src/doc/reference/src/macros.md

   1 # Macros
   2
   3 A number of minor features of Rust are not central enough to have their own
   4 syntax, and yet are not implementable as functions. Instead, they are given
   5 names, and invoked through a consistent syntax: `some_extension!(...)`.
   6
   7 Users of `rustc` can define new macros in two ways:
   8
   9 * [Macros] define new syntax in a higher-level,
  10   declarative way.
  11 * [Procedural Macros] can be used to implement custom derive.
  12
  13 And one unstable way: [compiler plugins].
  14
  15 [Macros]: ../book/macros.html
  16 [Procedural Macros]: ../book/procedural-macros.html
  17 [compiler plugins]: ../unstable-book/plugin.html