1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
// Copyright 2015 Brendan Zabarauskas and the gl-rs developers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use super::{NamedType, Registry};
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Type {
pub kind: TypeKind,
/// Optional types are the default in WebIDL, so we give this a special
/// place in the `Type` reference. It's also convenient to be able to
/// "squash" optional flags to avoid `Option<Option<T>>`.
pub optional: bool,
}
/// The different kinds of primitive types supported by WebIDL
/// These are named according to their equivalents in rust.
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum Primitive {
Bool,
I8,
U8,
I16,
U16,
I32,
U32,
I64,
U64,
F32,
F64,
}
/// The definition of a type
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum TypeKind {
// Primitive types
Primitive(Primitive),
// "Known" types, that may deserve special handling
String,
ArrayBuffer,
ArrayBufferView,
BufferSource,
CanvasElement,
// Collection types
TypedArray(Primitive),
Sequence(Box<Type>),
Union(Vec<Type>),
// Named types
Named(String),
// Misc. types
Any,
Object,
}
impl Type {
/// Return an optional version of this type reference.
/// Returns an identical copy if the type is already optional.
pub fn optional(&self) -> Self {
Type {
kind: self.kind.clone(),
optional: true,
}
}
}
impl<'a> From<&'a str> for Type {
/// Construct a type reference from a name
fn from(s: &'a str) -> Type {
Type {
kind: TypeKind::Named(s.into()),
optional: false,
}
}
}
impl Primitive {
/// Get the rust name for a primitive type
pub fn name(self) -> &'static str {
use self::Primitive::*;
match self {
Bool => "bool",
I8 => "i8",
U8 => "u8",
I16 => "i16",
U16 => "u16",
I32 => "i32",
U32 => "u32",
I64 => "i64",
U64 => "u64",
F32 => "f32",
F64 => "f64",
}
}
}
impl TypeKind {
/// Look through type aliases to find the "real" definition of a type.
/// Also returns the "original name" if applicable.
pub fn flatten<'a>(&'a self, registry: &'a Registry) -> (Option<&'a str>, &'a TypeKind) {
match self {
&TypeKind::Primitive(ref p) => (Some(p.name()), self),
&TypeKind::Named(ref s) => {
if let &NamedType::Typedef(ref t) = registry.resolve_type(s) {
if !t.optional {
return (Some(s.as_str()), t.kind.flatten(registry).1);
}
}
(Some(s.as_str()), self)
},
_ => (None, self),
}
}
}