9e3d0b002a
This breaks a fair amount of code. The typical patterns are:
* `for _ in range(0, 10)`: change to `for _ in range(0u, 10)`;
* `println!("{}", 3)`: change to `println!("{}", 3i)`;
* `[1, 2, 3].len()`: change to `[1i, 2, 3].len()`.
RFC #30. Closes #6023.
[breaking-change]
45 lines
1.1 KiB
Rust
45 lines
1.1 KiB
Rust
// Copyright 2012-2014 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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// ignore-pretty - token trees can't pretty print
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#![feature(macro_rules)]
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macro_rules! myfn(
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( $f:ident, ( $( $x:ident ),* ), $body:block ) => (
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fn $f( $( $x : int),* ) -> int $body
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)
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)
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myfn!(add, (a,b), { return a+b; } )
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pub fn main() {
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macro_rules! mylet(
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($x:ident, $val:expr) => (
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let $x = $val;
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)
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);
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mylet!(y, 8i*2);
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assert_eq!(y, 16i);
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myfn!(mult, (a,b), { a*b } );
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assert_eq!(mult(2, add(4,4)), 16);
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macro_rules! actually_an_expr_macro (
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() => ( 16i )
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)
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assert_eq!({ actually_an_expr_macro!() }, 16i);
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}
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