public new static TParenExpression Claim(StringClaimer claimer)
{
Claim lb = claimer.Claim(LeftBracket);
if (!lb.Success)
{
return(null);
}
TParenExpression ptoken = new TParenExpression {
_realExpression = TExpression.Claim(claimer)
};
if (ptoken._realExpression == null)
{
lb.Fail();
return(null);
}
lb.Pass();
Claim rb = claimer.Claim(RightBracket);
if (rb.Success)
{
rb.Pass(); // right bracket is optional. So just pass it if we get it.
}
return(ptoken);
}
public new static TBlock Claim(StringClaimer claimer)
{
Claim c = claimer.Claim(LeftBracket);
if (!c.Success)
{
return(null);
}
c.Pass();
TBlock newBlock = new TBlock();
TExpression nExp;
while ((nExp = TExpression.Claim(claimer)) != null)
{
newBlock._expressions.Add(nExp);
claimer.Claim(SemiColon);
if (!(c = claimer.Claim(RightBracket)).Success)
{
continue;
}
c.Pass();
return(newBlock);
}
return(newBlock);
}
public new static TArgExpression Claim(StringClaimer claimer)
{
TExpression heldExpr = TExpression.Claim(claimer);
if (heldExpr == null)
{
return(null);
}
TArgExpression newArgExp = new TArgExpression {
_heldExp = heldExpr
};
return(newArgExp);
}
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);
}
