Function ParseModifiers

Source/SpireCore/Parser.cpp:527–649

        }

        static Modifiers ParseModifiers(Parser* parser)
        {
            Modifiers modifiers;
            RefPtr<Modifier>* modifierLink = &modifiers.first;
            for (;;)
            {
                if (AdvanceIf(parser, "in"))
                {
                    modifiers.flags |= ModifierFlag::In;
                }
                else if (AdvanceIf(parser, "input"))
                {
                    modifiers.flags |= ModifierFlag::Input;
                }
                else if (AdvanceIf(parser, "out"))
                {
                    modifiers.flags |= ModifierFlag::Out;
                }
                else if (AdvanceIf(parser, "uniform"))
                {
                    modifiers.flags |= ModifierFlag::Uniform;
                }
                else if (AdvanceIf(parser, "const"))
                {
                    modifiers.flags |= ModifierFlag::Const;
                }
                else if (AdvanceIf(parser, "instance"))
                {
                    modifiers.flags |= ModifierFlag::Instance;
                }
                else if (AdvanceIf(parser, "__builtin"))
                {
                    modifiers.flags |= ModifierFlag::Builtin;
                }
                else if (AdvanceIf(parser, "layout"))
				{
					parser->ReadToken(TokenType::LParent);
					StringBuilder layoutSB;
					while (!AdvanceIfMatch(parser, TokenType::RParent))
					{
						layoutSB.Append(parser->ReadToken(TokenType::Identifier).Content);
						if (parser->LookAheadToken(TokenType::OpAssign))
						{
							layoutSB.Append(parser->ReadToken(TokenType::OpAssign).Content);
							layoutSB.Append(parser->ReadToken(TokenType::IntLiterial).Content);
						}
						if (AdvanceIf(parser, TokenType::RParent))
							break;
						parser->ReadToken(TokenType::Comma);
						layoutSB.Append(", ");
					}

                    RefPtr<LayoutModifier> modifier = new LayoutModifier();
                    modifier->LayoutString = layoutSB.ProduceString();

                    *modifierLink = modifier;
                    modifierLink = &modifier->next;
				}