Module core::fmt

Utilities for formatting and printing strings.

Modules

builders 🔒

float 🔒

macros 🔒

num 🔒

Integer and floating-point number formatting

rtExperimental

Macros

Debug

Derive macro generating an impl of the trait Debug.

arg_new 🔒

fmt_refs 🔒

last_type 🔒

maybe_tuple_doc 🔒

peel 🔒

tuple 🔒

Structs

ArgumentV1Experimental

This struct represents the generic “argument” which is taken by the Xprintf family of functions. It contains a function to format the given value. At compile time it is ensured that the function and the value have the correct types, and then this struct is used to canonicalize arguments to one type.

PostPadding 🔒

Padding after the end of something. Returned by Formatter::padding.

UnsafeArgExperimental

This struct represents the unsafety of constructing an Arguments. It exists, rather than an unsafe function, in order to simplify the expansion of format_args!(..) and reduce the scope of the unsafe block.

Arguments

This structure represents a safely precompiled version of a format string and its arguments. This cannot be generated at runtime because it cannot safely be done, so no constructors are given and the fields are private to prevent modification.

DebugList

A struct to help with fmt::Debug implementations.

DebugMap

A struct to help with fmt::Debug implementations.

DebugSet

A struct to help with fmt::Debug implementations.

DebugStruct

A struct to help with fmt::Debug implementations.

DebugTuple

A struct to help with fmt::Debug implementations.

Error

The error type which is returned from formatting a message into a stream.

Formatter

Configuration for formatting.

Enums

Alignment

Possible alignments returned by Formatter::align

FlagV1 🔒

Statics

USIZE_MARKER 🔒 Experimental

Traits

Binary

b formatting.

Debug

? formatting.

Display

Format trait for an empty format, {}.

LowerExp

e formatting.

LowerHex

x formatting.

Octal

o formatting.

Pointer

p formatting.

UpperExp

E formatting.

UpperHex

X formatting.

Write

A trait for writing or formatting into Unicode-accepting buffers or streams.

Functions

getcount 🔒 ^⚠

pointer_fmt_inner 🔒

Since the formatting will be identical for all pointer types, use a non-monomorphized implementation for the actual formatting to reduce the amount of codegen work needed.

run 🔒 ^⚠

write

The write function takes an output stream, and an Arguments struct that can be precompiled with the format_args! macro.

Type Definitions

Result

The type returned by formatter methods.

Foreign Types

Opaque 🔒