while_expected_bool_got_optional.zig « compile_errors « cases « test - zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software. https://ziglang.org

General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software. https://ziglang.org

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export fn foo() void {
    while (bar()) {}
}
fn bar() ?i32 {
    return 1;
}

// error
//
// :2:15: error: expected type 'bool', found '?i32'