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Function `std.stdio.File.byLineCopy`

Returns an input range set up to read from the file handle one line at a time. Each line will be newly allocated. front will cache its value to allow repeated calls without unnecessary allocations.


						
				auto auto byLineCopy(Terminator, Char)
				(
				

				  KeepTerminator keepTerminator = No.keepTerminator,
				

				  Terminator terminator = '\x0a'
				

				)
				

				if (isScalarType!Terminator);
				

				

				auto auto byLineCopy(Terminator, Char)
				(
				

				  KeepTerminator keepTerminator,
				

				  Terminator terminator
				

				)
				

				if (is(Unqual!(ElementEncodingType!Terminator) == Unqual!Char));

Note

Due to caching byLineCopy can be more memory-efficient than File.byLine.map!idup.

The element type for the range will be Char[]. Range primitives may throw StdioException on I/O error.

Parameters

Name	Description
Char	Character type for each line, defaulting to `immutable char`.
keepTerminator	Use `Yes.keepTerminator` to include the terminator at the end of each line.
terminator	Line separator (`'\n'` by default). Use `newline` for portability (unless the file was opened in text mode).

Example

import std.algorithm, std.array, std.stdio;
// Print sorted lines of a file.
void main()
{
    auto sortedLines = File("file.txt")   // Open for reading
                       .byLineCopy()      // Read persistent lines
                       .array()           // into an array
                       .sort();           // then sort them
    foreach (line; sortedLines)
        writeln(line);
}

Authors

Walter Bright, Andrei Alexandrescu, Alex Rønne Petersen

License

Boost License 1.0.

API Documentation

Function `std.stdio.File.byLineCopy`

Note

Parameters

Example

See Also

Authors

License

API Documentation

Function std.stdio.File.byLineCopy

Note

Parameters

Example

See Also

Authors

License

Function `std.stdio.File.byLineCopy`