Remove len(), cap() and replace with selectors; fix defer in match

src/checker/checker.cpp

@@ -124,7 +124,6 @@ enum BuiltinProcId {
 
 	BuiltinProc_new,
 	BuiltinProc_new_slice,
-	BuiltinProc_delete,
 
 	BuiltinProc_size_of,
 	BuiltinProc_size_of_val,
@@ -139,8 +138,6 @@ enum BuiltinProcId {
 	BuiltinProc_compile_assert,
 	BuiltinProc_assert,
 
-	BuiltinProc_len,
-	BuiltinProc_cap,
 	BuiltinProc_copy,
 	BuiltinProc_append,
 
@@ -168,7 +165,6 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_Count] = {
 
 	{STR_LIT("new"),              1, false, Expr_Expr},
 	{STR_LIT("new_slice"),        2, true,  Expr_Expr},
-	{STR_LIT("delete"),           1, false, Expr_Stmt},
 
 	{STR_LIT("size_of"),          1, false, Expr_Expr},
 	{STR_LIT("size_of_val"),      1, false, Expr_Expr},
@@ -183,8 +179,6 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_Count] = {
 	{STR_LIT("compile_assert"),   1, false, Expr_Stmt},
 	{STR_LIT("assert"),           1, false, Expr_Stmt},
 
-	{STR_LIT("len"),              1, false, Expr_Expr},
-	{STR_LIT("cap"),              1, false, Expr_Expr},
 	{STR_LIT("copy"),             2, false, Expr_Expr},
 	{STR_LIT("append"),           2, false, Expr_Expr},
 

src/checker/expr.cpp

@@ -2095,21 +2095,6 @@ b32 check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id)
 		operand->mode = Addressing_Value;
 		operand->type = make_type_slice(c->allocator, type);
 	} break;
-	case BuiltinProc_delete: {
-		// delete :: proc(ptr: ^T)
-		Type *type = get_base_type(operand->type);
-		if (!is_type_pointer(type) && !is_type_slice(type)) {
-			gbString type_str = type_to_string(operand->type);
-			defer (gb_string_free(type_str));
-			error(&c->error_collector, ast_node_token(call),
-			      "Expected a pointer or slice to `delete`, got `%s`",
-			      type_str);
-			return false;
-		}
-
-		operand->mode = Addressing_NoValue;
-		operand->type = NULL;
-	} break;
 
 	case BuiltinProc_size_of: {
 		// size_of :: proc(Type) -> int
@@ -2289,58 +2274,6 @@ b32 check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id)
 		}
 		break;
 
-	// TODO(bill): Should these be procedures and are their names appropriate?
-	case BuiltinProc_len:
-	case BuiltinProc_cap: {
-		Type *t = get_base_type(operand->type);
-
-		AddressingMode mode = Addressing_Invalid;
-		ExactValue value = {};
-
-		switch (t->kind) {
-		case Type_Basic:
-			if (id == BuiltinProc_len) {
-				if (is_type_string(t)) {
-					if (operand->mode == Addressing_Constant) {
-						mode = Addressing_Constant;
-						value = make_exact_value_integer(operand->value.value_string);
-					} else {
-						mode = Addressing_Value;
-					}
-				}
-			}
-			break;
-
-		case Type_Array:
-			mode = Addressing_Constant;
-			value = make_exact_value_integer(t->Array.count);
-			break;
-
-		case Type_Vector:
-			mode = Addressing_Constant;
-			value = make_exact_value_integer(t->Vector.count);
-			break;
-
-		case Type_Slice:
-			mode = Addressing_Value;
-			break;
-		}
-
-		if (mode == Addressing_Invalid) {
-			gbString str = expr_to_string(operand->expr);
-			error(&c->error_collector, ast_node_token(operand->expr),
-			      "Invalid expression `%s` for `%.*s`",
-			      str, LIT(bp->name));
-			gb_string_free(str);
-			return false;
-		}
-
-		operand->mode = mode;
-		operand->type = t_int;
-		operand->value = value;
-
-	} break;
-
 	case BuiltinProc_copy: {
 		// copy :: proc(x, y: []Type) -> int
 		Type *dest_type = NULL, *src_type = NULL;

src/checker/type.cpp

@@ -350,6 +350,7 @@ gb_global Type *t_untyped_rune    = &basic_types[Basic_UntypedRune];
 gb_global Type *t_byte            = &basic_type_aliases[Basic_byte];
 gb_global Type *t_rune            = &basic_type_aliases[Basic_rune];
 
+
 gb_global Type *t_type_info            = NULL;
 gb_global Type *t_type_info_ptr        = NULL;
 gb_global Type *t_type_info_member     = NULL;
@@ -588,7 +589,9 @@ b32 are_types_identical(Type *x, Type *y) {
 				case TypeRecord_Struct:
 				case TypeRecord_RawUnion:
 				case TypeRecord_Union:
-					if (x->Record.field_count == y->Record.field_count) {
+					if (x->Record.field_count == y->Record.field_count &&
+					    x->Record.struct_is_packed == y->Record.struct_is_packed &&
+					    x->Record.struct_is_ordered == y->Record.struct_is_ordered) {
 						for (isize i = 0; i < x->Record.field_count; i++) {
 							if (!are_types_identical(x->Record.fields[i]->type, y->Record.fields[i]->type)) {
 								return false;
@@ -709,6 +712,8 @@ void selection_add_index(Selection *s, isize index) {
 
 gb_global Entity *entity__any_type_info = NULL;
 gb_global Entity *entity__any_data      = NULL;
+gb_global Entity *entity__string_data   = NULL;
+gb_global Entity *entity__string_count = NULL;
 
 Selection lookup_field(Type *type_, String field_name, b32 is_type, Selection sel = empty_selection) {
 	GB_ASSERT(type_ != NULL);
@@ -717,6 +722,7 @@ Selection lookup_field(Type *type_, String field_name, b32 is_type, Selection se
 		return empty_selection;
 	}
 
+	gbAllocator a = gb_heap_allocator();
 	Type *type = type_deref(type_);
 	b32 is_ptr = type != type_;
 	type = get_base_type(type);
@@ -729,12 +735,12 @@ Selection lookup_field(Type *type_, String field_name, b32 is_type, Selection se
 			if (entity__any_type_info == NULL) {
 				Token token = {Token_Identifier};
 				token.string = type_info_str;
-				entity__any_type_info = make_entity_field(gb_heap_allocator(), NULL, token, t_type_info_ptr, false, 0);
+				entity__any_type_info = make_entity_field(a, NULL, token, t_type_info_ptr, false, 0);
 			}
 			if (entity__any_data == NULL) {
 				Token token = {Token_Identifier};
 				token.string = data_str;
-				entity__any_data = make_entity_field(gb_heap_allocator(), NULL, token, t_rawptr, false, 1);
+				entity__any_data = make_entity_field(a, NULL, token, t_rawptr, false, 1);
 			}
 
 			if (are_strings_equal(field_name, type_info_str)) {
@@ -747,9 +753,81 @@ Selection lookup_field(Type *type_, String field_name, b32 is_type, Selection se
 				return sel;
 			}
 		} break;
+		case Basic_string: {
+			String data_str = make_string("data");
+			String count_str = make_string("count");
+			if (entity__string_data == NULL) {
+				Token token = {Token_Identifier};
+				token.string = data_str;
+				entity__string_data = make_entity_field(a, NULL, token, make_type_pointer(a, t_byte), false, 0);
+			}
+
+			if (entity__string_count == NULL) {
+				Token token = {Token_Identifier};
+				token.string = count_str;
+				entity__string_count = make_entity_field(a, NULL, token, t_int, false, 1);
+			}
+
+			if (are_strings_equal(field_name, data_str)) {
+				selection_add_index(&sel, 0);
+				sel.entity = entity__string_data;
+				return sel;
+			} else if (are_strings_equal(field_name, count_str)) {
+				selection_add_index(&sel, 1);
+				sel.entity = entity__string_count;
+				return sel;
+			}
+		} break;
 		}
 
 		return sel;
+	} else if (type->kind == Type_Array) {
+		String count_str = make_string("count");
+		// NOTE(bill):U nderlying memory address cannot be changed
+		if (are_strings_equal(field_name, count_str)) {
+			Token token = {Token_Identifier};
+			token.string = count_str;
+			// HACK(bill): Memory leak
+			sel.entity = make_entity_constant(a, NULL, token, t_int, make_exact_value_integer(type->Array.count));
+			return sel;
+		}
+	} else if (type->kind == Type_Vector) {
+		String count_str = make_string("count");
+		// NOTE(bill): Vectors are not addressable
+		if (are_strings_equal(field_name, count_str)) {
+			Token token = {Token_Identifier};
+			token.string = count_str;
+			// HACK(bill): Memory leak
+			sel.entity = make_entity_constant(a, NULL, token, t_int, make_exact_value_integer(type->Vector.count));
+			return sel;
+		}
+	} else if (type->kind == Type_Slice) {
+		String data_str     = make_string("data");
+		String count_str    = make_string("count");
+		String capacity_str = make_string("capacity");
+
+		if (are_strings_equal(field_name, data_str)) {
+			selection_add_index(&sel, 0);
+			Token token = {Token_Identifier};
+			token.string = data_str;
+			// HACK(bill): Memory leak
+			sel.entity = make_entity_field(a, NULL, token, make_type_pointer(a, type->Slice.elem), false, 0);
+			return sel;
+		} else if (are_strings_equal(field_name, count_str)) {
+			selection_add_index(&sel, 1);
+			Token token = {Token_Identifier};
+			token.string = count_str;
+			// HACK(bill): Memory leak
+			sel.entity = make_entity_field(a, NULL, token, t_int, false, 1);
+			return sel;
+		} else if (are_strings_equal(field_name, capacity_str)) {
+			selection_add_index(&sel, 2);
+			Token token = {Token_Identifier};
+			token.string = capacity_str;
+			// HACK(bill): Memory leak
+			sel.entity = make_entity_field(a, NULL, token, t_int, false, 2);
+			return sel;
+		}
 	}
 
 	if (type->kind != Type_Record) {

src/codegen/codegen.cpp

@@ -330,6 +330,13 @@ void ssa_gen_tree(ssaGen *s) {
 					case TypeRecord_Struct: {
 						tag = ssa_add_local_generated(proc, t_type_info_struct);
 
+						{
+							ssaValue *packed  = ssa_make_const_bool(a, t->Record.struct_is_packed);
+							ssaValue *ordered = ssa_make_const_bool(a, t->Record.struct_is_ordered);
+							ssa_emit_store(proc, ssa_emit_struct_gep(proc, tag, v_one32, t_bool_ptr), packed);
+							ssa_emit_store(proc, ssa_emit_struct_gep(proc, tag, v_two32, t_bool_ptr), ordered);
+						}
+
 						ssaValue *memory = type_info_member_offset(proc, type_info_member_data, t->Record.field_count, &type_info_member_index);
 
 						type_set_offsets(m->sizes, a, t); // NOTE(bill): Just incase the offsets have not been set yet
@@ -456,9 +463,12 @@ void ssa_gen_tree(ssaGen *s) {
 					ssaValue *results  = ssa_emit_struct_gep(proc, tag, v_one32,  t_type_info_ptr_ptr);
 					ssaValue *variadic = ssa_emit_struct_gep(proc, tag, v_two32,  t_bool_ptr);
 
-
-					ssa_emit_store(proc, params,   get_type_info_ptr(proc, type_info_data, t->Proc.params));
-					ssa_emit_store(proc, results,  get_type_info_ptr(proc, type_info_data, t->Proc.results));
+					if (t->Proc.params) {
+						ssa_emit_store(proc, params,   get_type_info_ptr(proc, type_info_data, t->Proc.params));
+					}
+					if (t->Proc.results) {
+						ssa_emit_store(proc, results,  get_type_info_ptr(proc, type_info_data, t->Proc.results));
+					}
 					ssa_emit_store(proc, variadic, ssa_make_const_bool(a, t->Proc.variadic));
 
 					// TODO(bill): Type_Info for procedures

src/codegen/print_llvm.cpp

@@ -121,7 +121,7 @@ void ssa_print_encoded_local(ssaFileBuffer *f, String name) {
 
 void ssa_print_encoded_global(ssaFileBuffer *f, String name, b32 global_scope = false) {
 	ssa_fprintf(f, "@");
-	if (!global_scope) {
+	if (!global_scope && !are_strings_equal(name, make_string("main"))) {
 		ssa_fprintf(f, ".");
 	}
 	ssa_print_escape_string(f, name, true);

src/codegen/ssa.cpp

@@ -1116,10 +1116,16 @@ ssaValue *ssa_emit_deep_field_gep(ssaProcedure *proc, Type *type, ssaValue *e, S
 				e = ssa_emit_struct_gep(proc, e, index, make_type_pointer(proc->module->allocator, type));
 			} break;
 
+			case Basic_string:
+				e = ssa_emit_struct_gep(proc, e, index, make_type_pointer(proc->module->allocator, sel.entity->type));
+				break;
+
 			default:
 				GB_PANIC("un-gep-able type");
 				break;
 			}
+		} else if (type->kind == Type_Slice) {
+			e = ssa_emit_struct_gep(proc, e, index, make_type_pointer(proc->module->allocator, sel.entity->type));
 		} else {
 			GB_PANIC("un-gep-able type");
 		}
@@ -1159,10 +1165,16 @@ ssaValue *ssa_emit_deep_field_ev(ssaProcedure *proc, Type *type, ssaValue *e, Se
 				e = ssa_emit_struct_ev(proc, e, index, type);
 			} break;
 
+			case Basic_string:
+				e = ssa_emit_struct_ev(proc, e, index, sel.entity->type);
+				break;
+
 			default:
 				GB_PANIC("un-ev-able type");
 				break;
 			}
+		} else if (type->kind == Type_Slice) {
+			e = ssa_emit_struct_gep(proc, e, index, make_type_pointer(proc->module->allocator, sel.entity->type));
 		} else {
 			GB_PANIC("un-ev-able type");
 		}
@@ -1194,6 +1206,9 @@ isize ssa_type_info_index(CheckerInfo *info, Type *type) {
 			}
 		}
 	}
+	if (entry_index < 0) {
+		gb_printf_err("%s\n", type_to_string(type));
+	}
 	GB_ASSERT(entry_index >= 0);
 	return entry_index;
 }
@@ -1599,7 +1614,7 @@ ssaValue *ssa_emit_conv(ssaProcedure *proc, ssaValue *value, Type *t, b32 is_arg
 		ssaValue *result = ssa_add_local_generated(proc, t_any);
 
 		ssaValue *data = NULL;
-		if (false && value->kind == ssaValue_Instr &&
+		if (value->kind == ssaValue_Instr &&
 		    value->Instr.kind == ssaInstr_Load) {
 			// NOTE(bill): Addressable value
 			data = value->Instr.Load.address;
@@ -1704,37 +1719,16 @@ void ssa_array_bounds_check(ssaProcedure *proc, Token token, ssaValue *index, ss
 	if ((proc->module->stmt_state_flags & StmtStateFlag_no_bounds_check) != 0) {
 		return;
 	}
-	ssa_emit_comment(proc, make_string("ArrayBoundsCheck"));
-	index = ssa_emit_conv(proc, index, t_int);
-	len = ssa_emit_conv(proc, len, t_int);
-
-	Token le = {Token_LtEq};
-	Token lt = {Token_Lt};
-	Token cmp_and = {Token_And}; // NOTE(bill): Doesn't need to be logical
-	ssaValue *c0 = ssa_emit_comp(proc, le, v_zero, index);
-	ssaValue *c1 = ssa_emit_comp(proc, lt, index, len);
-	ssaValue *cond = ssa_emit_comp(proc, cmp_and, c0, c1);
-
-	ssaBlock *then = ssa_add_block(proc, NULL, make_string("abc.then"));
-	ssaBlock *done = ssa__make_block(proc, NULL, make_string("abc.done"));
-
-	ssa_emit_if(proc, cond, done, then);
-	proc->curr_block = then;
-
 
 	gbAllocator a = proc->module->allocator;
 	ssaValue **args = gb_alloc_array(a, ssaValue *, 5);
 	args[0] = ssa_emit_global_string(proc, token.pos.file);
 	args[1] = ssa_make_const_int(a, token.pos.line);
 	args[2] = ssa_make_const_int(a, token.pos.column);
-	args[3] = index;
-	args[4] = len;
+	args[3] = ssa_emit_conv(proc, index, t_int);
+	args[4] = ssa_emit_conv(proc, len, t_int);
 
 	ssa_emit_global_call(proc, "__bounds_check_error", args, 5);
-
-	ssa_emit_jump(proc, done);
-	gb_array_append(proc->blocks, done);
-	proc->curr_block = done;
 }
 
 void ssa_slice_bounds_check(ssaProcedure *proc, Token token, ssaValue *low, ssaValue *high, ssaValue *max, b32 is_substring) {
@@ -1742,43 +1736,20 @@ void ssa_slice_bounds_check(ssaProcedure *proc, Token token, ssaValue *low, ssaV
 		return;
 	}
 
-	low  = ssa_emit_conv(proc, low, t_int);
-	high = ssa_emit_conv(proc, high, t_int);
-	max  = ssa_emit_conv(proc, max, t_int);
-
-	Token le = {Token_LtEq};
-	Token cmp_and = {Token_And}; // NOTE(bill): Doesn't need to be logical
-	ssaValue *c0 = ssa_emit_comp(proc, le, v_zero, low);
-	ssaValue *c1 = ssa_emit_comp(proc, le, low, high);
-	ssaValue *c2 = ssa_emit_comp(proc, le, high, max);
-	ssaValue *cond = NULL;
-	cond = ssa_emit_comp(proc, cmp_and, c0, c1);
-	cond = ssa_emit_comp(proc, cmp_and, cond, c2);
-
-	ssaBlock *then = ssa_add_block(proc, NULL, make_string("seb.then"));
-	ssaBlock *done = ssa__make_block(proc, NULL, make_string("seb.done"));
-
-	ssa_emit_if(proc, cond, done, then);
-	proc->curr_block = then;
-
 	gbAllocator a = proc->module->allocator;
 	ssaValue **args = gb_alloc_array(a, ssaValue *, 6);
 	args[0] = ssa_emit_global_string(proc, token.pos.file);
 	args[1] = ssa_make_const_int(a, token.pos.line);
 	args[2] = ssa_make_const_int(a, token.pos.column);
-	args[3] = low;
-	args[4] = high;
-	args[5] = max;
+	args[3] = ssa_emit_conv(proc, low, t_int);
+	args[4] = ssa_emit_conv(proc, high, t_int);
+	args[5] = ssa_emit_conv(proc, max, t_int);
 
 	if (!is_substring) {
 		ssa_emit_global_call(proc, "__slice_expr_error", args, 6);
 	} else {
 		ssa_emit_global_call(proc, "__substring_expr_error", args, 5);
 	}
-
-	ssa_emit_jump(proc, done);
-	gb_array_append(proc->blocks, done);
-	proc->curr_block = done;
 }
 
 
@@ -2109,26 +2080,6 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
 					return ssa_emit_load(proc, slice);
 				} break;
 
-				case BuiltinProc_delete: {
-					ssa_emit_comment(proc, make_string("delete"));
-					// delete :: proc(ptr: ^Type)
-					// delete :: proc(slice: []Type)
-					gbAllocator allocator = proc->module->allocator;
-
-					ssaValue *value = ssa_build_expr(proc, ce->args[0]);
-
-					if (is_type_slice(ssa_type(value))) {
-						Type *etp = get_base_type(ssa_type(value));
-						etp = make_type_pointer(allocator, etp->Slice.elem);
-						value = ssa_emit(proc, ssa_make_instr_extract_value(proc, value, 0, etp));
-					}
-
-					ssaValue **args = gb_alloc_array(allocator, ssaValue *, 1);
-					args[0] = ssa_emit_conv(proc, value, t_rawptr, true);
-					return ssa_emit_global_call(proc, "dealloc", args, 1);
-				} break;
-
-
 				case BuiltinProc_assert: {
 					ssa_emit_comment(proc, make_string("assert"));
 					ssaValue *cond = ssa_build_expr(proc, ce->args[0]);
@@ -2174,25 +2125,6 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
 					return NULL;
 				} break;
 
-				case BuiltinProc_len: {
-					ssa_emit_comment(proc, make_string("len"));
-					// len :: proc(v: Type) -> int
-					// NOTE(bill): len of an array is a constant expression
-					ssaValue *v = ssa_build_expr(proc, ce->args[0]);
-					Type *t = get_base_type(ssa_type(v));
-					if (t == t_string)
-						return ssa_string_len(proc, v);
-					else if (t->kind == Type_Slice)
-						return ssa_slice_len(proc, v);
-				} break;
-				case BuiltinProc_cap: {
-					ssa_emit_comment(proc, make_string("cap"));
-					// cap :: proc(v: Type) -> int
-					// NOTE(bill): cap of an array is a constant expression
-					ssaValue *v = ssa_build_expr(proc, ce->args[0]);
-					Type *t = get_base_type(ssa_type(v));
-					return ssa_slice_cap(proc, v);
-				} break;
 				case BuiltinProc_copy: {
 					ssa_emit_comment(proc, make_string("copy"));
 					// copy :: proc(dst, src: []Type) -> int
@@ -3393,9 +3325,15 @@ void ssa_build_stmt(ssaProcedure *proc, AstNode *node) {
 				gb_array_append(proc->blocks, body);
 			}
 			proc->curr_block = body;
+
+			// TODO(bill): Handle fallthrough scope exit correctly
+			proc->scope_index++;
 			ssa_push_target_list(proc, done, NULL, fall);
 			ssa_build_stmt_list(proc, cc->stmts);
+			ssa_emit_defer_stmts(proc, ssaDefer_Default, body);
 			ssa_pop_target_list(proc);
+			proc->scope_index--;
+
 			ssa_emit_jump(proc, done);
 			proc->curr_block = next_cond;
 		}
@@ -3404,9 +3342,14 @@ void ssa_build_stmt(ssaProcedure *proc, AstNode *node) {
 			ssa_emit_jump(proc, default_block);
 			gb_array_append(proc->blocks, default_block);
 			proc->curr_block = default_block;
+
+			// TODO(bill): Handle fallthrough scope exit correctly
+			proc->scope_index++;
 			ssa_push_target_list(proc, done, NULL, default_fall);
 			ssa_build_stmt_list(proc, default_stmts);
+			ssa_emit_defer_stmts(proc, ssaDefer_Default, default_block);
 			ssa_pop_target_list(proc);
+			proc->scope_index--;
 		}
 
 		ssa_emit_jump(proc, done);
@@ -3490,9 +3433,14 @@ void ssa_build_stmt(ssaProcedure *proc, AstNode *node) {
 
 			gb_array_append(proc->blocks, body);
 			proc->curr_block = body;
+
+			proc->scope_index++;
 			ssa_push_target_list(proc, done, NULL, NULL);
 			ssa_build_stmt_list(proc, cc->stmts);
+			ssa_emit_defer_stmts(proc, ssaDefer_Default, body);
 			ssa_pop_target_list(proc);
+			proc->scope_index--;
+
 			ssa_emit_jump(proc, done);
 			proc->curr_block = next_cond;
 		}
@@ -3501,9 +3449,13 @@ void ssa_build_stmt(ssaProcedure *proc, AstNode *node) {
 			ssa_emit_jump(proc, default_block);
 			gb_array_append(proc->blocks, default_block);
 			proc->curr_block = default_block;
+
+			proc->scope_index++;
 			ssa_push_target_list(proc, done, NULL, NULL);
 			ssa_build_stmt_list(proc, default_stmts);
+			ssa_emit_defer_stmts(proc, ssaDefer_Default, default_block);
 			ssa_pop_target_list(proc);
+			proc->scope_index--;
 		}
 
 		ssa_emit_jump(proc, done);
@@ -3513,24 +3465,18 @@ void ssa_build_stmt(ssaProcedure *proc, AstNode *node) {
 
 	case_ast_node(bs, BranchStmt, node);
 		ssaBlock *block = NULL;
+		#define branch_case(x) case GB_JOIN2(Token_, x): \
+			for (ssaTargetList *t = proc->target_list; t != NULL && block == NULL; t = t->prev) { \
+				block = GB_JOIN3(t->, x, _); \
+			} break
 		switch (bs->token.kind) {
-		case Token_break: {
-			for (ssaTargetList *t = proc->target_list; t != NULL && block == NULL; t = t->prev) {
-				block = t->break_;
-			}
-		} break;
-		case Token_continue: {
-			for (ssaTargetList *t = proc->target_list; t != NULL && block == NULL; t = t->prev) {
-				block = t->continue_;
-			}
-		} break;
-		case Token_fallthrough: {
-			for (ssaTargetList *t = proc->target_list; t != NULL && block == NULL; t = t->prev) {
-				block = t->fallthrough_;
-			}
-		} break;
+		branch_case(break);
+		branch_case(continue);
+		branch_case(fallthrough);
 		}
-		if (block != NULL && bs->token.kind != Token_fallthrough) {
+		// TODO(bill): Handle fallthrough scope exit correctly
+		// if (block != NULL && bs->token.kind != Token_fallthrough) {
+		if (block != NULL) {
 			ssa_emit_defer_stmts(proc, ssaDefer_Branch, block);
 		}
 		switch (bs->token.kind) {

src/parser.cpp

@@ -64,6 +64,7 @@ enum ProcTag {
 	ProcTag_foreign         = GB_BIT(2),
 	ProcTag_inline          = GB_BIT(3),
 	ProcTag_no_inline       = GB_BIT(4),
+	ProcTag_no_context      = GB_BIT(5),
 };
 
 enum VarDeclTag {
@@ -1173,14 +1174,16 @@ void parse_proc_tags(AstFile *f, u64 *tags, String *foreign_name) {
 
 				next_token(f);
 			}
-		} else if (are_strings_equal(tag_name, make_string("inline"))) {
-			check_proc_add_tag(f, tag_expr, tags, ProcTag_inline, tag_name);
-		} else if (are_strings_equal(tag_name, make_string("no_inline"))) {
-			check_proc_add_tag(f, tag_expr, tags, ProcTag_no_inline, tag_name);
 		} else if (are_strings_equal(tag_name, make_string("bounds_check"))) {
 			check_proc_add_tag(f, tag_expr, tags, ProcTag_bounds_check, tag_name);
 		} else if (are_strings_equal(tag_name, make_string("no_bounds_check"))) {
 			check_proc_add_tag(f, tag_expr, tags, ProcTag_no_bounds_check, tag_name);
+		} else if (are_strings_equal(tag_name, make_string("inline"))) {
+			check_proc_add_tag(f, tag_expr, tags, ProcTag_inline, tag_name);
+		} else if (are_strings_equal(tag_name, make_string("no_inline"))) {
+			check_proc_add_tag(f, tag_expr, tags, ProcTag_no_inline, tag_name);
+		} else if (are_strings_equal(tag_name, make_string("no_context"))) {
+			check_proc_add_tag(f, tag_expr, tags, ProcTag_no_context, tag_name);
 		} else {
 			ast_file_err(f, ast_node_token(tag_expr), "Unknown procedure tag");
 		}
@@ -1490,17 +1493,16 @@ AstNode *parse_binary_expr(AstFile *f, b32 lhs, i32 prec_in) {
 			}
 
 			switch (op.kind) {
-			// case Token_DoublePrime: {
-			// 	AstNode *proc = parse_identifier(f);
-			// 	AstNode *right = parse_binary_expr(f, false, prec+1);
-			// 	expression->next = right;
-			// 	gbArray(AstNode *) args;
-			// 	gb_array_init_reserve(args, gb_arena_allocator(&f->arena), 2);
-			// 	gb_array_append(args, expression);
-			// 	gb_array_append(args, right);
-			// 	expression = make_call_expr(f, proc, args, op, ast_node_token(right), empty_token);
-			// 	continue;
-			// } break;
+			case Token_DoublePrime: {
+				AstNode *proc = parse_identifier(f);
+				AstNode *right = parse_binary_expr(f, false, prec+1);
+				gbArray(AstNode *) args;
+				gb_array_init_reserve(args, gb_arena_allocator(&f->arena), 2);
+				gb_array_append(args, expression);
+				gb_array_append(args, right);
+				expression = make_call_expr(f, proc, args, op, ast_node_token(right), empty_token);
+				continue;
+			} break;
 
 			case Token_as:
 			case Token_transmute:
@@ -2074,6 +2076,18 @@ AstNode *parse_decl(AstFile *f, AstNodeArray names) {
 	AstNodeArray values = NULL;
 	AstNode *type = NULL;
 
+	gb_for_array(i, names) {
+		AstNode *name = names[i];
+		if (name->kind == AstNode_Ident) {
+			String n = name->Ident.string;
+			// NOTE(bill): Check for reserved identifiers
+			if (are_strings_equal(n, make_string("context"))) {
+				ast_file_err(f, ast_node_token(name), "`context` is a reserved identifier");
+				break;
+			}
+		}
+	}
+
 	if (allow_token(f, Token_Colon)) {
 		if (!allow_token(f, Token_type)) {
 			type = parse_identifier_or_type(f);
@@ -2449,6 +2463,7 @@ AstNode *parse_stmt(AstFile *f) {
 	case Token_Rune:
 	case Token_String:
 	case Token_OpenParen:
+	case Token_proc:
 	// Unary Operators
 	case Token_Add:
 	case Token_Sub: