[GSOC]Integration of libSyntax with the rest of the compiler pipeline

[rintaro (Rintaro Ishizaki)]

@DexinLi

For 1and 2, Does the parser generate AST now? So I need to modify the parser to generate a libSyntax tree instead of an AST then derive the AST.

Your understanding is right.

To be accurate, the current Parser generates both AST and libSyntax tree. But I guess it's difficult to use the current libSyntax tree generation functionality for this task. Currently, it's like a by-product of AST parsing.

@DexinLi

For 3, If my understanding about libSyntax and AST is right, the typechecking and code-generation functionality should be operated on AST nodes instead of libSyntax tree. So I’m little confused about this step.

"the typechecking and code-generation functionality" == "the rest of the compiler pipe line" here.
For 3, it means:

Serialized libSyntax tree JSON —(JSON deserializer)—> libSyntax Tree —(to be implemented)—> AST —> IL