String right = buffer.readIdentifier();
        if (right == null) {
            // Need another identifier
            buffer.pos = pos;
            return null;
        }
        ComplexExpression concatExpression = new ComplexExpression(IncludeType.TOKEN_CONCATENATION, null, Arrays.<Expression>asList(new SimpleExpression(leftToken, IncludeType.IDENTIFIER), new SimpleExpression(right, IncludeType.IDENTIFIER)));

                return new ComplexExpression(type, expressionValue, args);
            } else if (tag == COMPLEX_MULTIPLE_ARGS) {
                String expressionValue = decoder.readNullableString();
                IncludeType type = enumSerializer.read(decoder);
                List<Expression> args = ImmutableList.copyOf(argsSerializer.read(decoder));
                return new ComplexExpression(type, expressionValue, args);

            if (value.getType() != IncludeType.IDENTIFIER) {
                visitor.visitUnresolved();
                continue;
            }
            ComplexExpression macroExpression = new ComplexExpression(IncludeType.MACRO_FUNCTION, value.getValue(), args.getArguments());
            if (headExpressions.isEmpty()) {
                resolveExpression(visibleMacros, macroExpression, visitor, tokenLookup);