private static TExpression pre_claim(StringClaimer claimer)
{
return(TAssignment.Claim(claimer) ??
TIf.Claim(claimer) ??
TFor.Claim(claimer) ??
TWhile.Claim(claimer) ??
TVariable.Claim(claimer) ??
TLiteral.Claim(claimer) ??
TParenExpression.Claim(claimer) ??
TBlock.Claim(claimer) as TExpression);
}
public new static TAssignment Claim(StringClaimer claimer)
{
Claim failTo = claimer.FailPoint();
TVariable toAssign = TVariable.Claim(claimer);
if (toAssign == null)
{
failTo.Fail();
return(null);
}
TOperator newOp = TOperator.Claim(claimer);
Claim c = claimer.Claim(Set);
if (!c.Success)
{
failTo.Fail();
return(null);
}
TExpression assignValue = TExpression.Claim(claimer);
if (assignValue == null)
{
failTo.Fail();
return(null);
}
TAssignment newAssign = new TAssignment
{
_var = toAssign,
_op = newOp,
_value = assignValue
};
return(newAssign);
}