[−][src]Macro tt_call::tt_return
Return zero or more output values to the caller macro.
Input
The tt_return!
invocation should be given a $caller
to return to and a
sequence of zero or more named return values.
$(
arbitrary key= [{
arbitrary tokens}]
)*
Example
use tt_call::{tt_call, tt_return}; macro_rules! is_lowercase_self { // Input token is `self`. { $caller:tt input = [{ self }] } => { tt_return! { $caller is = [{ true }] } }; // Input token is anything other than `self`. { $caller:tt input = [{ $other:tt }] } => { tt_return! { $caller is = [{ false }] } }; } fn main() { let is = tt_call! { macro = [{ is_lowercase_self }] input = [{ self }] }; println!("{}", is); }