2012-12-03 18:48:01 -06:00
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// 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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2012-09-04 13:37:29 -05:00
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use base::*;
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2011-08-03 13:46:32 -05:00
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2012-12-12 19:08:09 -06:00
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fn expand_syntax_ext(cx: ext_ctxt, sp: span, tts: ~[ast::token_tree])
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-> base::mac_result {
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2012-07-18 18:18:02 -05:00
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let mut res_str = ~"";
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2012-12-12 19:08:09 -06:00
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for tts.eachi |i, e| {
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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! \
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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,_)) =>
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res_str += cx.str_of(ident),
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_ => cx.span_fatal(sp, ~"concat_idents! \
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requires ident args.")
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}
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}
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2011-08-03 13:46:32 -05:00
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}
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2012-07-18 18:18:02 -05:00
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let res = cx.parse_sess().interner.intern(@res_str);
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2011-08-03 13:46:32 -05:00
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2012-12-12 19:08:09 -06:00
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let e = @{id: cx.next_id(),
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callee_id: cx.next_id(),
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node: ast::expr_path(@{span: sp, global: false,
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idents: ~[res],
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rp: None, types: ~[]}),
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span: sp};
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mr_expr(e)
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2011-08-04 18:20:09 -05:00
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}
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