[C# 12]: New Experimental Feature - Interceptors #35878
Description
Visual Studio release
Other (please put exact version in description textbox)
Link to speclet
Link to Pull request
New behavior
Added in 17.7, preview 3.
Because this is an experimental feature, at this time, we're only adding a note in the What's new page, and covering new compiler warnings and errors.
An interceptor is a method which can declaratively substitute a call to an interceptable method with a call to itself at compile time. This substitution occurs by having the interceptor declare the source locations of the calls that it intercepts. This provides a limited facility to change the semantics of existing code by adding new code to a compilation (e.g. in a source generator).
Areas affected
- Add to What's new in C# 12: Add links to updated docs in the What's new in C# 12 article.
- Update language reference: Detail the areas in the language reference that will be updated for this feature.
- Update compiler messages: Add new (or updated) pages for new compiler messages. Include related message.
- Include in Everyday C# section*: Is this new feature included in Everyday C#?
- Tutorials: Are new tutorials required for this feature? If so, detail below
Language reference tasks
- N/A for an experimental feature. We'll add more as the feature spec coalesces more.
Tutorial tasks
No response
Everyday C# tasks
No response