std/fmt ​

Functions ​

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 {}"

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

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

fn Print(args: ...any)

Prints arguments by default formatting to stdout.

fn Println(args: ...any)

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

fn Fprint(mut f: &os::File, args: ...any)

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

fn Fprintln(mut f: &os::File, args: ...any)

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

fn Fprintf(mut f: &os::File, fmt: str, args: ...any)

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

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

Returns string result of arguments by default formatting.