Exemplo n.º 1
0
        void parseTemplateArgument()
        {
            currentTokenKind = TokenKind.VALUE;

            Token name = tokens[cursor += 1];

            if (name.type != TT.IDENTIFIER)
            {
                Jolly.unexpected(name);
            }
            AST_Template node     = new AST_Template(name.location);
            AST_Node     typeFrom = null;

            if (prevTokenKind == TokenKind.VALUE)
            {
                if (defineMode != DefineMode.TEMPLATE)
                {
                    throw Jolly.unexpected(token);
                }
                typeFrom = values.Pop();
                Debug.Assert(typeFrom != null);
            }

            DefineMode inferrableDefineMode = (DefineMode.TEMPLATE | DefineMode.ARGUMENT) & defineMode;

            if (canDefine && inferrableDefineMode != 0)
            {
                if (scope.template.TryGetValue(name.text, out node.item))
                {
                    if ((node.item.canBeInferredBy & defineMode) == DefineMode.TEMPLATE)
                    {
                        throw Jolly.addError(name.location, "Trying to redefine template argument ${0}".fill(name.text));
                    }
                    node.item.canBeInferredBy |= inferrableDefineMode;
                }
                else
                {
                    scope.template.Add(name.text, node.item = new TemplateItem {
                        canBeInferredBy = inferrableDefineMode,
                        constantValue   = typeFrom,
                        location        = node.location,
                        defineIndex     = defineIndex++,
                    });
                }
            }
            else
            {
                node.name = name.text;
            }

            values.Push(node);
            ast.Add(node);
        }
Exemplo n.º 2
0
        AST_Template[] parseTemplate(SymbolTable theScope)
        {
            var less = tokens[cursor + 1];

            if (less.type != TT.LESS)
            {
                return(null);
            }
            cursor += 2;
            var result = new ExpressionParser(parseData, TT.GREATER, theScope, DefineMode.TEMPLATE, end)
                         .parse(false)
                         .getValue();

            if (result == null)
            {
                return(null);
            }

            switch (result.nodeType)
            {
            case NT.TUPLE:
                var tuple   = (AST_Tuple)result;
                var returns = new AST_Template[tuple.values.Count];
                tuple.values.forEach((v, i) => {
                    if (v.nodeType != NT.TEMPLATE_NAME)
                    {
                        throw Jolly.unexpected(v);
                    }
                    returns[i] = (AST_Template)v;
                });
                return(returns);

            case NT.TEMPLATE_NAME:
                return(new AST_Template[] { (AST_Template)result });

            default:
                throw Jolly.unexpected(result);
            }
        }