[5.9] [Macros] Enable freestanding macros at module scope in script mode #67114
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Eliminate the error message
error: global freestanding macros not yet supported in script mode
by implementing name lookup, type checking, and code emission for
freestanding macros. The key problem here is that, in script mode,
it is ambiguous whether a use of a freestanding macro is an expression
or a declaration. We parse as an expression (as we do within a
function body), which then gets wrapped in a top-level code
declaration.
Teach various parts of the compiler to look through a top-level code
declaration wrapping a macro expansion expression that is for a
declaration or code-item macro, e.g., by recording these for global
name lookup and treating their expansions as "auxiliary" declarations.
Fixes rdar://109699501.
|
@swift-ci please test |
hborla
approved these changes
Jul 4, 2023
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Eliminate the error message
by implementing name lookup, type checking, and code emission for freestanding macros. The key problem here is that, in script mode, it is ambiguous whether a use of a freestanding macro is an expression or a declaration. We parse as an expression (as we do within a function body), which then gets wrapped in a top-level code declaration.
Teach various parts of the compiler to look through a top-level code declaration wrapping a macro expansion expression that is for a declaration or code-item macro, e.g., by recording these for global name lookup and treating their expansions as "auxiliary" declarations.
Fixes rdar://109699501.