public void Parse(ref string[] program)
{
string openbrace = ParseUtils.GetToken(ref program);
string nexttoken = ParseUtils.PeekToken(program);
while (nexttoken != "}")
{
TokenType type = WooScript.GetTokenType(nexttoken);
if (nexttoken.Equals("if", StringComparison.Ordinal))
{
IfStatement ifStatement = new IfStatement();
ifStatement.Parse(ref program);
_Statements.Add(ifStatement);
}
else if (nexttoken.Equals("repeat", StringComparison.Ordinal))
{
RepeatStatement repeatStatement = new RepeatStatement();
repeatStatement.Parse(ref program);
_Statements.Add(repeatStatement);
}
else if (nexttoken.Equals("{", StringComparison.Ordinal))
{
ScopeStatement scopeStatement = new ScopeStatement();
scopeStatement.Parse(ref program);
_Statements.Add(scopeStatement);
}
else if (type == TokenType.rule)
{
CallStatement callStatement = new CallStatement();
callStatement.Parse(ref program);
_Statements.Add(callStatement);
}
else if (type == TokenType.nullFunction)
{
NullStatement nullStatement = new NullStatement();
nullStatement.Parse(ref program);
_Statements.Add(nullStatement);
}
else if ((type == TokenType.vecVar) || (type == TokenType.floatVar))
{
VarStatement varStatement = new VarStatement();
varStatement.Parse(ref program);
_Statements.Add(varStatement);
}
else
{
throw new ParseException("Unexpected token \"" + nexttoken + "\" at start of expression");
}
nexttoken = ParseUtils.PeekToken(program);
}
string closebrace = ParseUtils.GetToken(ref program);
}
public void Parse(ref string[] program)
{
_Variable = ParseUtils.GetToken(ref program);
TokenType tokenType = WooScript.GetTokenType(_Variable);
if (tokenType == TokenType.floatVar)
{
_Type = VarType.varFloat;
}
else if (tokenType == TokenType.vecVar)
{
_Type = VarType.varVector;
}
else
{
throw new ParseException("Unknown type for variable \"" + _Variable + "\"");
}
}
public static ConditionalExpression Parse(ref string[] program)
{
ConditionalExpression ret = null;
Expression expr = null;
string token1 = ParseUtils.PeekToken(program);
TokenType type1 = WooScript.GetTokenType(token1);
if (token1.Equals("(", StringComparison.Ordinal))
{
ret = new ConditionalBrackets();
(ret as ConditionalBrackets).Parse(ref program);
}
else if (type1 == TokenType.UnaryBooleanOp)
{
ret = WooScript.GetUnaryBooleanOp(token1);
(ret as UnaryBooleanOp).Parse(ref program);
}
else if (type1 == TokenType.floatVar ||
type1 == TokenType.floatNum ||
type1 == TokenType.floatFunction)
{
expr = ExpressionBuilder.Parse(ref program);
}
else
{
throw new ParseException("Unrecognised expression \"" + token1 + "\"");
}
string token2 = ParseUtils.GetToken(ref program);
TokenType type2 = WooScript.GetTokenType(token2);
if (type2 == TokenType.ConditionalOp)
{
if (type1 != TokenType.floatNum && type1 != TokenType.floatVar && type1 != TokenType.floatFunction)
{
throw new ParseException("Conditional operation only takes floating point parameters");
}
ConditionalOp condOp = WooScript.GetConditionalOp(token2);
condOp._Arg1 = expr;
Expression arg2 = ExpressionBuilder.Parse(ref program);
if (arg2.GetExpressionType() != VarType.varFloat)
{
throw new ParseException("Conditional operation only takes floating point parameters");
}
condOp._Arg2 = arg2;
// no need for precedence check on conditional operator
ret = condOp;
string token3 = ParseUtils.PeekToken(program);
TokenType type3 = WooScript.GetTokenType(token3);
if (type3 == TokenType.BooleanOp)
{
BooleanOp boolOp = WooScript.GetBooleanOp(token3);
boolOp._Arg1 = condOp;
ConditionalExpression condArg2 = ConditionBuilder.Parse(ref program);
boolOp._Arg2 = condArg2;
// operator precedence check
if (condArg2 is BooleanOp)
{
if ((condArg2 as BooleanOp).GetPrecedence() < boolOp.GetPrecedence())
{
// shuffle args
boolOp._Arg2 = (condArg2 as BooleanOp)._Arg1;
(condArg2 as BooleanOp)._Arg1 = boolOp;
boolOp = (condArg2 as BooleanOp);
}
}
ret = boolOp;
}
}
if (ret == null)
{
throw new ParseException("Malformed conditional expression, expected conditional operation");
}
return(ret);
}
public static Expression Parse(ref string[] program)
{
Expression ret;
string token1 = ParseUtils.PeekToken(program);
TokenType type1 = WooScript.GetTokenType(token1);
if (token1.Equals("(", StringComparison.Ordinal))
{
ret = new Brackets();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatNum)
{
ret = new FloatNumber();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatVar ||
type1 == TokenType.vecVar)
{
ret = new Variable();
ret.Parse(ref program);
}
else if (type1 == TokenType.vecFunction)
{
ret = new VecFunctionExpr();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatFunction)
{
ret = new FloatFunctionExpr();
ret.Parse(ref program);
}
else if (type1 == TokenType.Op)
{
//deal with -8 type numbers
ret = new FloatNumber();
ret.Parse(ref program);
}
else
{
throw new ParseException("Unrecognised expression \"" + token1 + "\"");
}
/* if (type1 == TokenType.floatFunction)
* {
* ret = new FloatFunction();
* ret.Parse(ref program);
* }
*/
string token2 = ParseUtils.PeekToken(program);
TokenType type2 = WooScript.GetTokenType(token2);
if (type2 == TokenType.Op)
{
FloatOperation flop = new FloatOperation();
flop.Parse(ref program);
flop._Argument1 = ret;
Expression arg2 = ExpressionBuilder.Parse(ref program);
flop._Argument2 = arg2;
// operator precedence check
if (arg2 is FloatOperation)
{
if ((arg2 as FloatOperation).GetPrecedence() < flop.GetPrecedence())
{
// shuffle args
flop._Argument2 = (arg2 as FloatOperation)._Argument1;
(arg2 as FloatOperation)._Argument1 = flop;
flop = (arg2 as FloatOperation);
}
}
if (flop._Argument1.GetExpressionType() != flop._Argument2.GetExpressionType())
{
throw new ParseException("Mismatch argument types on operation");
}
ret = flop;
}
return(ret);
}
