a5ad4c3794
has a unique id. Fixes numerous bugs in macro expansion and deriving. Add two representative tests. Fixes #7971 Fixes #6304 Fixes #8367 Fixes #8754 Fixes #8852 Fixes #2543 Fixes #7654
56 lines
1.7 KiB
Rust
56 lines
1.7 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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use ast;
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use codemap::Span;
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use ext::base::*;
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use ext::base;
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use opt_vec;
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use parse::token;
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use parse::token::{str_to_ident};
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pub fn expand_syntax_ext(cx: @ExtCtxt, sp: Span, tts: &[ast::token_tree])
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-> base::MacResult {
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let mut res_str = ~"";
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for (i, e) in tts.iter().enumerate() {
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if i & 1 == 1 {
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match *e {
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ast::tt_tok(_, token::COMMA) => (),
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_ => cx.span_fatal(sp, "concat_idents! expecting comma.")
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}
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} else {
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match *e {
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ast::tt_tok(_, token::IDENT(ident,_)) => res_str.push_str(cx.str_of(ident)),
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_ => cx.span_fatal(sp, "concat_idents! requires ident args.")
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}
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}
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}
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let res = str_to_ident(res_str);
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let e = @ast::Expr {
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id: ast::DUMMY_NODE_ID,
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node: ast::ExprPath(
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ast::Path {
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span: sp,
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global: false,
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segments: ~[
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ast::PathSegment {
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identifier: res,
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lifetime: None,
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types: opt_vec::Empty,
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}
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]
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}
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),
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span: sp,
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};
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MRExpr(e)
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}
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