Accumulator_& operator()(double more)
{
if (auto d = CoerceDouble(*val_))
Set(+d + more);
else
THROW("Accumulate(double) failed");
return *this;
}
// still inside struct Accumulator_
// various operator() implementations provide a de facto multimethod
Accumulator_& operator()(int more)
{
if (auto i = CoerceInt(*val_))
Set(+i + more);
else if (auto d = CoerceDouble(*val_))
Set(+d + more);
else
THROW("Accumulate(int) failed");
return *this;
}
static bool
JSValToMatrixElts(JSContext* cx, const jsval& val,
double* (&elts)[N], nsresult* rv)
{
JSObject* obj;
jsuint length;
if (JSVAL_IS_PRIMITIVE(val) ||
!(obj = JSVAL_TO_OBJECT(val)) ||
!JS_GetArrayLength(cx, obj, &length) ||
N != length) {
// Not an array-like thing or wrong size
*rv = NS_ERROR_INVALID_ARG;
return false;
}
for (PRUint32 i = 0; i < N; ++i) {
jsval elt;
double d;
if (!JS_GetElement(cx, obj, i, &elt)) {
*rv = NS_ERROR_FAILURE;
return false;
}
if (!CoerceDouble(elt, &d)) {
*rv = NS_ERROR_INVALID_ARG;
return false;
}
if (!FloatValidate(d)) {
// This is weird, but it's the behavior of SetTransform()
*rv = NS_OK;
return false;
}
*elts[i] = d;
}
*rv = NS_OK;
return true;
}
