public static ExpressionNode Parse(TokenString tStr)
{
if (tStr[0].Type == TokenType.rBraceOpen && tStr.Last().Type == TokenType.rBraceClose)
{
var trimmedLine = tStr.GetRangeInBrackets(0);
if (trimmedLine != null)
{
tStr = trimmedLine;
}
}
if (tStr.Last().Type == TokenType.lineEnd)
{
tStr.RemoveAt(tStr.Count - 1);
}
if (tStr.Count == 1)
{
if (tStr[0].Type == TokenType.identifier)
{
return(new IdentifierExpNode(tStr[0].Value));
}
else if (tStr[0].Type == TokenType.constant)
{
return(new LiteralExpNode("INTEGER", tStr[0].Value));
}
else if (tStr[0].Type == TokenType.@string)
{
return(new LiteralExpNode("STRING", tStr[0].Value));
}
}
if (tStr[0].Type == TokenType.typeSpecifier || tStr[0].Type == TokenType.identifier)
{
if (tStr[1].Type == TokenType.identifier)
{
VariableDefExpNode vdNode = new VariableDefExpNode(tStr[0].Value);
var defs = tStr.GetRangeUntil(1, TokenType.lineEnd).Split(false, TokenType.comma);
foreach (var defTStr in defs)
{
string varName = defTStr[0].Value;
var varDef = Exp.Parse(defTStr);
vdNode.AddVariable(varName, varDef);
}
return(vdNode);
}
}
if ((tStr[0].Type == TokenType.prepostOperator || tStr[0].Type == TokenType.preOperator) && tStr[1].Type == TokenType.identifier)
{
return(new PreUnaryExpNode(tStr[0].Value, new TokenString(tStr[1])));
}
if (tStr[0].Type == TokenType.identifier && (tStr[1].Type == TokenType.prepostOperator || tStr[1].Type == TokenType.postOperator))
{
return(new PostUnaryExpNode(tStr[1].Value, new TokenString(tStr[0])));
}
int bracNum = 0;
Token opToken = null;
int opPriority = -1;
// Get all operators
for (int i = tStr.Count - 1; i >= 0; i--)
{
if (tStr[i].Type == TokenType.rBraceOpen)
{
bracNum++;
}
else if (tStr[i].Type == TokenType.rBraceClose)
{
bracNum--;
}
else if (bracNum == 0 && (tStr[i].Type == TokenType.binaryOperator || tStr[i].Type == TokenType.accessOperator))
{
int tempOPPriority = Parser.GetOperatorPriority(tStr[i], opPriority);
if (tempOPPriority > opPriority)
{
opToken = tStr[i];
opPriority = tempOPPriority;
}
}
}
if (opToken == null)
{
if (tStr.Match(0, TokenType.@new, TokenType.identifier, TokenType.rBraceOpen))
{
ConstructionExpNode ceNode = new ConstructionExpNode(tStr[1].Value);
var argRangesUnsplit = tStr.GetRangeInBrackets(2);
if (argRangesUnsplit.Count > 0)
{
var argRanges = argRangesUnsplit.Split(false, TokenType.comma);
foreach (var argRange in argRanges)
{
ceNode.AddArgument(Exp.Parse(argRange));
}
}
return(ceNode);
}
else if (tStr.Match(0, TokenType.identifier, TokenType.rBraceOpen))
{
MethodCallExpNode mceNode = new MethodCallExpNode(tStr[0].Value);
var argRangesUnsplit = tStr.GetRangeInBrackets(1);
if (argRangesUnsplit.Count > 0)
{
var argRanges = argRangesUnsplit.Split(false, TokenType.comma);
foreach (var argRange in argRanges)
{
mceNode.AddArgument(Exp.Parse(argRange));
}
}
return(mceNode);
}
return(null);
}
int tIndex = tStr.IndexOf(opToken);
var left = tStr.GetRangeTStr(0, tIndex);
var right = tStr.GetRangeTStr(tIndex + 1);
ExpressionNode node = null;
switch (opToken.Type)
{
case TokenType.binaryOperator:
node = new BinaryExpNode(opToken.Value, left, right);
break;
case TokenType.accessOperator:
node = new MemberExpNode(opToken.Value, left, right);
break;
//case TokenType.preOperator:
// node = new PreUnaryExpNode(opToken.Value, right);
// break;
//case TokenType.postOperator:
// node = new PostUnaryExpNode(opToken.Value, left);
// break;
//case TokenType.prepostOperator:
// if (left.Count == 0)
// node = new PreUnaryExpNode(opToken.Value, right);
// else
// node = new PostUnaryExpNode(opToken.Value, left);
// break;
default:
break;
}
return(node);
}