class function / class procedure members inside a generic class

• Type: feature (parser — generics, Track A)
• Status: done
• Opened: 2026-07-04 (bisecting the fgl wall; see [[fpc-lcl-compile-probe]])

Problem

A static (class) method works in a normal class but NOT inside a generic class:

type
  TB = class class function M: Boolean; virtual; end;    { OK }

  generic TG<T> = class
    class function M: Boolean;                            { pascal26: unexpected token }
  end;

Non-generic class function/class procedure (incl. virtual/override) parse fine; only the generic-class member parser chokes on the leading class method qualifier. fgl.pp's generic TFPGList<T> has class Function ItemIsManaged : Boolean; override;, so this is one of fgl's walls.

Fix (Track A, parser.inc)

The generic-class body parser (the buffered-generic path) needs to accept the class prefix on a method member the same way the ordinary class-body parser does (isClassMethod). Mirror that handling into the generic member loop.

Acceptance

• class function/class procedure (plain, virtual, override) inside a generic … = class compiles and specializes.
• Self-host byte-identical; make test green; regression .pas.

Resolution (2026-07-04)

DONE. Root cause was NOT the class-body member parser (it already handled isClassMethod) — ParseGenericTemplate's depth scan counted the class member prefix as a nested body opener and swallowed the unit into the template buffer. Fixed by peeking the following token (function/procedure/var/property/of + soft ctor/dtor/operator = prefix). Second half: BufferGenericMethod now starts the captured range at the class token for class-method impls. Regression test/test_generic_class_methods.pas (5/5, incl. virtual/override on generic + class procedure) in test-core. Self-host byte-identical, make test green.