diff options
Diffstat (limited to '')
| -rw-r--r-- | compiler/rustc_ast_passes/src/feature_gate.rs | 291 |
1 files changed, 25 insertions, 266 deletions
diff --git a/compiler/rustc_ast_passes/src/feature_gate.rs b/compiler/rustc_ast_passes/src/feature_gate.rs index aeff73c5b..546010135 100644 --- a/compiler/rustc_ast_passes/src/feature_gate.rs +++ b/compiler/rustc_ast_passes/src/feature_gate.rs @@ -1,15 +1,15 @@ use rustc_ast as ast; use rustc_ast::visit::{self, AssocCtxt, FnCtxt, FnKind, Visitor}; use rustc_ast::{AssocConstraint, AssocConstraintKind, NodeId}; -use rustc_ast::{PatKind, RangeEnd, VariantData}; +use rustc_ast::{PatKind, RangeEnd}; use rustc_errors::{struct_span_err, Applicability, StashKey}; -use rustc_feature::Features; -use rustc_feature::{AttributeGate, BuiltinAttribute, BUILTIN_ATTRIBUTE_MAP}; -use rustc_session::parse::{feature_err, feature_warn}; +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; macro_rules! gate_feature_fn { ($visitor: expr, $has_feature: expr, $span: expr, $name: expr, $explain: expr, $help: expr) => {{ @@ -84,210 +84,26 @@ impl<'a> PostExpansionVisitor<'a> { } } - match symbol_unescaped.as_str() { - // Stable - "Rust" | "C" | "cdecl" | "stdcall" | "fastcall" | "aapcs" | "win64" | "sysv64" - | "system" => {} - "rust-intrinsic" => { - gate_feature_post!(&self, intrinsics, span, "intrinsics are subject to change"); - } - "platform-intrinsic" => { - gate_feature_post!( - &self, - platform_intrinsics, - span, - "platform intrinsics are experimental and possibly buggy" - ); - } - "vectorcall" => { - gate_feature_post!( - &self, - abi_vectorcall, - span, - "vectorcall is experimental and subject to change" - ); - } - "thiscall" => { - gate_feature_post!( - &self, - abi_thiscall, - span, - "thiscall is experimental and subject to change" - ); - } - "rust-call" => { - gate_feature_post!( - &self, - unboxed_closures, - span, - "rust-call ABI is subject to change" - ); - } - "rust-cold" => { - gate_feature_post!( - &self, - rust_cold_cc, - span, - "rust-cold is experimental and subject to change" - ); - } - "ptx-kernel" => { - gate_feature_post!( - &self, - abi_ptx, - span, - "PTX ABIs are experimental and subject to change" - ); - } - "unadjusted" => { - gate_feature_post!( - &self, - abi_unadjusted, - span, - "unadjusted ABI is an implementation detail and perma-unstable" - ); - } - "msp430-interrupt" => { - gate_feature_post!( - &self, - abi_msp430_interrupt, - span, - "msp430-interrupt ABI is experimental and subject to change" - ); - } - "x86-interrupt" => { - gate_feature_post!( - &self, - abi_x86_interrupt, - span, - "x86-interrupt ABI is experimental and subject to change" - ); - } - "amdgpu-kernel" => { - gate_feature_post!( - &self, - abi_amdgpu_kernel, - span, - "amdgpu-kernel ABI is experimental and subject to change" - ); - } - "avr-interrupt" | "avr-non-blocking-interrupt" => { - gate_feature_post!( - &self, - abi_avr_interrupt, - span, - "avr-interrupt and avr-non-blocking-interrupt ABIs are experimental and subject to change" - ); - } - "efiapi" => { - gate_feature_post!( - &self, - abi_efiapi, - span, - "efiapi ABI is experimental and subject to change" - ); - } - "C-cmse-nonsecure-call" => { - gate_feature_post!( - &self, - abi_c_cmse_nonsecure_call, + 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, - "C-cmse-nonsecure-call ABI is experimental and subject to change" - ); - } - "C-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "C-unwind ABI is experimental and subject to change" - ); - } - "stdcall-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "stdcall-unwind ABI is experimental and subject to change" - ); - } - "system-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "system-unwind ABI is experimental and subject to change" - ); - } - "thiscall-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "thiscall-unwind ABI is experimental and subject to change" - ); - } - "cdecl-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "cdecl-unwind ABI is experimental and subject to change" - ); - } - "fastcall-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "fastcall-unwind ABI is experimental and subject to change" - ); - } - "vectorcall-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "vectorcall-unwind ABI is experimental and subject to change" - ); - } - "aapcs-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "aapcs-unwind ABI is experimental and subject to change" - ); - } - "win64-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "win64-unwind ABI is experimental and subject to change" - ); - } - "sysv64-unwind" => { - gate_feature_post!( - &self, - c_unwind, - span, - "sysv64-unwind ABI is experimental and subject to change" - ); - } - "wasm" => { - gate_feature_post!( - &self, - wasm_abi, - span, - "wasm ABI is experimental and subject to change" - ); + GateIssue::Language, + explain, + ) + .emit(); } - abi => { + 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: {}", abi), + &format!( + "unrecognized ABI not caught in lowering: {}", + symbol_unescaped.as_str() + ), ); } } @@ -300,46 +116,6 @@ impl<'a> PostExpansionVisitor<'a> { } } - fn maybe_report_invalid_custom_discriminants(&self, variants: &[ast::Variant]) { - let has_fields = variants.iter().any(|variant| match variant.data { - VariantData::Tuple(..) | VariantData::Struct(..) => true, - VariantData::Unit(..) => false, - }); - - let discriminant_spans = variants - .iter() - .filter(|variant| match variant.data { - VariantData::Tuple(..) | VariantData::Struct(..) => false, - VariantData::Unit(..) => true, - }) - .filter_map(|variant| variant.disr_expr.as_ref().map(|c| c.value.span)) - .collect::<Vec<_>>(); - - if !discriminant_spans.is_empty() && has_fields { - let mut err = feature_err( - &self.sess.parse_sess, - sym::arbitrary_enum_discriminant, - discriminant_spans.clone(), - "custom discriminant values are not allowed in enums with tuple or struct variants", - ); - for sp in discriminant_spans { - err.span_label(sp, "disallowed custom discriminant"); - } - for variant in variants.iter() { - match &variant.data { - VariantData::Struct(..) => { - err.span_label(variant.span, "struct variant defined here"); - } - VariantData::Tuple(..) => { - err.span_label(variant.span, "tuple variant defined here"); - } - VariantData::Unit(..) => {} - } - } - err.emit(); - } - } - /// Feature gate `impl Trait` inside `type Alias = $type_expr;`. fn check_impl_trait(&self, ty: &ast::Ty) { struct ImplTraitVisitor<'a> { @@ -457,26 +233,6 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> { } } - ast::ItemKind::Enum(ast::EnumDef { ref variants, .. }, ..) => { - for variant in variants { - match (&variant.data, &variant.disr_expr) { - (ast::VariantData::Unit(..), _) => {} - (_, Some(disr_expr)) => gate_feature_post!( - &self, - arbitrary_enum_discriminant, - disr_expr.value.span, - "discriminants on non-unit variants are experimental" - ), - _ => {} - } - } - - let has_feature = self.features.arbitrary_enum_discriminant; - if !has_feature && !i.span.allows_unstable(sym::arbitrary_enum_discriminant) { - self.maybe_report_invalid_custom_discriminants(&variants); - } - } - ast::ItemKind::Impl(box ast::Impl { polarity, defaultness, ref of_trait, .. }) => { if let ast::ImplPolarity::Negative(span) = polarity { gate_feature_post!( @@ -645,7 +401,7 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> { if let PatKind::Range(Some(_), None, Spanned { .. }) = inner_pat.kind { gate_feature_post!( &self, - half_open_range_patterns, + half_open_range_patterns_in_slices, pat.span, "`X..` patterns in slices are experimental" ); @@ -701,7 +457,7 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> { fn visit_assoc_item(&mut self, i: &'a ast::AssocItem, ctxt: AssocCtxt) { let is_fn = match i.kind { ast::AssocItemKind::Fn(_) => true, - ast::AssocItemKind::TyAlias(box ast::TyAlias { ref ty, .. }) => { + ast::AssocItemKind::Type(box ast::TyAlias { ref ty, .. }) => { if let (Some(_), AssocCtxt::Trait) = (ty, ctxt) { gate_feature_post!( &self, @@ -773,7 +529,10 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session) { 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, "half-open range patterns are unstable"); + 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"); |