leo/tests/compiler/function/value_unchanged.leo
2021-07-01 13:40:29 -07:00

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/*
namespace: Compile
expectation: Pass
input_file: input/dummy.in
*/
// Functions input in leo are pass-by-value.
//
// Program execution:
// line 15: variable `a` is defined with value `1`.
// line 16: value `1` is copied and passed into function `bad_mutate()`.
// line 10: variable `x` is defined with value `1`.
// line 11: variable `x` is set to value `0`.
// line 18: program returns the value of `a`.
function bad_mutate(x: u32) {
x = 0; // <- does not change `a`
}
function main(y: bool) -> bool {
const a = 1u32;
bad_mutate(a);
return (a == 1u32) == y; // <- value `a` is still `1u32`
}