public TerminalExp CreateExpression(List <Token> tokens)
{
var closeParanthesisIndex = TokenHelper.GetIndexPairParanthesis(tokens, 0);
List <Token> tok = tokens.GetRange(1, closeParanthesisIndex - 1);
TerminalExp expression = new ParanhesisExp(TerminalExpressionAnalyser.Analyse(tok));
return(expression);
}
public TerminalExp CreateExpression(List <Token> tokens)
{
int index = 0;
foreach (var token in tokens)
{
if (token.TokenType == TokenType.Minus)
{
index = tokens.IndexOf(token);
break;
}
}
foreach (var token in tokens)
{
if (token.TokenType == TokenType.Plus)
{
index = tokens.IndexOf(token);
break;
}
}
foreach (var token in tokens)
{
if (token.TokenType == TokenType.Divide)
{
index = tokens.IndexOf(token);
break;
}
}
foreach (var token in tokens)
{
if (token.TokenType == TokenType.Multiple)
{
index = tokens.IndexOf(token);
break;
}
}
TerminalExp exp1 = TerminalExpressionAnalyser.Analyse(tokens.GetRange(0, index));
TerminalExp exp2 = TerminalExpressionAnalyser.Analyse(tokens.GetRange(
index + 1, tokens.Count - index - 1));
switch (tokens[index].TokenType)
{
case TokenType.Multiple:
return(new MultipleExp(exp1, exp2));
case TokenType.Divide:
return(new DivideExp(exp1, exp2));
case TokenType.Plus:
return(new PlusExp(exp1, exp2));
case TokenType.Minus:
return(new MinusExp(exp1, exp2));
}
return(null);
}
public TerminalExp CreateExpression(List <Token> tokens)
{
int index = 0;
foreach (var token in tokens)
{
if ((token.TokenType == TokenType.Equal) ||
(token.TokenType == TokenType.More) ||
(token.TokenType == TokenType.Less) ||
(token.TokenType == TokenType.UpEqual) ||
(token.TokenType == TokenType.DownEqual))
{
index = tokens.IndexOf(token);
break;
}
}
TerminalExp exp1 = TerminalExpressionAnalyser.Analyse(tokens.GetRange(0, index));
TerminalExp exp2 = TerminalExpressionAnalyser.Analyse(tokens.GetRange(
index + 1, tokens.Count - index - 1));
if (exp1 is StringConstExp && exp2 is StringConstExp && tokens[index].TokenType == TokenType.Equal)
{
return(new EqualsExp(exp1, exp2));
}
switch (tokens[index].TokenType)
{
case TokenType.Equal:
return(new EqualsExp(exp1, exp2));
case TokenType.More:
return(new MoreExp(exp1, exp2));
case TokenType.Less:
return(new LessExp(exp1, exp2));
case TokenType.UpEqual:
return(new UpEqualExp(exp1, exp2));
case TokenType.DownEqual:
return(new DownEqualExp(exp1, exp2));
}
return(null);
}