diff options
Diffstat (limited to 'src/libsyntax/ext/bytes.rs')
| -rw-r--r-- | src/libsyntax/ext/bytes.rs | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/src/libsyntax/ext/bytes.rs b/src/libsyntax/ext/bytes.rs deleted file mode 100644 index 9f225d55b44..00000000000 --- a/src/libsyntax/ext/bytes.rs +++ /dev/null @@ -1,117 +0,0 @@ -// Copyright 2013 The Rust Project Developers. See the COPYRIGHT -// file at the top-level directory of this distribution and at -// http://rust-lang.org/COPYRIGHT. -// -// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or -// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license -// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -/* The compiler code necessary to support the bytes! extension. */ - -use ast; -use codemap::Span; -use ext::base::*; -use ext::base; -use ext::build::AstBuilder; -use std::ascii::AsciiExt; - -pub fn expand_syntax_ext<'cx>(cx: &'cx mut ExtCtxt, - sp: Span, - tts: &[ast::TokenTree]) - -> Box<base::MacResult+'cx> { - cx.span_warn(sp, "`bytes!` is deprecated, use `b\"foo\"` literals instead"); - cx.parse_sess.span_diagnostic.span_help(sp, - "see http://doc.rust-lang.org/reference.html#byte-and-byte-string-literals \ - for documentation"); - cx.parse_sess.span_diagnostic.span_help(sp, - "see https://github.com/rust-lang/rust/blob/master/src/etc/2014-06-rewrite-bytes-macros.py \ - for an automated migration"); - - // Gather all argument expressions - let exprs = match get_exprs_from_tts(cx, sp, tts) { - None => return DummyResult::expr(sp), - Some(e) => e, - }; - let mut bytes = Vec::new(); - let mut err = false; - - for expr in exprs.iter() { - match expr.node { - // expression is a literal - ast::ExprLit(ref lit) => match lit.node { - // string literal, push each byte to vector expression - ast::LitStr(ref s, _) => { - for byte in s.get().bytes() { - bytes.push(cx.expr_u8(expr.span, byte)); - } - } - - // u8 literal, push to vector expression - ast::LitInt(v, ast::UnsignedIntLit(ast::TyU8)) => { - if v > 0xFF { - cx.span_err(expr.span, "too large u8 literal in bytes!"); - err = true; - } else { - bytes.push(cx.expr_u8(expr.span, v as u8)); - } - } - - // integer literal, push to vector expression - ast::LitInt(_, ast::UnsuffixedIntLit(ast::Minus)) => { - cx.span_err(expr.span, "negative integer literal in bytes!"); - err = true; - } - ast::LitInt(v, ast::UnsuffixedIntLit(ast::Plus)) => { - if v > 0xFF { - cx.span_err(expr.span, "too large integer literal in bytes!"); - err = true; - } else { - bytes.push(cx.expr_u8(expr.span, v as u8)); - } - } - - // char literal, push to vector expression - ast::LitChar(v) => { - if v.is_ascii() { - bytes.push(cx.expr_u8(expr.span, v as u8)); - } else { - cx.span_err(expr.span, "non-ascii char literal in bytes!"); - err = true; - } - } - - _ => { - cx.span_err(expr.span, "unsupported literal in bytes!"); - err = true; - } - }, - - _ => { - cx.span_err(expr.span, "non-literal in bytes!"); - err = true; - } - } - } - - // For some reason using quote_expr!() here aborts if we threw an error. - // I'm assuming that the end of the recursive parse tricks the compiler - // into thinking this is a good time to stop. But we'd rather keep going. - if err { - // Since the compiler will stop after the macro expansion phase anyway, we - // don't need type info, so we can just return a DummyResult - return DummyResult::expr(sp); - } - - let len = bytes.len(); - let e = cx.expr_vec(sp, bytes); - let ty = cx.ty(sp, ast::TyFixedLengthVec(cx.ty_ident(sp, cx.ident_of("u8")), - cx.expr_uint(sp, len))); - let item = cx.item_static(sp, cx.ident_of("BYTES"), ty, ast::MutImmutable, e); - let ret = cx.expr_ident(sp, cx.ident_of("BYTES")); - let ret = cx.expr_addr_of(sp, ret); - let e = cx.expr_block(cx.block(sp, vec![cx.stmt_item(sp, item)], - Some(ret))); - MacExpr::new(e) -} |
