%description:
Test NaN: x!=x if x is NaN

Note: MSVC prints NaN as -1.#IND and 1.#QNAN, so we need to %subst them
to their gcc equivalent.

%global:
static bool isNaN(double d) { return d != d; }

%activity:
#define PRINT(x) EV << #x << ":" << (x) << endl;

double zero = 0;
double nan = NAN; // defined in header <cmath> since C++11

PRINT(nan);
PRINT(nan*2);
PRINT(-nan);

PRINT(isNaN(nan));
PRINT(isNaN(3.14));
PRINT(isNaN(1/zero));
PRINT(isNaN(-1/zero));

PRINT(nan==nan);
PRINT(nan!=nan);
PRINT(nan<nan);
PRINT(nan>nan);
PRINT(nan<=nan);
PRINT(nan>=nan);
EV << ".\n";

%subst: /-?1\.#IND/nan/
%subst: /-?1\.#QNAN/nan/
%subst: /-?:NaN/:nan/
%subst: /-?:\-nan/:nan/

%contains: stdout
nan:nan
nan*2:nan
-nan:nan
isNaN(nan):1
isNaN(3.14):0
isNaN(1/zero):0
isNaN(-1/zero):0
nan==nan:0
nan!=nan:1
nan<nan:0
nan>nan:0
nan<=nan:0
nan>=nan:0
.