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version 2.108.0

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Function std.stdio.File.byRecord

Creates an input range set up to parse one line at a time from the file into a tuple.

auto byRecord(Fields...) (
  string format
);

Range primitives may throw StdioException on I/O error.

Parameters

NameDescription
format tuple record format

Returns

The input range set up to parse one line at a time into a record tuple.

See Also

It is similar to byLine and uses format under the hood.

Example

static import std.file;
import std.typecons : tuple;

// prepare test file
auto testFile = std.file.deleteme();
scope(failure) printf("Failed test at line %d\n", __LINE__);
write(testFile, "1 2\n4 1\n5 100");
scope(exit) remove(testFile);

File f = File(testFile);
scope(exit) f.close();

auto expected = [tuple(1, 2), tuple(4, 1), tuple(5, 100)];
uint i;
foreach (e; f.byRecord!(int, int)("%s %s"))
{
    writeln(e); // expected[i++]
}

Authors

Walter Bright, Andrei Alexandrescu, Alex Rønne Petersen

License

Boost License 1.0.