app/layers: consolidate signed/unsigned usage

* Also make use of optional's operator* where appropriate.

Signed-off-by: Marcus Fritzsch <marcus_fritzsch@mentor.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/app.hpp b/src/app.hpp
index c8ea01b..297b6af 100644
--- a/src/app.hpp
+++ b/src/app.hpp
@@ -120,10 +120,10 @@ struct App {
 
    // ID allocation and proxy methods for lookup
    struct id_allocator id_alloc;
-   optional<unsigned> lookup_id(char const *name) {
+   optional<int> lookup_id(char const *name) {
       return this->id_alloc.lookup(std::string(name));
    }
-   optional<std::string> lookup_name(unsigned id) {
+   optional<std::string> lookup_name(int id) {
       return this->id_alloc.lookup(id);
    }
 
@@ -177,10 +177,10 @@ struct App {
    void emit_invisible(char const *label);
    void emit_visible(char const *label);
 
-   void activate(unsigned id);
-   void deactivate(unsigned id);
+   void activate(int id);
+   void deactivate(int id);
 
-   bool can_split(unsigned new_id);
+   bool can_split(int new_id);
 };
 
 }  // namespace wm