16 lines
347 B
Nim
16 lines
347 B
Nim
# Context
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#
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# Discussion with PMunch on IRC to disallow the use of some variable
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# in a code block
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template undef(symbol: untyped{nkIdent}, body: untyped{nkStmtList}): untyped =
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block:
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template `symbol`(): untyped = {.error: "Cannot use `" & astToStr(`symbol`) & "` in this undef context".}
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body
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var x = 100
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echo x
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undef(x):
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echo x
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