module dmd.ShrAssignExp;

import dmd.BinExp;
import dmd.Loc;
import dmd.Expression;
import dmd.Scope;
import dmd.InterState;
import dmd.Identifier;
import dmd.IRState;
import dmd.Id;
import dmd.TOK;
import dmd.Type;

import dmd.backend.elem;
import dmd.backend.OPER;

import dmd.expression.Util;

class ShrAssignExp : BinExp
{
    this(Loc loc, Expression e1, Expression e2)
	{
		super(loc, TOK.TOKshrass, ShrAssignExp.sizeof, e1, e2);
	}
	
    Expression semantic(Scope sc)
	{
		Expression e;

		BinExp.semantic(sc);
		e2 = resolveProperties(sc, e2);

		e = op_overload(sc);
		if (e)
			return e;

		e1 = e1.modifiableLvalue(sc, e1);
		e1.checkScalar();
		e1.checkNoBool();
		type = e1.type;
		typeCombine(sc);
		e1.checkIntegral();
		e2 = e2.checkIntegral();
		e2 = e2.castTo(sc, Type.tshiftcnt);

		return this;
	}
	
    Expression interpret(InterState istate)
	{
		assert(false);
	}

    Identifier opId()    /* For operator overloading */
	{
		return Id.shrass;
	}

    elem* toElem(IRState* irs)
	{
		return toElemBin(irs, OPshrass);
	}
}