RFA: PATCH: -Wimplicit-double

[Mark Mitchell]

On 9/3/2010 10:43 AM, Manuel López-Ibáñez wrote:

>>> This patch implements -Wimplicit-double, a new warning.  The goal of
>>> the warning is to warn users when a "float" is implicitly converted to
>>> a "double".

> This is warned already by Wconversion for both C and C++ and Fortran!

The fact that there's another warning option which warns about the same
code is irrelevant.  -Wconversion and -Wtraditional-conversion are
warning about something entirely different, from the user's perspective.

For example, -Wconversion warns about conversions that alter a value.
That's not the point here; this is about a value being altered, it's
about using a type that your hardware doesn't support natively.  It's
entirely possible that a user doesn't want all the warnings that would
come from -Wconversion or -Wtraditional-conversion, but does want this
class of warnings.

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713