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builtins: Remove old incorrect comment about isSmallStr and add a test to make sure

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Brian Carroll 2022-09-02 23:18:34 +01:00
parent bfc00a4b94
commit 32b815847e
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1 changed files with 4 additions and 1 deletions
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crates/compiler/builtins/bitcode/src/str.zig
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@ -215,11 +215,14 @@ pub const RocStr = extern struct {
return result; return result;
} }
// NOTE: returns false for empty string!
pub fn isSmallStr(self: RocStr) bool { pub fn isSmallStr(self: RocStr) bool {
return @bitCast(isize, self.str_capacity) < 0; return @bitCast(isize, self.str_capacity) < 0;
} }
test "isSmallStr: returns true for empty string" {
try expect(isSmallStr(RocStr.empty()));
}
fn asArray(self: RocStr) [@sizeOf(RocStr)]u8 { fn asArray(self: RocStr) [@sizeOf(RocStr)]u8 {
const as_ptr = @ptrCast([*]const u8, &self); const as_ptr = @ptrCast([*]const u8, &self);
const slice = as_ptr[0..@sizeOf(RocStr)]; const slice = as_ptr[0..@sizeOf(RocStr)];