Am 18.09.2017 um 11:50 schrieb Dominique d'Humières:
Warning: Conversion from 'REAL(4)' to 'REAL(8)' at (1) [-Wconversion-extra]
Not me (not in the general case)
even if may allow to detect things such as ‘pi8=acos(-1.0)’?
This one would be interesting to catch (even with -Wall), although it would be hard to avoid false positives. I agree with Dominique that enabling -Wconversion-extra the way it is now would be too noisy. Are there warnings currently enabled with -Wconversion-extra which would be useful in -Wextra (or even ones currently not in -Wconversion-extra) without having too many false positives? r8 = 1./3. could be one example, r8=acos(-1.0) another. Something like "it must have been calculated with a formula and, if evaluated in the precision of the lhs, gives a different result from the one if the user had specified it with the correct precision". We don't do that yet, but I think it could be useful even with -Wall, and certainly with -Wextra. What do you think?
