident("i64")),
SignedShort => ident_ty(raw_ident("i16")),
UnsignedLong => ident_ty(raw_ident("u32")),
UnsignedLongLong => ident_ty(raw_ident("u64")),
UnsignedShort => ident_ty(raw_ident("u16")),
Identifier(ref id) => ident_ty(rust_ident(id)),
}
}
pub fn webidl_const_v_to_backend_const_v(v: &webidl::ast::ConstValue) -> backend::ast::ConstValue {
match *v {
webidl::ast::ConstValue::BooleanLiteral(b) => backend::ast::ConstValue::BooleanLiteral(b),
webidl::ast::ConstValue::FloatLiteral(f) => backend::ast::ConstValue::FloatLiteral(f),
webidl::ast::ConstValue::IntegerLiteral(i) => backend::ast::ConstValue::IntegerLiteral(i),
webidl::ast::ConstValue::Null => backend::ast::ConstValue::Null,
}
}
fn simple_fn_arg(ident: Ident, ty: syn::Type) -> syn::ArgCaptured {
syn::ArgCaptured {
pat: syn::Pat::Ident(syn::PatIdent {