swift

44d77692 - [Parser] Decouple the parser from AST creation (part 1)

[Parser] Decouple the parser from AST creation (part 1) Instead of creating the AST directly in the parser (and libSyntax or SwiftSyntax via SyntaxParsingContext), make Parser to explicitly create a tree of ParsedSyntaxNodes. Their OpaqueSyntaxNodes can be either libSyntax or SwiftSyntax. If AST is needed, it can be generated from the libSyntax tree.