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Make #![dom_struct] a proc_macro attribute
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[package] | ||
name = "dom_struct" | ||
version = "0.0.1" | ||
authors = ["The Servo Project Developers"] | ||
license = "MPL-2.0" | ||
publish = false | ||
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[lib] | ||
path = "lib.rs" | ||
proc-macro = true | ||
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[dependencies] | ||
quote = "0.3" |
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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/. */ | ||
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#![feature(proc_macro)] | ||
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extern crate proc_macro; | ||
#[macro_use] extern crate quote; | ||
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use proc_macro::TokenStream; | ||
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#[proc_macro_attribute] | ||
pub fn dom_struct(args: TokenStream, input: TokenStream) -> TokenStream { | ||
if !args.to_string().is_empty() { | ||
panic!("#[dom_struct] takes no arguments"); | ||
} | ||
expand_string(&input.to_string()).parse().unwrap() | ||
} | ||
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fn expand_string(input: &str) -> String { | ||
let mut tokens = quote! { | ||
#[derive(DenyPublicFields, DomObject, HeapSizeOf, JSTraceable)] | ||
#[must_root] | ||
#[repr(C)] | ||
}; | ||
tokens.append(input); | ||
tokens.to_string() | ||
} |
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