Test pattern macros

This commit is contained in:
Keegan McAllister 2014-05-19 15:14:23 -07:00
parent 55776f2822
commit fd40d0cf5b
3 changed files with 101 additions and 0 deletions

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@ -22,8 +22,16 @@ macro_rules! ignored_expr {
() => ( 1, 2 ) //~ ERROR macro expansion ignores token `,`
}
macro_rules! ignored_pat {
() => ( 1, 2 ) //~ ERROR macro expansion ignores token `,`
}
ignored_item!()
fn main() {
ignored_expr!()
match 1 {
ignored_pat!() => (),
_ => (),
}
}

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@ -0,0 +1,18 @@
// Copyright 2014 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.
#![feature(macro_rules)]
macro_rules! foo ( () => ( x ) )
fn main() {
let foo!() = 2;
x + 1; //~ ERROR unresolved name `x`
}

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@ -0,0 +1,75 @@
// Copyright 2012-2014 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.
#![feature(macro_rules)]
macro_rules! mypat(
() => (
Some('y')
)
)
macro_rules! char_x(
() => (
'x'
)
)
macro_rules! some(
($x:pat) => (
Some($x)
)
)
macro_rules! indirect(
() => (
some!(char_x!())
)
)
macro_rules! ident_pat(
($x:ident) => (
$x
)
)
fn f(c: Option<char>) -> uint {
match c {
Some('x') => 1,
mypat!() => 2,
_ => 3,
}
}
pub fn main() {
assert_eq!(1, f(Some('x')));
assert_eq!(2, f(Some('y')));
assert_eq!(3, f(None));
assert_eq!(1, match Some('x') {
Some(char_x!()) => 1,
_ => 2,
});
assert_eq!(1, match Some('x') {
some!(char_x!()) => 1,
_ => 2,
});
assert_eq!(1, match Some('x') {
indirect!() => 1,
_ => 2,
});
assert_eq!(3, {
let ident_pat!(x) = 2;
x+1
});
}