197bc6cb66
This PR redefines `String` to be the type of byte arrays `b` for which `b.IsValidUtf8`. This moves the data model of strings much closer to the actual data representation at runtime. In the near future, we will - provide variants of `String.Pos` and `Substring` that only allow for valid positions - redefine all `String` functions to be much closer to their C++ implementations In the near-to-medium future we will then provide comprehensive verification of `String` based on these refactors.
18 lines
712 B
Text
18 lines
712 B
Text
setLit.lean:22:19-22:21: error: overloaded, errors
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failed to synthesize
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EmptyCollection String
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Hint: Additional diagnostic information may be available using the `set_option diagnostics true` command.
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Fields missing: `bytes`, `isValidUtf8`
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Hint: Add missing fields:
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̲b̲y̲t̲e̲s̲ ̲:̲=̲ ̲_̲
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̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲i̲s̲V̲a̲l̲i̲d̲U̲t̲f̲8̲ ̲:̲=̲ ̲_̲ ̲
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setLit.lean:24:31-24:38: error: overloaded, errors
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failed to synthesize
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Singleton Nat String
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Hint: Additional diagnostic information may be available using the `set_option diagnostics true` command.
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24:33 `val` is not a field of structure `String`
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