[gjs: 4/8] jsapi-util: use const operator getters

[Philip Chimento <pchimento src gnome org>]

commit a62e7d67c28575f83dae976f80392893ef1068a0
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Tue Oct 9 05:53:35 2018 +0200

    jsapi-util: use const operator getters

 gjs/jsapi-util.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/gjs/jsapi-util.h b/gjs/jsapi-util.h
index c48b35df..95aa5a0f 100644
--- a/gjs/jsapi-util.h
+++ b/gjs/jsapi-util.h
@@ -43,7 +43,7 @@ class GjsAutoChar : public std::unique_ptr<char, decltype(&g_free)> {
 public:
     GjsAutoChar(char *str = nullptr) : unique_ptr(str, g_free) {}
 
-    operator const char *() {
+    operator const char *() const {
         return get();
     }
 
@@ -61,7 +61,7 @@ class GjsAutoUnref : public std::unique_ptr<T, decltype(&g_object_unref)> {
 public:
     GjsAutoUnref(T *ptr = nullptr) : GjsAutoUnref::unique_ptr(ptr, g_object_unref) {}
 
-    operator T *() {
+    operator T *() const {
         return GjsAutoUnref::unique_ptr::get();
     }
 };
@@ -71,7 +71,7 @@ class GjsAutoInfo : public std::unique_ptr<T, decltype(&g_base_info_unref)> {
 public:
     GjsAutoInfo(T *ptr = nullptr) : GjsAutoInfo::unique_ptr(ptr, g_base_info_unref) {}
 
-    operator T *() { return GjsAutoInfo::unique_ptr::get(); }
+    operator T *() const { return GjsAutoInfo::unique_ptr::get(); }
 
     const char *name(void) const { return g_base_info_get_name(this->get()); }
     GIInfoType type(void) const { return g_base_info_get_type(this->get()); }
@@ -94,7 +94,7 @@ class GjsAutoParam
     GjsAutoParam(GParamSpec* ptr, const TakeOwnership&)
         : GjsAutoParam(ptr ? g_param_spec_ref(ptr) : nullptr) {}
 
-    operator GParamSpec*() { return get(); }
+    operator GParamSpec*() const { return get(); }
 };
 
 /* For use of GjsAutoParam in GC hash maps */
@@ -113,7 +113,7 @@ class GjsAutoJSChar : public std::unique_ptr<char, GjsJSFreeArgs> {
 public:
     GjsAutoJSChar(char *str = nullptr) : unique_ptr(str, GjsJSFreeArgs()) { }
 
-    operator const char*() {
+    operator const char*() const {
         return get();
     }
 
@@ -121,7 +121,7 @@ public:
         reset(str);
     }
 
-    char* copy() {
+    char* copy() const {
         /* Strings acquired by this should be g_free()'ed */
         return g_strdup(get());
     }