Skip to content

Add section about lib function visibility in macro #662

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
straight-shoota merged 4 commits into from
Jan 9, 2023
Merged

Add section about lib function visibility in macro #662

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
158283f
Add section about `lib` function visibility in macro
straight-shoota Jan 7, 2023
700710b
Update docs/syntax_and_semantics/c_bindings/lib.md
straight-shoota Jan 7, 2023
9b76af4
Update docs/syntax_and_semantics/c_bindings/lib.md
straight-shoota Jan 9, 2023
a7ec17d
Add reference to `TypeNode#methods`
straight-shoota Jan 9, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 12 additions & 0 deletions docs/syntax_and_semantics/c_bindings/lib.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -17,3 +17,15 @@ Attributes are used to pass flags to the linker to find external libraries:
* `@[Link(framework: "Cocoa")]` will pass `-framework Cocoa` to the linker (only useful in macOS).

Attributes can be omitted if the library is implicitly linked, as in the case of libc.

## Reflection

Lib functions are visible in the macro language anywhere in the program using the method [`TypeNode#methods`](https://crystal-lang.org/api/Crystal/Macros/TypeNode.html#methods%3AArrayLiteral%28Def%29-instance-method):

```crystal
lib LibFoo
fun foo
end

{{ LibFoo.methods }} # => [fun foo]
Comment thread
straight-shoota marked this conversation as resolved.
```