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-<a id="top"></a>
-# Supplying main() yourself
-
-**Contents**<br>
-[Let Catch take full control of args and config](#let-catch-take-full-control-of-args-and-config)<br>
-[Amending the config](#amending-the-config)<br>
-[Adding your own command line options](#adding-your-own-command-line-options)<br>
-[Version detection](#version-detection)<br>
-
-The easiest way to use Catch is to let it supply ```main()``` for you and handle configuring itself from the command line.
-
-This is achieved by writing ```#define CATCH_CONFIG_MAIN``` before the ```#include "catch.hpp"``` in *exactly one* source file.
-
-Sometimes, though, you need to write your own version of main(). You can do this by writing ```#define CATCH_CONFIG_RUNNER``` instead. Now you are free to write ```main()``` as normal and call into Catch yourself manually.
-
-You now have a lot of flexibility - but here are three recipes to get your started:
-
-## Let Catch take full control of args and config
-
-If you just need to have code that executes before and/ or after Catch this is the simplest option.
-
-```c++
-#define CATCH_CONFIG_RUNNER
-#include "catch.hpp"
-
-int main( int argc, char* argv[] ) {
-  // global setup...
-
-  int result = Catch::Session().run( argc, argv );
-
-  // global clean-up...
-
-  return result;
-}
-```
-
-## Amending the config
-
-If you still want Catch to process the command line, but you want to programmatically tweak the config, you can do so in one of two ways:
-
-```c++
-#define CATCH_CONFIG_RUNNER
-#include "catch.hpp"
-
-int main( int argc, char* argv[] )
-{
-  Catch::Session session; // There must be exactly one instance
- 
-  // writing to session.configData() here sets defaults
-  // this is the preferred way to set them
-    
-  int returnCode = session.applyCommandLine( argc, argv );
-  if( returnCode != 0 ) // Indicates a command line error
-        return returnCode;
- 
-  // writing to session.configData() or session.Config() here 
-  // overrides command line args
-  // only do this if you know you need to
-
-  int numFailed = session.run();
-  
-  // numFailed is clamped to 255 as some unices only use the lower 8 bits.
-  // This clamping has already been applied, so just return it here
-  // You can also do any post run clean-up here
-  return numFailed;
-}
-```
-
-Take a look at the definitions of Config and ConfigData to see what you can do with them.
-
-To take full control of the config simply omit the call to ```applyCommandLine()```.
-
-## Adding your own command line options
-
-Catch embeds a powerful command line parser called [Clara](https://github.com/philsquared/Clara). 
-As of Catch2 (and Clara 1.0) Clara allows you to write _composable_ option and argument parsers, 
-so extending Catch's own command line options is now easy.
-
-```c++
-#define CATCH_CONFIG_RUNNER
-#include "catch.hpp"
-
-int main( int argc, char* argv[] )
-{
-  Catch::Session session; // There must be exactly one instance
-  
-  int height = 0; // Some user variable you want to be able to set
-  
-  // Build a new parser on top of Catch's
-  using namespace Catch::clara;
-  auto cli 
-    = session.cli() // Get Catch's composite command line parser
-    | Opt( height, "height" ) // bind variable to a new option, with a hint string
-        ["-g"]["--height"]    // the option names it will respond to
-        ("how high?");        // description string for the help output
-        
-  // Now pass the new composite back to Catch so it uses that
-  session.cli( cli ); 
-  
-  // Let Catch (using Clara) parse the command line
-  int returnCode = session.applyCommandLine( argc, argv );
-  if( returnCode != 0 ) // Indicates a command line error
-      return returnCode;
-
-  // if set on the command line then 'height' is now set at this point
-  if( height > 0 )
-      std::cout << "height: " << height << std::endl;
-
-  return session.run();
-}
-```
-
-See the [Clara documentation](https://github.com/philsquared/Clara/blob/master/README.md) for more details.
-
-
-## Version detection
-
-Catch provides a triplet of macros providing the header's version, 
-
-* `CATCH_VERSION_MAJOR`
-* `CATCH_VERSION_MINOR`
-* `CATCH_VERSION_PATCH`
-
-these macros expand into a single number, that corresponds to the appropriate
-part of the version. As an example, given single header version v2.3.4,
-the macros would expand into `2`, `3`, and `4` respectively.
-
-
----
-
-[Home](Readme.md#top)