std/fmt

Index

fn Fprint(mut w: io::Writer, args: ...any)
fn Fprintln(mut w: io::Writer, args: ...any)
fn Fprintf(mut w: io::Writer, fmt: str, args: ...any)
fn Printf(fmt: str, args: ...any)
fn Print(args: ...any)
fn Println(args: ...any)
fn Sprint(args: ...any): str
fn Format(fmt: str, args: ...any): str

Fprint

fn Fprint(mut w: io::Writer, args: ...any)

Prints arguments to w by default formatting. See documentation of format function for formatting.

Fprintln

fn Fprintln(mut w: io::Writer, args: ...any)

Prints arguments to w by default formatting. Prints new-line after arguments. See documentation of format function for formatting.

Fprintf

fn Fprintf(mut w: io::Writer, fmt: str, args: ...any)

Prints result of formatting to w. See documentation of format function for formatting.

Printf

fn Printf(fmt: str, args: ...any)

Prints result of formatting to stdout. See documentation of format function for formatting.

Print

fn Print(args: ...any)

Prints arguments by default formatting to stdout.

Println

fn Println(args: ...any)

Prints arguments by default formatting to stdout. Prints new-line after arguments.

Sprint

fn Sprint(args: ...any): str

Returns string result of arguments by default formatting.

Format

fn Format(fmt: str, args: ...any): str

It places the passes arguments in the string relative to the corresponding format string. Returns format string if len(args) == 0. If the arguments have ended, the remaining part of format string is not processed and is returned as is. For supported types it uses custom functions for conversion, but for unusupported types it uses default runtime string conversion function of type.

Formatting:

Arguments are processed sequentially. That is, when an argument
encounters a format string parameter, it will be processed according
to how many parameters it is. The 5th parameter uses the 5th argument
as the value.

Each format parameter is represented as "{}" in the format string.
These parameters will then be deleted according to the processing
algorithm and replaced with arguments.

The parameter "" is formatted as "{}" actually,
And does not increase argument list offset.

Examples:

Format("{} {}!", "Hello", "World") = "Hello World!"
Format("{} {}") = "{} {}"
Format("{} is the {}", "Pi Number") = "Pi Number is the {}"