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Andrew V. Teylu
56f43b5142
When a macro expands to a call whose callee is a block (or other "complete" expression like `match`, `if`, `loop`), the AST pretty printer emits the callee without parentheses. In statement position the closing brace ends the expression and the argument list is parsed as a separate tuple expression, producing a parse error.
18 lines
408 B
Rust
18 lines
408 B
Rust
#![feature(prelude_import)]
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#![no_std]
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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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//@ pretty-mode:expanded
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//@ pp-exact:block-index-paren.pp
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macro_rules! block_arr { () => {{ [0u8; 4] }}; }
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macro_rules! as_slice { () => {{ &block_arr!()[..] }}; }
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macro_rules! group { ($e:expr) => { $e }; }
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fn scope() { &({ drop })(0); }
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fn main() { let _: &[u8] = { &({ [0u8; 4] })[..] }; }
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