how to parse string

[mirekh68]

I have problem with parsing example like this:

auto result1 = scn::scan<std::string, double>(":x22x , 3.14", ":x{}x , {}");

Either I dont understand something or documentation is missing important case ?
the other case like this:

auto result1 = scn::scan<std::string, double>(":x22x , 3.14", ":x{}x , {}");
works as expected. How to tackle the string case ?

[eliaskosunen]

The default behavior for reading a string is to scan until a whitespace character: https://www.scnlib.dev/latest/group__format-string.html#type-string, which is the same behavior as with scanf and %s. Therefore, the following is what happens:

auto result = scn::scan<std::string>("x22x", "x{}");
// result->value() == "22x"

The format string following the {} is not inspected to determine, what characters to accept when reading a string, and when to stop reading. To determine what characters to accept, the character set syntax can be used:

// [^x]: accept everything but 'x'
auto result = scn::scan<std::string, double>(":x22x , 3.14", ":x{:[^x]}x , {}");
// std::get<0>(result->values()) == "22"
// std::get<1>(result->values()) == 3.14

Your second case is identical to the first, so I can't help with that.

See also: #94 (comment)