55 lines
1.4 KiB
Rust
55 lines
1.4 KiB
Rust
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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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/*
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* Inline assembly support.
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*/
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use core::prelude::*;
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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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pub fn expand_asm(cx: ext_ctxt, sp: span, tts: &[ast::token_tree])
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-> base::MacResult {
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let args = get_exprs_from_tts(cx, tts);
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if args.len() == 0 {
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cx.span_fatal(sp, "ast! takes at least 1 argument.");
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}
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let asm =
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expr_to_str(cx, args[0],
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~"inline assembly must be a string literal.");
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let cons = if args.len() > 1 {
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expr_to_str(cx, args[1],
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~"constraints must be a string literal.")
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} else { ~"" };
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MRExpr(@ast::expr {
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id: cx.next_id(),
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callee_id: cx.next_id(),
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node: ast::expr_inline_asm(@asm, @cons),
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span: sp
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})
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}
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//
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// Local Variables:
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// mode: rust
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// End:
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//
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