[−][src]Module rustc_middle::ty::print

Modules

pretty

Structs

FmtPrinter
FmtPrinterData
RegionHighlightMode

The "region highlights" are used to control region printing during specific error messages. When a "region highlight" is enabled, it gives an alternate way to print specific regions. For now, we always print those regions using a number, so something like "'0".

TraitRefPrintOnlyTraitPath

Wrapper type for ty::TraitRef which opts-in to pretty printing only the trait path. That is, it will print Trait<U> instead of <T as Trait<U>>.

Traits

PrettyPrinter

Trait for printers that pretty-print using fmt::Write to the printer.

Print
Printer

Interface for outputting user-facing "type-system entities" (paths, types, lifetimes, constants, etc.) as a side-effect (e.g. formatting, like PrettyPrinter implementors do) or by constructing some alternative representation (e.g. an AST), which the associated types allow passing through the methods.

Functions

characteristic_def_id_of_type
characteristic_def_id_of_type_cached

As a heuristic, when we see an impl, if we see that the 'self type' is a type defined in the same module as the impl, we can omit including the path to the impl itself. This function tries to find a "characteristic DefId" for a type. It's just a heuristic so it makes some questionable decisions and we may want to adjust it later.

provide
with_crate_prefix

Adds the crate:: prefix to paths where appropriate.

with_forced_impl_filename_line

Force us to name impls with just the filename/line number. We normally try to use types. But at some points, notably while printing cycle errors, this can result in extra or suboptimal error output, so this variable disables that check.

with_no_queries

Avoids running any queries during any prints that occur during the closure. This may alter the appearance of some types (e.g. forcing verbose printing for opaque types). This method is used during some queries (e.g. explicit_item_bounds for opaque types), to ensure that any debug printing that occurs during the query computation does not end up recursively calling the same query.

with_no_trimmed_paths

Prevent path trimming if it is turned on. Path trimming affects Display impl of various rustc types, for example std::vec::Vec would be trimmed to Vec, if no other Vec is found.