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/* This testcase checks whether SWIG correctly uses the new 'decltype()'
introduced in C++11.
*/
%module cpp11_decltype
%{
#if defined(_MSC_VER)
#include <iso646.h> // for alternative operator names, e.g. 'compl'
#pragma warning(disable : 4804) // warning C4804: '-': unsafe use of type 'bool' in operation
// For: decltype(-false) should_be_int2;
#endif
%}
#ifdef SWIGGO
// FIXME: SWIG/Go tries to wrap this by generating code which tries to
// assign a const char* value to a char* variable.
%ignore should_be_string;
#endif
%inline %{
class A {
public:
int i;
decltype(i) j;
auto get_number(decltype(i) a) -> decltype(i) {
if (a==5)
return 10;
else
return 0;
}
};
%}
// These are ignored as unable to deduce decltype for (&i)
%ignore B::k;
%ignore B::get_number_address;
#pragma SWIG nowarn=SWIGWARN_CPP11_DECLTYPE
%ignore hidden_global_char;
%ignore hidden_global_func;
%inline %{
#define DECLARE(VAR, VAL) decltype(VAL) VAR = VAL
static const char hidden_global_char = '\0';
void hidden_global_func() { }
class B {
public:
int i;
decltype(i) j;
decltype(i+j) ij;
decltype(&i) k;
DECLARE(a, false);
DECLARE(b, true);
// SWIG < 4.2.0 failed to perform type promotion for the result of unary
// plus and unary minus, so these would end up wrapped as bool and char.
decltype(+true) should_be_int;
decltype(-false) should_be_int2;
decltype(~'x') should_be_int3;
decltype(int(0)) should_be_int4;
decltype((int)0.0) should_be_int5;
decltype((6)-7) should_be_int6;
decltype((6)+7) should_be_int7;
decltype((6)*7) should_be_int8;
decltype((6)&7) should_be_int9;
enum e { E1 };
decltype(+E1) should_be_int10;
decltype(sizeof(i+j)) should_be_ulong;
decltype(sizeof(-i)) should_be_ulong2;
decltype(alignof(int)) should_be_ulong3;
static constexpr decltype(*"abc") should_be_char = 0;
static constexpr decltype(&hidden_global_char) should_be_string = "xyzzy";
// SWIG < 4.2.0 incorrectly used int for the result of logical not in C++
// so this would end up wrapped as int.
decltype(!0) should_be_bool;
// Test alternative operator names work in this context.
decltype(((compl 42) and (not 1)) or (2 xor 4)) should_be_bool2;
// Feature test for noexcept as an operator.
decltype(noexcept(hidden_global_func)) should_be_bool3;
decltype(E1) should_be_enum;
auto get_number_sum(decltype(i+j) a) -> decltype(i+j) {
return i+j;
}
auto get_number_address(decltype(&i) a) -> decltype(&i) {
return &i;
}
auto negate(decltype(true) b) -> decltype(b) {
return !b;
}
};
%}
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