use new optionkey.is_* methods

mesonbuild/ast/introspection.py

@@ -125,7 +125,7 @@ class IntrospectionInterpreter(AstInterpreter):
                         self.do_subproject(i)
 
         self.coredata.init_backend_options(self.backend)
-        options = {k: v for k, v in self.environment.options.items() if k.name.startswith('backend_')}
+        options = {k: v for k, v in self.environment.options.items() if k.is_backend()}
 
         self.coredata.set_options(options)
         self._add_languages(proj_langs, MachineChoice.HOST)

mesonbuild/coredata.py

@@ -89,7 +89,7 @@ class OptionKey:
     internally easier to reason about and produce.
     """
 
-    __slots__ = ['name', 'subproject', 'machine', 'lang', '_hash', '_type']
+    __slots__ = ['name', 'subproject', 'machine', 'lang', '_hash', 'type']
 
     name: str
     subproject: str

mesonbuild/interpreter.py

@@ -3142,7 +3142,7 @@ external dependencies (including libraries) must go to "dependencies".''')
         if self.environment.first_invocation:
             self.coredata.init_backend_options(backend)
 
-        options = {k: v for k, v in self.environment.options.items() if k.name.startswith('backend_')}
+        options = {k: v for k, v in self.environment.options.items() if k.is_backend()}
         self.coredata.set_options(options)
 
     @stringArgs