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-Wextra with unsigned template parameters
- From: Aliesha Finkel <agfinkel at yahoo dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Fri, 5 May 2006 23:31:49 -0700 (PDT)
- Subject: -Wextra with unsigned template parameters
Hi, I'm using -Wextra (-W) to compile my code, one
feature of which is throwing a warning when an
unsigned type is checked for >= 0 since it's always
true. In general I find this to be very helpful, but
it throws this error even for templates which may have
instantiations with signed types elsewhere. A code
example is included below. Does anyone know how best
to supress this warning without removing the condition
or turning off -Wextra? Thank you in advance.
template <typename T>
struct foo {
foo(T bar) { if (bar >= 0) bar = 1; }
};
foo<unsigned> baz(3);
When this code is compiled by gcc 3.3 with -W -c, it
warns that the comparison of unsigned expression >= 0
is always true.
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