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-rw-r--r--components/malloc_size_of_derive/lib.rs125
1 files changed, 0 insertions, 125 deletions
diff --git a/components/malloc_size_of_derive/lib.rs b/components/malloc_size_of_derive/lib.rs
deleted file mode 100644
index 0838f6cfb7f..00000000000
--- a/components/malloc_size_of_derive/lib.rs
+++ /dev/null
@@ -1,125 +0,0 @@
-// Copyright 2016-2017 The Servo Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! A crate for deriving the MallocSizeOf trait.
-
-extern crate proc_macro2;
-#[macro_use]
-extern crate syn;
-#[macro_use]
-extern crate synstructure;
-
-#[cfg(not(test))]
-decl_derive!([MallocSizeOf, attributes(ignore_malloc_size_of)] => malloc_size_of_derive);
-
-fn malloc_size_of_derive(s: synstructure::Structure) -> proc_macro2::TokenStream {
- let match_body = s.each(|binding| {
- let ignore = binding
- .ast()
- .attrs
- .iter()
- .any(|attr| match attr.interpret_meta().unwrap() {
- syn::Meta::Word(ref ident) | syn::Meta::List(syn::MetaList { ref ident, .. })
- if ident == "ignore_malloc_size_of" =>
- {
- panic!(
- "#[ignore_malloc_size_of] should have an explanation, \
- e.g. #[ignore_malloc_size_of = \"because reasons\"]"
- );
- }
- syn::Meta::NameValue(syn::MetaNameValue { ref ident, .. })
- if ident == "ignore_malloc_size_of" =>
- {
- true
- },
- _ => false,
- });
- if ignore {
- None
- } else if let syn::Type::Array(..) = binding.ast().ty {
- Some(quote! {
- for item in #binding.iter() {
- sum += ::malloc_size_of::MallocSizeOf::size_of(item, ops);
- }
- })
- } else {
- Some(quote! {
- sum += ::malloc_size_of::MallocSizeOf::size_of(#binding, ops);
- })
- }
- });
-
- let ast = s.ast();
- let name = &ast.ident;
- let (impl_generics, ty_generics, where_clause) = ast.generics.split_for_impl();
- let mut where_clause = where_clause.unwrap_or(&parse_quote!(where)).clone();
- for param in ast.generics.type_params() {
- let ident = &param.ident;
- where_clause
- .predicates
- .push(parse_quote!(#ident: ::malloc_size_of::MallocSizeOf));
- }
-
- let tokens = quote! {
- impl #impl_generics ::malloc_size_of::MallocSizeOf for #name #ty_generics #where_clause {
- #[inline]
- #[allow(unused_variables, unused_mut, unreachable_code)]
- fn size_of(&self, ops: &mut ::malloc_size_of::MallocSizeOfOps) -> usize {
- let mut sum = 0;
- match *self {
- #match_body
- }
- sum
- }
- }
- };
-
- tokens
-}
-
-#[test]
-fn test_struct() {
- let source = syn::parse_str(
- "struct Foo<T> { bar: Bar, baz: T, #[ignore_malloc_size_of = \"\"] z: Arc<T> }",
- )
- .unwrap();
- let source = synstructure::Structure::new(&source);
-
- let expanded = malloc_size_of_derive(source).to_string();
- let mut no_space = expanded.replace(" ", "");
- macro_rules! match_count {
- ($e: expr, $count: expr) => {
- assert_eq!(
- no_space.matches(&$e.replace(" ", "")).count(),
- $count,
- "counting occurences of {:?} in {:?} (whitespace-insensitive)",
- $e,
- expanded
- )
- };
- }
- match_count!("struct", 0);
- match_count!("ignore_malloc_size_of", 0);
- match_count!("impl<T> ::malloc_size_of::MallocSizeOf for Foo<T> where T: ::malloc_size_of::MallocSizeOf {", 1);
- match_count!("sum += ::malloc_size_of::MallocSizeOf::size_of(", 2);
-
- let source = syn::parse_str("struct Bar([Baz; 3]);").unwrap();
- let source = synstructure::Structure::new(&source);
- let expanded = malloc_size_of_derive(source).to_string();
- no_space = expanded.replace(" ", "");
- match_count!("for item in", 1);
-}
-
-#[should_panic(expected = "should have an explanation")]
-#[test]
-fn test_no_reason() {
- let input = syn::parse_str("struct A { #[ignore_malloc_size_of] b: C }").unwrap();
- malloc_size_of_derive(synstructure::Structure::new(&input));
-}