# Macro synstructure::decl_derive [−] [src]

    macro_rules! decl_derive {
        ([$derives:ident $($derive_t:tt)*] => $inner:path) => { ... };
    }

The `decl_derive!` macro declares a custom derive wrapper. It will parse the incoming TokenStream into a `synstructure::Structure` object, and pass it into the inner function.

Your inner function should have the following type:

    fn derive(input: synstructure::Structure) -> quote::Tokens {
        // Your body here
    }

# Usage

ⓘThis example is not tested

    fn derive_interesting(mut input: synstructure::Structure) -> quote::Tokens {
        // Your body here
    }
    decl_derive!([Interesting, attributes(interesting_ignore)] => derive_interesting);

# Help

## Keyboard Shortcuts

`?`
  Show this help dialog
`S`
  Focus the search field
`↑`
  Move up in search results
`↓`
  Move down in search results
`↹`
  Switch tab
`⏎`
  Go to active search result
`+`
  Expand all sections
`-`
  Collapse all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)