cc760a647a
This does a number of things, but especially dramatically reduce the number of allocations performed for operations involving attributes/ meta items: - Converts ast::meta_item & ast::attribute and other associated enums to CamelCase. - Converts several standalone functions in syntax::attr into methods, defined on two traits AttrMetaMethods & AttributeMethods. The former is common to both MetaItem and Attribute since the latter is a thin wrapper around the former. - Deletes functions that are unnecessary due to iterators. - Converts other standalone functions to use iterators and the generic AttrMetaMethods rather than allocating a lot of new vectors (e.g. the old code would have to allocate a new vector to use functions that operated on &[meta_item] on &[attribute].) - Moves the core algorithm of the #[cfg] matching to syntax::attr, similar to find_inline_attr and find_linkage_metas. This doesn't have much of an effect on the speed of #[cfg] stripping, despite hugely reducing the number of allocations performed; presumably most of the time is spent in the ast folder rather than doing attribute checks. Also fixes the Eq instance of MetaItem_ to correctly ignore spaces, so that `rustc --cfg 'foo(bar)'` now works.
36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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/// Deprecated #[auto_encode] and #[auto_decode] syntax extensions
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use ast;
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use codemap::span;
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use ext::base::*;
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pub fn expand_auto_encode(
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cx: @ExtCtxt,
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span: span,
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_mitem: @ast::MetaItem,
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in_items: ~[@ast::item]
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) -> ~[@ast::item] {
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cx.span_err(span, "`#[auto_encode]` is deprecated, use `#[deriving(Encodable)]` instead");
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in_items
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}
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pub fn expand_auto_decode(
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cx: @ExtCtxt,
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span: span,
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_mitem: @ast::MetaItem,
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in_items: ~[@ast::item]
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) -> ~[@ast::item] {
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cx.span_err(span, "`#[auto_decode]` is deprecated, use `#[deriving(Decodable)]` instead");
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in_items
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}
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