ui/posframe: less disruptive emacs version warnings; use constants

modules/ui/posframe/config.el

@@ -1,9 +1,5 @@
 ;;; ui/posframe/config.el -*- lexical-binding: t; -*-
 
-(when (version< emacs-version "26")
-  (error "The :ui posframe module requires Emacs 26+"))
-
-
 (def-package! posframe
   :defer t
   :config
@@ -13,6 +9,7 @@
 
 (def-package! company-childframe
   :when (featurep! :completion company)
+  :when EMACS26+
   :after company
   :config
   (setq company-childframe-notification nil)
@@ -23,6 +20,7 @@
 
 (def-package! ivy-posframe
   :when (featurep! :completion ivy)
+  :when EMACS26+
   :after ivy
   :preface
   ;; This function searches the entire `obarray' just to populate

modules/ui/posframe/doctor.el

@@ -1,5 +1,5 @@
 ;; -*- lexical-binding: t; no-byte-compile: t; -*-
 ;;; ui/posframe/doctor.el
 
-(when (version< emacs-version "26")
+(unless EMACS26+
   (error! "This module doesn't work in Emacs %s (minimum: Emacs 26)" emacs-version))

modules/ui/posframe/packages.el

@@ -1,7 +1,8 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; ui/posframe/packages.el
 
-(when (featurep! :completion company)
+(when EMACS26+
-  (package! company-childframe))
+  (when (featurep! :completion company)
-(when (featurep! :completion ivy)
+    (package! company-childframe))
-  (package! ivy-posframe))
+  (when (featurep! :completion ivy)
+    (package! ivy-posframe)))