// class ::= "class" ident [ ":" ident ] class_block
private SyntaxClassNode ParseClassNode()
{
if (!TokenStream_.TakeExpect(TokenType.Keyword, "class", out Token Tok))
{
ExitCode_ = new ExitUnexpectedSymbolCode(Tok);
return(null);
}
if (!TokenStream_.TakeExpect(TokenType.Identifier, out Token ClassName))
{
ExitCode_ = new ExitUnexpectedSymbolCode(ClassName);
return(null);
}
SyntaxIdentifierNode BaseClassIdentNode = null;
if (TokenStream_.PeekExpect(TokenType.Delimiter, ":"))
{
// skip ":"
TokenStream_.Take();
if (!TokenStream_.TakeExpect(TokenType.Identifier, out Token BaseName))
{
ExitCode_ = new ExitUnexpectedSymbolCode(BaseName);
return(null);
}
BaseClassIdentNode = new SyntaxIdentifierNode(BaseName);
}
var ClassBodyNode = ParseClassBodyNode();
if (ClassBodyNode == null)
{
return(null);
}
return(new SyntaxClassNode(ClassName.Code, ClassBodyNode, BaseClassIdentNode));
}
public SyntaxDotClassExpressionNode(SyntaxIdentifierNode ClassIdentNode, SyntaxIdentifierNode CallIdentNode)
: base(new Token(TokenType.Operator, "."), ClassIdentNode, CallIdentNode)
{
}
public LiteValue Visit(SyntaxIdentifierNode Node, LiteEnv Env)
{
return(Env.Get(Node.GetValue()));
}
public SyntaxClassNode(string ClassName, SyntaxClassBodyStatementNode BlockNode, SyntaxIdentifierNode BaseClassIdentNode)
: base(BlockNode, BaseClassIdentNode)
{
ClassName_ = ClassName;
}
