/// <summary>
/// Recursive exp
/// </summary>
/// <param name="expressions">Expressions</param>
/// <param name="lastToken">Last token</param>
/// <param name="pLevel">Parenthesis level</param>
/// <param name="actualBlock">Actual block</param>
/// <returns>New expressions</returns>
List<IExpression> RecursiveExp(List<IExpression> expressions, Token lastToken, int pLevel, Block actualBlock)
{
if (pLevel < 0 || !HasNextToken())
return expressions;
Token actualToken = Peek();
bool restart = true;
switch (lastToken.Type)
{
case TokenType.IDENTIFIER:
switch (actualToken.Type)
{
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
case TokenType.DOT:
case TokenType.CLOSEPAREN:
actualToken = Pop();
expressions.Add(new VariableExpression(lastToken.Value, actualBlock));
break;
case TokenType.OPENPAREN:
actualToken = Pop();
List<List<IExpression>> exps = new List<List<IExpression>>();
while (!Match(TokenType.CLOSEPAREN))
{
exps.Add(Exp(actualBlock));
if (Match(TokenType.CLOSEPAREN))
break;
else if (!Match(TokenType.COMMA))
Logger.Error("Parameter need to be separated with a comma");
Pop(); // Pop the comma
}
expressions.Add(new MethodCallExpression(lastToken.Value, actualBlock, exps));
break;
default:
expressions.Add(new VariableExpression(lastToken.Value, actualBlock));
restart = false;
break;
}
break;
case TokenType.NEW:
switch (actualToken.Type)
{
case TokenType.IDENTIFIER:
Token customTypeToken = Pop();
List<List<IExpression>> exps = new List<List<IExpression>>();
if (Match(TokenType.OPENPAREN))
{
Pop(); // Pop the parenthesis
while (!Match(TokenType.CLOSEPAREN))
{
exps.Add(Exp(actualBlock));
if (Match(TokenType.COMMA))
{
Pop(); // Pop the comma
continue;
}
else
break;
}
}
else
Logger.Error("You need to open parenthesis after object instantation.");
if (!Match(TokenType.CLOSEPAREN))
Logger.Error("You need to close parenthesis after put parameters");
actualToken = Pop(); // Pop the parenthesis
expressions.Add(new ConstructorExpression(customTypeToken.Value, actualBlock, exps));
break;
default:
restart = false;
break;
}
break;
case TokenType.DOT:
switch (actualToken.Type)
{
case TokenType.IDENTIFIER:
case TokenType.CLOSEPAREN:
actualToken = Pop();
break;
default:
restart = false;
break;
}
break;
case TokenType.COMMA:
restart = false;
break;
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
switch (actualToken.Type)
{
case TokenType.IDENTIFIER:
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.INTLITERAL:
case TokenType.FLOATLITERAL:
case TokenType.STRINGLITERAL:
case TokenType.EXMARK:
case TokenType.OPENPAREN:
actualToken = Pop();
expressions.Add(new OperatorExpression(lastToken.Type));
break;
default:
restart = false;
break;
}
break;
case TokenType.STRINGLITERAL:
expressions.Add(new Value(VariableType.STRING, lastToken.Value));
switch (actualToken.Type)
{
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
actualToken = Pop();
break;
default:
restart = false;
break;
}
break;
case TokenType.BOOLLITERAL:
expressions.Add(new Value(VariableType.BOOL, lastToken.Value == Language.Keywords["true"] ? true : false));
switch (actualToken.Type)
{
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
actualToken = Pop();
break;
default:
restart = false;
break;
}
break;
case TokenType.INTLITERAL:
expressions.Add(new Value(VariableType.INT, Convert.ToInt32(lastToken.Value)));
switch (actualToken.Type)
{
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
case TokenType.CLOSEPAREN:
actualToken = Pop();
break;
default:
restart = false;
break;
}
break;
case TokenType.FLOATLITERAL:
expressions.Add(new Value(VariableType.FLOAT, Conv.StringToFloat(lastToken.Value)));
switch (actualToken.Type)
{
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
case TokenType.CLOSEPAREN:
actualToken = Pop();
break;
default:
restart = false;
break;
}
break;
case TokenType.EXMARK:
switch (actualToken.Type)
{
case TokenType.IDENTIFIER:
case TokenType.BOOLLITERAL:
case TokenType.OPENPAREN:
actualToken = Pop();
expressions.Add(new OperatorExpression(lastToken.Type));
break;
default:
restart = false;
break;
}
break;
case TokenType.OPENPAREN:
pLevel++;
expressions.Add(new OperatorExpression(lastToken.Type));
switch (actualToken.Type)
{
case TokenType.IDENTIFIER:
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
case TokenType.EXMARK:
case TokenType.BOOLLITERAL:
case TokenType.STRINGLITERAL:
case TokenType.INTLITERAL:
case TokenType.FLOATLITERAL:
case TokenType.OPENPAREN:
case TokenType.CLOSEPAREN:
actualToken = Pop();
break;
default:
restart = false;
break;
}
break;
case TokenType.CLOSEPAREN:
if (pLevel > 0)
{
pLevel--;
expressions.Add(new OperatorExpression(lastToken.Type));
switch (actualToken.Type)
{
case TokenType.PLUS:
case TokenType.MINUS:
case TokenType.MULTIPLY:
case TokenType.DIVIDE:
case TokenType.CLOSEPAREN:
actualToken = Pop();
break;
default:
restart = false;
break;
}
}
else
{
Push(lastToken);
restart = false;
}
break;
default:
restart = false;
break;
}
if (restart)
return RecursiveExp(expressions, actualToken, pLevel, actualBlock);
else
return expressions;
}
/// <summary>
/// Push a token
/// </summary>
/// <param name="token">Token to push</param>
void Push(Token token)
{
Tokens.Push(token);
}