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Lukas Bergdoll
506762f3ff
Currently all core and std macros are automatically added to the prelude via #[macro_use]. However a situation arose where we want to add a new macro `assert_matches` but don't want to pull it into the standard prelude for compatibility reasons. By explicitly exporting the macros found in the core and std crates we get to decide on a per macro basis and can later add them via the rust_20xx preludes.
34 lines
671 B
Rust
34 lines
671 B
Rust
#![feature(prelude_import)]
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#![no_std]
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#![feature(postfix_match)]
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extern crate std;
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#[prelude_import]
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use ::std::prelude::rust_2015::*;
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use std::ops::Add;
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//@ pretty-mode:expanded
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//@ pp-exact:precedence.pp
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macro_rules! repro { ($e:expr) => { $e.match { _ => {} } }; }
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struct Struct {}
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impl Add<Struct> for usize {
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type Output = ();
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fn add(self, _: Struct) -> () { () }
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}
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pub fn main() {
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let a;
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(
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{ 1 } + 1).match {
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_ => {}
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};
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(4 as usize).match { _ => {} };
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return.match { _ => {} };
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(a = 42).match { _ => {} };
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(|| {}).match { _ => {} };
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(42..101).match { _ => {} };
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(1 + Struct {}).match { _ => {} };
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}
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