Crate ra_ap_tt

tt crate defines a TokenTree data structure: this is the interface (both input and output) of macros.

The TokenTree is semantically a tree, but for performance reasons it is stored as a flat structure.

Modules

buffer

Stateful iteration over token trees.

iter

A “Parser” structure for token trees. We use this when parsing a declarative macro definition into a list of patterns and templates.

Structs

DelimSpan

Delimiter

Ident

Identifier or keyword.

Lit

Literal

Punct

Subtree

SubtreeBuilderRestorePoint

SubtreeView

TextRange

A range in text, represented as a pair of TextSize.

TextSize

A measure of text length. Also, equivalently, an index into text.

TokenTreesView

TopSubtree

TopSubtreeBuilder

Enums

DelimiterKind

IdentIsRaw

Leaf

LitKind

Spacing

Indicates whether a token can join with the following token to form a compound token. Used for conversions to proc_macro::Spacing. Also used to guide pretty-printing, which is where the JointHidden value (which isn’t part of proc_macro::Spacing) comes in useful.

TokenTree

Constants

MAX_GLUED_PUNCT_LEN

Functions

pretty

token_to_literal