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result variable not accepted in bool expression in parentheses #16855

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a-mr opened this issue Jan 28, 2021 · 0 comments · May be fixed by #24406
Open

result variable not accepted in bool expression in parentheses #16855

a-mr opened this issue Jan 28, 2021 · 0 comments · May be fixed by #24406

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@a-mr
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a-mr commented Jan 28, 2021

Example

proc f(): int =
  echo (result = 1; result > 0)

A more realistic example:

proc process(): int = 1

proc loop(): int =
  while true and (result = process(); result > 0):
    break

Current Output

Does not compile:

Error: expression '0 < result' is of type 'bool' and has to be used (or discarded)

Expected Output

Should compile and work like any other variable.

Additional Information

$ nim -v
Nim Compiler Version 1.5.1 [Linux: amd64]
Compiled at 2021-01-28
Copyright (c) 2006-2021 by Andreas Rumpf

git hash: fc9cf2088d8ba969115a335239d57c05fbee9ad4
active boot switches: -d:release
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disallow implicit return if result is used, don't use void context metagn/Nim
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@a-mr