Show all possible Compiler paths.

[flip111]

This Pull Request adds functions to support the language designer, by showing all paths possible from the language definition. Please see the example given or view the unit tests for more examples. Design documentation is only available in english and can be found in the Internal folder.

One example (given the formatting function as used in the unit tests)

<?php
$i = 0;
foreach ($paths as $path) {
    $output[] = ++$i . ': ' .  implode(' > ', $path) .  PHP_EOL;
}

Input:

%skip space \s
%token hello Hello
%token world world!
%token goodbye Goodbye

#sentence:
    greeting() ::world::

#greeting:
    ::hello:: | ::goodbye::

Output:

1: Hello > world!
2: Goodbye > world!

[flip111]

Some problems have been found and i was stupid to commit on the master branch. I opened a new branch for this PR here https://github.com/flip111/Compiler/tree/patch-1 But i don't know how to change the PR to use a different branch.

[CircleCode]

Github PR doesn't allow to change the branch. So maybe the simplest is to create a new branch (call it with an explicit name, like for example compiler-show-paths) and open a new PR from this new branch. then reference this issue from the new PR, and close this issue so that the only remaining is the new one.

I hope people will wait until the new PR is open to make comments so that they are all in the same place.

[Hywan]

Is the new PR opened?

[flip111]

new PR is here https://github.com/hoaproject/Compiler/pull/23