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29284 Discussions

Evaluation of logical expressions with mixed arguments

OP1
New Contributor III
‎07-01-2010 01:49 PM
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Hi,

Is it possible to have the compiler warn about the following situation:

...
LOGICAL :: FLAG
...
IF (FLAG == 'yes') THEN
...

In other words: the logical expression is made of a logical and a variable from another type. The compiler probably converts 'yes' into a logical (I suppose this is the same situation as having expressionswhere reals are mixed with integers or other kinds of variables, for instance).

So, is there a way to force the compiler to emit a warning in these situations? Or to prevent the compiler from converting argumentsof an expression based on the nature of the first argument?

Thanks,

Olivier
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Steven_L_Intel1
Employee
‎07-01-2010 02:25 PM
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Turning on standards checking will warn you about this. There are two things non-standard here. The first is the use of a character literal which is treated as a Hollerith constant in non-character contexts. Then there's the non-standard comparison of a logical to a numeric datatype.

There is not an option to disallow logical-numeric conversions, or one to warn speciifically about those. Both are things already on our "wish list".
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OP1
New Contributor III
‎07-01-2010 02:41 PM
407 Views

Ah, excellent, that did the trick. I am glad these are on your wish list - these programming errors can easily fly under the radar.

Thanks Steve!

Olivier

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