Test pattern macros
This commit is contained in:
parent
55776f2822
commit
fd40d0cf5b
|
@ -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!() => (),
|
||||
_ => (),
|
||||
}
|
||||
}
|
||||
|
|
|
@ -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`
|
||||
}
|
|
@ -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
|
||||
});
|
||||
}
|
Loading…
Reference in New Issue