Merge branch 'master' into tilde

.gitignore

@@ -270,6 +270,7 @@ bin/
 
 # - Linux/MacOS
 odin
+!odin/
 odin.dSYM
 *.bin
 demo.bin
@@ -286,4 +287,4 @@ shared/
 *.sublime-workspace
 examples/bug/
 build.sh
-!core/debug/
+!core/debug/

core/mem/virtual/arena.odin

@@ -242,7 +242,7 @@ arena_growing_bootstrap_new_by_name :: proc($T: typeid, $field_name: string, min
 	return arena_growing_bootstrap_new_by_offset(T, offset_of_by_string(T, field_name), minimum_block_size)
 }
 
-// Ability to bootstrap allocate a struct with an arena within the struct itself using the growing variant strategy.
+// Ability to bootstrap allocate a struct with an arena within the struct itself using the static variant strategy.
 @(require_results)
 arena_static_bootstrap_new_by_offset :: proc($T: typeid, offset_to_arena: uintptr, reserved: uint) -> (ptr: ^T, err: Allocator_Error) {
 	bootstrap: Arena
@@ -258,7 +258,7 @@ arena_static_bootstrap_new_by_offset :: proc($T: typeid, offset_to_arena: uintpt
 	return
 }
 
-// Ability to bootstrap allocate a struct with an arena within the struct itself using the growing variant strategy.
+// Ability to bootstrap allocate a struct with an arena within the struct itself using the static variant strategy.
 @(require_results)
 arena_static_bootstrap_new_by_name :: proc($T: typeid, $field_name: string, reserved: uint) -> (ptr: ^T, err: Allocator_Error) {
 	return arena_static_bootstrap_new_by_offset(T, offset_of_by_string(T, field_name), reserved)
@@ -271,7 +271,7 @@ arena_allocator :: proc(arena: ^Arena) -> mem.Allocator {
 	return mem.Allocator{arena_allocator_proc, arena}
 }
 
-// The allocator procedured by an `Allocator` produced by `arena_allocator`
+// The allocator procedure used by an `Allocator` produced by `arena_allocator`
 arena_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
                              size, alignment: int,
                              old_memory: rawptr, old_size: int,
@@ -328,7 +328,7 @@ arena_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
 
 
 
-// An `Arena_Temp` is a way to produce temporary watermarks to reset a arena to a previous state.
+// An `Arena_Temp` is a way to produce temporary watermarks to reset an arena to a previous state.
 // All uses of an `Arena_Temp` must be handled by ending them with `arena_temp_end` or ignoring them with `arena_temp_ignore`.
 Arena_Temp :: struct {
 	arena: ^Arena,

core/sync/primitives.odin

@@ -7,10 +7,21 @@ current_thread_id :: proc "contextless" () -> int {
 	return _current_thread_id()
 }
 
-// A Mutex is a mutual exclusion lock
-// The zero value for a Mutex is an unlocked mutex
+// A Mutex is a [[mutual exclusion lock; https://en.wikipedia.org/wiki/Mutual_exclusion]]
+// It can be used to prevent more than one thread from executing the same piece of code,
+// and thus prevent access to same piece of memory by multiple threads, at the same time.
 //
-// A Mutex must not be copied after first use
+// A Mutex's zero value represents an initial, *unlocked* state.
+//
+// If another thread tries to take the lock while another thread holds it, it will pause
+// until the lock is released. Code or memory that is "surrounded" by a mutex lock is said
+// to be "guarded by a mutex".
+//
+// A Mutex must not be copied after first use (e.g., after locking it the first time).
+// This is because, in order to coordinate with other threads, all threads must watch
+// the same memory address to know when the lock has been released. Trying to use a
+// copy of the lock at a different memory address will result in broken and unsafe
+// behavior. For this reason, Mutexes are marked as `#no_copy`.
 Mutex :: struct #no_copy {
 	impl: _Mutex,
 }

core/sys/windows/kernel32.odin

@@ -159,6 +159,11 @@ foreign kernel32 {
 	WaitForSingleObject :: proc(hHandle: HANDLE, dwMilliseconds: DWORD) -> DWORD ---
 	Sleep :: proc(dwMilliseconds: DWORD) ---
 	GetProcessId :: proc(handle: HANDLE) -> DWORD ---
+	CopyFileW :: proc(
+		lpExistingFileName: LPCWSTR,
+		lpNewFileName: LPCWSTR,
+		bFailIfExists: BOOL,
+	) -> BOOL ---
 	CopyFileExW :: proc(
 		lpExistingFileName: LPCWSTR,
 		lpNewFileName: LPCWSTR,

core/sys/windows/ws2_32.odin

@@ -206,4 +206,14 @@ foreign ws2_32 {
 		optval: ^c_char,
 		optlen: ^c_int,
 	) -> c_int ---
+	// [MS-Docs](https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-ntohl)
+	ntohl :: proc(netlong: c_ulong) -> c_ulong ---
+	// [MS-Docs](https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-ntohs)
+	ntohs :: proc(netshort: c_ushort) -> c_ushort ---
+	// [MS-Docs](https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-htonl)
+	@(deprecated="Use endian specific integers instead, https://odin-lang.org/docs/overview/#basic-types")
+	htonl :: proc(hostlong: c_ulong) -> c_ulong ---
+	// [MS-Docs](https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-htons)
+	@(deprecated="Use endian specific integers instead, https://odin-lang.org/docs/overview/#basic-types")
+	htons :: proc(hostshort: c_ushort) -> c_ushort ---
 }

core/testing/testing.odin

@@ -4,6 +4,9 @@ import "core:fmt"
 import "core:io"
 import "core:time"
 import "core:intrinsics"
+import "core:reflect"
+
+_ :: reflect // alias reflect to nothing to force visibility for -vet
 
 // IMPORTANT NOTE: Compiler requires this layout
 Test_Signature :: proc(^T)
@@ -89,7 +92,7 @@ expect :: proc(t: ^T, ok: bool, msg: string = "", loc := #caller_location) -> bo
 	return ok
 }
 expect_value :: proc(t: ^T, value, expected: $T, loc := #caller_location) -> bool where intrinsics.type_is_comparable(T) {
-	ok := value == expected
+	ok := value == expected || reflect.is_nil(value) && reflect.is_nil(expected)
 	if !ok {
 		errorf(t, "expected %v, got %v", expected, value, loc=loc)
 	}
@@ -100,4 +103,4 @@ expect_value :: proc(t: ^T, value, expected: $T, loc := #caller_location) -> boo
 
 set_fail_timeout :: proc(t: ^T, duration: time.Duration, loc := #caller_location) {
 	_fail_timeout(t, duration, loc)
-}
+}

src/check_decl.cpp

@@ -757,6 +757,66 @@ gb_internal String handle_link_name(CheckerContext *ctx, Token token, String lin
 	return link_name;
 }
 
+gb_internal void check_objc_methods(CheckerContext *ctx, Entity *e, AttributeContext const &ac) {
+	if (!(ac.objc_name.len || ac.objc_is_class_method || ac.objc_type)) {
+		return;
+	}
+	if (ac.objc_name.len == 0 && ac.objc_is_class_method) {
+		error(e->token, "@(objc_name) is required with @(objc_is_class_method)");
+	} else if (ac.objc_type == nullptr) {
+		error(e->token, "@(objc_name) requires that @(objc_type) to be set");
+	} else if (ac.objc_name.len == 0 && ac.objc_type) {
+		error(e->token, "@(objc_name) is required with @(objc_type)");
+	} else {
+		Type *t = ac.objc_type;
+		if (t->kind == Type_Named) {
+			Entity *tn = t->Named.type_name;
+
+			GB_ASSERT(tn->kind == Entity_TypeName);
+
+			if (tn->scope != e->scope) {
+				error(e->token, "@(objc_name) attribute may only be applied to procedures and types within the same scope");
+			} else {
+				mutex_lock(&global_type_name_objc_metadata_mutex);
+				defer (mutex_unlock(&global_type_name_objc_metadata_mutex));
+
+				if (!tn->TypeName.objc_metadata) {
+					tn->TypeName.objc_metadata = create_type_name_obj_c_metadata();
+				}
+				auto *md = tn->TypeName.objc_metadata;
+				mutex_lock(md->mutex);
+				defer (mutex_unlock(md->mutex));
+
+				if (!ac.objc_is_class_method) {
+					bool ok = true;
+					for (TypeNameObjCMetadataEntry const &entry : md->value_entries) {
+						if (entry.name == ac.objc_name) {
+							error(e->token, "Previous declaration of @(objc_name=\"%.*s\")", LIT(ac.objc_name));
+							ok = false;
+							break;
+						}
+					}
+					if (ok) {
+						array_add(&md->value_entries, TypeNameObjCMetadataEntry{ac.objc_name, e});
+					}
+				} else {
+					bool ok = true;
+					for (TypeNameObjCMetadataEntry const &entry : md->type_entries) {
+						if (entry.name == ac.objc_name) {
+							error(e->token, "Previous declaration of @(objc_name=\"%.*s\")", LIT(ac.objc_name));
+							ok = false;
+							break;
+						}
+					}
+					if (ok) {
+						array_add(&md->type_entries, TypeNameObjCMetadataEntry{ac.objc_name, e});
+					}
+				}
+			}
+		}
+	}
+}
+
 gb_internal void check_proc_decl(CheckerContext *ctx, Entity *e, DeclInfo *d) {
 	GB_ASSERT(e->type == nullptr);
 	if (d->proc_lit->kind != Ast_ProcLit) {
@@ -840,62 +900,7 @@ gb_internal void check_proc_decl(CheckerContext *ctx, Entity *e, DeclInfo *d) {
 	}
 	e->Procedure.optimization_mode = cast(ProcedureOptimizationMode)ac.optimization_mode;
 
-	if (ac.objc_name.len || ac.objc_is_class_method || ac.objc_type) {
-		if (ac.objc_name.len == 0 && ac.objc_is_class_method) {
-			error(e->token, "@(objc_name) is required with @(objc_is_class_method)");
-		} else if (ac.objc_type == nullptr) {
-			error(e->token, "@(objc_name) requires that @(objc_type) to be set");
-		} else if (ac.objc_name.len == 0 && ac.objc_type) {
-			error(e->token, "@(objc_name) is required with @(objc_type)");
-		} else {
-			Type *t = ac.objc_type;
-			if (t->kind == Type_Named) {
-				Entity *tn = t->Named.type_name;
-
-				GB_ASSERT(tn->kind == Entity_TypeName);
-
-				if (tn->scope != e->scope) {
-					error(e->token, "@(objc_name) attribute may only be applied to procedures and types within the same scope");
-				} else {
-					mutex_lock(&global_type_name_objc_metadata_mutex);
-					defer (mutex_unlock(&global_type_name_objc_metadata_mutex));
-
-					if (!tn->TypeName.objc_metadata) {
-						tn->TypeName.objc_metadata = create_type_name_obj_c_metadata();
-					}
-					auto *md = tn->TypeName.objc_metadata;
-					mutex_lock(md->mutex);
-					defer (mutex_unlock(md->mutex));
-
-					if (!ac.objc_is_class_method) {
-						bool ok = true;
-						for (TypeNameObjCMetadataEntry const &entry : md->value_entries) {
-							if (entry.name == ac.objc_name) {
-								error(e->token, "Previous declaration of @(objc_name=\"%.*s\")", LIT(ac.objc_name));
-								ok = false;
-								break;
-							}
-						}
-						if (ok) {
-							array_add(&md->value_entries, TypeNameObjCMetadataEntry{ac.objc_name, e});
-						}
-					} else {
-						bool ok = true;
-						for (TypeNameObjCMetadataEntry const &entry : md->type_entries) {
-							if (entry.name == ac.objc_name) {
-								error(e->token, "Previous declaration of @(objc_name=\"%.*s\")", LIT(ac.objc_name));
-								ok = false;
-								break;
-							}
-						}
-						if (ok) {
-							array_add(&md->type_entries, TypeNameObjCMetadataEntry{ac.objc_name, e});
-						}
-					}
-				}
-			}
-		}
-	}
+	check_objc_methods(ctx, e, ac);
 
 	if (ac.require_target_feature.len != 0 && ac.enable_target_feature.len != 0) {
 		error(e->token, "Attributes @(require_target_feature=...) and @(enable_target_feature=...) cannot be used together");
@@ -1241,7 +1246,7 @@ gb_internal void check_global_variable_decl(CheckerContext *ctx, Entity *&e, Ast
 	check_rtti_type_disallowed(e->token, e->type, "A variable declaration is using a type, %s, which has been disallowed");
 }
 
-gb_internal void check_proc_group_decl(CheckerContext *ctx, Entity *&pg_entity, DeclInfo *d) {
+gb_internal void check_proc_group_decl(CheckerContext *ctx, Entity *pg_entity, DeclInfo *d) {
 	GB_ASSERT(pg_entity->kind == Entity_ProcGroup);
 	auto *pge = &pg_entity->ProcGroup;
 	String proc_group_name = pg_entity->token.string;
@@ -1366,6 +1371,11 @@ gb_internal void check_proc_group_decl(CheckerContext *ctx, Entity *&pg_entity,
 		}
 	}
 
+	AttributeContext ac = {};
+	check_decl_attributes(ctx, d->attributes, proc_group_attribute, &ac);
+	check_objc_methods(ctx, pg_entity, ac);
+
+
 }
 
 gb_internal void check_entity_decl(CheckerContext *ctx, Entity *e, DeclInfo *d, Type *named_type) {

src/check_expr.cpp

@@ -6136,7 +6136,6 @@ gb_internal CallArgumentData check_call_arguments_proc_group(CheckerContext *c,
 	{
 		// NOTE(bill, 2019-07-13): This code is used to improve the type inference for procedure groups
 		// where the same positional parameter has the same type value (and ellipsis)
-		bool proc_arg_count_all_equal = true;
 		isize proc_arg_count = -1;
 		for (Entity *p : procs) {
 			Type *pt = base_type(p->type);
@@ -6144,15 +6143,12 @@ gb_internal CallArgumentData check_call_arguments_proc_group(CheckerContext *c,
 				if (proc_arg_count < 0) {
 					proc_arg_count = pt->Proc.param_count;
 				} else {
-					if (proc_arg_count != pt->Proc.param_count) {
-						proc_arg_count_all_equal = false;
-						break;
-					}
+					proc_arg_count = gb_min(proc_arg_count, pt->Proc.param_count);
 				}
 			}
 		}
 
-		if (proc_arg_count >= 0 && proc_arg_count_all_equal) {
+		if (proc_arg_count >= 0) {
 			lhs_count = proc_arg_count;
 			if (lhs_count > 0)  {
 				lhs = gb_alloc_array(heap_allocator(), Entity *, lhs_count);
@@ -6258,14 +6254,18 @@ gb_internal CallArgumentData check_call_arguments_proc_group(CheckerContext *c,
 			}
 			isize index = i;
 
+			ValidIndexAndScore item = {};
+			item.score = data.score;
+
 			if (data.gen_entity != nullptr) {
 				array_add(&proc_entities, data.gen_entity);
 				index = proc_entities.count-1;
+
+				// prefer non-polymorphic procedures over polymorphic
+				item.score += assign_score_function(1);
 			}
 
-			ValidIndexAndScore item = {};
 			item.index = index;
-			item.score = data.score;
 			array_add(&valids, item);
 		}
 	}
@@ -6328,9 +6328,44 @@ gb_internal CallArgumentData check_call_arguments_proc_group(CheckerContext *c,
 			print_argument_types();
 		}
 
+		if (procs.count == 0) {
+			procs = proc_group_entities_cloned(c, *operand);
+		}
 		if (procs.count > 0) {
 			error_line("Did you mean to use one of the following:\n");
 		}
+		isize max_name_length = 0;
+		isize max_type_length = 0;
+		for (Entity *proc : procs) {
+			Type *t = base_type(proc->type);
+			if (t == t_invalid) continue;
+			String prefix = {};
+			String prefix_sep = {};
+			if (proc->pkg) {
+				prefix = proc->pkg->name;
+				prefix_sep = str_lit(".");
+			}
+			String name = proc->token.string;
+			max_name_length = gb_max(max_name_length, prefix.len + prefix_sep.len + name.len);
+
+			gbString pt;
+			if (t->Proc.node != nullptr) {
+				pt = expr_to_string(t->Proc.node);
+			} else {
+				pt = type_to_string(t);
+			}
+
+			max_type_length = gb_max(max_type_length, gb_string_length(pt));
+			gb_string_free(pt);
+		}
+
+		isize max_spaces = gb_max(max_name_length, max_type_length);
+		char *spaces = gb_alloc_array(temporary_allocator(), char, max_spaces+1);
+		for (isize i = 0; i < max_spaces; i++) {
+			spaces[i] = ' ';
+		}
+		spaces[max_spaces] = 0;
+
 		for (Entity *proc : procs) {
 			TokenPos pos = proc->token.pos;
 			Type *t = base_type(proc->type);
@@ -6350,12 +6385,23 @@ gb_internal CallArgumentData check_call_arguments_proc_group(CheckerContext *c,
 				prefix_sep = str_lit(".");
 			}
 			String name = proc->token.string;
+			isize len = prefix.len + prefix_sep.len + name.len;
+
+			int name_padding = cast(int)gb_max(max_name_length - len, 0);
+			int type_padding = cast(int)gb_max(max_type_length - gb_string_length(pt), 0);
 
 			char const *sep = "::";
 			if (proc->kind == Entity_Variable) {
 				sep = ":=";
 			}
-			error_line("\t%.*s%.*s%.*s %s %s at %s\n", LIT(prefix), LIT(prefix_sep), LIT(name), sep, pt, token_pos_to_string(pos));
+			error_line("\t%.*s%.*s%.*s %.*s%s %s %.*sat %s\n",
+			           LIT(prefix), LIT(prefix_sep), LIT(name),
+			           name_padding, spaces,
+			           sep,
+			           pt,
+			           type_padding, spaces,
+			           token_pos_to_string(pos)
+			);
 		}
 		if (procs.count > 0) {
 			error_line("\n");
@@ -6369,8 +6415,8 @@ gb_internal CallArgumentData check_call_arguments_proc_group(CheckerContext *c,
 		error(operand->expr, "Ambiguous procedure group call '%s' that match with the given arguments", expr_name);
 		print_argument_types();
 
-		for (isize i = 0; i < valids.count; i++) {
-			Entity *proc = proc_entities[valids[i].index];
+		for (auto const &valid : valids) {
+			Entity *proc = proc_entities[valid.index];
 			GB_ASSERT(proc != nullptr);
 			TokenPos pos = proc->token.pos;
 			Type *t = base_type(proc->type); GB_ASSERT(t->kind == Type_Proc);
@@ -9315,13 +9361,13 @@ gb_internal ExprKind check_selector_call_expr(CheckerContext *c, Operand *o, Ast
 	ExprKind kind = check_expr_base(c, &x, se->expr, nullptr);
 	c->allow_arrow_right_selector_expr = allow_arrow_right_selector_expr;
 
-	if (x.mode == Addressing_Invalid || x.type == t_invalid) {
+	if (x.mode == Addressing_Invalid || (x.type == t_invalid && x.mode != Addressing_ProcGroup)) {
 		o->mode = Addressing_Invalid;
 		o->type = t_invalid;
 		o->expr = node;
 		return kind;
 	}
-	if (!is_type_proc(x.type)) {
+	if (!is_type_proc(x.type) && x.mode != Addressing_ProcGroup) {
 		gbString type_str = type_to_string(x.type);
 		error(se->call, "Selector call expressions expect a procedure type for the call, got '%s'", type_str);
 		gb_string_free(type_str);
@@ -9344,76 +9390,76 @@ gb_internal ExprKind check_selector_call_expr(CheckerContext *c, Operand *o, Ast
 		first_arg->state_flags |= StateFlag_SelectorCallExpr;
 	}
 
-	Type *pt = base_type(x.type);
-	GB_ASSERT(pt->kind == Type_Proc);
-	Type *first_type = nullptr;
-	String first_arg_name = {};
-	if (pt->Proc.param_count > 0) {
-		Entity *f = pt->Proc.params->Tuple.variables[0];
-		first_type = f->type;
-		first_arg_name = f->token.string;
-	}
-	if (first_arg_name.len == 0) {
-		first_arg_name = str_lit("_");
-	}
+	if (e->kind != Entity_ProcGroup) {
+		Type *pt = base_type(x.type);
+		GB_ASSERT_MSG(pt->kind == Type_Proc, "%.*s %.*s %s", LIT(e->token.string), LIT(entity_strings[e->kind]), type_to_string(x.type));
+		Type *first_type = nullptr;
+		String first_arg_name = {};
+		if (pt->Proc.param_count > 0) {
+			Entity *f = pt->Proc.params->Tuple.variables[0];
+			first_type = f->type;
+			first_arg_name = f->token.string;
+		}
+		if (first_arg_name.len == 0) {
+			first_arg_name = str_lit("_");
+		}
 
-	if (first_type == nullptr) {
-		error(se->call, "Selector call expressions expect a procedure type for the call with at least 1 parameter");
-		o->mode = Addressing_Invalid;
-		o->type = t_invalid;
-		o->expr = node;
-		return Expr_Stmt;
-	}
+		if (first_type == nullptr) {
+			error(se->call, "Selector call expressions expect a procedure type for the call with at least 1 parameter");
+			o->mode = Addressing_Invalid;
+			o->type = t_invalid;
+			o->expr = node;
+			return Expr_Stmt;
+		}
 
-	Operand y = {};
-	y.mode = first_arg->tav.mode;
-	y.type = first_arg->tav.type;
-	y.value = first_arg->tav.value;
+		Operand y = {};
+		y.mode = first_arg->tav.mode;
+		y.type = first_arg->tav.type;
+		y.value = first_arg->tav.value;
 
-	if (check_is_assignable_to(c, &y, first_type)) {
-		// Do nothing, it's valid
-	} else {
-		Operand z = y;
-		z.type = type_deref(y.type);
-		if (check_is_assignable_to(c, &z, first_type)) {
-			// NOTE(bill): AST GENERATION HACK!
-			Token op = {Token_Pointer};
-			first_arg = ast_deref_expr(first_arg->file(), first_arg, op);
-		} else if (y.mode == Addressing_Variable) {
-			Operand w = y;
-			w.type = alloc_type_pointer(y.type);
-			if (check_is_assignable_to(c, &w, first_type)) {
+		if (check_is_assignable_to(c, &y, first_type)) {
+			// Do nothing, it's valid
+		} else {
+			Operand z = y;
+			z.type = type_deref(y.type);
+			if (check_is_assignable_to(c, &z, first_type)) {
 				// NOTE(bill): AST GENERATION HACK!
-				Token op = {Token_And};
-				first_arg = ast_unary_expr(first_arg->file(), op, first_arg);
+				Token op = {Token_Pointer};
+				first_arg = ast_deref_expr(first_arg->file(), first_arg, op);
+			} else if (y.mode == Addressing_Variable) {
+				Operand w = y;
+				w.type = alloc_type_pointer(y.type);
+				if (check_is_assignable_to(c, &w, first_type)) {
+					// NOTE(bill): AST GENERATION HACK!
+					Token op = {Token_And};
+					first_arg = ast_unary_expr(first_arg->file(), op, first_arg);
+				}
 			}
 		}
-	}
 
-	if (ce->args.count > 0) {
-		bool fail = false;
-		bool first_is_field_value = (ce->args[0]->kind == Ast_FieldValue);
-		for (Ast *arg : ce->args) {
-			bool mix = false;
-			if (first_is_field_value) {
-				mix = arg->kind != Ast_FieldValue;
-			} else {
-				mix = arg->kind == Ast_FieldValue;
+		if (ce->args.count > 0) {
+			bool fail = false;
+			bool first_is_field_value = (ce->args[0]->kind == Ast_FieldValue);
+			for (Ast *arg : ce->args) {
+				bool mix = false;
+				if (first_is_field_value) {
+					mix = arg->kind != Ast_FieldValue;
+				} else {
+					mix = arg->kind == Ast_FieldValue;
+				}
+				if (mix) {
+					fail = true;
+					break;
+				}
 			}
-			if (mix) {
-				fail = true;
-				break;
+			if (!fail && first_is_field_value) {
+				Token op = {Token_Eq};
+				AstFile *f = first_arg->file();
+				first_arg = ast_field_value(f, ast_ident(f, make_token_ident(first_arg_name)), first_arg, op);
 			}
 		}
-		if (!fail && first_is_field_value) {
-			Token op = {Token_Eq};
-			AstFile *f = first_arg->file();
-			first_arg = ast_field_value(f, ast_ident(f, make_token_ident(first_arg_name)), first_arg, op);
-		}
 	}
 
-
-
 	auto modified_args = slice_make<Ast *>(heap_allocator(), ce->args.count+1);
 	modified_args[0] = first_arg;
 	slice_copy(&modified_args, ce->args, 1);

src/checker.cpp

@@ -2935,6 +2935,54 @@ gb_internal DECL_ATTRIBUTE_PROC(foreign_block_decl_attribute) {
 	return false;
 }
 
+gb_internal DECL_ATTRIBUTE_PROC(proc_group_attribute) {
+	if (name == ATTRIBUTE_USER_TAG_NAME) {
+		ExactValue ev = check_decl_attribute_value(c, value);
+		if (ev.kind != ExactValue_String) {
+			error(elem, "Expected a string value for '%.*s'", LIT(name));
+		}
+		return true;
+	} else if (name == "objc_name") {
+		ExactValue ev = check_decl_attribute_value(c, value);
+		if (ev.kind == ExactValue_String) {
+			if (string_is_valid_identifier(ev.value_string)) {
+				ac->objc_name = ev.value_string;
+			} else {
+				error(elem, "Invalid identifier for '%.*s', got '%.*s'", LIT(name), LIT(ev.value_string));
+			}
+		} else {
+			error(elem, "Expected a string value for '%.*s'", LIT(name));
+		}
+		return true;
+	} else if (name == "objc_is_class_method") {
+		ExactValue ev = check_decl_attribute_value(c, value);
+		if (ev.kind == ExactValue_Bool) {
+			ac->objc_is_class_method = ev.value_bool;
+		} else {
+			error(elem, "Expected a boolean value for '%.*s'", LIT(name));
+		}
+		return true;
+	} else if (name == "objc_type") {
+		if (value == nullptr) {
+			error(elem, "Expected a type for '%.*s'", LIT(name));
+		} else {
+			Type *objc_type = check_type(c, value);
+			if (objc_type != nullptr) {
+				if (!has_type_got_objc_class_attribute(objc_type)) {
+					gbString t = type_to_string(objc_type);
+					error(value, "'%.*s' expected a named type with the attribute @(obj_class=<string>), got type %s", LIT(name), t);
+					gb_string_free(t);
+				} else {
+					ac->objc_type = objc_type;
+				}
+			}
+		}
+		return true;
+	}
+	return false;
+}
+
+
 gb_internal DECL_ATTRIBUTE_PROC(proc_decl_attribute) {
 	if (name == ATTRIBUTE_USER_TAG_NAME) {
 		ExactValue ev = check_decl_attribute_value(c, value);

src/llvm_backend.cpp

@@ -1825,25 +1825,28 @@ gb_internal lbProcedure *lb_create_main_procedure(lbModule *m, lbProcedure *star
 		TEMPORARY_ALLOCATOR_GUARD();
 		auto args = array_make<lbValue>(temporary_allocator(), 1);
 		args[0] = lb_addr_load(p, all_tests_slice);
-		lb_emit_call(p, runner, args);
+		lbValue result = lb_emit_call(p, runner, args);
+
+		lbValue exit_runner = lb_find_package_value(m, str_lit("os"), str_lit("exit"));
+		auto exit_args = array_make<lbValue>(temporary_allocator(), 1);
+		exit_args[0] = lb_emit_select(p, result, lb_const_int(m, t_int, 0), lb_const_int(m, t_int, 1));
+		lb_emit_call(p, exit_runner, exit_args, ProcInlining_none);
 	} else {
 		if (m->info->entry_point != nullptr) {
 			lbValue entry_point = lb_find_procedure_value_from_entity(m, m->info->entry_point);
 			lb_emit_call(p, entry_point, {}, ProcInlining_no_inline);
 		}
-	}
-
-
-	if (call_cleanup) {
-		lbValue cleanup_runtime_value = {cleanup_runtime->value, cleanup_runtime->type};
-		lb_emit_call(p, cleanup_runtime_value, {}, ProcInlining_none);
-	}
 
+		if (call_cleanup) {
+			lbValue cleanup_runtime_value = {cleanup_runtime->value, cleanup_runtime->type};
+			lb_emit_call(p, cleanup_runtime_value, {}, ProcInlining_none);
+		}
 
-	if (is_dll_main) {
-		LLVMBuildRet(p->builder, LLVMConstInt(lb_type(m, t_i32), 1, false));
-	} else {
-		LLVMBuildRet(p->builder, LLVMConstInt(lb_type(m, t_i32), 0, false));
+		if (is_dll_main) {
+			LLVMBuildRet(p->builder, LLVMConstInt(lb_type(m, t_i32), 1, false));
+		} else {
+			LLVMBuildRet(p->builder, LLVMConstInt(lb_type(m, t_i32), 0, false));
+		}
 	}
 
 	lb_end_procedure_body(p);

src/llvm_backend_expr.cpp

@@ -4171,7 +4171,7 @@ gb_internal lbAddr lb_build_addr_compound_lit(lbProcedure *p, Ast *expr) {
 
 				// HACK TODO(bill): THIS IS A MASSIVE HACK!!!!
 				if (is_type_union(ft) && !are_types_identical(fet, ft) && !is_type_untyped(fet)) {
-					GB_ASSERT_MSG(union_variant_index(ft, fet) > 0, "%s", type_to_string(fet));
+					GB_ASSERT_MSG(union_variant_index(ft, fet) >= 0, "%s", type_to_string(fet));
 
 					lb_emit_store_union_variant(p, gep, field_expr, fet);
 				} else {
@@ -4519,8 +4519,9 @@ gb_internal lbAddr lb_build_addr_internal(lbProcedure *p, Ast *expr) {
 			Selection sel = lookup_field(type, selector, false);
 			GB_ASSERT(sel.entity != nullptr);
 			if (sel.pseudo_field) {
-				GB_ASSERT(sel.entity->kind == Entity_Procedure);
+				GB_ASSERT(sel.entity->kind == Entity_Procedure || sel.entity->kind == Entity_ProcGroup);
 				Entity *e = entity_of_node(sel_node);
+				GB_ASSERT(e->kind == Entity_Procedure);
 				return lb_addr(lb_find_value_from_entity(p->module, e));
 			}
 

src/types.cpp

@@ -3081,7 +3081,7 @@ gb_internal Selection lookup_field_with_selection(Type *type_, String field_name
 				mutex_lock(md->mutex);
 				defer (mutex_unlock(md->mutex));
 				for (TypeNameObjCMetadataEntry const &entry : md->value_entries) {
-					GB_ASSERT(entry.entity->kind == Entity_Procedure);
+					GB_ASSERT(entry.entity->kind == Entity_Procedure || entry.entity->kind == Entity_ProcGroup);
 					if (entry.name == field_name) {
 						sel.entity = entry.entity;
 						sel.pseudo_field = true;

tests/issues/run.bat

@@ -14,6 +14,7 @@ set COMMON=-collection:tests=..\..
 ..\..\..\odin build ..\test_issue_2113.odin %COMMON% -file -debug || exit /b
 ..\..\..\odin test ..\test_issue_2466.odin %COMMON% -file || exit /b
 ..\..\..\odin test ..\test_issue_2615.odin %COMMON% -file || exit /b
+..\..\..\odin test ..\test_issue_2637.odin %COMMON% -file || exit /b
 
 @echo off
 

tests/issues/run.sh

@@ -17,6 +17,7 @@ $ODIN test ../test_issue_2087.odin $COMMON -file
 $ODIN build ../test_issue_2113.odin $COMMON -file -debug
 $ODIN test ../test_issue_2466.odin $COMMON -file
 $ODIN test ../test_issue_2615.odin $COMMON -file
+$ODIN test ../test_issue_2637.odin $COMMON -file
 if [[ $($ODIN build ../test_issue_2395.odin $COMMON -file 2>&1 >/dev/null | grep -c "$NO_NIL_ERR") -eq 2 ]] ; then
 	echo "SUCCESSFUL 1/1"
 else

tests/issues/test_issue_2637.odin

@@ -0,0 +1,13 @@
+// Tests issue #2637 https://github.com/odin-lang/Odin/issues/2637
+package test_issues
+
+import "core:testing"
+
+Foo :: Maybe(string)
+
+@(test)
+test_expect_value_succeeds_with_nil :: proc(t: ^testing.T) {
+  x: Foo
+  testing.expect(t, x == nil) // Succeeds
+  testing.expect_value(t, x, nil) // Fails, "expected nil, got nil"
+}

vendor/ggpo/ggpo.odin

@@ -50,7 +50,7 @@ Player :: struct {
 	player_num: c.int,
 	using u: struct #raw_union {
 		local: struct {},
-		remove: struct {
+		remote: struct {
 			ip_address: [32]byte,
 			port: u16,
 		},

vendor/raylib/raylib.odin

@@ -1133,7 +1133,7 @@ foreign lib {
 
 	SetGesturesEnabled     :: proc(flags: Gestures) ---          // Enable a set of gestures using flags
 	IsGestureDetected      :: proc(gesture: Gesture) -> bool --- // Check if a gesture have been detected
-	GetGestureDetected     :: proc() -> Gesture ---              // Get latest detected gesture
+	GetGestureDetected     :: proc() -> Gestures ---             // Get latest detected gesture
 	GetGestureHoldDuration :: proc() -> f32 ---                  // Get gesture hold time in milliseconds
 	GetGestureDragVector   :: proc() -> Vector2 ---              // Get gesture drag vector
 	GetGestureDragAngle    :: proc() -> f32 ---                  // Get gesture drag angle