public abstract void Visit(VariableExpression expression);
public override void Visit(VariableExpression expression)
{
this.writer.Write(ToVariableName(expression.Name));
}
public override void Visit(VariableExpression expression)
{
this.block.CompileGet(expression.Name);
}
private IExpression ParseHeadExpression()
{
Token token = this.NextToken();
if (token == null)
return null;
switch (token.Type)
{
case TokenType.Name:
if (token.Value == "self")
return new SelfExpression();
if (token.Value == "true")
return new ConstantExpression(true);
if (token.Value == "false")
return new ConstantExpression(false);
if (token.Value == "nil" || token.Value == "null")
return new ConstantExpression(null);
if (this.@class != null && this.isClassMethod == false && [email protected](token.Value))
return new InstanceVariableExpression(token.Value);
if (this.@class != null && this.isClassMethod == true && [email protected](token.Value))
return new ClassVariableExpression(token.Value, this.@class);
return new VariableExpression(token.Value);
case TokenType.DottedName:
string[] names = token.Value.Split('.');
IExpression expr = new VariableExpression(names[0]);
foreach (var name in names.Skip(1))
expr = new MessageExpression(expr, "at:", new IExpression[] { new ConstantExpression(name) });
return expr;
case TokenType.String:
return new ConstantExpression(token.Value);
case TokenType.Character:
return new ConstantExpression(token.Value[0]);
case TokenType.Symbol:
return new SymbolExpression(token.Value);
case TokenType.Operator:
if (token.Value == "<")
return this.ParsePrimitive();
if (token.Value == "-")
return new MessageExpression(this.ParseHeadExpression(), "-", null);
break;
case TokenType.Punctuation:
if (token.Value == "[")
{
var result = this.ParseInternalBlock();
this.ParseToken(TokenType.Punctuation, "]");
return result;
}
if (token.Value == "#(")
return this.ParseArray();
if (token.Value == "#[")
return this.ParseByteArray();
if (token.Value == "{")
return this.ParseDynamicArray();
if (token.Value == "(")
{
IExpression expression = this.ParseExpression();
Token lasttoken = this.NextToken();
if (lasttoken == null || lasttoken.Type != TokenType.Punctuation || lasttoken.Value != ")")
{
this.PushToken(lasttoken);
return this.ParseExpression(expression);
}
return expression;
}
break;
case TokenType.Integer:
long value = 0;
int position = token.Value.IndexOf('r');
if (position > 0)
{
string strradix = token.Value.Substring(0, position);
string strnumber = token.Value.Substring(position + 1);
value = Convert.ToInt64(strnumber, Convert.ToInt32(strradix));
}
else
value = Convert.ToInt64(token.Value);
if (value > int.MaxValue || value < int.MinValue)
return new ConstantExpression(value);
else
return new ConstantExpression((int)value);
case TokenType.Real:
return new ConstantExpression(Convert.ToDouble(token.Value, CultureInfo.InvariantCulture));
}
this.PushToken(token);
return null;
}