Forward declared type

src/compiler.cpp

@@ -306,8 +306,11 @@ global_variable String names[] =
     string_literal("noreturn_macro"),
     string_literal("generic_pointer_array"),
     
-    string_literal("self_referential_struct"), // TODO
-    // string_literal("forward_declared_type"),
+    string_literal("self_referential_struct"),
+    string_literal("forward_declared_type"),
+
+    string_literal("enum_array"),
+    string_literal("opaque"),
 };
 
 void entry_point(Slice<const char*> arguments, Slice<char* const> environment)
@@ -488,7 +491,7 @@ void entry_point(Slice<const char*> arguments, Slice<char* const> environment)
                         auto success = execution.termination_kind == TerminationKind::exit && execution.termination_code == 0;
                         if (!success)
                         {
-                            print(string_literal("Standalone test failed: "));
+                            print(string_literal("Self-hosted test failed: "));
                             print(name);
                             print(string_literal("\n"));
                             bb_fail();

src/compiler.hpp

@@ -314,6 +314,8 @@ enum class TypeId
     unresolved,
     vector,
     floating_point,
+    enum_array,
+    opaque,
 };
 
 struct TypeInteger
@@ -448,6 +450,13 @@ struct LLVMType
     LLVMMetadataRef debug;
 };
 
+struct TypeEnumArray
+{
+    Type* enum_type;
+    Type* element_type;
+    Type* next;
+};
+
 struct Type
 {
     union
@@ -461,6 +470,7 @@ struct Type
         TypeBits bits;
         TypeAlias alias;
         TypeUnion union_type;
+        TypeEnumArray enum_array;
     };
     TypeId id;
     String name;
@@ -528,6 +538,17 @@ fn u64 get_byte_size(Type* type)
                 auto result = type->union_type.byte_size;
                 return result;
             } break;
+        case TypeId::enum_array:
+            {
+                auto enum_type = type->enum_array.enum_type;
+                assert(enum_type->id == TypeId::enumerator);
+                auto element_count = enum_type->enumerator.fields.length;
+                auto element_type = type->enum_array.element_type;
+                auto element_size = get_byte_size(element_type);
+
+                auto result = element_size * element_count;
+                return result;
+            } break;
         default: trap();
     }
 }
@@ -575,6 +596,10 @@ fn u32 get_byte_alignment(Type* type)
             {
                 return get_byte_alignment(type->alias.type);
             } break;
+        case TypeId::enum_array:
+            {
+                return get_byte_alignment(type->enum_array.element_type);
+            } break;
         default: trap();
     }
 }
@@ -987,6 +1012,7 @@ struct Value
             case ValueId::enum_literal:
             case ValueId::unary_type:
             case ValueId::string_literal:
+            case ValueId::zero:
                 return true;
             case ValueId::unary:
             case ValueId::binary:
@@ -1126,6 +1152,7 @@ struct Module
     Type* first_slice_type;
     Type* first_pair_struct_type;
     Type* first_array_type;
+    Type* first_enum_array_type;
 
     Type* first_type;
     Type* last_type;
@@ -1714,5 +1741,52 @@ fn Local* new_local(Module* module, Scope* scope)
     return result;
 }
 
+fn Type* get_enum_array_type(Module* module, Type* enum_type, Type* element_type)
+{
+    assert(enum_type);
+    assert(element_type);
+
+    Type* last_enum_type = module->first_enum_array_type;
+
+    if (last_enum_type)
+    {
+        while (1)
+        {
+            assert(last_enum_type->id == TypeId::enum_array);
+
+            if (last_enum_type->enum_array.enum_type == enum_type && last_enum_type->enum_array.element_type == element_type)
+            {
+                return last_enum_type;
+            }
+
+            if (!last_enum_type->enum_array.next)
+            {
+                break;
+            }
+
+            last_enum_type = last_enum_type->enum_array.next;
+        }
+    }
+
+    String name_parts[] = {
+        string_literal("enum_array["),
+        enum_type->name,
+        string_literal("]("),
+        element_type->name,
+        string_literal(")"),
+    };
+
+    auto enum_array_type = type_allocate_init(module, {
+        .enum_array = {
+            .enum_type = enum_type,
+            .element_type = element_type,
+        },
+        .id = TypeId::enum_array,
+        .name = arena_join_string(module->arena, array_to_slice(name_parts)),
+    });
+    return enum_array_type;
+}
+
+
 void parse(Module* module);
 void emit(Module* module);

src/parser.cpp

@@ -450,7 +450,6 @@ fn u64 parse_integer_decimal_assume_valid(String string)
 
 fn Value* parse_value(Module* module, Scope* scope, ValueBuilder builder);
 
-
 fn Type* parse_type(Module* module, Scope* scope)
 {
     auto start_character = module->content[module->offset];
@@ -465,6 +464,20 @@ fn Type* parse_type(Module* module, Scope* scope)
         {
             return noreturn_type(module);
         }
+        else if (identifier.equal(string_literal("enum_array")))
+        {
+            skip_space(module);
+            expect_character(module, left_bracket);
+            auto enum_type = parse_type(module, scope);
+            expect_character(module, right_bracket);
+
+            expect_character(module, left_parenthesis);
+            auto element_type = parse_type(module, scope);
+            expect_character(module, right_parenthesis);
+
+            auto enum_array_type = get_enum_array_type(module, enum_type, element_type);
+            return enum_array_type;
+        }
         else
         {
             auto is_int_type = identifier.length > 1 && (identifier[0] == 's' || identifier[0] == 'u');
@@ -1191,6 +1204,83 @@ fn Token tokenize(Module* module)
 
 fn Value* parse_value(Module* module, Scope* scope, ValueBuilder builder);
 
+fn Value* parse_aggregate_initialization(Module* module, Scope* scope, ValueBuilder builder, u8 end_ch)
+{
+    skip_space(module);
+
+    u64 field_count = 0;
+    String name_buffer[64];
+    Value* value_buffer[64];
+    bool zero = false;
+
+    while (1)
+    {
+        skip_space(module);
+
+        if (consume_character_if_match(module, end_ch))
+        {
+            break;
+        }
+
+        auto field_index = field_count;
+        if (consume_character_if_match(module, '.'))
+        {
+            auto name = parse_identifier(module);
+            name_buffer[field_index] = name;
+            skip_space(module);
+            expect_character(module, '=');
+            skip_space(module);
+
+            auto value = parse_value(module, scope, {});
+            value_buffer[field_index] = value;
+            skip_space(module);
+            consume_character_if_match(module, ',');
+        }
+        else
+        {
+            auto token = tokenize(module);
+            zero = token.id == TokenId::value_keyword && token.value_keyword == ValueKeyword::zero;
+            if (zero)
+            {
+                skip_space(module);
+
+                if (consume_character_if_match(module, ','))
+                {
+                    skip_space(module);
+                }
+
+                expect_character(module, right_brace);
+                break;
+            }
+            else
+            {
+                report_error();
+            }
+        }
+
+        field_count += 1;
+    }
+
+    auto names = arena_allocate<String>(module->arena, field_count);
+    memcpy(names.pointer, name_buffer, sizeof(String) * field_count);
+    auto values = new_value_array(module, field_count);
+    memcpy(values.pointer, value_buffer, sizeof(Value*) * field_count);
+
+    auto result = new_value(module);
+    *result = {
+        .aggregate_initialization = {
+            .names = names,
+            .values = values,
+            .is_constant = false,
+            .zero = zero,
+        },
+        .id = ValueId::aggregate_initialization,
+        .kind = builder.kind,
+    };
+
+    return result;
+}
+
 fn Value* parse_precedence(Module* module, Scope* scope, ValueBuilder builder);
 fn Value* parse_left(Module* module, Scope* scope, ValueBuilder builder)
 {
@@ -1422,33 +1512,42 @@ fn Value* parse_left(Module* module, Scope* scope, ValueBuilder builder)
                 u64 element_count = 0;
                 Value* value_buffer[64];
 
-                while (1)
-                {
-                    skip_space(module);
+                skip_space(module);
 
-                    if (consume_character_if_match(module, right_bracket))
+                if (module->content[module->offset] == '.')
+                {
+                    result = parse_aggregate_initialization(module, scope, builder, right_bracket);
+                }
+                else
+                {
+                    while (1)
                     {
-                        break;
+                        skip_space(module);
+
+                        if (consume_character_if_match(module, right_bracket))
+                        {
+                            break;
+                        }
+
+                        auto value = parse_value(module, scope, {});
+                        value_buffer[element_count] = value;
+                        element_count += 1;
+
+                        consume_character_if_match(module, ',');
                     }
 
-                    auto value = parse_value(module, scope, {});
-                    value_buffer[element_count] = value;
-                    element_count += 1;
+                    auto values = new_value_array(module, element_count);
+                    memcpy(values.pointer, value_buffer, element_count * sizeof(Value*));
 
-                    consume_character_if_match(module, ',');
+                    result = new_value(module);
+                    *result = {
+                        .array_initialization = {
+                            .values = values,
+                            .is_constant = false, // This is analyzed later
+                        },
+                        .id = ValueId::array_initialization,
+                    };
                 }
-
-                auto values = new_value_array(module, element_count);
-                memcpy(values.pointer, value_buffer, element_count * sizeof(Value*));
-
-                result = new_value(module);
-                *result = {
-                    .array_initialization = {
-                        .values = values,
-                        .is_constant = false, // This is analyzed later
-                    },
-                    .id = ValueId::array_initialization,
-                };
             } break;
         case TokenId::dot:
             {
@@ -1477,76 +1576,7 @@ fn Value* parse_left(Module* module, Scope* scope, ValueBuilder builder)
             } break;
         case TokenId::left_brace:
             {
-                skip_space(module);
-
-                u64 field_count = 0;
-                String name_buffer[64];
-                Value* value_buffer[64];
-                bool zero = false;
-
-                while (1)
-                {
-                    skip_space(module);
-
-                    if (consume_character_if_match(module, right_brace))
-                    {
-                        break;
-                    }
-
-                    auto field_index = field_count;
-                    if (consume_character_if_match(module, '.'))
-                    {
-                        auto name = parse_identifier(module);
-                        name_buffer[field_index] = name;
-                        skip_space(module);
-                        expect_character(module, '=');
-                        skip_space(module);
-
-                        auto value = parse_value(module, scope, {});
-                        value_buffer[field_index] = value;
-                        skip_space(module);
-                        consume_character_if_match(module, ',');
-                    }
-                    else
-                    {
-                        auto token = tokenize(module);
-                        zero = token.id == TokenId::value_keyword && token.value_keyword == ValueKeyword::zero;
-                        if (zero)
-                        {
-                            skip_space(module);
-
-                            if (consume_character_if_match(module, ','))
-                            {
-                                skip_space(module);
-                            }
-
-                            expect_character(module, right_brace);
-                            break;
-                        }
-                        else
-                        {
-                            report_error();
-                        }
-                    }
-
-                    field_count += 1;
-                }
-
-                auto names = arena_allocate<String>(module->arena, field_count);
-                memcpy(names.pointer, name_buffer, sizeof(String) * field_count);
-                auto values = new_value_array(module, field_count);
-                memcpy(values.pointer, value_buffer, sizeof(Value*) * field_count);
-
-                result = new_value(module);
-                *result = {
-                    .aggregate_initialization = {
-                        .names = names,
-                        .values = values,
-                        .is_constant = false,
-                        .zero = zero,
-                    },
-                    .id = ValueId::aggregate_initialization,
-                };
+                result = parse_aggregate_initialization(module, scope, builder, right_brace);
             } break;
         case TokenId::value_keyword:
             {
@@ -2779,6 +2809,7 @@ void parse(Module* module)
             enumerator,
             function,
             macro,
+            opaque,
             structure,
             typealias,
             union_type,
@@ -2798,6 +2829,7 @@ void parse(Module* module)
                 string_literal("enum"),
                 string_literal("fn"),
                 string_literal("macro"),
+                string_literal("opaque"),
                 string_literal("struct"),
                 string_literal("typealias"),
                 string_literal("union"),
@@ -3485,6 +3517,8 @@ void parse(Module* module)
                                 field_count += 1;
                             }
 
+                            byte_size = align_forward(byte_size, byte_alignment);
+
                             skip_space(module);
                             consume_character_if_match(module, ';');
 
@@ -3605,6 +3639,16 @@ void parse(Module* module)
                         };
                         union_type->id = TypeId::union_type;
                     } break;
+                case GlobalKeyword::opaque:
+                    {
+                        skip_space(module);
+                        expect_character(module, ';');
+                        auto opaque_type = type_allocate_init(module, {
+                            .id = TypeId::opaque,
+                            .name = global_name,
+                        });
+                        unused(opaque_type);
+                    } break;
                 case GlobalKeyword::count:
                     {
                         set_checkpoint(module, checkpoint);

tests/enum_array.bbb

@@ -0,0 +1,22 @@
+require = fn (ok: u1) void
+{
+    if (!ok) #trap();
+}
+
+E = enum
+{
+    a,
+    b,
+    c,
+    d,
+}
+
+[export] main = fn [cc(c)] () s32
+{
+    >some_enum_array: enum_array[E](u32) = [ .a = 4, .b = 3, .c = 2, .d = 1 ];
+    require(some_enum_array[.a] == 4);
+    require(some_enum_array[.b] == 3);
+    require(some_enum_array[.c] == 2);
+    require(some_enum_array[.d] == 1);
+    return 0;
+}

tests/opaque.bbb

@@ -0,0 +1,16 @@
+OpaqueType = opaque;
+
+[extern] memcpy = fn [cc(c)] (destination: &s32, source: &s32, size: u64) &OpaqueType;
+
+[export] main = fn [cc(c)] () s32
+{
+    >destination: s32 = 1;
+    >source: s32 = 0;
+    >opaque_pointer = memcpy(&destination, &source, #byte_size(s32));
+    >pointer: &s32 = #pointer_cast(opaque_pointer);
+    if (pointer != &destination)
+    {
+        #trap();
+    }
+    return destination;
+}