Hi John, I get no warnings whatsoever for this code with gcc 4.3.1 on an OpenSUSE 11 / 64 bit box. Best, Ruediger John Maddock wrote:
Folks I have a large amount of code that generates warnings of the kind:
t.cpp:6: warning: shadowing built-in function `double std::acos(double)'
Actually many thousands of these warnings when building with g++ -Wshadow :-(
Normally I would just fix the code, but in this case I don't see how, I have code that looks like:
#include <cmath>
template <class T> T f(T v) { // We want acos found via ADL in case T is a class type: using std::acos; return acos(v); }
int main() { f(2.0); return 0; }
Which just on it's own produces:
$ g++ -I. -Wall -Wshadow -c t.cpp 2>&1 | less
t.cpp: In function `void f(T)': t.cpp:6: warning: shadowing built-in function `double std::acos(double)' t.cpp: In function `void f(T) [with T = double]': t.cpp:12: instantiated from here t.cpp:6: warning: shadowing built-in function `double std::acos(double)' t.cpp:12: instantiated from here
But I can't see any other way to code this... certainly using a "using namespace std;" in place of the "using std::functionname;" is *not* a valid fix (it can lead to lookup ambiguities).
Any ideas folks?
Thanks, John.
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