| use rustc_ast as ast; |
| use rustc_ast::visit::{self, AssocCtxt, FnCtxt, FnKind, Visitor}; |
| use rustc_ast::{attr, AssocConstraint, AssocConstraintKind, NodeId}; |
| use rustc_ast::{PatKind, RangeEnd}; |
| use rustc_feature::{AttributeGate, BuiltinAttribute, Features, GateIssue, BUILTIN_ATTRIBUTE_MAP}; |
| use rustc_session::parse::{feature_err, feature_err_issue, feature_warn}; |
| use rustc_session::Session; |
| use rustc_span::source_map::Spanned; |
| use rustc_span::symbol::sym; |
| use rustc_span::Span; |
| use rustc_target::spec::abi; |
| use thin_vec::ThinVec; |
| use tracing::debug; |
| |
| use crate::errors; |
| |
| macro_rules! gate_feature_fn { |
| ($visitor: expr, $has_feature: expr, $span: expr, $name: expr, $explain: expr, $help: expr) => {{ |
| let (visitor, has_feature, span, name, explain, help) = |
| (&*$visitor, $has_feature, $span, $name, $explain, $help); |
| let has_feature: bool = has_feature(visitor.features); |
| debug!("gate_feature(feature = {:?}, span = {:?}); has? {}", name, span, has_feature); |
| if !has_feature && !span.allows_unstable($name) { |
| feature_err(&visitor.sess.parse_sess, name, span, explain).help(help).emit(); |
| } |
| }}; |
| ($visitor: expr, $has_feature: expr, $span: expr, $name: expr, $explain: expr) => {{ |
| let (visitor, has_feature, span, name, explain) = |
| (&*$visitor, $has_feature, $span, $name, $explain); |
| let has_feature: bool = has_feature(visitor.features); |
| debug!("gate_feature(feature = {:?}, span = {:?}); has? {}", name, span, has_feature); |
| if !has_feature && !span.allows_unstable($name) { |
| feature_err(&visitor.sess.parse_sess, name, span, explain).emit(); |
| } |
| }}; |
| (future_incompatible; $visitor: expr, $has_feature: expr, $span: expr, $name: expr, $explain: expr) => {{ |
| let (visitor, has_feature, span, name, explain) = |
| (&*$visitor, $has_feature, $span, $name, $explain); |
| let has_feature: bool = has_feature(visitor.features); |
| debug!( |
| "gate_feature(feature = {:?}, span = {:?}); has? {} (future_incompatible)", |
| name, span, has_feature |
| ); |
| if !has_feature && !span.allows_unstable($name) { |
| feature_warn(&visitor.sess.parse_sess, name, span, explain); |
| } |
| }}; |
| } |
| |
| macro_rules! gate_feature_post { |
| ($visitor: expr, $feature: ident, $span: expr, $explain: expr, $help: expr) => { |
| gate_feature_fn!($visitor, |x: &Features| x.$feature, $span, sym::$feature, $explain, $help) |
| }; |
| ($visitor: expr, $feature: ident, $span: expr, $explain: expr) => { |
| gate_feature_fn!($visitor, |x: &Features| x.$feature, $span, sym::$feature, $explain) |
| }; |
| (future_incompatible; $visitor: expr, $feature: ident, $span: expr, $explain: expr) => { |
| gate_feature_fn!(future_incompatible; $visitor, |x: &Features| x.$feature, $span, sym::$feature, $explain) |
| }; |
| } |
| |
| pub fn check_attribute(attr: &ast::Attribute, sess: &Session, features: &Features) { |
| PostExpansionVisitor { sess, features }.visit_attribute(attr) |
| } |
| |
| struct PostExpansionVisitor<'a> { |
| sess: &'a Session, |
| |
| // `sess` contains a `Features`, but this might not be that one. |
| features: &'a Features, |
| } |
| |
| impl<'a> PostExpansionVisitor<'a> { |
| fn check_abi(&self, abi: ast::StrLit, constness: ast::Const) { |
| let ast::StrLit { symbol_unescaped, span, .. } = abi; |
| |
| if let ast::Const::Yes(_) = constness { |
| match symbol_unescaped { |
| // Stable |
| sym::Rust | sym::C => {} |
| abi => gate_feature_post!( |
| &self, |
| const_extern_fn, |
| span, |
| format!("`{}` as a `const fn` ABI is unstable", abi) |
| ), |
| } |
| } |
| |
| match abi::is_enabled(&self.features, span, symbol_unescaped.as_str()) { |
| Ok(()) => (), |
| Err(abi::AbiDisabled::Unstable { feature, explain }) => { |
| feature_err_issue( |
| &self.sess.parse_sess, |
| feature, |
| span, |
| GateIssue::Language, |
| explain, |
| ) |
| .emit(); |
| } |
| Err(abi::AbiDisabled::Unrecognized) => { |
| if self.sess.opts.pretty.map_or(true, |ppm| ppm.needs_hir()) { |
| self.sess.parse_sess.span_diagnostic.delay_span_bug( |
| span, |
| format!( |
| "unrecognized ABI not caught in lowering: {}", |
| symbol_unescaped.as_str() |
| ), |
| ); |
| } |
| } |
| } |
| } |
| |
| fn check_extern(&self, ext: ast::Extern, constness: ast::Const) { |
| if let ast::Extern::Explicit(abi, _) = ext { |
| self.check_abi(abi, constness); |
| } |
| } |
| |
| /// Feature gate `impl Trait` inside `type Alias = $type_expr;`. |
| fn check_impl_trait(&self, ty: &ast::Ty, in_associated_ty: bool) { |
| struct ImplTraitVisitor<'a> { |
| vis: &'a PostExpansionVisitor<'a>, |
| in_associated_ty: bool, |
| } |
| impl Visitor<'_> for ImplTraitVisitor<'_> { |
| fn visit_ty(&mut self, ty: &ast::Ty) { |
| if let ast::TyKind::ImplTrait(..) = ty.kind { |
| if self.in_associated_ty { |
| gate_feature_post!( |
| &self.vis, |
| impl_trait_in_assoc_type, |
| ty.span, |
| "`impl Trait` in associated types is unstable" |
| ); |
| } else { |
| gate_feature_post!( |
| &self.vis, |
| type_alias_impl_trait, |
| ty.span, |
| "`impl Trait` in type aliases is unstable" |
| ); |
| } |
| } |
| visit::walk_ty(self, ty); |
| } |
| } |
| ImplTraitVisitor { vis: self, in_associated_ty }.visit_ty(ty); |
| } |
| |
| fn check_late_bound_lifetime_defs(&self, params: &[ast::GenericParam]) { |
| // Check only lifetime parameters are present and that the lifetime |
| // parameters that are present have no bounds. |
| let non_lt_param_spans: Vec<_> = params |
| .iter() |
| .filter_map(|param| match param.kind { |
| ast::GenericParamKind::Lifetime { .. } => None, |
| _ => Some(param.ident.span), |
| }) |
| .collect(); |
| // FIXME: gate_feature_post doesn't really handle multispans... |
| if !non_lt_param_spans.is_empty() && !self.features.non_lifetime_binders { |
| feature_err( |
| &self.sess.parse_sess, |
| sym::non_lifetime_binders, |
| non_lt_param_spans, |
| crate::fluent_generated::ast_passes_forbidden_non_lifetime_param, |
| ) |
| .emit(); |
| } |
| for param in params { |
| if !param.bounds.is_empty() { |
| let spans: Vec<_> = param.bounds.iter().map(|b| b.span()).collect(); |
| self.sess.emit_err(errors::ForbiddenLifetimeBound { spans }); |
| } |
| } |
| } |
| } |
| |
| impl<'a> Visitor<'a> for PostExpansionVisitor<'a> { |
| fn visit_attribute(&mut self, attr: &ast::Attribute) { |
| let attr_info = attr.ident().and_then(|ident| BUILTIN_ATTRIBUTE_MAP.get(&ident.name)); |
| // Check feature gates for built-in attributes. |
| if let Some(BuiltinAttribute { |
| gate: AttributeGate::Gated(_, name, descr, has_feature), |
| .. |
| }) = attr_info |
| { |
| gate_feature_fn!(self, has_feature, attr.span, *name, *descr); |
| } |
| // Check unstable flavors of the `#[doc]` attribute. |
| if attr.has_name(sym::doc) { |
| for nested_meta in attr.meta_item_list().unwrap_or_default() { |
| macro_rules! gate_doc { ($($name:ident => $feature:ident)*) => { |
| $(if nested_meta.has_name(sym::$name) { |
| let msg = concat!("`#[doc(", stringify!($name), ")]` is experimental"); |
| gate_feature_post!(self, $feature, attr.span, msg); |
| })* |
| }} |
| |
| gate_doc!( |
| cfg => doc_cfg |
| cfg_hide => doc_cfg_hide |
| masked => doc_masked |
| notable_trait => doc_notable_trait |
| ); |
| |
| if nested_meta.has_name(sym::keyword) { |
| let msg = "`#[doc(keyword)]` is meant for internal use only"; |
| gate_feature_post!(self, rustdoc_internals, attr.span, msg); |
| } |
| |
| if nested_meta.has_name(sym::fake_variadic) { |
| let msg = "`#[doc(fake_variadic)]` is meant for internal use only"; |
| gate_feature_post!(self, rustdoc_internals, attr.span, msg); |
| } |
| } |
| } |
| |
| // Emit errors for non-staged-api crates. |
| if !self.features.staged_api { |
| if attr.has_name(sym::unstable) |
| || attr.has_name(sym::stable) |
| || attr.has_name(sym::rustc_const_unstable) |
| || attr.has_name(sym::rustc_const_stable) |
| || attr.has_name(sym::rustc_default_body_unstable) |
| { |
| self.sess.emit_err(errors::StabilityOutsideStd { span: attr.span }); |
| } |
| } |
| } |
| |
| fn visit_item(&mut self, i: &'a ast::Item) { |
| match &i.kind { |
| ast::ItemKind::ForeignMod(foreign_module) => { |
| if let Some(abi) = foreign_module.abi { |
| self.check_abi(abi, ast::Const::No); |
| } |
| } |
| |
| ast::ItemKind::Fn(..) => { |
| if attr::contains_name(&i.attrs, sym::start) { |
| gate_feature_post!( |
| &self, |
| start, |
| i.span, |
| "`#[start]` functions are experimental \ |
| and their signature may change \ |
| over time" |
| ); |
| } |
| } |
| |
| ast::ItemKind::Struct(..) => { |
| for attr in attr::filter_by_name(&i.attrs, sym::repr) { |
| for item in attr.meta_item_list().unwrap_or_else(ThinVec::new) { |
| if item.has_name(sym::simd) { |
| gate_feature_post!( |
| &self, |
| repr_simd, |
| attr.span, |
| "SIMD types are experimental and possibly buggy" |
| ); |
| } |
| } |
| } |
| } |
| |
| ast::ItemKind::Impl(box ast::Impl { polarity, defaultness, of_trait, .. }) => { |
| if let &ast::ImplPolarity::Negative(span) = polarity { |
| gate_feature_post!( |
| &self, |
| negative_impls, |
| span.to(of_trait.as_ref().map_or(span, |t| t.path.span)), |
| "negative trait bounds are not yet fully implemented; \ |
| use marker types for now" |
| ); |
| } |
| |
| if let ast::Defaultness::Default(_) = defaultness { |
| gate_feature_post!(&self, specialization, i.span, "specialization is unstable"); |
| } |
| } |
| |
| ast::ItemKind::Trait(box ast::Trait { is_auto: ast::IsAuto::Yes, .. }) => { |
| gate_feature_post!( |
| &self, |
| auto_traits, |
| i.span, |
| "auto traits are experimental and possibly buggy" |
| ); |
| } |
| |
| ast::ItemKind::TraitAlias(..) => { |
| gate_feature_post!(&self, trait_alias, i.span, "trait aliases are experimental"); |
| } |
| |
| ast::ItemKind::MacroDef(ast::MacroDef { macro_rules: false, .. }) => { |
| let msg = "`macro` is experimental"; |
| gate_feature_post!(&self, decl_macro, i.span, msg); |
| } |
| |
| ast::ItemKind::TyAlias(box ast::TyAlias { ty: Some(ty), .. }) => { |
| self.check_impl_trait(&ty, false) |
| } |
| |
| _ => {} |
| } |
| |
| visit::walk_item(self, i); |
| } |
| |
| fn visit_foreign_item(&mut self, i: &'a ast::ForeignItem) { |
| match i.kind { |
| ast::ForeignItemKind::Fn(..) | ast::ForeignItemKind::Static(..) => { |
| let link_name = attr::first_attr_value_str_by_name(&i.attrs, sym::link_name); |
| let links_to_llvm = link_name.is_some_and(|val| val.as_str().starts_with("llvm.")); |
| if links_to_llvm { |
| gate_feature_post!( |
| &self, |
| link_llvm_intrinsics, |
| i.span, |
| "linking to LLVM intrinsics is experimental" |
| ); |
| } |
| } |
| ast::ForeignItemKind::TyAlias(..) => { |
| gate_feature_post!(&self, extern_types, i.span, "extern types are experimental"); |
| } |
| ast::ForeignItemKind::MacCall(..) => {} |
| } |
| |
| visit::walk_foreign_item(self, i) |
| } |
| |
| fn visit_ty(&mut self, ty: &'a ast::Ty) { |
| match &ty.kind { |
| ast::TyKind::BareFn(bare_fn_ty) => { |
| // Function pointers cannot be `const` |
| self.check_extern(bare_fn_ty.ext, ast::Const::No); |
| self.check_late_bound_lifetime_defs(&bare_fn_ty.generic_params); |
| } |
| ast::TyKind::Never => { |
| gate_feature_post!(&self, never_type, ty.span, "the `!` type is experimental"); |
| } |
| _ => {} |
| } |
| visit::walk_ty(self, ty) |
| } |
| |
| fn visit_generics(&mut self, g: &'a ast::Generics) { |
| for predicate in &g.where_clause.predicates { |
| match predicate { |
| ast::WherePredicate::BoundPredicate(bound_pred) => { |
| // A type binding, eg `for<'c> Foo: Send+Clone+'c` |
| self.check_late_bound_lifetime_defs(&bound_pred.bound_generic_params); |
| } |
| _ => {} |
| } |
| } |
| visit::walk_generics(self, g); |
| } |
| |
| fn visit_fn_ret_ty(&mut self, ret_ty: &'a ast::FnRetTy) { |
| if let ast::FnRetTy::Ty(output_ty) = ret_ty { |
| if let ast::TyKind::Never = output_ty.kind { |
| // Do nothing. |
| } else { |
| self.visit_ty(output_ty) |
| } |
| } |
| } |
| |
| fn visit_expr(&mut self, e: &'a ast::Expr) { |
| match e.kind { |
| ast::ExprKind::TryBlock(_) => { |
| gate_feature_post!(&self, try_blocks, e.span, "`try` expression is experimental"); |
| } |
| _ => {} |
| } |
| visit::walk_expr(self, e) |
| } |
| |
| fn visit_pat(&mut self, pattern: &'a ast::Pat) { |
| match &pattern.kind { |
| PatKind::Slice(pats) => { |
| for pat in pats { |
| let inner_pat = match &pat.kind { |
| PatKind::Ident(.., Some(pat)) => pat, |
| _ => pat, |
| }; |
| if let PatKind::Range(Some(_), None, Spanned { .. }) = inner_pat.kind { |
| gate_feature_post!( |
| &self, |
| half_open_range_patterns_in_slices, |
| pat.span, |
| "`X..` patterns in slices are experimental" |
| ); |
| } |
| } |
| } |
| PatKind::Box(..) => { |
| gate_feature_post!( |
| &self, |
| box_patterns, |
| pattern.span, |
| "box pattern syntax is experimental" |
| ); |
| } |
| PatKind::Range(_, Some(_), Spanned { node: RangeEnd::Excluded, .. }) => { |
| gate_feature_post!( |
| &self, |
| exclusive_range_pattern, |
| pattern.span, |
| "exclusive range pattern syntax is experimental" |
| ); |
| } |
| _ => {} |
| } |
| visit::walk_pat(self, pattern) |
| } |
| |
| fn visit_poly_trait_ref(&mut self, t: &'a ast::PolyTraitRef) { |
| self.check_late_bound_lifetime_defs(&t.bound_generic_params); |
| visit::walk_poly_trait_ref(self, t); |
| } |
| |
| fn visit_fn(&mut self, fn_kind: FnKind<'a>, span: Span, _: NodeId) { |
| if let Some(header) = fn_kind.header() { |
| // Stability of const fn methods are covered in `visit_assoc_item` below. |
| self.check_extern(header.ext, header.constness); |
| } |
| |
| if let FnKind::Closure(ast::ClosureBinder::For { generic_params, .. }, ..) = fn_kind { |
| self.check_late_bound_lifetime_defs(generic_params); |
| } |
| |
| if fn_kind.ctxt() != Some(FnCtxt::Foreign) && fn_kind.decl().c_variadic() { |
| gate_feature_post!(&self, c_variadic, span, "C-variadic functions are unstable"); |
| } |
| |
| visit::walk_fn(self, fn_kind) |
| } |
| |
| fn visit_assoc_constraint(&mut self, constraint: &'a AssocConstraint) { |
| if let AssocConstraintKind::Bound { .. } = constraint.kind { |
| if let Some(ast::GenericArgs::Parenthesized(args)) = constraint.gen_args.as_ref() |
| && args.inputs.is_empty() |
| && matches!(args.output, ast::FnRetTy::Default(..)) |
| { |
| gate_feature_post!( |
| &self, |
| return_type_notation, |
| constraint.span, |
| "return type notation is experimental" |
| ); |
| } else { |
| gate_feature_post!( |
| &self, |
| associated_type_bounds, |
| constraint.span, |
| "associated type bounds are unstable" |
| ); |
| } |
| } |
| visit::walk_assoc_constraint(self, constraint) |
| } |
| |
| fn visit_assoc_item(&mut self, i: &'a ast::AssocItem, ctxt: AssocCtxt) { |
| let is_fn = match &i.kind { |
| ast::AssocItemKind::Fn(_) => true, |
| ast::AssocItemKind::Type(box ast::TyAlias { ty, .. }) => { |
| if let (Some(_), AssocCtxt::Trait) = (ty, ctxt) { |
| gate_feature_post!( |
| &self, |
| associated_type_defaults, |
| i.span, |
| "associated type defaults are unstable" |
| ); |
| } |
| if let Some(ty) = ty { |
| self.check_impl_trait(ty, true); |
| } |
| false |
| } |
| _ => false, |
| }; |
| if let ast::Defaultness::Default(_) = i.kind.defaultness() { |
| // Limit `min_specialization` to only specializing functions. |
| gate_feature_fn!( |
| &self, |
| |x: &Features| x.specialization || (is_fn && x.min_specialization), |
| i.span, |
| sym::specialization, |
| "specialization is unstable" |
| ); |
| } |
| visit::walk_assoc_item(self, i, ctxt) |
| } |
| } |
| |
| pub fn check_crate(krate: &ast::Crate, sess: &Session) { |
| maybe_stage_features(sess, krate); |
| check_incompatible_features(sess); |
| let mut visitor = PostExpansionVisitor { sess, features: &sess.features_untracked() }; |
| |
| let spans = sess.parse_sess.gated_spans.spans.borrow(); |
| macro_rules! gate_all { |
| ($gate:ident, $msg:literal, $help:literal) => { |
| if let Some(spans) = spans.get(&sym::$gate) { |
| for span in spans { |
| gate_feature_post!(&visitor, $gate, *span, $msg, $help); |
| } |
| } |
| }; |
| ($gate:ident, $msg:literal) => { |
| if let Some(spans) = spans.get(&sym::$gate) { |
| for span in spans { |
| gate_feature_post!(&visitor, $gate, *span, $msg); |
| } |
| } |
| }; |
| } |
| gate_all!(c_str_literals, "`c\"..\"` literals are experimental"); |
| gate_all!( |
| if_let_guard, |
| "`if let` guards are experimental", |
| "you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`" |
| ); |
| gate_all!(let_chains, "`let` expressions in this position are unstable"); |
| gate_all!( |
| async_closure, |
| "async closures are unstable", |
| "to use an async block, remove the `||`: `async {`" |
| ); |
| gate_all!( |
| closure_lifetime_binder, |
| "`for<...>` binders for closures are experimental", |
| "consider removing `for<...>`" |
| ); |
| gate_all!(more_qualified_paths, "usage of qualified paths in this context is experimental"); |
| gate_all!(generators, "yield syntax is experimental"); |
| gate_all!(raw_ref_op, "raw address of syntax is experimental"); |
| gate_all!(const_trait_impl, "const trait impls are experimental"); |
| gate_all!( |
| half_open_range_patterns_in_slices, |
| "half-open range patterns in slices are unstable" |
| ); |
| gate_all!(inline_const, "inline-const is experimental"); |
| gate_all!(inline_const_pat, "inline-const in pattern position is experimental"); |
| gate_all!(associated_const_equality, "associated const equality is incomplete"); |
| gate_all!(yeet_expr, "`do yeet` expression is experimental"); |
| gate_all!(dyn_star, "`dyn*` trait objects are experimental"); |
| gate_all!(const_closures, "const closures are experimental"); |
| gate_all!(builtin_syntax, "`builtin #` syntax is unstable"); |
| |
| if !visitor.features.negative_bounds { |
| for &span in spans.get(&sym::negative_bounds).iter().copied().flatten() { |
| sess.emit_err(errors::NegativeBoundUnsupported { span }); |
| } |
| } |
| |
| // All uses of `gate_all!` below this point were added in #65742, |
| // and subsequently disabled (with the non-early gating readded). |
| // We emit an early future-incompatible warning for these. |
| // New syntax gates should go above here to get a hard error gate. |
| macro_rules! gate_all { |
| ($gate:ident, $msg:literal) => { |
| for span in spans.get(&sym::$gate).unwrap_or(&vec![]) { |
| gate_feature_post!(future_incompatible; &visitor, $gate, *span, $msg); |
| } |
| }; |
| } |
| |
| gate_all!(trait_alias, "trait aliases are experimental"); |
| gate_all!(associated_type_bounds, "associated type bounds are unstable"); |
| gate_all!(return_type_notation, "return type notation is experimental"); |
| gate_all!(decl_macro, "`macro` is experimental"); |
| gate_all!(box_patterns, "box pattern syntax is experimental"); |
| gate_all!(exclusive_range_pattern, "exclusive range pattern syntax is experimental"); |
| gate_all!(try_blocks, "`try` blocks are unstable"); |
| |
| visit::walk_crate(&mut visitor, krate); |
| } |
| |
| fn maybe_stage_features(sess: &Session, krate: &ast::Crate) { |
| // checks if `#![feature]` has been used to enable any lang feature |
| // does not check the same for lib features unless there's at least one |
| // declared lang feature |
| if !sess.opts.unstable_features.is_nightly_build() { |
| let lang_features = &sess.features_untracked().declared_lang_features; |
| if lang_features.len() == 0 { |
| return; |
| } |
| for attr in krate.attrs.iter().filter(|attr| attr.has_name(sym::feature)) { |
| let mut err = errors::FeatureOnNonNightly { |
| span: attr.span, |
| channel: option_env!("CFG_RELEASE_CHANNEL").unwrap_or("(unknown)"), |
| stable_features: vec![], |
| sugg: None, |
| }; |
| |
| let mut all_stable = true; |
| for ident in |
| attr.meta_item_list().into_iter().flatten().flat_map(|nested| nested.ident()) |
| { |
| let name = ident.name; |
| let stable_since = lang_features |
| .iter() |
| .flat_map(|&(feature, _, since)| if feature == name { since } else { None }) |
| .next(); |
| if let Some(since) = stable_since { |
| err.stable_features.push(errors::StableFeature { name, since }); |
| } else { |
| all_stable = false; |
| } |
| } |
| if all_stable { |
| err.sugg = Some(attr.span); |
| } |
| sess.parse_sess.span_diagnostic.emit_err(err); |
| } |
| } |
| } |
| |
| fn check_incompatible_features(sess: &Session) { |
| let features = sess.features_untracked(); |
| |
| let declared_features = features |
| .declared_lang_features |
| .iter() |
| .copied() |
| .map(|(name, span, _)| (name, span)) |
| .chain(features.declared_lib_features.iter().copied()); |
| |
| for (f1, f2) in rustc_feature::INCOMPATIBLE_FEATURES |
| .iter() |
| .filter(|&&(f1, f2)| features.enabled(f1) && features.enabled(f2)) |
| { |
| if let Some((f1_name, f1_span)) = declared_features.clone().find(|(name, _)| name == f1) { |
| if let Some((f2_name, f2_span)) = declared_features.clone().find(|(name, _)| name == f2) |
| { |
| let spans = vec![f1_span, f2_span]; |
| sess.emit_err(errors::IncompatibleFeatures { spans, f1: f1_name, f2: f2_name }); |
| } |
| } |
| } |
| } |
