public override void Parse(TokensStack sTokens)
{
Token tWhile = sTokens.Pop();
if (!(tWhile is Statement) || !((Statement)tWhile).Name.Equals("while"))
{
throw new SyntaxErrorException("$Expected while", tWhile);
}
Token con_open = sTokens.Pop();
if (!(con_open is Parentheses) || ((Parentheses)con_open).Name != '(')
{
throw new SyntaxErrorException("$Expected (", con_open);
}
Term = Expression.Create(sTokens);
Term.Parse(sTokens);
/*while (!(sTokens.Peek() is Parentheses))
* {
* sTokens.Pop();
* }*/
Token con_close = sTokens.Pop();
if (!(con_close is Parentheses) || ((Parentheses)con_close).Name != ')')
{
throw new SyntaxErrorException("$Expected )", con_close);
}
Token while_open = sTokens.Pop();
if (!(while_open is Parentheses) || ((Parentheses)while_open).Name != '{')
{
throw new SyntaxErrorException("$Expected {", while_open);
}
Body = new List <StatetmentBase>();
while (sTokens.Count > 0 & !(sTokens.Peek() is Parentheses))
{
StatetmentBase statetmentBase = StatetmentBase.Create(sTokens.Peek());
statetmentBase.Parse(sTokens);
Body.Add(statetmentBase);
if (sTokens.Count > 0 && sTokens.Peek() is Separator)//,
{
sTokens.Pop();
}
}
Token while_close = sTokens.Pop();
if (!(while_close is Parentheses) || ((Parentheses)while_close).Name != '}')
{
throw new SyntaxErrorException("$Expected }", while_close);
}
}
public override void Parse(TokensStack sTokens)
{
Token tFunc = sTokens.Pop();
if (!(tFunc is Statement) || ((Statement)tFunc).Name != "function")
{
throw new SyntaxErrorException("Expected function received: " + tFunc, tFunc);
}
Token tType = sTokens.Pop();
if (!(tType is VarType))
{
throw new SyntaxErrorException("Expected var type, received " + tType, tType);
}
ReturnType = VarDeclaration.GetVarType(tType);
Token tName = sTokens.Pop();
if (!(tName is Identifier))
{
throw new SyntaxErrorException("Expected function name, received " + tType, tType);
}
Name = ((Identifier)tName).Name;
Token t = sTokens.Pop(); //(
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();
}
}
t = sTokens.Pop(); //)
t = sTokens.Pop(); //{
while (sTokens.Count > 0 && (sTokens.Peek() is Statement) && (((Statement)sTokens.Peek()).Name == "var"))
{
VarDeclaration local = new VarDeclaration();
local.Parse(sTokens);
Locals.Add(local);
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase s = StatetmentBase.Create(sTokens.Peek());
s.Parse(sTokens);
Body.Add(s);
}
Token tEnd = sTokens.Pop();//}
}
public static StatetmentBase Create(Token t)
{
if (t is Statement)
{
Statement s = (Statement)t;
StatetmentBase se = Create(s.Name);
if (se == null)
{
throw new SyntaxErrorException("Expected statement type" + t.ToString() + "1", t);
}
return(se);
}
throw new SyntaxErrorException("Expected statement type" + t.ToString() + "2", t);
}
public override void Parse(TokensStack sTokens)
{
Body = new List <StatetmentBase>();
if (sTokens.Count < 6)
{
throw new SyntaxErrorException("Early termination ", sTokens.LastPop);
}
Token tWhile = sTokens.Pop();
if (!(tWhile is Statement) || ((Statement)tWhile).Name != "while")
{
throw new SyntaxErrorException("Expected while statment , received " + tWhile, tWhile);
}
Token t = sTokens.Pop(); //(
if (!(t is Parentheses) || ((Parentheses)t).Name != '(')
{
throw new SyntaxErrorException("Expected ( , received ", t);
}
Expression pTerm = (Expression.Create(sTokens));
pTerm.Parse(sTokens);
Term = pTerm;
t = sTokens.Pop(); //(
if (!(t is Parentheses) || ((Parentheses)t).Name != ')')
{
throw new SyntaxErrorException("Expected ) , received ", t);
}
t = sTokens.Pop(); //(
if (!(t is Parentheses) || ((Parentheses)t).Name != '{')
{
throw new SyntaxErrorException("Expected { , received ", t);
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase s = StatetmentBase.Create(sTokens.Peek());
s.Parse(sTokens);
Body.Add(s);
}
Token tEnd = sTokens.Pop();//}
}
protected static void ParseStatements(TokensStack sTokens, List <StatetmentBase> body)
{
Token token = sTokens.Pop(); // '{'
if (!(token is Parentheses) || ((Parentheses)token).Name != '{')
{
throw new SyntaxErrorException($"Expected a '{{' but saw '{token}'", token);
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
token = sTokens.Peek();
StatetmentBase statetment = Create(token);
statetment.Parse(sTokens);
body.Add(statetment);
}
token = sTokens.Pop(); // '}'
if (!(token is Parentheses) || ((Parentheses)token).Name != '}')
{
throw new SyntaxErrorException($"Expected a '}}' but saw '{token}'", token);
}
}
//This is an example of the implementation of the Parse method
public override void Parse(TokensStack sTokens)
{
//We check that the first token is "function"
Token tFunc = sTokens.Pop();
if (!(tFunc is Statement) || ((Statement)tFunc).Name != "function")
{
throw new SyntaxErrorException("Expected function received: " + tFunc, tFunc);
}
//Now there should be the return type. We pop it from the stack, check for errors, and then set the field
Token tType = sTokens.Pop();
if (!(tType is VarType))
{
throw new SyntaxErrorException("Expected var type, received " + tType, tType);
}
ReturnType = VarDeclaration.GetVarType(tType);
//Next is the function name
Token tName = sTokens.Pop();
if (!(tName is Identifier))
{
throw new SyntaxErrorException("Expected function name, received " + tType, tType);
}
Name = ((Identifier)tName).Name;
//After the name there should be opening paranthesis for the arguments
Token t = sTokens.Pop(); //(
if (!(t is Parentheses) || ((Parentheses)t).Name != '(')
{
throw new SyntaxErrorException($"Expected a '(' but saw '{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 (!(t is Separator) || ((Separator)t).Name != ',')
{
throw new SyntaxErrorException($"Expected a ',' but saw '{t}'", t);
}
}
}
//Now we pop out the ) and the {. Note that you need to check that the stack contains the correct symbols here.
t = sTokens.Pop();//)
if (!(t is Parentheses) || ((Parentheses)t).Name != ')')
{
throw new SyntaxErrorException($"Expected a ')' but saw '{t}'", t);
}
t = sTokens.Pop();//{
if (!(t is Parentheses) || ((Parentheses)t).Name != '{')
{
throw new SyntaxErrorException($"Expected a '{{' but saw '{t}'", t);
}
//Now we parse the list of local variable declarations
while (sTokens.Count > 0 && (sTokens.Peek() is Statement) && (((Statement)sTokens.Peek()).Name == "var"))
{
VarDeclaration local = new VarDeclaration();
//We call the Parse method of the VarDeclaration, which is responsible to parsing the elements of the variable declaration
local.Parse(sTokens);
Locals.Add(local);
}
//Now we parse the list of statements
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
//We create the correct Statement type (if, while, return, let) based on the top token in the stack
StatetmentBase s = StatetmentBase.Create(sTokens.Peek());
//And call the Parse method of the statement to parse the different parts of the statement
s.Parse(sTokens);
Body.Add(s);
}
bool hasReturn = false;
if (Body.Count > 0)
{
StatetmentBase lastStatetment = Body[Body.Count - 1];
Body.RemoveAt(Body.Count - 1);
if (lastStatetment is ReturnStatement)
{
Return = (ReturnStatement)lastStatetment;
hasReturn = true;
}
else
{
hasReturn = false;
}
}
//Need to check here that the last statement is a return statement
//Finally, the function should end with }
Token tEnd = sTokens.Pop();//}
if (!hasReturn)
{
throw new SyntaxErrorException("Missing a return statement.", tEnd);
}
if (!(tEnd is Parentheses) || ((Parentheses)tEnd).Name != '}')
{
throw new SyntaxErrorException($"Expected a '}}' but saw '{t}'", t);
}
}
public override void Parse(TokensStack sTokens)
{
Body = new List <StatetmentBase>();
if (sTokens.Count <= 0)
{
throw new SyntaxErrorException("Missing while", new Token());
}
else
{
Token t1 = sTokens.Pop();
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals('('))
{
Token t2 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing (", sTokens.Pop());
}
Term = Expression.Create(sTokens);
if (Term != null)
{
Term.Parse(sTokens);
}
else
{
throw new SyntaxErrorException("Bad exp", new Token());
}
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals(')'))
{
Token t3 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing )", sTokens.Pop());
}
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals('{'))
{
Token t4 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing {", sTokens.Pop());
}
while (/*sTokens.Count > 0 && (((sTokens.Peek() is Parentheses) && !(((Parentheses)sTokens.Peek()).Name.Equals('}'))) || (!(sTokens.Peek() is Parentheses)))*/ sTokens.Count > 0 && ((!(sTokens.Peek() is Parentheses))))
{
StatetmentBase st = StatetmentBase.Create(sTokens.Peek());
if (st != null)
{
st.Parse(sTokens);
Body.Add(st);
}
else
{
throw new SyntaxErrorException("illegal statement", new Token());
}
}
if (sTokens.Count > 0 && ((sTokens.Peek() is Parentheses)))
{
Token t5 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing }", sTokens.Pop());
}
}
}
public override void Parse(TokensStack sTokens)
{
DoIfTrue = new List <StatetmentBase>();
DoIfFalse = new List <StatetmentBase>();
if (sTokens.Count < 5)
{
throw new SyntaxErrorException("Early termination ", sTokens.LastPop);
}
Token tIF = sTokens.Pop();
if (!(tIF is Statement) || ((Statement)tIF).Name != "if")
{
throw new SyntaxErrorException("Expected while statment , received " + tIF, tIF);
}
Token t = sTokens.Pop(); //(
if (!(t is Parentheses) || ((Parentheses)t).Name != '(')
{
throw new SyntaxErrorException("Expected ( , received ", t);
}
Term = Expression.Create(sTokens);
Term.Parse(sTokens);
t = sTokens.Pop(); //)
if (!(t is Parentheses) || ((Parentheses)t).Name != ')')
{
throw new SyntaxErrorException("Expected ) , received ", t);
}
t = sTokens.Pop(); //{
if (!(t is Parentheses) || ((Parentheses)t).Name != '{')
{
throw new SyntaxErrorException("Expected { , received ", t);
}
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase s = StatetmentBase.Create(sTokens.Peek());
s.Parse(sTokens);
DoIfTrue.Add(s);
}
t = sTokens.Pop(); //}
if (sTokens.Count > 3 && sTokens.Peek() is Statement && ((Statement)sTokens.Peek()).Name == "else")
{
t = sTokens.Pop();
if (!(sTokens.Peek() is Parentheses))
{
throw new SyntaxErrorException("Expected { , received ", sTokens.Peek());
}
if (((Parentheses)sTokens.Peek()).Name != '{')
{
throw new SyntaxErrorException("Expected { , received ", sTokens.Peek());
}
t = sTokens.Pop(); //{
while (sTokens.Count > 0 && !(sTokens.Peek() is Parentheses))
{
StatetmentBase s = StatetmentBase.Create(sTokens.Peek());
s.Parse(sTokens);
DoIfFalse.Add(s);
}
Token tEnd = sTokens.Pop();
}
}
public override void Parse(TokensStack sTokens)
{
DoIfTrue = new List <StatetmentBase>();
DoIfFalse = new List <StatetmentBase>();
Token tIf = sTokens.Pop();
if (!(tIf.ToString().Equals("if")))
{
throw new SyntaxErrorException("Expected if statment, recived " + tIf, tIf);
}
Token termS_Parentheses = sTokens.Pop();
if (!(termS_Parentheses is Parentheses) && !(termS_Parentheses).ToString().Equals("("))
{
throw new SyntaxErrorException("Expected Parentheses '(', recived " + termS_Parentheses, termS_Parentheses);
}
Term = Expression.Create(sTokens);
Term.Parse(sTokens);
Token termE_Parentheses = sTokens.Pop();
if (!(termE_Parentheses is Parentheses) && !(termE_Parentheses).ToString().Equals(")"))
{
throw new SyntaxErrorException("Expected Parentheses ')', recived " + termE_Parentheses, termE_Parentheses);
}
Token tS_Parentheses = sTokens.Pop();
if (!(tS_Parentheses is Parentheses) && !(tS_Parentheses).ToString().Equals("{"))
{
throw new SyntaxErrorException("Expected Parentheses '{', recived " + tS_Parentheses, tS_Parentheses);
}
while (!(sTokens.Peek(0) is Parentheses && ((Parentheses)sTokens.Peek(0)).Name == '}'))
{
Token tStatment = sTokens.Peek();
StatetmentBase statetment = StatetmentBase.Create(tStatment);
statetment.Parse(sTokens);
DoIfTrue.Add(statetment);
}
Token tE_Parentheses = sTokens.Pop();
if (!(tE_Parentheses is Parentheses) && !(tE_Parentheses).ToString().Equals("}"))
{
throw new SyntaxErrorException("Expected Parentheses '}', recived " + tE_Parentheses, tE_Parentheses);
}
if (sTokens.Peek(0).ToString().Equals("else")) // else statment
{
Token tElse = sTokens.Pop();
Token elseS_Parentheses = sTokens.Pop();
if (!(elseS_Parentheses is Parentheses) && !(elseS_Parentheses).ToString().Equals("{"))
{
throw new SyntaxErrorException("Expected Parentheses '{', recived " + elseS_Parentheses, elseS_Parentheses);
}
while (!(sTokens.Peek(0) is Parentheses && (sTokens.Peek(0)).ToString().Equals("}")))
{
Token tStatment = sTokens.Peek();
StatetmentBase statetment = StatetmentBase.Create(tStatment);
statetment.Parse(sTokens);
DoIfFalse.Add(statetment);
}
Token elseE_Parentheses = sTokens.Pop();
if (!(elseE_Parentheses is Parentheses) && !(elseE_Parentheses).ToString().Equals("}"))
{
throw new SyntaxErrorException("Expected Parentheses '}', recived " + elseE_Parentheses, elseE_Parentheses);
}
}
}
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);
}
}
}
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)
{
//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)
{
//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)
{
/*
* '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());
}
}
}
public override void Parse(TokensStack sTokens)
{
DoIfTrue = new List <StatetmentBase>();
DoIfFalse = new List <StatetmentBase>();
if (((Statement)sTokens.Peek()).Name.Equals("if"))
{
Token tIf = sTokens.Pop();
if (!(tIf is Statement) || !((Statement)tIf).Name.Equals("if"))
{
throw new SyntaxErrorException("$Expected if", tIf);
}
Token con_open = sTokens.Pop();
if (!(con_open is Parentheses) || ((Parentheses)con_open).Name != '(')
{
throw new SyntaxErrorException("$Expected (", con_open);
}
Term = Expression.Create(sTokens);
Term.Parse(sTokens);
/* while (!(sTokens.Peek() is Parentheses))
* {
* sTokens.Pop();
* }*/
Token con_close = sTokens.Pop();
if (!(con_close is Parentheses) || ((Parentheses)con_close).Name != ')')
{
throw new SyntaxErrorException("$Expected )", con_close);
}
Token open_if = sTokens.Pop();
if (!(open_if is Parentheses) || ((Parentheses)open_if).Name != '{')
{
throw new SyntaxErrorException("$Expected {", open_if);
}
while (sTokens.Count > 0 & !(sTokens.Peek() is Parentheses))
{
StatetmentBase statetmentBase = StatetmentBase.Create(sTokens.Peek());
statetmentBase.Parse(sTokens);
DoIfTrue.Add(statetmentBase);
if (sTokens.Count > 0 && sTokens.Peek() is Separator)//,
{
sTokens.Pop();
}
}
Token close_if = sTokens.Pop();
if (!(close_if is Parentheses) || ((Parentheses)close_if).Name != '}')
{
throw new SyntaxErrorException("$Expected }", close_if);
}
if ((sTokens.Peek() is Statement) && ((Statement)sTokens.Peek()).Name.Equals("else"))
{
Token tElse = sTokens.Pop();
if (!(tElse is Statement) || !((Statement)tElse).Name.Equals("else"))
{
throw new SyntaxErrorException("$Expected else" + tElse.ToString(), tElse);
}
Token open_else = sTokens.Pop(); // not must
if (!(open_else is Parentheses) || ((Parentheses)open_else).Name != '{')
{
throw new SyntaxErrorException("$Expected {", open_else);
}
while (sTokens.Count > 0 & !(sTokens.Peek() is Parentheses))
{
StatetmentBase statetmentBase = StatetmentBase.Create(sTokens.Peek());
statetmentBase.Parse(sTokens);
DoIfFalse.Add(statetmentBase);
if (sTokens.Count > 0 && sTokens.Peek() is Separator)//,
{
sTokens.Pop();
}
}
Token close_else = sTokens.Pop();
if (!(close_else is Parentheses) || ((Parentheses)close_else).Name != '}')
{
throw new SyntaxErrorException("$Expected }", close_else);
}
}
}
}
public override void Parse(TokensStack sTokens)
{
DoIfTrue = new List <StatetmentBase>();
DoIfFalse = new List <StatetmentBase>();
if (sTokens.Count <= 0)
{
throw new SyntaxErrorException("Missing if", new Token());
}
else
{
Token t1 = sTokens.Pop();
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals('('))
{
Token t2 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing (", sTokens.Pop());
}
Term = Expression.Create(sTokens);
if (Term != null)
{
Term.Parse(sTokens);
}
else
{
throw new SyntaxErrorException("Bad Exp", sTokens.Pop());
}
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals(')'))
{
Token t3 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing )", sTokens.Pop());
}
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals('{'))
{
Token t4 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing {", sTokens.Pop());
}
while (sTokens.Count > 0 && ((!(sTokens.Peek() is Parentheses))))
{
StatetmentBase st = StatetmentBase.Create(sTokens.Peek()); //maybe need fix
if (st != null)
{
st.Parse(sTokens);
DoIfTrue.Add(st);
}
else
{
throw new SyntaxErrorException("illegal exp", sTokens.Pop());
}
}
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals('}'))
{
Token t3 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing }", sTokens.Pop());
}
if (sTokens.Peek() is Statement && ((Statement)sTokens.Peek()).Name.Equals("else"))
{
Token t4 = sTokens.Pop();
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals('{'))
{
Token t5 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing (", sTokens.Pop());
}
while (/*sTokens.Count > 0 && (((sTokens.Peek() is Parentheses) && ((Parentheses)sTokens.Peek()).Name.Equals('}')) || (!(sTokens.Peek() is Parentheses)))*/ sTokens.Count > 0 && ((!(sTokens.Peek() is Parentheses))))///
{
StatetmentBase st2 = StatetmentBase.Create(sTokens.Peek());
if (st2 != null)
{
st2.Parse(sTokens);
DoIfFalse.Add(st2);
}
else
{
throw new SyntaxErrorException("illegal exp", sTokens.Pop());
}
}
if (sTokens.Peek() is Parentheses && ((Parentheses)sTokens.Peek()).Name.Equals('}'))
{
Token t6 = sTokens.Pop();
}
else
{
throw new SyntaxErrorException("Missing }", sTokens.Pop());
}
}
else
{
}
}
}
public override void Parse(TokensStack sTokens)
{
/*
* 'while' '(' expression ')' '{' statement* '}'
*/
Body = new List <StatetmentBase>();
Token t;
StackIsNotEmpty(sTokens);
if (sTokens.Peek() is Statement && sTokens.Peek().ToString() == "while")
{
Token tStartWhile = sTokens.Pop(); //while
}
else
{
throw new SyntaxErrorException("Expected while 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());
}
StackIsNotEmpty(sTokens);
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());
}
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());
}
}