зеркало из https://github.com/github/ruby.git
Eagerly name modules and classes
* variable.c: make the hidden ivars `classpath` and `tmp_classpath` the source of truth for module and constant names. Assign to them when modules are bind to constants. * variable.c: remove references to module name cache, as what used to be the cache is now the source of truth. Remove rb_class_path_no_cache(). * variable.c: remove the hidden ivar `classid`. This existed for the purposes of module name search, which is now replaced. Also, remove the associated rb_name_class(). * class.c: use rb_set_class_path_string to set the name of Object during boot. Must use a fstring as this runs before rb_cString is initialized and creating a normal string leads to a VALUE without a class. * spec/ruby/core/module/name_spec.rb: add a few specs to specify what happens to Module#name across multiple operations. These specs pass without other code changes in this commit. [Feature #15765]
This commit is contained in:
Alan Wu
Nobuyoshi Nakada
Родитель
a829be209f
Коммит
b00f280d4b
5
class.c
5
class.c
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@ -537,7 +537,6 @@ boot_defclass(const char *name, VALUE super)
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VALUE obj = rb_class_boot(super);
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ID id = rb_intern(name);
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rb_name_class(obj, id);
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rb_const_set((rb_cObject ? rb_cObject : obj), id, obj);
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rb_vm_add_root_module(id, obj);
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return obj;
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@ -551,7 +550,7 @@ Init_class_hierarchy(void)
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rb_gc_register_mark_object(rb_cObject);
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/* resolve class name ASAP for order-independence */
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rb_class_name(rb_cObject);
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rb_set_class_path_string(rb_cObject, rb_cObject, rb_fstring_lit("Object"));
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rb_cModule = boot_defclass("Module", rb_cObject);
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rb_cClass = boot_defclass("Class", rb_cModule);
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@ -669,7 +668,6 @@ rb_define_class(const char *name, VALUE super)
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}
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klass = rb_define_class_id(id, super);
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rb_vm_add_root_module(id, klass);
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rb_name_class(klass, id);
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rb_const_set(rb_cObject, id, klass);
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rb_class_inherited(super, klass);
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@ -767,7 +765,6 @@ rb_define_module_id(ID id)
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VALUE mdl;
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mdl = rb_module_new();
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rb_name_class(mdl, id);
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return mdl;
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}
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6
gc.c
6
gc.c
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@ -11097,7 +11097,7 @@ rb_raw_obj_info(char *buff, const int buff_size, VALUE obj)
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}
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else {
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if (RTEST(RBASIC(obj)->klass)) {
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VALUE class_path = rb_class_path_cached(RBASIC(obj)->klass);
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VALUE class_path = rb_class_path(RBASIC(obj)->klass);
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if (!NIL_P(class_path)) {
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APPENDF((BUFF_ARGS, "(%s)", RSTRING_PTR(class_path)));
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}
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@ -11151,7 +11151,7 @@ rb_raw_obj_info(char *buff, const int buff_size, VALUE obj)
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case T_CLASS:
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case T_MODULE:
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{
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VALUE class_path = rb_class_path_cached(obj);
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VALUE class_path = rb_class_path(obj);
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if (!NIL_P(class_path)) {
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APPENDF((BUFF_ARGS, "%s", RSTRING_PTR(class_path)));
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}
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@ -11159,7 +11159,7 @@ rb_raw_obj_info(char *buff, const int buff_size, VALUE obj)
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}
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case T_ICLASS:
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{
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VALUE class_path = rb_class_path_cached(RBASIC_CLASS(obj));
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VALUE class_path = rb_class_path(RBASIC_CLASS(obj));
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if (!NIL_P(class_path)) {
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APPENDF((BUFF_ARGS, "src:%s", RSTRING_PTR(class_path)));
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}
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@ -949,7 +949,6 @@ void rb_set_class_path(VALUE, VALUE, const char*);
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void rb_set_class_path_string(VALUE, VALUE, VALUE);
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VALUE rb_path_to_class(VALUE);
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VALUE rb_path2class(const char*);
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void rb_name_class(VALUE, ID);
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VALUE rb_class_name(VALUE);
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VALUE rb_autoload_load(VALUE, ID);
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VALUE rb_autoload_p(VALUE, ID);
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@ -18,6 +18,33 @@ describe "Module#name" do
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m::N.name.should =~ /#<Module:0x[0-9a-f]+>::N/
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end
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it "changes when the module is reachable through a constant path" do
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m = Module.new
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module m::N; end
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m::N.name.should =~ /#<Module:0x[0-9a-f]+>::N/
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ModuleSpecs::Anonymous::WasAnnon = m::N
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m::N.name.should == "ModuleSpecs::Anonymous::WasAnnon"
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end
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it "is set after it is removed from a constant" do
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module ModuleSpecs
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module ModuleToRemove
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end
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mod = ModuleToRemove
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remove_const(:ModuleToRemove)
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mod.name.should == "ModuleSpecs::ModuleToRemove"
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end
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end
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it "is set after it is removed from a constant under an anonymous module" do
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m = Module.new
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module m::Child; end
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child = m::Child
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m.send(:remove_const, :Child)
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child.name.should =~ /#<Module:0x[0-9a-f]+>::Child/
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end
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it "is set when opened with the module keyword" do
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ModuleSpecs.name.should == "ModuleSpecs"
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end
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@ -40,6 +67,15 @@ describe "Module#name" do
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m.name.should == "ModuleSpecs::Anonymous::B"
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end
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it "is not modified when assigned to a different anonymous module" do
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m = Module.new
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module m::M; end
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first_name = m::M.name.dup
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module m::N; end
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m::N::F = m::M
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m::M.name.should == first_name
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end
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# http://bugs.ruby-lang.org/issues/6067
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it "is set with a conditional assignment to a nested constant" do
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eval("ModuleSpecs::Anonymous::F ||= Module.new")
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322
variable.c
322
variable.c
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@ -25,7 +25,7 @@
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#include "transient_heap.h"
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static struct rb_id_table *rb_global_tbl;
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static ID autoload, classpath, tmp_classpath, classid;
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static ID autoload, classpath, tmp_classpath;
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static VALUE autoload_featuremap; /* feature => autoload_i */
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static void check_before_mod_set(VALUE, ID, VALUE, const char *);
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@ -59,8 +59,6 @@ Init_var_tables(void)
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classpath = rb_intern_const("__classpath__");
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/* __tmp_classpath__: temporary class path which contains anonymous names */
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tmp_classpath = rb_intern_const("__tmp_classpath__");
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/* __classid__: name given to class/module under an anonymous namespace */
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classid = rb_intern_const("__classid__");
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}
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static inline bool
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@ -73,163 +71,29 @@ rb_namespace_p(VALUE obj)
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return false;
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}
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struct fc_result {
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ID name, preferred;
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VALUE klass;
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VALUE path;
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VALUE track;
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struct fc_result *prev;
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};
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static VALUE
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fc_path(struct fc_result *fc, ID name)
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{
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VALUE path, tmp;
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path = rb_id2str(name);
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while (fc) {
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st_data_t n;
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if (fc->track == rb_cObject) break;
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if (RCLASS_IV_TBL(fc->track) &&
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st_lookup(RCLASS_IV_TBL(fc->track), (st_data_t)classpath, &n)) {
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tmp = rb_str_dup((VALUE)n);
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rb_str_cat2(tmp, "::");
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rb_str_append(tmp, path);
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path = tmp;
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break;
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}
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tmp = rb_str_dup(rb_id2str(fc->name));
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rb_str_cat2(tmp, "::");
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rb_str_append(tmp, path);
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path = tmp;
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fc = fc->prev;
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}
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OBJ_FREEZE(path);
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return path;
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}
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static enum rb_id_table_iterator_result
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fc_i(ID key, VALUE v, void *a)
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{
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rb_const_entry_t *ce = (rb_const_entry_t *)v;
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struct fc_result *res = a;
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VALUE value = ce->value;
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if (!rb_is_const_id(key)) return ID_TABLE_CONTINUE;
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if (value == res->klass && (!res->preferred || key == res->preferred)) {
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res->path = fc_path(res, key);
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return ID_TABLE_STOP;
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}
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if (rb_namespace_p(value)) {
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if (!RCLASS_CONST_TBL(value)) return ID_TABLE_CONTINUE;
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else {
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struct fc_result arg;
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struct fc_result *list;
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list = res;
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while (list) {
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if (list->track == value) return ID_TABLE_CONTINUE;
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list = list->prev;
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}
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arg.name = key;
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arg.preferred = res->preferred;
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arg.path = 0;
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arg.klass = res->klass;
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arg.track = value;
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arg.prev = res;
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rb_id_table_foreach(RCLASS_CONST_TBL(value), fc_i, &arg);
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if (arg.path) {
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res->path = arg.path;
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return ID_TABLE_STOP;
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}
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}
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}
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return ID_TABLE_CONTINUE;
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}
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/**
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* Traverse constant namespace and find +classpath+ for _klass_. If
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* _preferred_ is not 0, choice the path whose base name is set to it.
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* If +classpath+ is found, the hidden instance variable __classpath__
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* is set to the found path, and __tmp_classpath__ is removed.
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* The path is frozen.
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*/
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static VALUE
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find_class_path(VALUE klass, ID preferred)
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{
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struct fc_result arg;
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arg.preferred = preferred;
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arg.name = 0;
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arg.path = 0;
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arg.klass = klass;
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arg.track = rb_cObject;
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arg.prev = 0;
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if (RCLASS_CONST_TBL(rb_cObject)) {
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rb_id_table_foreach(RCLASS_CONST_TBL(rb_cObject), fc_i, &arg);
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}
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if (arg.path) {
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st_data_t tmp = tmp_classpath;
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if (!RCLASS_IV_TBL(klass)) {
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RCLASS_IV_TBL(klass) = st_init_numtable();
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}
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rb_class_ivar_set(klass, classpath, arg.path);
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st_delete(RCLASS_IV_TBL(klass), &tmp, 0);
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return arg.path;
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}
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return Qnil;
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}
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/**
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* Returns +classpath+ of _klass_, if it is named, or +nil+ for
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* anonymous +class+/+module+. The last part of named +classpath+ is
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* never anonymous, but anonymous +class+/+module+ names may be
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* contained. If the path is "permanent", that means it has no
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* anonymous names, <code>*permanent</code> is set to 1.
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* anonymous +class+/+module+. A named +classpath+ may contain
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* an anonymous component, but the last component is guaranteed
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* to not be anonymous. <code>*permanent</code> is set to 1
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* if +classpath+ has no anonymous components. There is no builtin
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* Ruby level APIs that can change a permanent +classpath+.
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*/
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static VALUE
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classname(VALUE klass, int *permanent)
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{
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VALUE path = Qnil;
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st_table *ivtbl;
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st_data_t n;
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if (!klass) klass = rb_cObject;
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*permanent = 1;
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if (RCLASS_IV_TBL(klass)) {
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if (!st_lookup(RCLASS_IV_TBL(klass), (st_data_t)classpath, &n)) {
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ID cid = 0;
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if (st_lookup(RCLASS_IV_TBL(klass), (st_data_t)classid, &n)) {
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VALUE cname = (VALUE)n;
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cid = rb_check_id(&cname);
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if (cid) path = find_class_path(klass, cid);
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}
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if (NIL_P(path)) {
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path = find_class_path(klass, (ID)0);
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}
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if (NIL_P(path)) {
|
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if (!cid) {
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return Qnil;
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}
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if (!st_lookup(RCLASS_IV_TBL(klass), (st_data_t)tmp_classpath, &n)) {
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path = rb_id2str(cid);
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return path;
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}
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*permanent = 0;
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path = (VALUE)n;
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return path;
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}
|
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}
|
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else {
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path = (VALUE)n;
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}
|
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if (!RB_TYPE_P(path, T_STRING)) {
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rb_bug("class path is not set properly");
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}
|
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return path;
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*permanent = 0;
|
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if (!RCLASS_EXT(klass)) return Qnil;
|
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if (!(ivtbl = RCLASS_IV_TBL(klass))) return Qnil;
|
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if (st_lookup(ivtbl, (st_data_t)classpath, &n)) {
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*permanent = 1;
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return (VALUE)n;
|
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}
|
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return find_class_path(klass, (ID)0);
|
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if (st_lookup(ivtbl, (st_data_t)tmp_classpath, &n)) return (VALUE)n;
|
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return Qnil;
|
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}
|
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|
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/*
|
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|
|
@ -268,22 +132,16 @@ make_temporary_path(VALUE obj, VALUE klass)
|
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return path;
|
||||
}
|
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|
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typedef VALUE (*path_cache_func)(VALUE obj, VALUE name);
|
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typedef VALUE (*fallback_func)(VALUE obj, VALUE name);
|
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|
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static VALUE
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rb_tmp_class_path(VALUE klass, int *permanent, path_cache_func cache_path)
|
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rb_tmp_class_path(VALUE klass, int *permanent, fallback_func fallback)
|
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{
|
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VALUE path = classname(klass, permanent);
|
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st_data_t n = (st_data_t)path;
|
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|
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if (!NIL_P(path)) {
|
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return path;
|
||||
}
|
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if (RCLASS_IV_TBL(klass) && st_lookup(RCLASS_IV_TBL(klass),
|
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(st_data_t)tmp_classpath, &n)) {
|
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*permanent = 0;
|
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return (VALUE)n;
|
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}
|
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else {
|
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if (RB_TYPE_P(klass, T_MODULE)) {
|
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if (rb_obj_class(klass) == rb_cModule) {
|
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|
|
@ -291,40 +149,19 @@ rb_tmp_class_path(VALUE klass, int *permanent, path_cache_func cache_path)
|
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}
|
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else {
|
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int perm;
|
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path = rb_tmp_class_path(RBASIC(klass)->klass, &perm, cache_path);
|
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path = rb_tmp_class_path(RBASIC(klass)->klass, &perm, fallback);
|
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}
|
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}
|
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*permanent = 0;
|
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return cache_path(klass, path);
|
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return fallback(klass, path);
|
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}
|
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}
|
||||
|
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static VALUE
|
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ivar_cache(VALUE obj, VALUE name)
|
||||
{
|
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return rb_ivar_set(obj, tmp_classpath, make_temporary_path(obj, name));
|
||||
}
|
||||
|
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VALUE
|
||||
rb_class_path(VALUE klass)
|
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{
|
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int permanent;
|
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VALUE path = rb_tmp_class_path(klass, &permanent, ivar_cache);
|
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if (!NIL_P(path)) path = rb_str_dup(path);
|
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return path;
|
||||
}
|
||||
|
||||
static VALUE
|
||||
null_cache(VALUE obj, VALUE name)
|
||||
{
|
||||
return make_temporary_path(obj, name);
|
||||
}
|
||||
|
||||
VALUE
|
||||
rb_class_path_no_cache(VALUE klass)
|
||||
{
|
||||
int permanent;
|
||||
VALUE path = rb_tmp_class_path(klass, &permanent, null_cache);
|
||||
VALUE path = rb_tmp_class_path(klass, &permanent, make_temporary_path);
|
||||
if (!NIL_P(path)) path = rb_str_dup(path);
|
||||
return path;
|
||||
}
|
||||
|
|
@ -332,18 +169,12 @@ rb_class_path_no_cache(VALUE klass)
|
|||
VALUE
|
||||
rb_class_path_cached(VALUE klass)
|
||||
{
|
||||
st_table *ivtbl;
|
||||
st_data_t n;
|
||||
|
||||
if (!RCLASS_EXT(klass)) return Qnil;
|
||||
if (!(ivtbl = RCLASS_IV_TBL(klass))) return Qnil;
|
||||
if (st_lookup(ivtbl, (st_data_t)classpath, &n)) return (VALUE)n;
|
||||
if (st_lookup(ivtbl, (st_data_t)tmp_classpath, &n)) return (VALUE)n;
|
||||
return Qnil;
|
||||
int permanent;
|
||||
return classname(klass, &permanent);
|
||||
}
|
||||
|
||||
static VALUE
|
||||
never_cache(VALUE obj, VALUE name)
|
||||
no_fallback(VALUE obj, VALUE name)
|
||||
{
|
||||
return name;
|
||||
}
|
||||
|
|
@ -352,7 +183,13 @@ VALUE
|
|||
rb_search_class_path(VALUE klass)
|
||||
{
|
||||
int permanent;
|
||||
return rb_tmp_class_path(klass, &permanent, never_cache);
|
||||
return rb_tmp_class_path(klass, &permanent, no_fallback);
|
||||
}
|
||||
|
||||
static VALUE
|
||||
save_temporary_path(VALUE obj, VALUE name)
|
||||
{
|
||||
return rb_ivar_set(obj, tmp_classpath, make_temporary_path(obj, name));
|
||||
}
|
||||
|
||||
void
|
||||
|
|
@ -366,13 +203,12 @@ rb_set_class_path_string(VALUE klass, VALUE under, VALUE name)
|
|||
}
|
||||
else {
|
||||
int permanent;
|
||||
str = rb_str_dup(rb_tmp_class_path(under, &permanent, ivar_cache));
|
||||
str = rb_str_dup(rb_tmp_class_path(under, &permanent, save_temporary_path));
|
||||
rb_str_cat2(str, "::");
|
||||
rb_str_append(str, name);
|
||||
OBJ_FREEZE(str);
|
||||
if (!permanent) {
|
||||
pathid = tmp_classpath;
|
||||
rb_ivar_set(klass, classid, rb_str_intern(name));
|
||||
}
|
||||
}
|
||||
rb_ivar_set(klass, pathid, str);
|
||||
|
|
@ -389,12 +225,11 @@ rb_set_class_path(VALUE klass, VALUE under, const char *name)
|
|||
}
|
||||
else {
|
||||
int permanent;
|
||||
str = rb_str_dup(rb_tmp_class_path(under, &permanent, ivar_cache));
|
||||
str = rb_str_dup(rb_tmp_class_path(under, &permanent, save_temporary_path));
|
||||
rb_str_cat2(str, "::");
|
||||
rb_str_cat2(str, name);
|
||||
if (!permanent) {
|
||||
pathid = tmp_classpath;
|
||||
rb_ivar_set(klass, classid, rb_str_intern(rb_str_new_cstr(name)));
|
||||
}
|
||||
}
|
||||
OBJ_FREEZE(str);
|
||||
|
|
@ -449,12 +284,6 @@ rb_path2class(const char *path)
|
|||
return rb_path_to_class(rb_str_new_cstr(path));
|
||||
}
|
||||
|
||||
void
|
||||
rb_name_class(VALUE klass, ID id)
|
||||
{
|
||||
rb_ivar_set(klass, classid, ID2SYM(id));
|
||||
}
|
||||
|
||||
VALUE
|
||||
rb_class_name(VALUE klass)
|
||||
{
|
||||
|
|
@ -465,7 +294,7 @@ const char *
|
|||
rb_class2name(VALUE klass)
|
||||
{
|
||||
int permanent;
|
||||
VALUE path = rb_tmp_class_path(rb_class_real(klass), &permanent, ivar_cache);
|
||||
VALUE path = rb_tmp_class_path(rb_class_real(klass), &permanent, make_temporary_path);
|
||||
if (NIL_P(path)) return NULL;
|
||||
return RSTRING_PTR(path);
|
||||
}
|
||||
|
|
@ -2853,6 +2682,64 @@ check_before_mod_set(VALUE klass, ID id, VALUE val, const char *dest)
|
|||
rb_check_frozen(klass);
|
||||
}
|
||||
|
||||
static VALUE
|
||||
build_const_path(VALUE head, ID tail)
|
||||
{
|
||||
VALUE path = rb_str_dup(head);
|
||||
rb_str_cat2(path, "::");
|
||||
rb_str_append(path, rb_id2str(tail));
|
||||
OBJ_FREEZE(path);
|
||||
return path;
|
||||
}
|
||||
|
||||
static void finalize_classpath_for_children(VALUE named_namespace);
|
||||
|
||||
static enum rb_id_table_iterator_result
|
||||
finalize_classpath_i(ID id, VALUE v, void *payload)
|
||||
{
|
||||
rb_const_entry_t *ce = (rb_const_entry_t *)v;
|
||||
VALUE value = ce->value;
|
||||
int has_permanent_classpath;
|
||||
VALUE parental_path = *((VALUE *) payload);
|
||||
if (!rb_is_const_id(id)) {
|
||||
return ID_TABLE_CONTINUE;
|
||||
}
|
||||
if (!rb_namespace_p(value)) {
|
||||
return ID_TABLE_CONTINUE;
|
||||
}
|
||||
classname(value, &has_permanent_classpath);
|
||||
if (has_permanent_classpath) {
|
||||
return ID_TABLE_CONTINUE;
|
||||
}
|
||||
rb_ivar_set(value, classpath, build_const_path(parental_path, id));
|
||||
if (RCLASS_IV_TBL(value)) {
|
||||
st_data_t tmp = tmp_classpath;
|
||||
st_delete(RCLASS_IV_TBL(value), &tmp, 0);
|
||||
}
|
||||
finalize_classpath_for_children(value);
|
||||
|
||||
return ID_TABLE_CONTINUE;
|
||||
}
|
||||
|
||||
/*
|
||||
* Assign permanent classpaths to all namespaces that are directly or indirectly
|
||||
* nested under +named_namespace+. +named_namespace+ must have a permanent
|
||||
* classpath.
|
||||
*/
|
||||
static void
|
||||
finalize_classpath_for_children(VALUE named_namespace)
|
||||
{
|
||||
struct rb_id_table *const_table = RCLASS_CONST_TBL(named_namespace);
|
||||
|
||||
if (const_table) {
|
||||
int permanent;
|
||||
VALUE parental_path = classname(named_namespace, &permanent);
|
||||
VM_ASSERT(RB_TYPE_P(parental_path, T_STRING));
|
||||
VM_ASSERT(permanent);
|
||||
rb_id_table_foreach(const_table, finalize_classpath_i, &parental_path);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
rb_const_set(VALUE klass, ID id, VALUE val)
|
||||
{
|
||||
|
|
@ -2885,24 +2772,23 @@ rb_const_set(VALUE klass, ID id, VALUE val)
|
|||
* and avoid order-dependency on const_tbl
|
||||
*/
|
||||
if (rb_cObject && rb_namespace_p(val)) {
|
||||
if (NIL_P(rb_class_path_cached(val))) {
|
||||
int val_path_permanent;
|
||||
VALUE val_path = classname(val, &val_path_permanent);
|
||||
if (NIL_P(val_path) || !val_path_permanent) {
|
||||
if (klass == rb_cObject) {
|
||||
rb_ivar_set(val, classpath, rb_id2str(id));
|
||||
rb_name_class(val, id);
|
||||
finalize_classpath_for_children(val);
|
||||
}
|
||||
else {
|
||||
VALUE path;
|
||||
ID pathid;
|
||||
st_data_t n;
|
||||
st_table *ivtbl = RCLASS_IV_TBL(klass);
|
||||
if (ivtbl &&
|
||||
(st_lookup(ivtbl, (st_data_t)(pathid = classpath), &n) ||
|
||||
st_lookup(ivtbl, (st_data_t)(pathid = tmp_classpath), &n))) {
|
||||
path = rb_str_dup((VALUE)n);
|
||||
rb_str_append(rb_str_cat2(path, "::"), rb_id2str(id));
|
||||
OBJ_FREEZE(path);
|
||||
rb_ivar_set(val, pathid, path);
|
||||
rb_name_class(val, id);
|
||||
int parental_path_permanent;
|
||||
VALUE parental_path = classname(klass, &parental_path_permanent);
|
||||
if (!NIL_P(parental_path)) {
|
||||
if (parental_path_permanent && !val_path_permanent) {
|
||||
rb_ivar_set(val, classpath, build_const_path(parental_path, id));
|
||||
finalize_classpath_for_children(val);
|
||||
} else if (!parental_path_permanent && NIL_P(val_path)) {
|
||||
rb_ivar_set(val, tmp_classpath, build_const_path(parental_path, id));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
4
vm.c
4
vm.c
|
|
@ -374,8 +374,6 @@ rb_vm_inc_const_missing_count(void)
|
|||
ruby_vm_const_missing_count +=1;
|
||||
}
|
||||
|
||||
VALUE rb_class_path_no_cache(VALUE _klass);
|
||||
|
||||
MJIT_FUNC_EXPORTED int
|
||||
rb_dtrace_setup(rb_execution_context_t *ec, VALUE klass, ID id,
|
||||
struct ruby_dtrace_method_hook_args *args)
|
||||
|
|
@ -395,7 +393,7 @@ rb_dtrace_setup(rb_execution_context_t *ec, VALUE klass, ID id,
|
|||
}
|
||||
type = BUILTIN_TYPE(klass);
|
||||
if (type == T_CLASS || type == T_ICLASS || type == T_MODULE) {
|
||||
VALUE name = rb_class_path_no_cache(klass);
|
||||
VALUE name = rb_class_path(klass);
|
||||
const char *classname, *filename;
|
||||
const char *methodname = rb_id2name(id);
|
||||
if (methodname && (filename = rb_source_location_cstr(&args->line_no)) != 0) {
|
||||
|
|
|
|||
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Ссылка в новой задаче