protected bool checkToken(TokenKind tokKind)
{
if (CurrentToken.Kind != tokKind)
{
error(CurrentToken, CurrentToken.ToCode() + "不正确,应该是" + Token.GetTextByKind(tokKind));
return(false);
}
else
{
return(true);
}
}
Stmt ParseAssignOrExprStmt( )
{
Exp startExpr = parseExp();
if (CurrentToken.Kind == TokenKind.Assign)
{
return(parseAssign(startExpr));
}
else if (CurrentToken.Kind == TokenKind.AssignTo)
{
return(parseAssignTo(startExpr));
}
else if (CurrentKind == TokenKind.Semi || CurrentKind == TokenKind.EOF || isNewLine())
{
return(parseCall(startExpr));
}
else
{
error("ParseAssignOrExprStmt 无法识别" + CurrentToken.ToCode());
return(null);
}
}
bool matchSemiOrNewLine()
{
if (CurrentKind == TokenKind.EOF)
{
return(true);
}
if (isNewLine())
{
return(true);
}
TokenKind semi = TokenKind.Semi;
if (CurrentToken.Kind != semi)
{
error(CurrentToken, CurrentToken.ToCode() + "不正确,应该是" + Token.GetTextByKind(semi));
return(false);
}
else
{
MoveNext();
return(true);
}
}
protected void report(string str, int color = 1)
{
ConsoleColor c = Console.ForegroundColor;
if (color == 1)
{
Console.ForegroundColor = ConsoleColor.White;
}
else if (color == 2)
{
Console.ForegroundColor = ConsoleColor.Green;
}
else if (color == 3)
{
Console.ForegroundColor = ConsoleColor.Yellow;
}
else if (color == 4)
{
Console.ForegroundColor = ConsoleColor.Blue;
}
Console.WriteLine("DEBUG:" + index + " [" + CurrentToken.Line + "," + CurrentToken.Col + "]:" + CurrentToken.ToCode() + " --- " + str);
Console.ForegroundColor = c;
}