Struct rustc_symbol_mangling::legacy::SymbolPrinter

struct SymbolPrinter<'tcx> {
    tcx: TyCtxt<'tcx>,
    path: SymbolPath,
    keep_within_component: bool,
}

Fields

tcx: TyCtxt<'tcx>

path: SymbolPath

keep_within_component: bool

Trait Implementations

impl<'tcx> PrettyPrinter<'tcx> for &mut SymbolPrinter<'tcx>

fn region_should_not_be_omitted(&self, _region: Region<'_>) -> bool

Returns true if the region should be printed in optional positions, e.g., &'a T or dyn Tr + 'b. This is typically the case for all non-'_ regions.

fn comma_sep<T>(
    self,
    elems: impl Iterator<Item = T>
) -> Result<Self, Self::Error> where
    T: Print<'tcx, Self, Output = Self, Error = Self::Error>, 

Prints comma-separated elements.

fn generic_delimiters(
    self,
    f: impl FnOnce(Self) -> Result<Self, Self::Error>
) -> Result<Self, Self::Error>

Prints <...> around what f prints.

fn print_value_path(
    self,
    def_id: DefId,
    substs: &'tcx [GenericArg<'tcx>]
) -> Result<Self::Path, Self::Error>

Like print_def_path but for value paths.

fn in_binder<T>(self, value: &Binder<'tcx, T>) -> Result<Self, Self::Error> where
    T: Print<'tcx, Self, Output = Self, Error = Self::Error> + TypeFoldable<'tcx>, 

fn wrap_binder<T, F>(
    self,
    value: &Binder<'tcx, T>,
    f: F
) -> Result<Self, Self::Error> where
    F: Fn(&T, Self) -> Result<Self, Error>,
    T: Print<'tcx, Self, Output = Self, Error = Self::Error> + TypeFoldable<'tcx>, 

fn typed_value(
    self,
    f: impl FnOnce(Self) -> Result<Self, Self::Error>,
    t: impl FnOnce(Self) -> Result<Self, Self::Error>,
    conversion: &str
) -> Result<Self::Const, Self::Error>

Prints {f: t} or {f as t} depending on the cast argument

fn try_print_visible_def_path(
    self,
    def_id: DefId
) -> Result<(Self, bool), Self::Error>

If possible, this returns a global path resolving to def_id that is visible from at least one local module, and returns true. If the crate defining def_id is declared with an extern crate, the path is guaranteed to use the extern crate.

fn try_print_trimmed_def_path(
    self,
    def_id: DefId
) -> Result<(Self::Path, bool), Self::Error>

Try to see if this path can be trimmed to a unique symbol name.

fn try_print_visible_def_path_recur(
    self,
    def_id: DefId,
    callers: &mut Vec<DefId, Global>
) -> Result<(Self, bool), Self::Error>

Does the work of try_print_visible_def_path, building the full definition path recursively before attempting to post-process it into the valid and visible version that accounts for re-exports.

fn pretty_path_qualified(
    self,
    self_ty: &'tcx TyS<'tcx>,
    trait_ref: Option<TraitRef<'tcx>>
) -> Result<Self::Path, Self::Error>

fn pretty_path_append_impl(
    self,
    print_prefix: impl FnOnce(Self) -> Result<Self::Path, Self::Error>,
    self_ty: &'tcx TyS<'tcx>,
    trait_ref: Option<TraitRef<'tcx>>
) -> Result<Self::Path, Self::Error>

fn pretty_print_type(
    self,
    ty: &'tcx TyS<'tcx>
) -> Result<Self::Type, Self::Error>

fn pretty_print_bound_var(
    &mut self,
    debruijn: DebruijnIndex,
    var: BoundVar
) -> Result<(), Self::Error>

fn infer_ty_name(&self, TyVid) -> Option<String>

fn pretty_print_dyn_existential(
    self,
    predicates: &'tcx List<Binder<'tcx, ExistentialPredicate<'tcx>>>
) -> Result<Self::DynExistential, Self::Error>

fn pretty_fn_sig(
    self,
    inputs: &[&'tcx TyS<'tcx>],
    c_variadic: bool,
    output: &'tcx TyS<'tcx>
) -> Result<Self, Self::Error>

fn pretty_print_const(
    self,
    ct: &'tcx Const<'tcx>,
    print_ty: bool
) -> Result<Self::Const, Self::Error>

fn pretty_print_const_scalar(
    self,
    scalar: Scalar<AllocId>,
    ty: &'tcx TyS<'tcx>,
    print_ty: bool
) -> Result<Self::Const, Self::Error>

fn pretty_print_const_scalar_ptr(
    self,
    ptr: Pointer<AllocId>,
    ty: &'tcx TyS<'tcx>,
    print_ty: bool
) -> Result<Self::Const, Self::Error>

fn pretty_print_const_scalar_int(
    self,
    int: ScalarInt,
    ty: &'tcx TyS<'tcx>,
    print_ty: bool
) -> Result<Self::Const, Self::Error>

fn pretty_print_const_pointer<Tag>(
    self,
    Pointer<Tag>,
    ty: &'tcx TyS<'tcx>,
    print_ty: bool
) -> Result<Self::Const, Self::Error> where
    Tag: Provenance, 

This is overridden for MIR printing because we only want to hide alloc ids from users, not from MIR where it is actually useful.

fn pretty_print_byte_str(
    self,
    byte_str: &'tcx [u8]
) -> Result<Self::Const, Self::Error>

fn pretty_print_const_value(
    self,
    ct: ConstValue<'tcx>,
    ty: &'tcx TyS<'tcx>,
    print_ty: bool
) -> Result<Self::Const, Self::Error>

impl<'tcx> Printer<'tcx> for &mut SymbolPrinter<'tcx>

type Error = Error

type Path = Self

type Region = Self

type Type = Self

type DynExistential = Self

type Const = Self

fn tcx(&self) -> TyCtxt<'tcx>

fn print_region(self, _region: Region<'_>) -> Result<Self::Region, Self::Error>

fn print_type(self, ty: Ty<'tcx>) -> Result<Self::Type, Self::Error>

fn print_dyn_existential(
    self,
    predicates: &'tcx List<Binder<'tcx, ExistentialPredicate<'tcx>>>
) -> Result<Self::DynExistential, Self::Error>

fn print_const(self, ct: &'tcx Const<'tcx>) -> Result<Self::Const, Self::Error>

fn path_crate(self, cnum: CrateNum) -> Result<Self::Path, Self::Error>

fn path_qualified(
    self,
    self_ty: Ty<'tcx>,
    trait_ref: Option<TraitRef<'tcx>>
) -> Result<Self::Path, Self::Error>

fn path_append_impl(
    self,
    print_prefix: impl FnOnce(Self) -> Result<Self::Path, Self::Error>,
    _disambiguated_data: &DisambiguatedDefPathData,
    self_ty: Ty<'tcx>,
    trait_ref: Option<TraitRef<'tcx>>
) -> Result<Self::Path, Self::Error>

fn path_append(
    self,
    print_prefix: impl FnOnce(Self) -> Result<Self::Path, Self::Error>,
    disambiguated_data: &DisambiguatedDefPathData
) -> Result<Self::Path, Self::Error>

fn path_generic_args(
    self,
    print_prefix: impl FnOnce(Self) -> Result<Self::Path, Self::Error>,
    args: &[GenericArg<'tcx>]
) -> Result<Self::Path, Self::Error>

fn print_def_path(
    self,
    def_id: DefId,
    substs: &'tcx [GenericArg<'tcx>]
) -> Result<Self::Path, Self::Error>

fn print_impl_path(
    self,
    impl_def_id: DefId,
    substs: &'tcx [GenericArg<'tcx>],
    self_ty: &'tcx TyS<'tcx>,
    trait_ref: Option<TraitRef<'tcx>>
) -> Result<Self::Path, Self::Error>

fn default_print_def_path(
    self,
    def_id: DefId,
    substs: &'tcx [GenericArg<'tcx>]
) -> Result<Self::Path, Self::Error>

fn generic_args_to_print(
    &self,
    generics: &'tcx Generics,
    substs: &'tcx [GenericArg<'tcx>]
) -> &'tcx [GenericArg<'tcx>]

fn default_print_impl_path(
    self,
    impl_def_id: DefId,
    _substs: &'tcx [GenericArg<'tcx>],
    self_ty: &'tcx TyS<'tcx>,
    impl_trait_ref: Option<TraitRef<'tcx>>
) -> Result<Self::Path, Self::Error>

impl Write for SymbolPrinter<'_>

fn write_str(&mut self, s: &str) -> Result

Writes a string slice into this writer, returning whether the write succeeded.

fn write_char(&mut self, c: char) -> Result<(), Error>

Writes a char into this writer, returning whether the write succeeded.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Glue for usage of the write! macro with implementors of this trait.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 64 bytes