rustc_hir/
arena.rs

1//! Declares an arena that can allocate values of any `Copy` type, and of
2//! any `!Copy` type listed below.
3
4pub struct Arena<'tcx> {
    pub dropless: ::rustc_arena::DroplessArena,
    asm_template: ::rustc_arena::TypedArena<rustc_ast::InlineAsmTemplatePiece>,
    attribute: ::rustc_arena::TypedArena<rustc_attr_ir::Attribute>,
    owner_info: ::rustc_arena::TypedArena<crate::OwnerInfo<'tcx>>,
    macro_def: ::rustc_arena::TypedArena<rustc_ast::MacroDef>,
    delegation_info: ::rustc_arena::TypedArena<crate::DelegationInfo>,
}
#[automatically_derived]
impl<'tcx> ::core::default::Default for Arena<'tcx> {
    #[inline]
    fn default() -> Arena<'tcx> {
        Arena {
            dropless: ::core::default::Default::default(),
            asm_template: ::core::default::Default::default(),
            attribute: ::core::default::Default::default(),
            owner_info: ::core::default::Default::default(),
            macro_def: ::core::default::Default::default(),
            delegation_info: ::core::default::Default::default(),
        }
    }
}
pub trait ArenaAllocatable<'tcx, C = rustc_arena::IsNotCopy>: Sized {
    #[allow(clippy :: mut_from_ref)]
    fn allocate_on(self, arena: &'tcx Arena<'tcx>)
    -> &'tcx mut Self;
    #[allow(clippy :: mut_from_ref)]
    fn allocate_from_iter(arena: &'tcx Arena<'tcx>,
    iter: impl ::std::iter::IntoIterator<Item = Self>)
    -> &'tcx mut [Self];
}
impl<'tcx, T: Copy> ArenaAllocatable<'tcx, rustc_arena::IsCopy> for T {
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
        arena.dropless.alloc(self)
    }
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    fn allocate_from_iter(arena: &'tcx Arena<'tcx>,
        iter: impl ::std::iter::IntoIterator<Item = Self>)
        -> &'tcx mut [Self] {
        arena.dropless.alloc_from_iter(iter)
    }
}
impl<'tcx> ArenaAllocatable<'tcx, rustc_arena::IsNotCopy> for
    rustc_ast::InlineAsmTemplatePiece {
    #[inline]
    fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc(self)
        } else { arena.asm_template.alloc(self) }
    }
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    fn allocate_from_iter(arena: &'tcx Arena<'tcx>,
        iter: impl ::std::iter::IntoIterator<Item = Self>)
        -> &'tcx mut [Self] {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc_from_iter(iter)
        } else { arena.asm_template.alloc_from_iter(iter) }
    }
}
impl<'tcx> ArenaAllocatable<'tcx, rustc_arena::IsNotCopy> for
    rustc_attr_ir::Attribute {
    #[inline]
    fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc(self)
        } else { arena.attribute.alloc(self) }
    }
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    fn allocate_from_iter(arena: &'tcx Arena<'tcx>,
        iter: impl ::std::iter::IntoIterator<Item = Self>)
        -> &'tcx mut [Self] {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc_from_iter(iter)
        } else { arena.attribute.alloc_from_iter(iter) }
    }
}
impl<'tcx> ArenaAllocatable<'tcx, rustc_arena::IsNotCopy> for
    crate::OwnerInfo<'tcx> {
    #[inline]
    fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc(self)
        } else { arena.owner_info.alloc(self) }
    }
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    fn allocate_from_iter(arena: &'tcx Arena<'tcx>,
        iter: impl ::std::iter::IntoIterator<Item = Self>)
        -> &'tcx mut [Self] {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc_from_iter(iter)
        } else { arena.owner_info.alloc_from_iter(iter) }
    }
}
impl<'tcx> ArenaAllocatable<'tcx, rustc_arena::IsNotCopy> for
    rustc_ast::MacroDef {
    #[inline]
    fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc(self)
        } else { arena.macro_def.alloc(self) }
    }
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    fn allocate_from_iter(arena: &'tcx Arena<'tcx>,
        iter: impl ::std::iter::IntoIterator<Item = Self>)
        -> &'tcx mut [Self] {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc_from_iter(iter)
        } else { arena.macro_def.alloc_from_iter(iter) }
    }
}
impl<'tcx> ArenaAllocatable<'tcx, rustc_arena::IsNotCopy> for
    crate::DelegationInfo {
    #[inline]
    fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc(self)
        } else { arena.delegation_info.alloc(self) }
    }
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    fn allocate_from_iter(arena: &'tcx Arena<'tcx>,
        iter: impl ::std::iter::IntoIterator<Item = Self>)
        -> &'tcx mut [Self] {
        if !::std::mem::needs_drop::<Self>() {
            arena.dropless.alloc_from_iter(iter)
        } else { arena.delegation_info.alloc_from_iter(iter) }
    }
}
impl<'tcx> Arena<'tcx> {
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    pub fn alloc<T: ArenaAllocatable<'tcx, C>, C>(&'tcx self, value: T)
        -> &mut T {
        value.allocate_on(self)
    }
    #[inline]
    #[allow(clippy :: mut_from_ref)]
    pub fn alloc_slice<T: ::std::marker::Copy>(&self, value: &[T])
        -> &mut [T] {
        if value.is_empty() { return &mut []; }
        self.dropless.alloc_slice(value)
    }
    #[inline]
    pub fn alloc_str(&self, string: &str) -> &str {
        if string.is_empty() { return ""; }
        self.dropless.alloc_str(string)
    }
    #[allow(clippy :: mut_from_ref)]
    pub fn alloc_from_iter<T: ArenaAllocatable<'tcx, C>,
        C>(&'tcx self, iter: impl ::std::iter::IntoIterator<Item = T>)
        -> &mut [T] {
        T::allocate_from_iter(self, iter)
    }
}rustc_arena::declare_arena! {
5    // HIR types
6    asm_template: rustc_ast::InlineAsmTemplatePiece,
7    attribute: rustc_attr_ir::Attribute,
8    owner_info: crate::OwnerInfo<'tcx>,
9    macro_def: rustc_ast::MacroDef,
10    delegation_info: crate::DelegationInfo,
11}
rustc_hir/arena.rs

rustc_hir/
arena.rs
