Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/warn/Wconversion-real-integer2.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* { dg-do compile } /* { dg-options "-Wconversion -ftrack-macro-expansion=2" } */ /* { dg-require-effective-target int32plus } */ // Before the fix that came with this test, we'd output an error for // the __INT_MAX__ token. That token has a BUILTINS_LOCATION // location, so the the location prefix in the warning message would // be: // <built-in>:0:0: warning: conversion to 'float' alters 'int' constant value // // Note the useless and confusing <built-in>:0:0 prefix. This is // because '__INT_MAX__' being an internal macro token, it has a // BUILTINS_LOCATION location. // // In this case, we want the error message to refer to the first // location (in the macro expansion context) that is not a location // for a built-in token. That location would be the one for where (in // real source code) the __INT_MAX__ macro has been expanded. // // That would be something like: // // gcc/testsuite/g++.dg/warn/Wconversion-real-integer2.C:21:17: warning: conversion to 'float' alters 'int' constant value // // That is more useful. #define INT_MAX __INT_MAX__ // { dg-warning "17: conversion from 'int' to 'float' changes value from .2147483647. to " } float vfloat; void h (void) { vfloat = INT_MAX; // { dg-message "14: in expansion of macro .INT_MAX." } }