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acf8316e50
* bring back the semfold of nil * remove space * fix test * proc type can't be dereferenced * disallow nil dereference at compile time * changelog
78 lines
1.4 KiB
Nim
78 lines
1.4 KiB
Nim
discard """
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output: '''
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Hello World
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Hello World'''
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joinable: false
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"""
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type MyProc = proc() {.cdecl.}
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type MyProc2 = proc() {.nimcall.}
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type MyProc3 = proc() #{.closure.} is implicit
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proc testProc() = echo "Hello World"
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template reject(x) = doAssert(not compiles(x))
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proc callPointer(p: pointer) =
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# can cast to proc(){.cdecl.}
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let ffunc0 = cast[MyProc](p)
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# can cast to proc(){.nimcall.}
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let ffunc1 = cast[MyProc2](p)
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# cannot cast to proc(){.closure.}
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reject: cast[MyProc3](p)
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ffunc0()
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ffunc1()
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callPointer(cast[pointer](testProc))
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reject: discard cast[enum](0)
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proc a = echo "hi"
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reject: discard cast[ptr](a)
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# bug #15623
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block:
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if false:
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let x = cast[ptr int](nil)
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echo x[]
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block:
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if false:
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var x: ref int = nil
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echo cast[ptr int](x)[]
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block:
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doAssert cast[int](cast[ptr int](nil)) == 0
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block:
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var x: ref int = nil
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doAssert cast[int](cast[ptr int](x)) == 0
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block:
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block:
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static:
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let a = cast[pointer](nil)
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doAssert a.repr == "nil"
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block:
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static:
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doAssert cast[ptr int](nil).repr == "nil"
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block:
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const str = cast[ptr int](nil)
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static:
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doAssert str.repr == "nil"
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block:
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static:
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doAssert cast[ptr int](nil).repr == "nil"
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block:
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static:
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doAssert cast[RootRef](nil).repr == "nil"
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# Issue #15730, not fixed yet
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# block:
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# static:
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# doAssert cast[cstring](nil).repr == "nil"
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