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`nullSink` returns the `NullSink` by reference and thus allows using it directly in code which expects an OutputRange by reference. The pattern is providing convenience wrappers for struct construction is very common in Phobos, e.g. `rebindable`, `nullable`, `refCounted`, ...
20 lines
479 B
Text
20 lines
479 B
Text
`nullSink` was added to `std.range`
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$(REF nullSink, std, range) is a convenience wrapper for $(REF NullSink, std,range)
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and creates an output range that discards the data it receives. It's the range analog
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of `/dev/null`.
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---
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import std.csv : csvNextToken;
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string line = "a,b,c";
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// ignore the first column
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line.csvNextToken(nullSink, ',', '"');
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line.popFront;
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// look at the second column
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Appender!string app;
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line.csvNextToken(app, ',', '"');
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assert(app.data == "b");
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---
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