| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // ignore-tidy-linelength |
| |
| macro_rules! enum_from_u32 { |
| ($(#[$attr:meta])* pub enum $name:ident { |
| $($variant:ident = $e:expr,)* |
| }) => { |
| $(#[$attr])* |
| pub enum $name { |
| $($variant = $e),* |
| } |
| |
| impl $name { |
| pub fn from_u32(u: u32) -> Option<$name> { |
| $(if u == $name::$variant as u32 { |
| return Some($name::$variant) |
| })* |
| None |
| } |
| } |
| }; |
| ($(#[$attr:meta])* pub enum $name:ident { |
| $($variant:ident,)* |
| }) => { |
| $(#[$attr])* |
| pub enum $name { |
| $($variant,)* |
| } |
| |
| impl $name { |
| pub fn from_u32(u: u32) -> Option<$name> { |
| $(if u == $name::$variant as u32 { |
| return Some($name::$variant) |
| })* |
| None |
| } |
| } |
| } |
| } |
| |
| #[macro_export] |
| macro_rules! bug { |
| () => ( bug!("impossible case reached") ); |
| ($($message:tt)*) => ({ |
| $crate::util::bug::bug_fmt(file!(), line!(), format_args!($($message)*)) |
| }) |
| } |
| |
| #[macro_export] |
| macro_rules! span_bug { |
| ($span:expr, $($message:tt)*) => ({ |
| $crate::util::bug::span_bug_fmt(file!(), line!(), $span, format_args!($($message)*)) |
| }) |
| } |
| |
| #[macro_export] |
| macro_rules! static_assert { |
| ($name:ident: $test:expr) => { |
| // Use the bool to access an array such that if the bool is false, the access |
| // is out-of-bounds. |
| #[allow(dead_code)] |
| static $name: () = [()][!$test as usize]; |
| } |
| } |
| |
| #[macro_export] |
| macro_rules! __impl_stable_hash_field { |
| ($field:ident, $ctx:expr, $hasher:expr) => ($field.hash_stable($ctx, $hasher)); |
| ($field:ident, $ctx:expr, $hasher:expr, _) => ({ let _ = $field; }); |
| ($field:ident, $ctx:expr, $hasher:expr, $delegate:expr) => ($delegate.hash_stable($ctx, $hasher)); |
| } |
| |
| #[macro_export] |
| macro_rules! impl_stable_hash_for { |
| // FIXME(mark-i-m): Some of these should be `?` rather than `*`. See the git blame and change |
| // them back when `?` is supported again. |
| (enum $enum_name:path { $( $variant:ident $( ( $($field:ident $(-> $delegate:tt)*),* ) )* ),* $(,)* }) => { |
| impl<'a, 'tcx> ::rustc_data_structures::stable_hasher::HashStable<$crate::ich::StableHashingContext<'a>> for $enum_name { |
| #[inline] |
| fn hash_stable<W: ::rustc_data_structures::stable_hasher::StableHasherResult>(&self, |
| __ctx: &mut $crate::ich::StableHashingContext<'a>, |
| __hasher: &mut ::rustc_data_structures::stable_hasher::StableHasher<W>) { |
| use $enum_name::*; |
| ::std::mem::discriminant(self).hash_stable(__ctx, __hasher); |
| |
| match *self { |
| $( |
| $variant $( ( $(ref $field),* ) )* => { |
| $($( __impl_stable_hash_field!($field, __ctx, __hasher $(, $delegate)*) );*)* |
| } |
| )* |
| } |
| } |
| } |
| }; |
| // FIXME(mark-i-m): same here. |
| (struct $struct_name:path { $($field:ident $(-> $delegate:tt)*),* $(,)* }) => { |
| impl<'a, 'tcx> ::rustc_data_structures::stable_hasher::HashStable<$crate::ich::StableHashingContext<'a>> for $struct_name { |
| #[inline] |
| fn hash_stable<W: ::rustc_data_structures::stable_hasher::StableHasherResult>(&self, |
| __ctx: &mut $crate::ich::StableHashingContext<'a>, |
| __hasher: &mut ::rustc_data_structures::stable_hasher::StableHasher<W>) { |
| let $struct_name { |
| $(ref $field),* |
| } = *self; |
| |
| $( __impl_stable_hash_field!($field, __ctx, __hasher $(, $delegate)*) );* |
| } |
| } |
| }; |
| // FIXME(mark-i-m): same here. |
| (tuple_struct $struct_name:path { $($field:ident $(-> $delegate:tt)*),* $(,)* }) => { |
| impl<'a, 'tcx> ::rustc_data_structures::stable_hasher::HashStable<$crate::ich::StableHashingContext<'a>> for $struct_name { |
| #[inline] |
| fn hash_stable<W: ::rustc_data_structures::stable_hasher::StableHasherResult>(&self, |
| __ctx: &mut $crate::ich::StableHashingContext<'a>, |
| __hasher: &mut ::rustc_data_structures::stable_hasher::StableHasher<W>) { |
| let $struct_name ( |
| $(ref $field),* |
| ) = *self; |
| |
| $( __impl_stable_hash_field!($field, __ctx, __hasher $(, $delegate)*) );* |
| } |
| } |
| }; |
| |
| (impl<$tcx:lifetime $(, $T:ident)*> for struct $struct_name:path { |
| $($field:ident),* $(,)* |
| }) => { |
| impl<'a, $tcx, $($T,)*> ::rustc_data_structures::stable_hasher::HashStable<$crate::ich::StableHashingContext<'a>> for $struct_name |
| where $($T: ::rustc_data_structures::stable_hasher::HashStable<$crate::ich::StableHashingContext<'a>>),* |
| { |
| #[inline] |
| fn hash_stable<W: ::rustc_data_structures::stable_hasher::StableHasherResult>(&self, |
| __ctx: &mut $crate::ich::StableHashingContext<'a>, |
| __hasher: &mut ::rustc_data_structures::stable_hasher::StableHasher<W>) { |
| let $struct_name { |
| $(ref $field),* |
| } = *self; |
| |
| $( $field.hash_stable(__ctx, __hasher));* |
| } |
| } |
| }; |
| } |
| |
| #[macro_export] |
| macro_rules! impl_stable_hash_for_spanned { |
| ($T:path) => ( |
| |
| impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for ::syntax::source_map::Spanned<$T> |
| { |
| #[inline] |
| fn hash_stable<W: StableHasherResult>(&self, |
| hcx: &mut StableHashingContext<'a>, |
| hasher: &mut StableHasher<W>) { |
| self.node.hash_stable(hcx, hasher); |
| self.span.hash_stable(hcx, hasher); |
| } |
| } |
| ); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Lift and TypeFoldable macros |
| // |
| // When possible, use one of these (relatively) convenient macros to write |
| // the impls for you. |
| |
| #[macro_export] |
| macro_rules! CloneLiftImpls { |
| (for <$tcx:lifetime> { $($ty:ty,)+ }) => { |
| $( |
| impl<$tcx> $crate::ty::Lift<$tcx> for $ty { |
| type Lifted = Self; |
| fn lift_to_tcx<'a, 'gcx>(&self, _: $crate::ty::TyCtxt<'a, 'gcx, $tcx>) -> Option<Self> { |
| Some(Clone::clone(self)) |
| } |
| } |
| )+ |
| }; |
| |
| ($($ty:ty,)+) => { |
| CloneLiftImpls! { |
| for <'tcx> { |
| $($ty,)+ |
| } |
| } |
| }; |
| } |
| |
| /// Used for types that are `Copy` and which **do not care arena |
| /// allocated data** (i.e., don't need to be folded). |
| #[macro_export] |
| macro_rules! CloneTypeFoldableImpls { |
| (for <$tcx:lifetime> { $($ty:ty,)+ }) => { |
| $( |
| impl<$tcx> $crate::ty::fold::TypeFoldable<$tcx> for $ty { |
| fn super_fold_with<'gcx: $tcx, F: $crate::ty::fold::TypeFolder<'gcx, $tcx>>( |
| &self, |
| _: &mut F |
| ) -> $ty { |
| Clone::clone(self) |
| } |
| |
| fn super_visit_with<F: $crate::ty::fold::TypeVisitor<$tcx>>( |
| &self, |
| _: &mut F) |
| -> bool |
| { |
| false |
| } |
| } |
| )+ |
| }; |
| |
| ($($ty:ty,)+) => { |
| CloneTypeFoldableImpls! { |
| for <'tcx> { |
| $($ty,)+ |
| } |
| } |
| }; |
| } |
| |
| #[macro_export] |
| macro_rules! CloneTypeFoldableAndLiftImpls { |
| ($($t:tt)*) => { |
| CloneTypeFoldableImpls! { $($t)* } |
| CloneLiftImpls! { $($t)* } |
| } |
| } |
| |
| #[macro_export] |
| macro_rules! BraceStructLiftImpl { |
| (impl<$($p:tt),*> Lift<$tcx:tt> for $s:path { |
| type Lifted = $lifted:ty; |
| $($field:ident),* $(,)* |
| } $(where $($wc:tt)*)*) => { |
| impl<$($p),*> $crate::ty::Lift<$tcx> for $s |
| $(where $($wc)*)* |
| { |
| type Lifted = $lifted; |
| |
| fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<$lifted> { |
| $(let $field = tcx.lift(&self.$field)?;)* |
| Some(Self::Lifted { $($field),* }) |
| } |
| } |
| }; |
| } |
| |
| #[macro_export] |
| macro_rules! EnumLiftImpl { |
| (impl<$($p:tt),*> Lift<$tcx:tt> for $s:path { |
| type Lifted = $lifted:ty; |
| $($variants:tt)* |
| } $(where $($wc:tt)*)*) => { |
| impl<$($p),*> $crate::ty::Lift<$tcx> for $s |
| $(where $($wc)*)* |
| { |
| type Lifted = $lifted; |
| |
| fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<$lifted> { |
| EnumLiftImpl!(@Variants(self, tcx) input($($variants)*) output()) |
| } |
| } |
| }; |
| |
| (@Variants($this:expr, $tcx:expr) input() output($($output:tt)*)) => { |
| match $this { |
| $($output)* |
| } |
| }; |
| |
| (@Variants($this:expr, $tcx:expr) |
| input( ($variant:path) ( $($variant_arg:ident),* ) , $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumLiftImpl!( |
| @Variants($this, $tcx) |
| input($($input)*) |
| output( |
| $variant ( $($variant_arg),* ) => { |
| Some($variant ( $($tcx.lift($variant_arg)?),* )) |
| } |
| $($output)* |
| ) |
| ) |
| }; |
| |
| (@Variants($this:expr, $tcx:expr) |
| input( ($variant:path), $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumLiftImpl!( |
| @Variants($this, $tcx) |
| input($($input)*) |
| output( |
| $variant => { Some($variant) } |
| $($output)* |
| ) |
| ) |
| }; |
| } |
| |
| #[macro_export] |
| macro_rules! BraceStructTypeFoldableImpl { |
| (impl<$($p:tt),*> TypeFoldable<$tcx:tt> for $s:path { |
| $($field:ident),* $(,)* |
| } $(where $($wc:tt)*)*) => { |
| impl<$($p),*> $crate::ty::fold::TypeFoldable<$tcx> for $s |
| $(where $($wc)*)* |
| { |
| fn super_fold_with<'gcx: $tcx, V: $crate::ty::fold::TypeFolder<'gcx, $tcx>>( |
| &self, |
| folder: &mut V, |
| ) -> Self { |
| let $s { $($field,)* } = self; |
| $s { $($field: $crate::ty::fold::TypeFoldable::fold_with($field, folder),)* } |
| } |
| |
| fn super_visit_with<V: $crate::ty::fold::TypeVisitor<$tcx>>( |
| &self, |
| visitor: &mut V, |
| ) -> bool { |
| let $s { $($field,)* } = self; |
| false $(|| $crate::ty::fold::TypeFoldable::visit_with($field, visitor))* |
| } |
| } |
| }; |
| } |
| |
| #[macro_export] |
| macro_rules! TupleStructTypeFoldableImpl { |
| (impl<$($p:tt),*> TypeFoldable<$tcx:tt> for $s:path { |
| $($field:ident),* $(,)* |
| } $(where $($wc:tt)*)*) => { |
| impl<$($p),*> $crate::ty::fold::TypeFoldable<$tcx> for $s |
| $(where $($wc)*)* |
| { |
| fn super_fold_with<'gcx: $tcx, V: $crate::ty::fold::TypeFolder<'gcx, $tcx>>( |
| &self, |
| folder: &mut V, |
| ) -> Self { |
| let $s($($field,)*)= self; |
| $s($($crate::ty::fold::TypeFoldable::fold_with($field, folder),)*) |
| } |
| |
| fn super_visit_with<V: $crate::ty::fold::TypeVisitor<$tcx>>( |
| &self, |
| visitor: &mut V, |
| ) -> bool { |
| let $s($($field,)*) = self; |
| false $(|| $crate::ty::fold::TypeFoldable::visit_with($field, visitor))* |
| } |
| } |
| }; |
| } |
| |
| #[macro_export] |
| macro_rules! EnumTypeFoldableImpl { |
| (impl<$($p:tt),*> TypeFoldable<$tcx:tt> for $s:path { |
| $($variants:tt)* |
| } $(where $($wc:tt)*)*) => { |
| impl<$($p),*> $crate::ty::fold::TypeFoldable<$tcx> for $s |
| $(where $($wc)*)* |
| { |
| fn super_fold_with<'gcx: $tcx, V: $crate::ty::fold::TypeFolder<'gcx, $tcx>>( |
| &self, |
| folder: &mut V, |
| ) -> Self { |
| EnumTypeFoldableImpl!(@FoldVariants(self, folder) input($($variants)*) output()) |
| } |
| |
| fn super_visit_with<V: $crate::ty::fold::TypeVisitor<$tcx>>( |
| &self, |
| visitor: &mut V, |
| ) -> bool { |
| EnumTypeFoldableImpl!(@VisitVariants(self, visitor) input($($variants)*) output()) |
| } |
| } |
| }; |
| |
| (@FoldVariants($this:expr, $folder:expr) input() output($($output:tt)*)) => { |
| match $this { |
| $($output)* |
| } |
| }; |
| |
| (@FoldVariants($this:expr, $folder:expr) |
| input( ($variant:path) ( $($variant_arg:ident),* ) , $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumTypeFoldableImpl!( |
| @FoldVariants($this, $folder) |
| input($($input)*) |
| output( |
| $variant ( $($variant_arg),* ) => { |
| $variant ( |
| $($crate::ty::fold::TypeFoldable::fold_with($variant_arg, $folder)),* |
| ) |
| } |
| $($output)* |
| ) |
| ) |
| }; |
| |
| (@FoldVariants($this:expr, $folder:expr) |
| input( ($variant:path) { $($variant_arg:ident),* $(,)* } , $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumTypeFoldableImpl!( |
| @FoldVariants($this, $folder) |
| input($($input)*) |
| output( |
| $variant { $($variant_arg),* } => { |
| $variant { |
| $($variant_arg: $crate::ty::fold::TypeFoldable::fold_with( |
| $variant_arg, $folder |
| )),* } |
| } |
| $($output)* |
| ) |
| ) |
| }; |
| |
| (@FoldVariants($this:expr, $folder:expr) |
| input( ($variant:path), $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumTypeFoldableImpl!( |
| @FoldVariants($this, $folder) |
| input($($input)*) |
| output( |
| $variant => { $variant } |
| $($output)* |
| ) |
| ) |
| }; |
| |
| (@VisitVariants($this:expr, $visitor:expr) input() output($($output:tt)*)) => { |
| match $this { |
| $($output)* |
| } |
| }; |
| |
| (@VisitVariants($this:expr, $visitor:expr) |
| input( ($variant:path) ( $($variant_arg:ident),* ) , $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumTypeFoldableImpl!( |
| @VisitVariants($this, $visitor) |
| input($($input)*) |
| output( |
| $variant ( $($variant_arg),* ) => { |
| false $(|| $crate::ty::fold::TypeFoldable::visit_with( |
| $variant_arg, $visitor |
| ))* |
| } |
| $($output)* |
| ) |
| ) |
| }; |
| |
| (@VisitVariants($this:expr, $visitor:expr) |
| input( ($variant:path) { $($variant_arg:ident),* $(,)* } , $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumTypeFoldableImpl!( |
| @VisitVariants($this, $visitor) |
| input($($input)*) |
| output( |
| $variant { $($variant_arg),* } => { |
| false $(|| $crate::ty::fold::TypeFoldable::visit_with( |
| $variant_arg, $visitor |
| ))* |
| } |
| $($output)* |
| ) |
| ) |
| }; |
| |
| (@VisitVariants($this:expr, $visitor:expr) |
| input( ($variant:path), $($input:tt)*) |
| output( $($output:tt)*) ) => { |
| EnumTypeFoldableImpl!( |
| @VisitVariants($this, $visitor) |
| input($($input)*) |
| output( |
| $variant => { false } |
| $($output)* |
| ) |
| ) |
| }; |
| } |
| |