Module metavar_expr 

Re-exports

use rustc_ast::token; 🔒

use rustc_ast::token::Delimiter; 🔒

use rustc_ast::token::IdentKind; 🔒

use rustc_ast::token::Lit; 🔒

use rustc_ast::token::Token; 🔒

use rustc_ast::token::TokenKind; 🔒

use rustc_ast::tokenstream::TokenStream; 🔒

use rustc_ast::tokenstream::TokenStreamIter; 🔒

use rustc_ast::tokenstream::TokenTree; 🔒

use rustc_ast::LitIntType; 🔒

use rustc_ast::LitKind; 🔒

use rustc_ast_pretty::pprust; 🔒

use rustc_errors::Applicability; 🔒

use rustc_errors::PResult; 🔒

use rustc_macros::Decodable; 🔒

use rustc_macros::Encodable; 🔒

use rustc_session::parse::ParseSess; 🔒

use rustc_span::Ident; 🔒

use rustc_span::Span; 🔒

use rustc_span::Symbol; 🔒

use rustc_span::sym; 🔒

use crate::diagnostics; 🔒

Enums

MetaVarExpr 🔒

A meta-variable expression, for expansions based on properties of meta-variables.

MetaVarExprConcatElem 🔒

Indicates what is placed in a concat parameter. For example, literals (${concat("foo", "bar")}) or adhoc identifiers (${concat(foo, bar)}).

Constants

UNSUPPORTED_CONCAT_ELEM_ERR 🔒

Functions

check_trailing_tokens 🔒

Checks if there are any remaining tokens (for example, ${ignore($valid, extra)}) and create a diag with the correct arg count if so.

eat_dollar 🔒

Expects that the next item is a dollar sign.

iter_span 🔒

Returns a span encompassing all tokens in the iterator if there is at least one item.

parse_concat 🔒

Parse a meta-variable concat expression: concat($metavar, ident, ...).

parse_count 🔒

Parse a meta-variable count expression: count(ident[, depth])

parse_depth 🔒

Parses the depth used by index(depth) and len(depth).

parse_ident 🔒

Parses an generic ident

parse_ident_from_token 🔒

parse_token 🔒

try_eat_comma 🔒

Tries to move the iterator forward returning true if there is a comma. If not, then the iterator is not modified and the result is false.

try_eat_dollar 🔒

Tries to move the iterator forward returning true if there is a dollar sign. If not, then the iterator is not modified and the result is false.

validate_ident_kind 🔒