public override void Parse(TokensStack sTokens)
{
/*
* Function Type ID( args ){
* varDec*
* Statments*
* Return Statment
* }
*
* check more errors
*/
Token t;
StackIsNotEmpty(sTokens);
Token tFunc = sTokens.Pop();
if (!(tFunc is Statement) || ((Statement)tFunc).Name != "function")
{
throw new SyntaxErrorException("Expected function received: " + tFunc, tFunc);
}
StackIsNotEmpty(sTokens);
Token tType = sTokens.Pop();
if (!(tType is VarType))
{
throw new SyntaxErrorException("Expected var type, received " + tType, tType);
}
ReturnType = VarDeclaration.GetVarType(tType);
StackIsNotEmpty(sTokens);
Token tName = sTokens.Pop();
if (!(tName is Identifier))
{
throw new SyntaxErrorException("Expected function name, received " + tType, tType);
}
Name = ((Identifier)tName).Name;
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "(")
{
t = sTokens.Pop(); //(
}
else
{
throw new SyntaxErrorException("Expected ( Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
StackIsNotEmpty(sTokens);
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
if (sTokens.Count < 3)
{
throw new SyntaxErrorException("Early termination ", t);
}
Token tArgType = sTokens.Pop();
Token tArgName = sTokens.Pop();
VarDeclaration vc = new VarDeclaration(tArgType, tArgName);
Args.Add(vc);
if (sTokens.Count > 0 && sTokens.Peek() is Separator)//,
{
sTokens.Pop();
}
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == ")")
{
t = sTokens.Pop(); //)
}
else
{
throw new SyntaxErrorException("Expected ) Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "{")
{
t = sTokens.Pop(); //{
}
else
{
throw new SyntaxErrorException("Expected { Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
StackIsNotEmpty(sTokens);
while (sTokens.Count > 0 && (sTokens.Peek() is Statement) && (((Statement)sTokens.Peek()).Name == "var"))
{
VarDeclaration local = new VarDeclaration();
local.Parse(sTokens);
Locals.Add(local);
}
StackIsNotEmpty(sTokens);
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase s = StatetmentBase.Create(sTokens.Peek());
s.Parse(sTokens);
Body.Add(s);
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "}")
{
t = sTokens.Pop(); //}
}
else
{
throw new SyntaxErrorException("Expected } Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
}
public override void Parse(TokensStack sTokens)
{
Token tWhile = sTokens.Pop();
if (!(tWhile is Statement) || ((Statement)tWhile).Name != "if")
{
throw new SyntaxErrorException("Expected function received: " + tWhile, tWhile);
}
Token tPar = sTokens.Pop();
if (!(tPar is Parentheses) || ((Parentheses)tPar).Name != '(')
{
throw new SyntaxErrorException("Expected var type, received " + tPar, tPar);
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
Expression local = Expression.Create(sTokens);
//We call the Parse method of the VarDeclaration, which is responsible to parsing the elements of the variable declaration
local.Parse(sTokens);
Term = local;
}
Token tPar1 = sTokens.Pop();
if (!(tPar1 is Parentheses) || ((Parentheses)tPar1).Name != ')')
{
throw new SyntaxErrorException("Expected function received: " + tPar1, tPar1);
}
Token tPar2 = sTokens.Pop();
if (!(tPar2 is Parentheses) || ((Parentheses)tPar1).Name != '{')
{
throw new SyntaxErrorException("Expected function received: " + tPar2, tPar2);
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase state = StatetmentBase.Create(sTokens.Peek());
//We call the Parse method of the VarDeclaration, which is responsible to parsing the elements of the variable declaration
state.Parse(sTokens);
DoIfTrue.Add(state);
}
Token tPar3 = sTokens.Pop();
if (!(tPar3 is Parentheses) || ((Parentheses)tPar1).Name != '}')
{
throw new SyntaxErrorException("Expected function received: " + tPar3, tPar3);
}
if (sTokens.Count > 0 && sTokens.Peek() is Statement && ((Statement)sTokens.Pop()).Name.Equals("else"))
{
Token tPar4 = sTokens.Pop();
if (!(tPar4 is Parentheses) || ((Parentheses)tPar4).Name != '{')
{
throw new SyntaxErrorException("Expected function received: " + tPar4, tPar4);
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase state = StatetmentBase.Create(sTokens.Peek());
//We call the Parse method of the VarDeclaration, which is responsible to parsing the elements of the variable declaration
state.Parse(sTokens);
DoIfFalse.Add(state);
}
Token tPar5 = sTokens.Pop();
if (!(tPar5 is Parentheses) || ((Parentheses)tPar1).Name != '}')
{
throw new SyntaxErrorException("Expected function received: " + tPar5, tPar5);
}
}
}
//This is an example of the implementation of the Parse method
public override void Parse(TokensStack sTokens)
{
//We check that the first token is "function"
Token tFunc = sTokens.Pop();
if (!(tFunc is Statement) || ((Statement)tFunc).Name != "function")
{
throw new SyntaxErrorException("Expected function received: " + tFunc, tFunc);
}
//Now there should be the return type. We pop it from the stack, check for errors, and then set the field
Token tType = sTokens.Pop();
if (!(tType is VarType))
{
throw new SyntaxErrorException("Expected var type, received " + tType, tType);
}
ReturnType = VarDeclaration.GetVarType(tType);
//Next is the function name
Token tName = sTokens.Pop();
if (!(tName is Identifier))
{
throw new SyntaxErrorException("Expected function name, received " + tType, tType);
}
Name = ((Identifier)tName).Name;
//After the name there should be opening paranthesis for the arguments
Token t = sTokens.Pop(); //(
if (!(t is Parentheses) || ((Parentheses)t).Name != '(')
{
throw new SyntaxErrorException("Expected (, received " + t, t);
}
//Now we extract the arguments from the stack until we see a closing parathesis
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses)) //)
{
//For each argument there should be a type, and a name
if (sTokens.Count < 3)
{
throw new SyntaxErrorException("Early termination ", t);
}
Token tArgType = sTokens.Pop();
Token tArgName = sTokens.Pop();
VarDeclaration vc = new VarDeclaration(tArgType, tArgName);
Args.Add(vc);
//If there is a comma, then there is another argument
if (sTokens.Count > 0 && sTokens.Peek() is Separator)//,
{
t = sTokens.Pop();
if (((Separator)t).Name != ',')
{
throw new SyntaxErrorException(@"Expected , (comma), received " + t, t);
}
}
}
//Now we pop out the ) and the {. Note that you need to check that the stack contains the correct symbols here.
t = sTokens.Pop();//)
if (!(t is Parentheses) || ((Parentheses)t).Name != ')')
{
throw new SyntaxErrorException(@"Expected ), received " + t, t);
}
t = sTokens.Pop();//{
if (!(t is Parentheses) || ((Parentheses)t).Name != '{')
{
throw new SyntaxErrorException("Expected {, received " + t, t);
}
//Now we parse the list of local variable declarations
while (sTokens.Count > 0 && (sTokens.Peek() is Statement) && (((Statement)sTokens.Peek()).Name == "var"))
{
VarDeclaration local = new VarDeclaration();
//We call the Parse method of the VarDeclaration, which is responsible to parsing the elements of the variable declaration
local.Parse(sTokens);
Locals.Add(local);
}
//Now we parse the list of statements
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
//We create the correct Statement type (if, while, return, let) based on the top token in the stack
StatetmentBase s = StatetmentBase.Create(sTokens.Peek());
//And call the Parse method of the statement to parse the different parts of the statement
s.Parse(sTokens);
Body.Add(s);
}
//Need to check here that the last statement is a return statement
if (Body.Count == 0)
{
throw new SyntaxErrorException("function has no statements", sTokens.LastPop);
}
StatetmentBase sb = Body.Last();
if (!(sb is ReturnStatement))
{
throw new SyntaxErrorException("Expected return statement, received " + sb, sTokens.LastPop);//just token? need whole statement
}
//Finally, the function should end with }
Token tEnd = sTokens.Pop();//}
if (!(tEnd is Parentheses) || ((Parentheses)tEnd).Name != '}')
{
throw new SyntaxErrorException("Expected }, received " + tEnd, tEnd);
}
}
public override void Parse(TokensStack sTokens)
{
throw new NotImplementedException();
}
public override void Parse(TokensStack sTokens)
{
//init lists
DoIfTrue = new List <StatetmentBase>();
DoIfFalse = new List <StatetmentBase>();
//check for 'if'
Token token = sTokens.Pop();
if (!(token is Keyword) || ((Keyword)token).Name != "if")
{
throw new SyntaxErrorException("expected 'if', received " + token, token);
}
//check for '('
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != '(')
{
throw new SyntaxErrorException("expected '(' for if condition, received " + token, token);
}
//define and parse condition
Term = Expression.Create(sTokens);
Term.Parse(sTokens);
//check for ')'
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != ')')
{
throw new SyntaxErrorException("expected ')' for if condition, received " + token, token);
}
//check for '{'
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != '{')
{
throw new SyntaxErrorException("expected '{' for if body, received " + token, token);
}
//create body for 'if true'
token = sTokens.Peek();
StatetmentBase statetment = null;
if (token is Keyword)
{
statetment = StatetmentBase.Create(((Keyword)token).Name);
}
while (statetment != null)
{
statetment.Parse(sTokens);
DoIfTrue.Add(statetment);
token = sTokens.Peek();
statetment = null;
if (token is Keyword)
{
statetment = StatetmentBase.Create(((Keyword)token).Name);
}
}
//check for '}'
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != '}')
{
throw new SyntaxErrorException("expected '}' for if body, received " + token, token);
}
//check for 'else'
token = sTokens.Peek();
if ((token is Keyword) && ((Keyword)token).Name == "else")
{
sTokens.Pop();
//check for '{'
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != '{')
{
throw new SyntaxErrorException("expected '{' for else body, received " + token, token);
}
//create body for 'else'
statetment = null;
token = sTokens.Peek();
if (token is Keyword)
{
statetment = StatetmentBase.Create(((Keyword)token).Name);
}
while (statetment != null)
{
statetment.Parse(sTokens);
DoIfFalse.Add(statetment);
token = sTokens.Peek();
statetment = null;
if (token is Keyword)
{
statetment = StatetmentBase.Create(((Keyword)token).Name);
}
}
//check for '}'
token = sTokens.Pop();
Console.WriteLine(this);
if (!(token is Parentheses) || ((Parentheses)token).Name != '}')
{
throw new SyntaxErrorException("expected '}' for else body, received " + token, token);
}
}
}
public override void Parse(TokensStack sTokens) // ( operator opnd1 opnd2 )
{
Token tParentheses = sTokens.Pop(); // (
if (!(tParentheses is Parentheses))
{
throw new SyntaxErrorException("Expected Parentheses '(', recived " + tParentheses, tParentheses);
}
NumOfParent++;
Token tOperator = sTokens.Pop(); // operator
if (!(tOperator is Operator))
{
throw new SyntaxErrorException("Expected Binary Operator, recived " + tOperator, tOperator);
}
Operator = tOperator.ToString();
TokensStack temp = new TokensStack();
Operand1 = Expression.Create(sTokens);
Operand1.Parse(sTokens);
Operand2 = Expression.Create(sTokens);
Operand2.Parse(sTokens);
Token tE_Parentheses = sTokens.Pop();
if (sTokens.Count < 1)
{
throw new Exception("Code Terminated");
}
if (!(tE_Parentheses is Parentheses) && (tE_Parentheses).ToString().Equals(")"))
{
throw new SyntaxErrorException("Expected Parentheses ')', recived " + tE_Parentheses, tE_Parentheses);
}
/*while (NumOfParent != 0)
* {
* if (sTokens.Peek(0) is Parentheses && (((Parentheses)sTokens.Peek(0)).Name == '('))
* NumOfParent++;
* if (sTokens.Peek(0) is Parentheses && (((Parentheses)sTokens.Peek(0)).Name == ')'))
* NumOfParent--;
* temp.Push(sTokens.Pop());
* }
* if (sTokens.Peek(0) is Separator && ((Separator)sTokens.Peek(0)).Name == ';') // if ';' exist OR it's BinaryEXPRESSION in functionCall ~ foo(BinEXP) ~ foo((*xy))
* {
* Token tEnd = temp.Pop();
* }
* Token tParenthesesEnd = temp.Pop(); // ')' last one
* if (!(tParenthesesEnd is Parentheses && (((Parentheses)tParenthesesEnd).Name == ')')))
* throw new SyntaxErrorException("Expected Parentheses ')', recived " + tParenthesesEnd, tParenthesesEnd);
* if (temp.Peek(0) is Parentheses && (((Parentheses)temp.Peek(0)).Name == ')')) // if opnd2 is Expression - ')' because we ineserted backward from sTokens to temp stack
* {
* TokensStack Operand2Stack = new TokensStack();
* Operand2Stack.Push(temp.Pop()); // opernad2 stack <-- ')'
* while (!(temp.Peek(0) is Parentheses))
* Operand2Stack.Push(temp.Pop()); // operand2 stack <-- 'operator opnd1 opnd2'
* Operand2Stack.Push(temp.Pop()); // operand2 stack <-- '('
* Operand2 = Expression.Create(Operand2Stack);
* Operand2.Parse(Operand2Stack);
* }
* else if (!(temp.Peek(0) is Parentheses))// if opnd2 is number or variable
* {
* if (temp.Peek(0) is Identifier)
* {
* Operand2 = new VariableExpression();
* Operand2.Parse(temp);
* }
* else if (temp.Peek(0) is Number)
* {
* Operand2 = new NumericExpression();
* Operand2.Parse(temp);
* }
* }
* if (!(temp.Peek(0) is Parentheses))// if opnd1 is Number or variable
* {
* if (temp.Peek(0) is Identifier)
* {
* Operand1 = new VariableExpression();
* Operand1.Parse(temp);
* }
* else if (temp.Peek(0) is Number)
* {
* Operand1 = new NumericExpression();
* Operand1.Parse(temp);
* }
* }
* else // if opnd1 is EXPRESSION
* {
* TokensStack Operand1Stack = new TokensStack();
* while (!(temp.Count < 0)) // reverse EXPRESSION from temp stack to Operand1Stack to hold the legal expression for opnd1
* Operand1Stack.Push(temp.Pop());
* Operand1 = Expression.Create(Operand1Stack);
* Operand1.Parse(Operand1Stack);
* }*/
}
public override void Parse(TokensStack sTokens)
{
//check for 'while'
Token token = sTokens.Pop();
if (!(token is Keyword) || ((Keyword)token).Name != "while")
{
throw new SyntaxErrorException("expected 'while', received " + token, token);
}
//check for '('
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != '(')
{
throw new SyntaxErrorException("expected '(' for while condition, received " + token, token);
}
//define and parse condition
Term = Expression.Create(sTokens);
Term.Parse(sTokens);
//check for ')'
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != ')')
{
throw new SyntaxErrorException("expected ')' for while condition, received " + token, token);
}
//check for '{'
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != '{')
{
throw new SyntaxErrorException("expected '{' for while body, received " + token, token);
}
//create body for while
Body = new List <StatetmentBase>();
token = sTokens.Peek();
StatetmentBase statetment = null;
if (token is Keyword)
{
statetment = StatetmentBase.Create(((Keyword)token).Name);
}
while (statetment != null)
{
statetment.Parse(sTokens);
Body.Add(statetment);
token = sTokens.Peek();
statetment = null;
if (token is Keyword)
{
statetment = StatetmentBase.Create(((Keyword)token).Name);
}
}
//check for '}'
token = sTokens.Pop();
if (!(token is Parentheses) || ((Parentheses)token).Name != '}')
{
throw new SyntaxErrorException("expected '}' for while body, received " + token, token);
}
}
public override void Parse(TokensStack sTokens)
{
Identifier t = (Identifier)sTokens.Pop();
Name = t.Name;
}
public override void Parse(TokensStack sTokens)
{
/*
* 'if' '('Expression')' '{' Statment* '}' ('else' '{' Statment* '}' )
*/
DoIfTrue = new List <StatetmentBase>();
DoIfFalse = new List <StatetmentBase>();
Token t;
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Statement && sTokens.Peek().ToString() == "if")
{
Token tStartIF = sTokens.Pop(); //if
}
else
{
throw new SyntaxErrorException("Expected if statment received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "(")
{
t = sTokens.Pop(); //(
}
else
{
throw new SyntaxErrorException("Expected ( Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
while ((sTokens.Count > 0 && !(sTokens.Peek() is Parentheses) || (sTokens.Peek().ToString() != ")")))
{
if (sTokens.Count < 3)
{
throw new SyntaxErrorException("Early termination ", t);
}
Term = Expression.Create(sTokens);
if (Term == null)
{
t = new Token();
throw new SyntaxErrorException("Invalid Exception", t);
}
Term.Parse(sTokens);
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == ")")
{
t = sTokens.Pop(); //)
}
else
{
throw new SyntaxErrorException("Expected ) Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "{")
{
t = sTokens.Pop(); //{
}
else
{
throw new SyntaxErrorException("Expected { Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
//DoIftrue
StackIsNotEmpty(sTokens);
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase sTrue = StatetmentBase.Create(sTokens.Peek());
sTrue.Parse(sTokens);
DoIfTrue.Add(sTrue);
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "}")
{
t = sTokens.Pop(); //}
}
else
{
throw new SyntaxErrorException("Expected } Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
StackIsNotEmpty(sTokens);
//DoIfFalse
if (sTokens.Peek().ToString() == "else")
{
if (sTokens.Peek() is Statement && sTokens.Peek().ToString() == "else")
{
Token tStartELSE = sTokens.Pop(); //else
}
else
{
throw new SyntaxErrorException("Expected else statment received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "{")
{
t = sTokens.Pop(); //{
}
else
{
throw new SyntaxErrorException("Expected { Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase sFalse = StatetmentBase.Create(sTokens.Peek());
sFalse.Parse(sTokens);
DoIfFalse.Add(sFalse);
}
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Parentheses && sTokens.Peek().ToString() == "}")
{
t = sTokens.Pop(); //}
}
else
{
throw new SyntaxErrorException("Expected } Parentheses received: " + sTokens.Peek().ToString(), sTokens.Peek());
}
}
}
