[−][src]Crate ra_ap_syntax

Syntax Tree library used throughout the rust analyzer.

Properties:

easy and fast incremental re-parsing
graceful handling of errors
full-fidelity representation (any text can be precisely represented as a syntax tree)

For more information, see the RFC. Current implementation is inspired by the Swift one.

The most interesting modules here are syntax_node (which defines concrete syntax tree) and ast (which defines abstract syntax tree on top of the CST). The actual parser live in a separate parser crate, though the lexer lives in this crate.

See api_walkthrough test in this file for a quick API tour!

Re-exports

pub use crate::algo::InsertPosition;

pub use crate::ast::AstNode;

pub use crate::ast::AstToken;

Modules

algo	FIXME: write short doc here
ast	Abstract Syntax Tree, layered on top of untyped `SyntaxNode`s

Macros

T
match_ast	Matches a `SyntaxNode` against an `ast` type.

Structs

AstPtr	Like `SyntaxNodePtr`, but remembers the type of node
GreenNode	Internal node in the immutable tree. It has other nodes and tokens as children.
Parse	`Parse` is the result of the parsing: a syntax tree and a collection of errors.
SmolStr	A `SmolStr` is a string type that has the following properties:
SourceFile
SyntaxError	Represents the result of unsuccessful tokenization, parsing or tree validation.
SyntaxNodePtr	A pointer to a syntax node inside a file. It can be used to remember a specific node across reparses of the same file.
SyntaxText
SyntaxTreeBuilder
TextRange	A range in text, represented as a pair of `TextSize`.
TextSize	A measure of text length. Also, equivalently, an index into text.
Token	A token of Rust source.

Enums

Direction
NodeOrToken
SyntaxKind	The kind of syntax node, e.g. `IDENT`, `USE_KW`, or `STRUCT`.
TokenAtOffset	There might be zero, one or two leaves at a given offset.
WalkEvent	`WalkEvent` describes tree walking process.

Functions

lex_single_syntax_kind	Returns `SyntaxKind` and `Option<SyntaxError>` of the first token encountered at the beginning of the string.
lex_single_valid_syntax_kind	The same as `lex_single_syntax_kind()` but returns only `SyntaxKind` and returns `None` if any tokenization error occured.
tokenize	Break a string up into its component tokens. Beware that it checks for shebang first and its length contributes to resulting tokens offsets.

Type Definitions

SyntaxElement
SyntaxElementChildren
SyntaxNode
SyntaxNodeChildren
SyntaxToken