/// <summary>
/// 读取接下来的符号
/// </summary>
/// <param name="symbol"></param>
/// <param name="throwExceptionIfError"></param>
/// <returns></returns>
public bool ReadSymbol(string symbol, bool throwExceptionIfError)
{
// 跳过空格
while (char.IsWhiteSpace(this.Content[this.Index + this.Length]))
{
this.Length++;
}
if (throwExceptionIfError)
{
ParseException.Assert(this.Content.Substring(this.Index + this.Length, symbol.Length), symbol, this.Index);
}
else if (this.Content.Substring(this.Index + this.Length, symbol.Length) != symbol)
{
return(false);
}
this.Index += this.Length;
this.Length = symbol.Length;
return(true);
}