internal override unsafe void ReadToken(ParseContext context)
{
if (context.Str[context.Pos] != ',')
{
return;
}
TokenType lastType = context._lastTokenType;
if (lastType != TokenType.Int32Operand &&
lastType != TokenType.RandomOperand &&
lastType != TokenType.RightParenthesis)
{
context.SetFail("错误的逗号。");
return;
}
while (!context.StackEmpty && context.StackTop.Type != TokenType.LeftParenthesis)
{
context.Enqueue(context.Pop());
}
if (context.StackTop.Type != TokenType.LeftParenthesis)
{
context.SetFail("逗号位置错误，或不匹配的括号。");
return;
}
context._lastTokenType = Type;
++context.Pos;
}
internal override void ReadToken(ParseContext context)
{
TokenType lastToken = context._lastTokenType;
bool isNegative = context._lastTokenType == TokenType.Negative;
long value = GetABSInt32FixPos(context);
if (value <= -1L)
{
if (isNegative)
{
context.SetFail("错误的“-”号。");
}
return;
}
if (lastToken == TokenType.Int32Operand || lastToken == TokenType.RandomOperand ||
lastToken == TokenType.Function || lastToken == TokenType.RightParenthesis)
{
context.SetFail("常数操作符位置错误。");
return;
}
context._lastTokenType = Type;
context.Enqueue(new Int32Operand
{
Value = (isNegative ? (0L - value) : value)
});
}
internal override unsafe void ReadToken(ParseContext context)
{
if (context.Str[context.Pos] != 'd' && context.Str[context.Pos] != 'D')
{
return;
}
context.Pos++;
long dice = Int32Operand.GetABSInt32FixPos(context);
TokenType lastToken = context._lastTokenType;
if (lastToken == TokenType.RightParenthesis || lastToken == TokenType.RandomOperand || lastToken == TokenType.Function ||
(dice != 2L && dice != 4L && dice != 6L && dice != 8L && dice != 10L && dice != 12L && dice != 20L && dice != 100L))
{
context.SetFail("错误的骰子指令。");
return;
}
context._lastTokenType = TokenType.RandomOperand;
if (lastToken != TokenType.Int32Operand)
{
context._containsDice = true;
context.Enqueue(Create(1L, dice));
return;
}
long r = (context.QueueEnd as Int32Operand).Value;
if (r < 1L || r > 100L)
{
context.SetFail("骰子数量限制为1~100.");
return;
}
context._containsDice = true;
context.Replace(Create(r, dice));
}
internal override unsafe void ReadToken(ParseContext context)
{
char currentChar = context.Str[context.Pos];
if (currentChar != ')' && currentChar != '）')
{
return;
}
TokenType lastToken = context._lastTokenType;
if (lastToken == TokenType.LeftParenthesis)
{
context.SetFail("空括号。");
return;
}
if (lastToken != TokenType.RandomOperand && lastToken != TokenType.Int32Operand && lastToken != TokenType.RightParenthesis)
{
context.SetFail("错误的右括号。");
return;
}
while (!context.StackEmpty)
{
TokenType topType = context.StackTop.Type;
if (topType == TokenType.LeftParenthesis)
{
context._lastTokenType = Type;
context.Pop();
context.Pos++;
if (!context.StackEmpty && context.StackTop.Type == TokenType.Function)
{
context.Enqueue(context.Pop());
}
return;
}
if (topType != TokenType.BinaryOperator)
{
break;
}
context.Enqueue(context.Pop());
}
context.SetFail("不匹配的括号。");
}
private static void UpdateBinaryOperatorNotFixPos(BinaryOperator token, ParseContext context)
{
while (!context.StackEmpty)
{
Token top = context.StackTop;
if (top.Type != TokenType.BinaryOperator ||
token.Precedence < (top as BinaryOperator).Precedence)
{
break;
}
context.Enqueue(context.Pop());
}
context.Push(token);
}
