Fix issue with comparison of string constants #6065
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String constants were compare literally, as part of constant propagation. This means that for example `"\a" == "a"` was compiled to `false` even though the two represent the same strings. Unicode and hex escape codes are other examples where literal comparison is not correct. Implemented a 3-way string comparison: equality returns Some(true), Some(false), or None where the result is not determined.
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String constants were compare literally, as part of constant propagation. This means that for example
"\a" == "a"was compiled tofalseeven though the two represent the same strings. Unicode and hex escape codes are other examples where literal comparison is not correct.Implemented a 3-way string comparison: equality returns Some(true), Some(false), or None where the result is not determined.