本文整理汇总了C#中System.IO.Peek方法的典型用法代码示例。如果您正苦于以下问题：C# System.IO.Peek方法的具体用法？C# System.IO.Peek怎么用？C# System.IO.Peek使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.IO的用法示例。
在下文中一共展示了System.IO.Peek方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Scan
private void Scan(IO.TextReader input)
{
while (input.Peek() != -1)
{
char ch = (char)input.Peek();
// Scan individual tokens
if (char.IsWhiteSpace(ch))
{
// eat the current char and skip ahead!
input.Read();
}
else if (char.IsLetter(ch) || ch == '_')
{
// keyword or identifier
Text.StringBuilder accum = new Text.StringBuilder();
while (char.IsLetter(ch) || ch == '_')
{
accum.Append(ch);
input.Read();
if (input.Peek() == -1)
{
break;
}
else
{
ch = (char)input.Peek();
}
}
this.result.Add(accum.ToString());
}
else if (ch == '"')
{
// string literal
Text.StringBuilder accum = new Text.StringBuilder();
input.Read(); // skip the '"'
if (input.Peek() == -1)
{
throw new System.Exception("unterminated string literal");
}
while ((ch = (char)input.Peek()) != '"')
{
accum.Append(ch);
input.Read();
if (input.Peek() == -1)
{
throw new System.Exception("unterminated string literal");
}
}
// skip the terminating "
input.Read();
this.result.Add(accum);
}
else if (char.IsDigit(ch))
{
// numeric literal
Text.StringBuilder accum = new Text.StringBuilder();
while (char.IsDigit(ch))
{
accum.Append(ch);
input.Read();
if (input.Peek() == -1)
{
break;
}
else
{
ch = (char)input.Peek();
}
}
this.result.Add(int.Parse(accum.ToString()));
}
else switch (ch)
{
case '+':
input.Read();
this.result.Add(Scanner.Add);
break;
case '-':
input.Read();
this.result.Add(Scanner.Sub);
break;
case '*':
input.Read();
this.result.Add(Scanner.Mul);
//.........这里部分代码省略.........
示例2: Scan
private void Scan(IO.TextReader input)
{
while (input.Peek() != -1)
{
char caracter = (char)input.Peek();
// Scan individual tokens
if (char.IsWhiteSpace(caracter))
{
// eat the current char and skip ahead!
input.Read();
}
else if (char.IsLetter(caracter) || caracter == '_')
{
// keyword or identifier
Text.StringBuilder accum = new Text.StringBuilder();
while (char.IsLetter(caracter) || caracter == '_')
{
accum.Append(caracter);
input.Read();
if (input.Peek() == -1)
{
break;
}
else
{
caracter = (char)input.Peek();
}
}
this.resultado.Add(accum.ToString());
}
else if (caracter == '"')
{
// string literal
Text.StringBuilder accum = new Text.StringBuilder();
input.Read(); // skip the '"'
if (input.Peek() == -1)
{
throw new System.Exception("Cadena sin terminar");
}
while ((caracter = (char)input.Peek()) != '"')
{
accum.Append(caracter);
input.Read();
if (input.Peek() == -1)
{
throw new System.Exception("Cadena sin terminar");
}
}
// skip the terminating "
input.Read();
this.resultado.Add(accum);
}
else if (char.IsDigit(caracter))
{
// numeric literal
Text.StringBuilder accum = new Text.StringBuilder();
while (char.IsDigit(caracter))
{
accum.Append(caracter);
input.Read();
if (input.Peek() == -1)
{
break;
}
else
{
caracter = (char)input.Peek();
}
}
this.resultado.Add(int.Parse(accum.ToString()));
}
else switch (caracter)
{
case '+':
input.Read();
this.resultado.Add(Scanner.Sum);
break;
case '-':
input.Read();
this.resultado.Add(Scanner.Res);
break;
case '*':
input.Read();
this.resultado.Add(Scanner.Mul);
//.........这里部分代码省略.........