Struct syntax::config::StripUnconfigured

pub struct StripUnconfigured<'a> {
    pub sess: &'a ParseSess,
    pub features: Option<&'a Features>,
}

A folder that strips out items that do not belong in the current configuration.

Fields

sess: &'a ParseSess

features: Option<&'a Features>

Methods

impl<'a> StripUnconfigured<'a>

pub fn configure<T: HasAttrs>(&mut self, node: T) -> Option<T>

pub fn process_cfg_attrs<T: HasAttrs>(&mut self, node: T) -> T

Parse and expand all cfg_attr attributes into a list of attributes that are within each cfg_attr that has a true configuration predicate.

Gives compiler warnigns if any cfg_attr does not contain any attributes and is in the original source code. Gives compiler errors if the syntax of any cfg_attr is incorrect.

pub fn in_cfg(&mut self, attrs: &[Attribute]) -> bool

Determine if a node with the given attributes should be included in this configuration.

pub fn maybe_emit_expr_attr_err(&self, attr: &Attribute)

If attributes are not allowed on expressions, emit an error for attr

pub fn configure_foreign_mod(&mut self, foreign_mod: ForeignMod) -> ForeignMod

pub fn configure_item_kind(&mut self, item: ItemKind) -> ItemKind

pub fn configure_expr_kind(&mut self, expr_kind: ExprKind) -> ExprKind

pub fn configure_expr(&mut self, expr: P<Expr>) -> P<Expr>

pub fn configure_stmt(&mut self, stmt: Stmt) -> Option<Stmt>

pub fn configure_struct_expr_field(&mut self, field: Field) -> Option<Field>

pub fn configure_pat(&mut self, pattern: P<Pat>) -> P<Pat>

pub fn disallow_cfg_on_generic_param(&mut self, param: &GenericParam)

Trait Implementations

impl<'a> Folder for StripUnconfigured<'a>

fn fold_foreign_mod(&mut self, foreign_mod: ForeignMod) -> ForeignMod

fn fold_item_kind(&mut self, item: ItemKind) -> ItemKind

fn fold_expr(&mut self, expr: P<Expr>) -> P<Expr>

fn fold_opt_expr(&mut self, expr: P<Expr>) -> Option<P<Expr>>

fn fold_stmt(&mut self, stmt: Stmt) -> SmallVec<[Stmt; 1]>

fn fold_item(&mut self, item: P<Item>) -> SmallVec<[P<Item>; 1]>

fn fold_impl_item(&mut self, item: ImplItem) -> SmallVec<[ImplItem; 1]>

fn fold_trait_item(&mut self, item: TraitItem) -> SmallVec<[TraitItem; 1]>

fn fold_mac(&mut self, mac: Mac) -> Mac

fn fold_pat(&mut self, pattern: P<Pat>) -> P<Pat>

fn fold_crate(&mut self, c: Crate) -> Crate

fn fold_meta_items(&mut self, meta_items: Vec<MetaItem>) -> Vec<MetaItem>

fn fold_meta_list_item(&mut self, list_item: NestedMetaItem) -> NestedMetaItem

fn fold_meta_item(&mut self, meta_item: MetaItem) -> MetaItem

fn fold_use_tree(&mut self, use_tree: UseTree) -> UseTree

fn fold_foreign_item(&mut self, ni: ForeignItem) -> SmallVec<[ForeignItem; 1]>

fn fold_foreign_item_simple(&mut self, ni: ForeignItem) -> ForeignItem

fn fold_item_simple(&mut self, i: Item) -> Item

fn fold_fn_header(&mut self, header: FnHeader) -> FnHeader

fn fold_struct_field(&mut self, sf: StructField) -> StructField

fn fold_fn_decl(&mut self, d: P<FnDecl>) -> P<FnDecl>

fn fold_asyncness(&mut self, a: IsAsync) -> IsAsync

fn fold_block(&mut self, b: P<Block>) -> P<Block>

fn fold_arm(&mut self, a: Arm) -> Arm

fn fold_guard(&mut self, g: Guard) -> Guard

fn fold_anon_const(&mut self, c: AnonConst) -> AnonConst

fn fold_range_end(&mut self, re: RangeEnd) -> RangeEnd

fn fold_exprs(&mut self, es: Vec<P<Expr>>) -> Vec<P<Expr>>

fn fold_generic_arg(&mut self, arg: GenericArg) -> GenericArg

fn fold_ty(&mut self, t: P<Ty>) -> P<Ty>

fn fold_lifetime(&mut self, l: Lifetime) -> Lifetime

fn fold_ty_binding(&mut self, t: TypeBinding) -> TypeBinding

fn fold_mod(&mut self, m: Mod) -> Mod

fn fold_global_asm(&mut self, ga: P<GlobalAsm>) -> P<GlobalAsm>

fn fold_variant(&mut self, v: Variant) -> Variant

fn fold_ident(&mut self, i: Ident) -> Ident

fn fold_usize(&mut self, i: usize) -> usize

fn fold_path(&mut self, p: Path) -> Path

fn fold_qpath(&mut self, qs: Option<QSelf>, p: Path) -> (Option<QSelf>, Path)

fn fold_generic_args(&mut self, p: GenericArgs) -> GenericArgs

fn fold_angle_bracketed_parameter_data(     &mut self,     p: AngleBracketedArgs ) -> AngleBracketedArgs

fn fold_parenthesized_parameter_data(     &mut self,     p: ParenthesisedArgs ) -> ParenthesisedArgs

fn fold_local(&mut self, l: P<Local>) -> P<Local>

fn fold_macro_def(&mut self, def: MacroDef) -> MacroDef

fn fold_label(&mut self, label: Label) -> Label

fn fold_attribute(&mut self, at: Attribute) -> Option<Attribute>

fn fold_arg(&mut self, a: Arg) -> Arg

fn fold_generics(&mut self, generics: Generics) -> Generics

fn fold_trait_ref(&mut self, p: TraitRef) -> TraitRef

fn fold_poly_trait_ref(&mut self, p: PolyTraitRef) -> PolyTraitRef

fn fold_variant_data(&mut self, vdata: VariantData) -> VariantData

fn fold_generic_param(&mut self, param: GenericParam) -> GenericParam

fn fold_generic_params(     &mut self,     params: Vec<GenericParam> ) -> Vec<GenericParam>

fn fold_tt(&mut self, tt: TokenTree) -> TokenTree

fn fold_tts(&mut self, tts: TokenStream) -> TokenStream

fn fold_token(&mut self, t: Token) -> Token

fn fold_interpolated(&mut self, nt: Nonterminal) -> Nonterminal

fn fold_opt_bounds(&mut self, b: Option<GenericBounds>) -> Option<GenericBounds>

fn fold_bounds(&mut self, b: GenericBounds) -> GenericBounds

fn fold_param_bound(&mut self, tpb: GenericBound) -> GenericBound

fn fold_mt(&mut self, mt: MutTy) -> MutTy

fn fold_field(&mut self, field: Field) -> Field

fn fold_where_clause(&mut self, where_clause: WhereClause) -> WhereClause

fn fold_where_predicate(     &mut self,     where_predicate: WherePredicate ) -> WherePredicate

fn fold_vis(&mut self, vis: Visibility) -> Visibility

fn new_id(&mut self, i: NodeId) -> NodeId

fn new_span(&mut self, sp: Span) -> Span