Macro futures_await_synom::cond_reduce
[−]
[src]
macro_rules! cond_reduce { ($i:expr, $cond:expr, $submac:ident!( $($args:tt)* )) => { ... }; ($i:expr, $cond:expr, $f:expr) => { ... }; }
Fail to parse if condition is false, otherwise parse the given parser.
This is typically used inside of option!
or alt!
.
- Syntax:
cond_reduce!(CONDITION, THING)
- Output:
THING