src/test/ui/proc-macro/three-equals.rs

   1 // aux-build:three-equals.rs
   2
   3
   4 #![feature(proc_macro_hygiene)]
   5
   6 extern crate three_equals;
   7
   8 use three_equals::three_equals;
   9
  10 fn main() {
  11     // This one is okay.
  12     three_equals!(===);
  13
  14     // Need exactly three equals.
  15     three_equals!(==); //~ ERROR found 2 equal signs, need exactly 3
  16
  17     // Need exactly three equals.
  18     three_equals!(=====); //~ ERROR expected EOF
  19
  20     // Only equals accepted.
  21     three_equals!(abc); //~ ERROR expected `=`
  22
  23     // Only equals accepted.
  24     three_equals!(!!); //~ ERROR expected `=`
  25
  26     // Only three characters expected.
  27     three_equals!(===a); //~ ERROR expected EOF
  28 }