Add automatic generation of headers

- The 'stripdecls.py' script replaces declarations in all headers by includes to
  generated headers.
  `ag '#\s*if(?!ndef NEOVIM_).*((?!#\s*endif).*\n)*#ifdef INCLUDE_GENERATED'`
  was used for this.
- Add and integrate gendeclarations.lua into the build system to generate the
  required includes.
- Add -Wno-unused-function
- Made a bunch of old-style definitions ANSI

This adds a requirement: all type and structure definitions must be present
before INCLUDE_GENERATED_DECLARATIONS-protected include.

Warning: mch_expandpath (path.h.generated.h) was moved manually. So far it is
the only exception.

1 files changed, 4 insertions, 39 deletions

diff --git a/src/nvim/ex_eval.h b/src/nvim/ex_eval.h
index 6af82d3f3c..7523aff792 100644
--- a/src/nvim/ex_eval.h
+++ b/src/nvim/ex_eval.h
@@ -118,42 +118,7 @@ struct cleanup_stuff {
   except_T *exception;          /* exception value */
 };
 
-/* ex_eval.c */
-int aborting(void);
-void update_force_abort(void);
-int should_abort(int retcode);
-int aborted_in_try(void);
-int cause_errthrow(char_u *mesg, int severe, int *ignore);
-void free_global_msglist(void);
-void do_errthrow(struct condstack *cstack, char_u *cmdname);
-int do_intthrow(struct condstack *cstack);
-char_u *get_exception_string(void *value, int type, char_u *cmdname,
-                             int *should_free);
-void discard_current_exception(void);
-void report_make_pending(int pending, void *value);
-void report_resume_pending(int pending, void *value);
-void report_discard_pending(int pending, void *value);
-void ex_if(exarg_T *eap);
-void ex_endif(exarg_T *eap);
-void ex_else(exarg_T *eap);
-void ex_while(exarg_T *eap);
-void ex_continue(exarg_T *eap);
-void ex_break(exarg_T *eap);
-void ex_endwhile(exarg_T *eap);
-void ex_throw(exarg_T *eap);
-void do_throw(struct condstack *cstack);
-void ex_try(exarg_T *eap);
-void ex_catch(exarg_T *eap);
-void ex_finally(exarg_T *eap);
-void ex_endtry(exarg_T *eap);
-void enter_cleanup(cleanup_T *csp);
-void leave_cleanup(cleanup_T *csp);
-int cleanup_conditionals(struct condstack *cstack, int searched_cond,
-                         int inclusive);
-void rewind_conditionals(struct condstack *cstack, int idx,
-                         int cond_type,
-                         int *cond_level);
-void ex_endfunction(exarg_T *eap);
-int has_loop_cmd(char_u *p);
-
-#endif /* NVIM_EX_EVAL_H */
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "ex_eval.h.generated.h"
+#endif
+#endif  // NVIM_EX_EVAL_H