diff options
Diffstat (limited to 'src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut.rs')
-rw-r--r-- | src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut.rs b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut.rs new file mode 100644 index 000000000..73f488a4f --- /dev/null +++ b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-calling-fnmut.rs @@ -0,0 +1,19 @@ +// run-pass +// Test that we are able to infer a suitable kind for this closure +// that is just called (`FnMut`). + +fn main() { + let mut counter = 0; + + { + // Here this must be inferred to FnMut so that it can mutate counter: + let mut tick1 = || counter += 1; + + // In turn, tick2 must be inferred to FnMut so that it can call tick1: + let mut tick2 = || { tick1(); tick1(); }; + + tick2(); + } + + assert_eq!(counter, 2); +} |