9d5d97b55d
Spring cleaning is here! In the Fall! This commit removes quite a large amount of deprecated functionality from the standard libraries. I tried to ensure that only old deprecated functionality was removed. This is removing lots and lots of deprecated features, so this is a breaking change. Please consult the deprecation messages of the deleted code to see how to migrate code forward if it still needs migration. [breaking-change]
93 lines
2.8 KiB
Rust
93 lines
2.8 KiB
Rust
// Copyright 2013-2014 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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// force-host
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#![feature(globs, plugin_registrar, macro_rules, quote)]
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extern crate syntax;
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extern crate rustc;
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use syntax::ast::{TokenTree, Item, MetaItem};
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use syntax::codemap::Span;
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use syntax::ext::base::*;
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use syntax::parse::token;
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use syntax::parse;
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use syntax::ptr::P;
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use rustc::plugin::Registry;
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#[macro_export]
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macro_rules! exported_macro (() => (2i))
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macro_rules! unexported_macro (() => (3i))
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#[plugin_registrar]
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pub fn plugin_registrar(reg: &mut Registry) {
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reg.register_macro("make_a_1", expand_make_a_1);
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reg.register_macro("forged_ident", expand_forged_ident);
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reg.register_macro("identity", expand_identity);
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reg.register_syntax_extension(
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token::intern("into_foo"),
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Modifier(box expand_into_foo));
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}
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fn expand_make_a_1(cx: &mut ExtCtxt, sp: Span, tts: &[TokenTree])
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-> Box<MacResult+'static> {
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if !tts.is_empty() {
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cx.span_fatal(sp, "make_a_1 takes no arguments");
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}
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MacExpr::new(quote_expr!(cx, 1i))
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}
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// See Issue #15750
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fn expand_identity(cx: &mut ExtCtxt, _span: Span, tts: &[TokenTree])
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-> Box<MacResult+'static> {
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// Parse an expression and emit it unchanged.
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let mut parser = parse::new_parser_from_tts(cx.parse_sess(),
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cx.cfg(), tts.to_vec());
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let expr = parser.parse_expr();
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MacExpr::new(quote_expr!(&mut *cx, $expr))
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}
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fn expand_into_foo(cx: &mut ExtCtxt, sp: Span, attr: &MetaItem, it: P<Item>)
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-> P<Item> {
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P(Item {
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attrs: it.attrs.clone(),
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..(*quote_item!(cx, enum Foo { Bar, Baz }).unwrap()).clone()
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})
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}
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fn expand_forged_ident(cx: &mut ExtCtxt, sp: Span, tts: &[TokenTree]) -> Box<MacResult+'static> {
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use syntax::ext::quote::rt::*;
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if !tts.is_empty() {
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cx.span_fatal(sp, "forged_ident takes no arguments");
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}
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// Most of this is modelled after the expansion of the `quote_expr!`
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// macro ...
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let parse_sess = cx.parse_sess();
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let cfg = cx.cfg();
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// ... except this is where we inject a forged identifier,
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// and deliberately do not call `cx.parse_tts_with_hygiene`
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// (because we are testing that this will be *rejected*
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// by the default parser).
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let expr = {
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let tt = cx.parse_tts("\x00name_2,ctxt_0\x00".to_string());
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let mut parser = new_parser_from_tts(parse_sess, cfg, tt);
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parser.parse_expr()
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};
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MacExpr::new(expr)
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}
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pub fn foo() {}
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