Enhancements to Macro Examples

[Matejkob]

Description

• Add unit tests @Matejkob Enhancements to Macro Examples: Unit Tests and Code Organization #2163
• Make implementations of all macros consistent
• Change nodes modification to use variable setters instead of with approach @Matejkob Refactor syntax node manipulation to use variable setters #2278
• Add DocC tutorials for Accessor Macros
• Add DocC tutorials for Declaration Macros
• Add DocC tutorials for Expression Macros
• Add DocC tutorials for Extension Macros
• Add DocC tutorials for Member Macros
• Add DocC tutorials for MemberAttribute Macros
• Add DocC tutorials for Peer Macros
• Add an example of Accessor Macro
• Add an example of Declaration Macro
• Add an example of Extension Macro @Matejkob Add extension macro example #2305

[ahoppen]

Tracked in Apple’s issue tracker as rdar://115159302

[natikgadzhi]

@Matejkob, is the link to #2168 intentional? Help with unit tests is very welcome — I would be happy to learn from you!

[Matejkob]

@Matejkob, is the link to #2168 intentional? Help with unit tests is very welcome — I would be happy to learn from you!

Oh, I've added the wrong link. Thanks!