validate_in.cpp

Validate that the value is contained on the set of valid_values

Parameters

[in]	valid_values	The valid values
[in]	value	The value

Template Parameters

Rng	The type of valid_values, deduced
T	The type of the value, deduced

Returns

OutOfRange error if value is not in valid_values

This is an example of how to use in

// Copyright 2022 Tyler Weaver
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#include <fp/all.hpp>
#include <string>
#include <vector>
 
int main() {
  const auto day = "monday";
  const auto weekends = std::vector<std::string>{"saturday", "sunday"};
  const auto result = fp::validate_in(weekends, day, "day");
  fmt::print("Is \'{}\' in {}?\n{}\n", day, weekends, result);
 
  // Output:
  // Is 'monday' in {"saturday", "sunday"}?
  // [Result<T>: [Error: [OutOfRange] day: monday is not in {"saturday",
  // "sunday"}]]
}