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15 lines
801 B
Text
15 lines
801 B
Text
For type `bool`, values other than 0 or 1 are not `@safe`
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The spec [was updated](https://dlang.org/spec/type.html#bool)
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(for 2.109) so that only 0 and 1 are
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[safe values](https://dlang.org/spec/function.html#safe-values)
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for `bool`. This means that reading a `bool` value whose underlying byte representation
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has other bits set is implementation-defined and should be avoided.
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Consequently the following are deprecated in `@safe` code:
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* initialization of `bool` variables with `= void` (since 2.109)
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* Reading a `bool` field from a union (since 2.109)
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* Runtime casting a dynamic array to a `bool` dynamic array type
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* Runtime casting a `bool` dynamic array to a tail mutable dynamic array type
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* Casting a pointer to a `bool` pointer type
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* Casting a `bool` pointer to a tail mutable pointer type
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