private static bool DoParameter(ref StateContext context, int position)
{
if (context.IsWhitespace())
{
return(true);
}
switch (context.Character)
{
case ',':
context.State = context.GetOwnerState();
break;
case ']':
if (context.GetOwnerState() != State.Indexer)
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.Stack.Pop();
context.ResetState();
break;
case ')':
if (context.GetOwnerState() != State.Method)
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.Stack.Pop();
context.ResetState();
break;
default:
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
return(true);
}
private static bool DoNumber(ref StateContext context, int position)
{
switch (context.Character)
{
case ',':
var ownerState = context.GetOwnerState();
if (ownerState != State.Indexer && ownerState != State.Method)
{
context.OnError(EXCEPTION_UNKNOWN_MESSAGE);
return(false);
}
context.State = ownerState;
context.AppendParameterConstant(context.Stack.Peek());
break;
case ']':
if (context.GetOwnerState() != State.Indexer)
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.AppendParameterConstant(context.Stack.Pop());
context.ResetState();
break;
case ')':
if (context.GetOwnerState() != State.Method)
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.AppendParameterConstant(context.Stack.Pop());
context.ResetState();
break;
case '.':
var numberType = context.Flags.GetConstantType();
if (numberType == TypeCode.Double || numberType == TypeCode.Single || numberType == TypeCode.Decimal)
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.Flags.SetConstantType(TypeCode.Double);
context.Accept();
break;
case 'L':
context.State = State.Parameter;
context.Flags.SetConstantType(TypeCode.Int64);
context.AppendParameterConstant(context.Stack.Peek());
break;
case 'f':
case 'F':
context.State = State.Parameter;
context.Flags.SetConstantType(TypeCode.Single);
context.AppendParameterConstant(context.Stack.Peek());
break;
case 'm':
case 'M':
context.State = State.Parameter;
context.Flags.SetConstantType(TypeCode.Decimal);
context.AppendParameterConstant(context.Stack.Peek());
break;
default:
if (context.Character >= '0' && context.Character <= '9')
{
context.Accept();
}
else if (context.IsWhitespace())
{
context.State = State.Parameter;
context.AppendParameterConstant(context.Stack.Peek());
}
else
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
break;
}
return(true);
}
private static bool DoIdentifier(ref StateContext context, int position)
{
switch (context.Character)
{
case '.':
context.State = State.Separator;
context.AppendIdentifier(context.Peek());
context.Flags.IsAttaching(true);
break;
case '[':
context.State = State.Indexer;
context.AppendIdentifier(context.Peek());
context.AppendIndexer();
context.Flags.IsAttaching(false);
break;
case '(':
context.State = State.Method;
context.AppendMethod();
context.Flags.IsAttaching(false);
break;
case ',':
var ownerState = context.GetOwnerState();
if (ownerState == State.Indexer || ownerState == State.Method)
{
context.State = ownerState;
}
else
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.AppendIdentifier(context.Peek());
context.Flags.IsAttaching(false);
break;
case ']':
if (context.GetOwnerState() != State.Indexer)
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.AppendIdentifier(context.Stack.Pop());
context.Flags.IsAttaching(false);
//重置状态
context.ResetState();
break;
case ')':
if (context.GetOwnerState() != State.Method)
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
context.AppendIdentifier(context.Stack.Pop());
context.Flags.IsAttaching(false);
//重置状态
context.ResetState();
break;
default:
if (context.IsLetterOrDigitOrUnderscore())
{
//判断标识表达式中间是否含有空白字符
if (context.Flags.HasWhitespace())
{
context.OnError(string.Format(EXCEPTION_IDENTIFIER_WHITESPACE_MESSAGE, position));
return(false);
}
context.Accept();
}
else if (!context.IsWhitespace())
{
context.OnError(GetIllegalCharacterExceptionMessage(context.Character, position));
return(false);
}
break;
}
//重置是否含有空格的标记
context.Flags.HasWhitespace(context.IsWhitespace());
return(true);
}
