streamed_replace()

template<typename T >

void syten::streamed_replace	(	std::ostream &	out,
		std::string const &	input,
		std::string const &	start_delim,
		std::string const &	end_delim,
		T	func
	)

Replaces occurences of delimited substrings by function return values.

Given a string input and two delimiter strings start_delim and end_delim, searches for all pairwise occurences of the delimiters, extracts the characters between them and calls the function func with those characters as argument, then replaces the delimiters plus internal content by the return value of the function and streams the result into the supplied output stream.

Parameters

out	output stream into which data is written
input	input string
start_delim	delimiter denoting the start of a replacee string
end_delim	delimiter denoting the end of a replacee string
func	function to call to get the replacer

Example\n stream_replace("a {b} c {d e} f} {g", "{", "}",

toupper), with toupper a function taking a std::string and returning an all-uppercase version thereof results in a B c D E f} {g being written to the output stream and a warning about a runaway argument.

References std::string::find(), std::flush(), logGE(), std::string::size(), std::string::substr(), and SYTEN_ASSERT_MSG.

Referenced by do_expval().

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