// - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
private static IExpression ParseMultExpression()
{
if (Check(FirstExpExp))
{
var exp = ParseExpExpression();
while (Check(new TokenSet(TokenType.Multiply | TokenType.Divide)))
{
var opType = _currentToken.Type;
Eat(opType);
if (!Check(FirstExpExp))
{
throw new InvalidSyntaxException("Expected an expression after * or / operator");
}
var right = ParseExpExpression();
switch (opType)
{
case TokenType.Multiply:
exp = new MultExpression(exp, right);
break;
case TokenType.Divide:
exp = new DivExpression(exp, right);
break;
default:
throw new UnexpectedBehaviorException("Expected mult or divide, got: " + opType);
}
}
return(exp);
}
throw new InvalidSyntaxException("Invalid expression");
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
private static IExpression ParseMultExpression()
{
if (Check(FirstExpExp))
{
var exp = ParseExpExpression();
while (Check(new TokenSet(TokenType.Multiply | TokenType.Divide)))
{
var opType = _currentToken.Type;
Eat(opType);
if (!Check(FirstExpExp))
{
throw new InvalidSyntaxException("Expected an expression after * or / operator");
}
var right = ParseExpExpression();
switch (opType)
{
case TokenType.Multiply:
exp = new MultExpression(exp, right);
break;
case TokenType.Divide:
exp = new DivExpression(exp, right);
break;
default:
throw new UnexpectedBehaviorException("Expected mult or divide, got: " + opType);
}
}
return exp;
}
throw new InvalidSyntaxException("Invalid expression");
}