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#include "parser.ih"
RuleValue &Parser::assign(RuleValue &v1, int operation, RuleValue const &v2)
{
if (d_error)
return v1;
error(v1.tag() != RuleValue::VARIABLE, "Non-lvalue in assignment");
error(
v2.tag() == RuleValue::FUNCTION,
"Function names have no values. Forgot arguments?"
);
RuleValue &value = lvalue(v1);
RuleValue const &rv2 = rvalue(v2);
switch (operation)
{
case '=':
value = rv2;
break;
case ADDA:
value += rv2;
break;
case SUBA:
value -= rv2;
break;
case MULA:
value *= rv2;
break;
case DIVA:
div0(value, rv2);
value /= rv2;
break;
case MODA:
div0(value, rv2);
integral(value, rv2);
value %= rv2;
break;
case ANDA:
integral(value, rv2);
value &= rv2;
break;
case XORA:
integral(value, rv2);
value ^= rv2;
break;
case ORA:
integral(value, rv2);
value ^= rv2;
break;
case RSHIFTA:
integral(value, rv2);
value >>= rv2;
break;
case LSHIFTA:
integral(value, rv2);
value >>= rv2;
break;
}
return v1;
}
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