/// <summary>
/// 读取函数参数
/// </summary>
/// <returns></returns>
Expression[] ReadArguments()
{
List<Expression> exps = new List<Expression>();
Continue(Token.TokenKind.LParen);
int index=0;
while(true)
{
if (currentToken.Kind == Token.TokenKind.RParen)
{
Continue();
break;
}
if (index > 0)
Continue(Token.TokenKind.Comma);
if(currentToken.Kind==Token.TokenKind.Integer)
{
Token arg = Continue(Token.TokenKind.Integer);
IntegerExpression integer = new IntegerExpression(arg.Line, arg.Col, int.Parse(arg.Text));
exps.Add(integer);
}
if(currentToken.Kind==Token.TokenKind.Double)
{
Token arg = Continue(Token.TokenKind.Double);
DoubleExpression d = new DoubleExpression(arg.Line, arg.Col, double.Parse(arg.Text));
exps.Add(d);
}
if (currentToken.Kind == Token.TokenKind.ExpStart)
exps.Add(ReadExpression());
if (currentToken.Kind == Token.TokenKind.StringStart)
exps.Add(ReadString());
index++;
}
return exps.ToArray();
}
/// <summary>
/// 读取双引号中间的元素
/// </summary>
/// <returns></returns>
Expression ReadString()
{
Continue(Token.TokenKind.StringStart);
CellectionExpression Exp = new CellectionExpression(currentToken.Line, currentToken.Col);
while (true)
{
if (currentToken.Kind == Token.TokenKind.ExpStart)
{
Exp.Add(ReadExpression());
}
else if (currentToken.Kind == Token.TokenKind.StringText)
{
Token value = Continue(Token.TokenKind.StringText);
StringExpression se = new StringExpression(currentToken.Line, currentToken.Col, value.Text);
Exp.Add(se);
}
else if (currentToken.Kind == Token.TokenKind.Integer)
{
Token token = Continue(Token.TokenKind.Integer);
IntegerExpression integer = new IntegerExpression(token.Line, token.Col, int.Parse(token.Text));
Exp.Add(integer);
}
else if (currentToken.Kind == Token.TokenKind.Double)
{
Token d = Continue(Token.TokenKind.Double);
DoubleExpression dexp = new DoubleExpression(d.Line, d.Col, double.Parse(d.Text));
Exp.Add(dexp);
}
else if (currentToken.Kind == Token.TokenKind.StringEnd)
{
Continue();
break;
}
else if (currentToken.Kind == Token.TokenKind.EOF)
{
throw new ParserException("不是期望的Token", currentToken);
}
else
throw new ParserException("不是期望的Token", currentToken);
}
if (Exp.Expressions.Count == 1)
return Exp.Expressions[0];
else
return Exp;
}