Method ResolveAttributes

Source/SpireCore/ShaderCompiler.cpp:37–73

			Dictionary<String, RefPtr<CodeGenBackend>> backends;

			void ResolveAttributes(SymbolTable * symTable)
			{
				for (auto & shader : symTable->ShaderDependenceOrder)
				{
					auto comps = shader->GetComponentDependencyOrder();
					for (auto & comp : comps)
					{
						for (auto & impl : comp->Implementations)
							for (auto attrib : impl->SyntaxNode->GetLayoutAttributes())
							{
								try
								{
									if (attrib->GetValue().StartsWith("%"))
									{
										CoreLib::Text::TokenReader parser(attrib->GetValue().SubString(1, attrib->GetValue().Length() - 1));
										auto compName = parser.ReadWord();
										parser.Read(".");
										auto compAttrib = parser.ReadWord();
										RefPtr<ShaderComponentSymbol> compSym;
										if (shader->Components.TryGetValue(compName, compSym))
										{
											for (auto & timpl : compSym->Implementations)
											{
												Token attribValue;
												if (timpl->SyntaxNode->FindSimpleAttribute(compAttrib, attribValue))
													attrib->Value = attribValue;
											}
										}
									}
								}
								catch (Exception)
								{
								}
							}
					}
				}
			}

			/* Generate a shader variant by applying mechanic choice rules and the choice file.
			   The choice file provides "preferred" definitions, as represented in ShaderComponentSymbol::Type::PinnedWorlds