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Function `std.regex.replaceFirstInto`

A variation on replaceFirst that instead of allocating a new string on each call outputs the result piece-wise to the sink. In particular this enables efficient construction of a final output incrementally.


						
				void replaceFirstInto(Sink, R, C, RegEx)(
				
  ref Sink sink,
				
  R input,
				
  RegEx re,
				
  const(C)[] format
				

				) @trusted
				

				if (isOutputRange!(Sink, dchar) && isSomeString!R && is(C : dchar) && isRegexFor!(RegEx, R));
				

				

				void replaceFirstInto(alias fun, Sink, R, RegEx)(
				
  Sink sink,
				
  R input,
				
  RegEx re
				

				) @trusted
				

				if (isOutputRange!(Sink, dchar) && isSomeString!R && isRegexFor!(RegEx, R));

Like in replaceFirst family of functions there is an overload for the substitution guided by the format string and the one with the user defined callback.

Example

import std.array;
string m1 = "first message\n";
string m2 = "second message\n";
auto result = appender!string();
replaceFirstInto(result, m1, regex(`([a-z]+) message`), "");
//equivalent of the above with user-defined callback
replaceFirstInto!(cap=>cap[1])(result, m2, regex(`([a-z]+) message`));
writeln(result.data); // "first\nsecond\n"

Authors

Dmitry Olshansky,

API and utility constructs are modeled after the original std.regex by Walter Bright and Andrei Alexandrescu.

License

Boost License 1.0.