Module rustc_span::hygiene[][src]

Expand description

Machinery for hygienic macros.

Inspired by Matthew Flatt et al., “Macros That Work Together: Compile-Time Bindings, Partial Expansion, and Definition Contexts,” Journal of Functional Programming 22, no. 2 (March 1, 2012): 181–216, https://doi.org/10.1017/S0956796812000093.

Structs

A subset of properties from both macro definition and macro call available through global data. Avoid using this if you have access to the original definition or call structures.

A unique hash value associated to an expansion.

A unique ID associated with a macro invocation and expansion.

A unique ID associated with a macro invocation and expansion.

Additional information used to assist in decoding hygiene data

A unique ID associated with a macro invocation and expansion.

A SyntaxContext represents a chain of pairs (ExpnId, Transparency) named “marks”.

Enums

The kind of AST transform.

The kind of compiler desugaring.

Expansion kind.

The kind of macro invocation or definition.

A property of a macro expansion that determines how identifiers produced by that expansion are resolved.

Functions

Decode an expansion from the metadata of a foreign crate.

Register an expansion which has been decoded from the metadata of a foreign crate.

Register an expansion which has been decoded from the on-disk-cache for the local crate.

Updates the disambiguator field of the corresponding ExpnData such that the Fingerprint of the ExpnData does not collide with any other ExpnIds.