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Adding better boost testing on old compilers

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Henry Fredrick Schreiner 2018-04-04 17:31:18 +02:00 committed by Henry Schreiner
parent 9c700eca3e
commit de06d50f34
3 changed files with 7 additions and 3 deletions
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2
README.md
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@ -164,7 +164,7 @@ An option name must start with a alphabetic character or underscore. For long op
On a C++14 compiler, you can pass a callback function directly to `.add_flag`, while in C++11 mode you'll need to use `.add_flag_function` if you want a callback function. The function will be given the number of times the flag was passed. You can throw a relevant `CLI::ParseError` to signal a failure.
On a compiler that supports C++17's `__has_include`, you can also use `std::optional`, `std::experimental::optional`, and `boost::optional` directly in an `add_option` call. See [CLI11 Internals] for information on how this was done and how you can add your own converters.
On a compiler that supports C++17's `__has_include`, you can also use `std::optional`, `std::experimental::optional`, and `boost::optional` directly in an `add_option` call. If you don't have `__has_include`, you can define `CLI11_BOOST_OPTIONAL` before including CLI11 to manually add support for `boost::optional`. See [CLI11 Internals] for information on how this was done and how you can add your own converters.
### Example

4
include/CLI/Optional.hpp
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@ -29,7 +29,7 @@
namespace CLI {
#ifdef CLI11_STD_OPTIONAL
template <typename T> std::istream &operator>>(std::istream &in, std::optional<T> &val) {
template <typename T> std::istringstream &operator>>(std::istringstream &in, std::optional<T> &val) {
T v;
in >> v;
val = v;
@ -38,7 +38,7 @@ template <typename T> std::istream &operator>>(std::istream &in, std::optional<T
#endif
#ifdef CLI11_EXPERIMENTAL_OPTIONAL
template <typename T> std::istream &operator>>(std::istream &in, std::experimental::optional<T> &val) {
template <typename T> std::istringstream &operator>>(std::istringstream &in, std::experimental::optional<T> &val) {
T v;
in >> v;
val = v;

4
tests/CMakeLists.txt
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@ -76,5 +76,9 @@ find_package(Boost 1.35)
if(Boost_FOUND)
target_link_libraries(informational PUBLIC Boost::boost)
target_link_libraries(OptionalTest PUBLIC Boost::boost)
# Enforce Boost::Optional even if __has_include is missing on your compiler
target_compile_definitions(informational PUBLIC CLI11_BOOST_OPTIONAL)
target_compile_definitions(OptionalTest PUBLIC CLI11_BOOST_OPTIONAL)
endif()