Display the source code in std/stdio.d from which this page was generated on github.

If you spot a problem with this page, click here to create a Bugzilla issue.

Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Module `std.stdio`

Standard I/O functions that extend core.stdc.stdio. core.stdc.stdio is publically imported when importing std.stdio.

Functions

Name	Description
`chunks(f, size)`	Iterates through a file a chunk at a time by using `foreach`.
`openNetwork(host, port)`	Experimental network access via the File interface
`popen(name, mode)`	Convenience function that forwards to `core.sys.posix.stdio.popen` with appropriately-constructed C-style strings.
`readf(args)`	Reads formatted data from `stdin` using `formattedRead`.
`readln(terminator)`	Read line from `stdin`.
`readln(buf, terminator)`	Read line from `stdin` and write it to buf[], including terminating character.
`toFile(data, fileName)`	Writes an array or range to a file. Shorthand for `data.copy(File(fileName, "wb").lockingBinaryWriter)`. Similar to `write`, strings are written as-is, rather than encoded according to the `File`'s orientation.
`write(args)`	For each argument `arg` in `args`, format the argument (using `to`) and write the resulting string to `args[0]`. A call without any arguments will fail to compile.
`writef(args)`	Writes formatted data to standard output (without a trailing newline).
`writefln(args)`	Equivalent to `writef(fmt, args, '\n')`.
`writeln(args)`	Equivalent to `write(args, '\n')`. Calling `writeln` without arguments is valid and just prints a newline to the standard output.

Classes

Name	Description
`StdioException`	Thrown if I/O errors happen.

Structs

Name	Description
`File`	Encapsulates a `FILE`. Generally D does not attempt to provide thin wrappers over equivalent functions in the C standard library, but manipulating `FILE` values directly is unsafe and error-prone in many ways. The `File` type ensures safe manipulation, automatic file closing, and a lot of convenience.
`lines`	Iterates through the lines of a file by using `foreach`.

Enums

Name	Description
`LockType`	Used to specify the lock type for `File.lock` and `File.tryLock`.

Manifest constants

Name	Type	Description
`isFileHandle`		Indicates whether `T` is a file handle, i.e. the type is implicitly convertable to `File` or a pointer to a `FILE`.

Aliases

Name	Type	Description
`KeepTerminator`	`Flag!("keepTerminator")`	If flag `KeepTerminator` is set to `KeepTerminator.yes`, then the delimiter is included in the strings returned.
`stderr`		The standard error stream.
`stdin`		The standard input stream.
`stdout`		The standard output stream.

Authors

Walter Bright, Andrei Alexandrescu, Alex Rønne Petersen

License

Boost License 1.0.