Typed class constants support

[thekid]

In a nutshell

class T {
  public const string NAME= 'Test';
}

• [x] Syntactic support with erasure at compile time (see xp-framework/compiler@cad16ee)
• [x] Emit type in meta information for PHP < 8.3
• [x] Extend reflection to support types for class constants
• [x] Emit types once the Typed class constants RFC implementation is merged into PHP 8.3

See also

• https://wiki.php.net/rfc/typed_class_constants - RFC
• https://github.com/php/php-src/pull/10444 - RFC implementation
• https://github.com/xp-framework/compiler/pull/163 - Emit meta information
• https://github.com/xp-framework/reflection/pull/32 - Extend reflection
• https://github.com/xp-framework/compiler/pull/165 - Emit types

[thekid]

The RFC has been accepted, need to wait for https://github.com/php/php-src/pull/10444 before adding this to the PHP 8.3 emitter.

[thekid]

PR has been merged, the build from https://github.com/shivammathur/php-builder-windows/actions/runs/4715949822 contains the change:

$ XP_RT=8.3 xp -w 'class T { const string NAME= "Test"; } return T::NAME'
Test

[thekid]

Released in https://github.com/xp-framework/compiler/releases/tag/v8.11.0