static BinaryOperator()
{
// IsNull, IsFalse, IsTrue
var op1 = new BinaryOperator
{
_branchWriter = (w, l) => w.Emit(OpCodes.Brtrue, l),
_compareWriter = w => { },
ArgumentCount = 1
};
var op2 = new BinaryOperator
{
_branchWriter = (w, l) => w.Emit(OpCodes.Brfalse, l),
_compareWriter = w => w.Emit(OpCodes.Not),
ArgumentCount = 1
};
SetOpposites(op1, op2);
IsTrue = op1;
IsFalse = IsNull = op2;
// AreEqual, AreNotEqual
op1 = new BinaryOperator
{
_branchWriter = (wde, l) => wde.Emit(OpCodes.Beq, l),
_compareWriter = w => w.Emit(OpCodes.Ceq),
ArgumentCount = 2
};
op2 = new BinaryOperator
{
_branchWriter = (wde, l) => wde.Emit(OpCodes.Bne_Un, l),
_compareWriter = w => { w.Emit(OpCodes.Ceq); w.Emit(OpCodes.Not); },
ArgumentCount = 2
};
SetOpposites(op1, op2);
AreEqual = op1;
AreNotEqual = op2;
// GreaterThan, LessThanOrEqualTo
op1 = new BinaryOperator
{
_branchWriter = (wde, l) => wde.Emit(OpCodes.Bgt, l),
_compareWriter = w => w.Emit(OpCodes.Cgt),
ArgumentCount = 2
};
op2 = new BinaryOperator
{
_branchWriter = (wde, l) => wde.Emit(OpCodes.Ble, l),
_compareWriter = w => w.Emit(OpCodes.Clt),
ArgumentCount = 2
};
SetOpposites(op1, op2);
GreaterThan = op1;
LessThanOrEqualTo = op2;
// GreaterThanOrEqualTo, LessThan
op1 = new BinaryOperator
{
_branchWriter = (wde, l) => wde.Emit(OpCodes.Bge, l),
_compareWriter = w => { w.Emit(OpCodes.Clt); w.Emit(OpCodes.Not); },
ArgumentCount = 2
};
op2 = new BinaryOperator
{
_branchWriter = (wde, l) => wde.Emit(OpCodes.Blt, l),
_compareWriter = w => { w.Emit(OpCodes.Cgt); w.Emit(OpCodes.Not); },
ArgumentCount = 2
};
SetOpposites(op1, op2);
GreaterThanOrEqualTo = op1;
LessThan = op2;
}
private static void SetOpposites(BinaryOperator op1, BinaryOperator op2)
{
op1._opposite = op2;
op2._opposite = op1;
}