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5e55e16ad8
fixes #24041 `when` statements in generic object types normally just leave their conditions as expressions and still typecheck their branch bodies. Instead of this, when the condition can be evaluated as a constant as well as the ones before it and it resolves to `true`, it now uses the body of that branch without typechecking the remaining ones.
47 lines
1014 B
Nim
47 lines
1014 B
Nim
discard """
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targets: "c js"
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"""
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block: # issue #24041
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type ArrayBuf[N: static int, T = byte] = object
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when sizeof(int) > sizeof(uint8):
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when N <= int(uint8.high):
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n: uint8
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else:
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when sizeof(int) > sizeof(uint16):
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when N <= int(uint16.high):
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n: uint16
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else:
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when sizeof(int) > sizeof(uint32):
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when N <= int(uint32.high):
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n: uint32
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else:
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n: int
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else:
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n: int
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else:
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n: int
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else:
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n: int
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var x: ArrayBuf[8]
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doAssert x.n is uint8
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when sizeof(int) > sizeof(uint32):
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var y: ArrayBuf[int(uint32.high) * 8]
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doAssert y.n is int
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block: # constant condition after dynamic one
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type Foo[T] = object
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when T is int:
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a: int
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elif true:
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a: string
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else:
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a: bool
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var x: Foo[string]
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doAssert x.a is string
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var y: Foo[int]
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doAssert y.a is int
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var z: Foo[float]
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doAssert z.a is string
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