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GitHub で見る[Fortran] Replace `if (integer)` with `if (logical)`
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#38 opened on 2024年9月24日
Fortrangood first issuenew check
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説明
In Fortran there is no equivalence between logical and integer variables, so 0 is not a replacement for .false., and 1 does not replace .true.. Yet, some compilers (ifort) will happily compile if (1).
Example:
if (0) write(*, *) 'Test is false'
if (1) write(*, *) 'Test is true'
A slightly more meaningful example
integer val
val = 1
if (val) write(*, *) 'Test is true'
This should be replaced by
integer val
val = 1
if (val > 0) write(*, *) 'Test is true'