2 * Copyright 2018 Dan Field
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 // independent from idl_parser, since this code is not needed for most clients
20 #include "flatbuffers/code_generators.h"
21 #include "flatbuffers/flatbuffers.h"
22 #include "flatbuffers/idl.h"
23 #include "flatbuffers/util.h"
25 namespace flatbuffers {
27 static std::string GeneratedFileName(const std::string &path,
28 const std::string &file_name) {
29 return path + file_name + "_generated.dart";
34 const std::string _kFb = "fb";
35 // see https://www.dartlang.org/guides/language/language-tour#keywords
36 // yeild*, async*, and sync* shouldn't be problems anyway but keeping them in
37 static const char *keywords[] = {
38 "abstract", "deferred", "if", "super", "as", "do",
39 "implements", "switch", "assert", "dynamic", "import", "sync*",
40 "async", "else", "in", "this", "async*", "enum",
41 "is", "throw", "await", "export", "library", "true",
42 "break", "external", "new", "try", "case", "extends",
43 "null", "typedef", "catch", "factory", "operator", "var",
44 "class", "false", "part", "void", "const", "final",
45 "rethrow", "while", "continue", "finally", "return", "with",
46 "covariant", "for", "set", "yield", "default", "get",
50 // Iterate through all definitions we haven't generate code for (enums, structs,
51 // and tables) and output them to a single file.
52 class DartGenerator : public BaseGenerator {
54 typedef std::map<std::string, std::string> namespace_code_map;
56 DartGenerator(const Parser &parser, const std::string &path,
57 const std::string &file_name)
58 : BaseGenerator(parser, path, file_name, "", ".") {}
59 // Iterate through all definitions we haven't generate code for (enums,
60 // structs, and tables) and output them to a single file.
63 namespace_code_map namespace_code;
64 GenerateEnums(&namespace_code);
65 GenerateStructs(&namespace_code);
67 for (auto kv = namespace_code.begin(); kv != namespace_code.end(); ++kv) {
69 code = code + "// " + FlatBuffersGeneratedWarning() + "\n";
71 "// ignore_for_file: unused_import, unused_field, "
72 "unused_local_variable\n\n";
74 if (!kv->first.empty()) { code += "library " + kv->first + ";\n\n"; }
76 code += "import 'dart:typed_data' show Uint8List;\n";
77 code += "import 'package:flat_buffers/flat_buffers.dart' as " + _kFb +
80 if (parser_.opts.include_dependence_headers) {
81 GenIncludeDependencies(&code, kv->first);
84 for (auto kv2 = namespace_code.begin(); kv2 != namespace_code.end();
86 if (kv2->first != kv->first) {
90 (!kv2->first.empty() ? "_" + kv2->first : "")) +
91 "' as " + ImportAliasName(kv2->first) + ";\n";
97 if (!SaveFile(GeneratedFileName(
99 (!kv->first.empty() ? "_" + kv->first : ""))
109 static std::string ImportAliasName(const std::string &ns) {
112 size_t pos = ret.find('.');
113 while (pos != std::string::npos) {
114 ret.replace(pos, 1, "_");
115 pos = ret.find('.', pos + 1);
121 static std::string BuildNamespaceName(const Namespace &ns) {
122 if (ns.components.empty()) { return ""; }
123 std::stringstream sstream;
124 std::copy(ns.components.begin(), ns.components.end() - 1,
125 std::ostream_iterator<std::string>(sstream, "."));
127 auto ret = sstream.str() + ns.components.back();
128 for (size_t i = 0; i < ret.size(); i++) {
129 auto lower = tolower(ret[i]);
130 if (lower != ret[i]) {
131 ret[i] = static_cast<char>(lower);
132 if (i != 0 && ret[i - 1] != '.') {
138 // std::transform(ret.begin(), ret.end(), ret.begin(), ::tolower);
142 void GenIncludeDependencies(std::string *code,
143 const std::string &the_namespace) {
144 for (auto it = parser_.included_files_.begin();
145 it != parser_.included_files_.end(); ++it) {
146 if (it->second.empty()) continue;
148 auto noext = flatbuffers::StripExtension(it->second);
149 auto basename = flatbuffers::StripPath(noext);
154 "", basename + (the_namespace == "" ? "" : "_" + the_namespace)) +
159 static std::string EscapeKeyword(const std::string &name) {
160 for (size_t i = 0; i < sizeof(keywords) / sizeof(keywords[0]); i++) {
161 if (name == keywords[i]) { return MakeCamel(name + "_", false); }
164 return MakeCamel(name, false);
167 void GenerateEnums(namespace_code_map *namespace_code) {
168 for (auto it = parser_.enums_.vec.begin(); it != parser_.enums_.vec.end();
170 auto &enum_def = **it;
171 GenEnum(enum_def, namespace_code); // enum_code_ptr);
175 void GenerateStructs(namespace_code_map *namespace_code) {
176 for (auto it = parser_.structs_.vec.begin();
177 it != parser_.structs_.vec.end(); ++it) {
178 auto &struct_def = **it;
179 GenStruct(struct_def, namespace_code);
183 // Generate a documentation comment, if available.
184 static void GenDocComment(const std::vector<std::string> &dc,
185 std::string *code_ptr,
186 const std::string &extra_lines,
187 const char *indent = nullptr) {
188 if (dc.empty() && extra_lines.empty()) {
189 // Don't output empty comment blocks with 0 lines of comment content.
193 auto &code = *code_ptr;
195 for (auto it = dc.begin(); it != dc.end(); ++it) {
196 if (indent) code += indent;
197 code += "/// " + *it + "\n";
199 if (!extra_lines.empty()) {
201 if (indent) code += indent;
204 if (indent) code += indent;
205 std::string::size_type start = 0;
207 auto end = extra_lines.find('\n', start);
208 if (end != std::string::npos) {
209 code += "/// " + extra_lines.substr(start, end - start) + "\n";
212 code += "/// " + extra_lines.substr(start) + "\n";
219 static void GenDocComment(std::string *code_ptr,
220 const std::string &extra_lines) {
221 GenDocComment(std::vector<std::string>(), code_ptr, extra_lines);
224 // Generate an enum declaration and an enum string lookup table.
225 void GenEnum(EnumDef &enum_def, namespace_code_map *namespace_code) {
226 if (enum_def.generated) return;
227 auto ns = BuildNamespaceName(*enum_def.defined_namespace);
229 GenDocComment(enum_def.doc_comment, &code, "");
231 auto name = enum_def.is_union ? enum_def.name + "TypeId" : enum_def.name;
232 auto is_bit_flags = enum_def.attributes.Lookup("bit_flags");
234 code += "class " + name + " {\n";
235 code += " final int value;\n";
236 code += " const " + name + "._(this.value);\n\n";
237 code += " factory " + name + ".fromValue(int value) {\n";
238 code += " if (value == null) value = 0;\n";
240 code += " if (!values.containsKey(value)) {\n";
242 " throw new StateError('Invalid value $value for bit flag enum ";
243 code += name + "');\n";
246 code += " return values[value];\n";
249 // this is meaningless for bit_flags
250 // however, note that unlike "regular" dart enums this enum can still have
253 code += " static const int minValue = " +
254 enum_def.ToString(*enum_def.MinValue()) + ";\n";
255 code += " static const int maxValue = " +
256 enum_def.ToString(*enum_def.MaxValue()) + ";\n";
260 " static bool containsValue(int value) =>"
261 " values.containsKey(value);\n\n";
263 for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); ++it) {
266 if (!ev.doc_comment.empty()) {
267 if (it != enum_def.Vals().begin()) { code += '\n'; }
268 GenDocComment(ev.doc_comment, &code, "", " ");
270 code += " static const " + name + " " + ev.name + " = ";
271 code += "const " + name + "._(" + enum_def.ToString(ev) + ");\n";
274 code += " static get values => {";
275 for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end(); ++it) {
277 code += enum_def.ToString(ev) + ": " + ev.name + ",";
281 code += " static const " + _kFb + ".Reader<" + name +
282 "> reader = const _" + name + "Reader();\n\n";
283 code += " @override\n";
284 code += " String toString() {\n";
285 code += " return '" + name + "{value: $value}';\n";
289 GenEnumReader(enum_def, name, &code);
290 (*namespace_code)[ns] += code;
293 void GenEnumReader(EnumDef &enum_def, const std::string &name,
294 std::string *code_ptr) {
295 auto &code = *code_ptr;
297 code += "class _" + name + "Reader extends " + _kFb + ".Reader<" + name +
299 code += " const _" + name + "Reader();\n\n";
300 code += " @override\n";
301 code += " int get size => 1;\n\n";
302 code += " @override\n";
304 " " + name + " read(" + _kFb + ".BufferContext bc, int offset) =>\n";
305 code += " new " + name + ".fromValue(const " + _kFb + "." +
306 GenType(enum_def.underlying_type) + "Reader().read(bc, offset));\n";
310 static std::string GenType(const Type &type) {
311 switch (type.base_type) {
312 case BASE_TYPE_BOOL: return "Bool";
313 case BASE_TYPE_CHAR: return "Int8";
314 case BASE_TYPE_UTYPE:
315 case BASE_TYPE_UCHAR: return "Uint8";
316 case BASE_TYPE_SHORT: return "Int16";
317 case BASE_TYPE_USHORT: return "Uint16";
318 case BASE_TYPE_INT: return "Int32";
319 case BASE_TYPE_UINT: return "Uint32";
320 case BASE_TYPE_LONG: return "Int64";
321 case BASE_TYPE_ULONG: return "Uint64";
322 case BASE_TYPE_FLOAT: return "Float32";
323 case BASE_TYPE_DOUBLE: return "Float64";
324 case BASE_TYPE_STRING: return "String";
325 case BASE_TYPE_VECTOR: return GenType(type.VectorType());
326 case BASE_TYPE_STRUCT: return type.struct_def->name;
327 case BASE_TYPE_UNION: return type.enum_def->name + "TypeId";
328 default: return "Table";
332 std::string GenReaderTypeName(const Type &type, Namespace *current_namespace,
334 bool parent_is_vector = false) {
335 if (type.base_type == BASE_TYPE_BOOL) {
336 return "const " + _kFb + ".BoolReader()";
337 } else if (type.base_type == BASE_TYPE_VECTOR) {
338 return "const " + _kFb + ".ListReader<" +
339 GenDartTypeName(type.VectorType(), current_namespace, def) + ">(" +
340 GenReaderTypeName(type.VectorType(), current_namespace, def,
343 } else if (type.base_type == BASE_TYPE_STRING) {
344 return "const " + _kFb + ".StringReader()";
346 if (IsScalar(type.base_type)) {
347 if (type.enum_def && parent_is_vector) {
348 return GenDartTypeName(type, current_namespace, def) + ".reader";
350 return "const " + _kFb + "." + GenType(type) + "Reader()";
352 return GenDartTypeName(type, current_namespace, def) + ".reader";
356 std::string GenDartTypeName(const Type &type, Namespace *current_namespace,
357 const FieldDef &def, bool addBuilder = false) {
359 if (type.enum_def->is_union && type.base_type != BASE_TYPE_UNION) {
360 return type.enum_def->name + "TypeId";
361 } else if (type.enum_def->is_union) {
363 } else if (type.base_type != BASE_TYPE_VECTOR) {
364 return type.enum_def->name;
368 switch (type.base_type) {
369 case BASE_TYPE_BOOL: return "bool";
371 case BASE_TYPE_ULONG:
374 case BASE_TYPE_SHORT:
375 case BASE_TYPE_USHORT:
377 case BASE_TYPE_UCHAR: return "int";
378 case BASE_TYPE_FLOAT:
379 case BASE_TYPE_DOUBLE: return "double";
380 case BASE_TYPE_STRING: return "String";
381 case BASE_TYPE_STRUCT:
382 return MaybeWrapNamespace(
383 type.struct_def->name + (addBuilder ? "ObjectBuilder" : ""),
384 current_namespace, def);
385 case BASE_TYPE_VECTOR:
387 GenDartTypeName(type.VectorType(), current_namespace, def,
390 default: assert(0); return "dynamic";
394 static const std::string MaybeWrapNamespace(const std::string &type_name,
395 Namespace *current_ns,
396 const FieldDef &field) {
397 auto curr_ns_str = BuildNamespaceName(*current_ns);
398 std::string field_ns_str = "";
399 if (field.value.type.struct_def) {
401 BuildNamespaceName(*field.value.type.struct_def->defined_namespace);
402 } else if (field.value.type.enum_def) {
404 BuildNamespaceName(*field.value.type.enum_def->defined_namespace);
407 if (field_ns_str != "" && field_ns_str != curr_ns_str) {
408 return ImportAliasName(field_ns_str) + "." + type_name;
414 // Generate an accessor struct with constructor for a flatbuffers struct.
415 void GenStruct(const StructDef &struct_def,
416 namespace_code_map *namespace_code) {
417 if (struct_def.generated) return;
419 auto object_namespace = BuildNamespaceName(*struct_def.defined_namespace);
422 const auto &object_name = struct_def.name;
426 GenDocComment(struct_def.doc_comment, &code, "");
428 auto reader_name = "_" + object_name + "Reader";
429 auto builder_name = object_name + "Builder";
430 auto object_builder_name = object_name + "ObjectBuilder";
432 std::string reader_code, builder_code;
434 code += "class " + object_name + " {\n";
436 code += " " + object_name + "._(this._bc, this._bcOffset);\n";
437 if (!struct_def.fixed) {
438 code += " factory " + object_name + "(List<int> bytes) {\n";
439 code += " " + _kFb + ".BufferContext rootRef = new " + _kFb +
440 ".BufferContext.fromBytes(bytes);\n";
441 code += " return reader.read(rootRef, 0);\n";
446 code += " static const " + _kFb + ".Reader<" + object_name +
447 "> reader = const " + reader_name + "();\n\n";
449 code += " final " + _kFb + ".BufferContext _bc;\n";
450 code += " final int _bcOffset;\n\n";
452 GenImplementationGetters(struct_def, &code);
456 GenReader(struct_def, &reader_name, &reader_code);
457 GenBuilder(struct_def, &builder_name, &builder_code);
458 GenObjectBuilder(struct_def, &object_builder_name, &builder_code);
461 code += builder_code;
463 (*namespace_code)[object_namespace] += code;
466 std::string NamespaceAliasFromUnionType(const std::string &in) {
467 if (in.find('_') == std::string::npos) { return in; }
469 std::stringstream ss(in);
471 std::vector<std::string> parts;
474 while (std::getline(ss, item, '_')) { parts.push_back(item); }
476 for (auto it = parts.begin(); it != parts.end() - 1; ++it) {
479 for (size_t i = 0; i < part.length(); i++) {
480 if (i && !isdigit(part[i]) &&
481 part[i] == static_cast<char>(toupper(part[i]))) {
483 ns += static_cast<char>(tolower(part[i]));
485 ns += static_cast<char>(tolower(part[i]));
488 if (it != parts.end() - 2) { ns += "_"; }
491 return ns + "." + parts.back();
494 void GenImplementationGetters(const StructDef &struct_def,
495 std::string *code_ptr) {
496 auto &code = *code_ptr;
498 for (auto it = struct_def.fields.vec.begin();
499 it != struct_def.fields.vec.end(); ++it) {
501 if (field.deprecated) continue;
503 std::string field_name = MakeCamel(field.name, false);
504 std::string type_name = GenDartTypeName(
505 field.value.type, struct_def.defined_namespace, field, false);
507 GenDocComment(field.doc_comment, &code, "", " ");
509 code += " " + type_name + " get " + field_name;
510 if (field.value.type.base_type == BASE_TYPE_UNION) {
512 code += " switch (" + field_name + "Type?.value) {\n";
513 auto &enum_def = *field.value.type.enum_def;
514 for (auto en_it = enum_def.Vals().begin() + 1;
515 en_it != enum_def.Vals().end(); ++en_it) {
518 auto enum_name = NamespaceAliasFromUnionType(ev.name);
519 code += " case " + enum_def.ToString(ev) + ": return " +
520 enum_name + ".reader.vTableGet(_bc, _bcOffset, " +
521 NumToString(field.value.offset) + ", null);\n";
523 code += " default: return null;\n";
528 if (field.value.type.enum_def &&
529 field.value.type.base_type != BASE_TYPE_VECTOR) {
531 GenDartTypeName(field.value.type,
532 struct_def.defined_namespace, field) +
536 code += GenReaderTypeName(field.value.type,
537 struct_def.defined_namespace, field);
538 if (struct_def.fixed) {
540 ".read(_bc, _bcOffset + " + NumToString(field.value.offset) + ")";
542 code += ".vTableGet(_bc, _bcOffset, " +
543 NumToString(field.value.offset) + ", ";
544 if (!field.value.constant.empty() && field.value.constant != "0") {
545 if (IsBool(field.value.type.base_type)) {
548 code += field.value.constant;
551 if (IsBool(field.value.type.base_type)) {
553 } else if (IsScalar(field.value.type.base_type)) {
561 if (field.value.type.enum_def &&
562 field.value.type.base_type != BASE_TYPE_VECTOR) {
571 code += " @override\n";
572 code += " String toString() {\n";
573 code += " return '" + struct_def.name + "{";
574 for (auto it = struct_def.fields.vec.begin();
575 it != struct_def.fields.vec.end(); ++it) {
577 if (field.deprecated) continue;
579 MakeCamel(field.name, false) + ": $" + MakeCamel(field.name, false);
580 if (it != struct_def.fields.vec.end() - 1) { code += ", "; }
586 void GenReader(const StructDef &struct_def, std::string *reader_name_ptr,
587 std::string *code_ptr) {
588 auto &code = *code_ptr;
589 auto &reader_name = *reader_name_ptr;
590 auto &impl_name = struct_def.name;
592 code += "class " + reader_name + " extends " + _kFb;
593 if (struct_def.fixed) {
594 code += ".StructReader<";
596 code += ".TableReader<";
598 code += impl_name + "> {\n";
599 code += " const " + reader_name + "();\n\n";
601 if (struct_def.fixed) {
602 code += " @override\n";
603 code += " int get size => " + NumToString(struct_def.bytesize) + ";\n\n";
605 code += " @override\n";
606 code += " " + impl_name +
607 " createObject(fb.BufferContext bc, int offset) => \n new " +
608 impl_name + "._(bc, offset);\n";
612 void GenBuilder(const StructDef &struct_def, std::string *builder_name_ptr,
613 std::string *code_ptr) {
614 if (struct_def.fields.vec.size() == 0) { return; }
615 auto &code = *code_ptr;
616 auto &builder_name = *builder_name_ptr;
618 code += "class " + builder_name + " {\n";
619 code += " " + builder_name + "(this.fbBuilder) {\n";
620 code += " assert(fbBuilder != null);\n";
622 code += " final " + _kFb + ".Builder fbBuilder;\n\n";
624 if (struct_def.fixed) {
625 StructBuilderBody(struct_def, code_ptr);
627 TableBuilderBody(struct_def, code_ptr);
633 void StructBuilderBody(const StructDef &struct_def, std::string *code_ptr) {
634 auto &code = *code_ptr;
636 code += " int finish(";
637 for (auto it = struct_def.fields.vec.begin();
638 it != struct_def.fields.vec.end(); ++it) {
640 if (field.deprecated) continue;
642 if (IsStruct(field.value.type)) {
643 code += "fb.StructBuilder";
645 code += GenDartTypeName(field.value.type, struct_def.defined_namespace,
648 code += " " + field.name;
649 if (it != struct_def.fields.vec.end() - 1) { code += ", "; }
653 for (auto it = struct_def.fields.vec.rbegin();
654 it != struct_def.fields.vec.rend(); ++it) {
657 if (field.deprecated) continue;
660 code += " fbBuilder.pad(" + NumToString(field.padding) + ");\n";
663 if (IsStruct(field.value.type)) {
664 code += " " + field.name + "();\n";
666 code += " fbBuilder.put" + GenType(field.value.type) + "(";
668 if (field.value.type.enum_def) { code += "?.value"; }
672 code += " return fbBuilder.offset;\n";
676 void TableBuilderBody(const StructDef &struct_def, std::string *code_ptr) {
677 auto &code = *code_ptr;
679 code += " void begin() {\n";
680 code += " fbBuilder.startTable();\n";
683 for (auto it = struct_def.fields.vec.begin();
684 it != struct_def.fields.vec.end(); ++it) {
686 if (field.deprecated) continue;
688 auto offset = it - struct_def.fields.vec.begin();
690 if (IsScalar(field.value.type.base_type)) {
691 code += " int add" + MakeCamel(field.name) + "(";
692 code += GenDartTypeName(field.value.type, struct_def.defined_namespace,
694 code += " " + MakeCamel(field.name, false) + ") {\n";
695 code += " fbBuilder.add" + GenType(field.value.type) + "(" +
696 NumToString(offset) + ", ";
697 code += MakeCamel(field.name, false);
698 if (field.value.type.enum_def) { code += "?.value"; }
700 } else if (IsStruct(field.value.type)) {
701 code += " int add" + MakeCamel(field.name) + "(int offset) {\n";
703 " fbBuilder.addStruct(" + NumToString(offset) + ", offset);\n";
705 code += " int add" + MakeCamel(field.name) + "Offset(int offset) {\n";
707 " fbBuilder.addOffset(" + NumToString(offset) + ", offset);\n";
709 code += " return fbBuilder.offset;\n";
714 code += " int finish() {\n";
715 code += " return fbBuilder.endTable();\n";
719 void GenObjectBuilder(const StructDef &struct_def,
720 std::string *builder_name_ptr, std::string *code_ptr) {
721 auto &code = *code_ptr;
722 auto &builder_name = *builder_name_ptr;
724 code += "class " + builder_name + " extends " + _kFb + ".ObjectBuilder {\n";
725 for (auto it = struct_def.fields.vec.begin();
726 it != struct_def.fields.vec.end(); ++it) {
728 if (field.deprecated) continue;
730 GenDartTypeName(field.value.type, struct_def.defined_namespace,
732 " _" + MakeCamel(field.name, false) + ";\n";
735 code += " " + builder_name + "(";
736 if (struct_def.fields.vec.size() != 0) {
740 for (auto it = struct_def.fields.vec.begin();
741 it != struct_def.fields.vec.end(); ++it) {
743 if (field.deprecated) continue;
745 GenDartTypeName(field.value.type, struct_def.defined_namespace,
747 " " + MakeCamel(field.name, false) + ",\n";
751 for (auto it = struct_def.fields.vec.begin();
752 it != struct_def.fields.vec.end(); ++it) {
754 if (field.deprecated) continue;
755 code += "_" + MakeCamel(field.name, false) + " = " +
756 MakeCamel(field.name, false);
757 if (it == struct_def.fields.vec.end() - 1) {
767 code += " /// Finish building, and store into the [fbBuilder].\n";
768 code += " @override\n";
769 code += " int finish(\n";
770 code += " " + _kFb + ".Builder fbBuilder) {\n";
771 code += " assert(fbBuilder != null);\n";
773 for (auto it = struct_def.fields.vec.begin();
774 it != struct_def.fields.vec.end(); ++it) {
776 if (field.deprecated) continue;
777 if (IsScalar(field.value.type.base_type) || IsStruct(field.value.type))
780 code += " final int " + MakeCamel(field.name, false) + "Offset";
781 if (field.value.type.base_type == BASE_TYPE_VECTOR) {
783 " = _" + MakeCamel(field.name, false) + "?.isNotEmpty == true\n";
784 code += " ? fbBuilder.writeList";
785 switch (field.value.type.VectorType().base_type) {
786 case BASE_TYPE_STRING:
787 code += "(_" + MakeCamel(field.name, false) +
788 ".map((b) => fbBuilder.writeString(b)).toList())";
790 case BASE_TYPE_STRUCT:
791 if (field.value.type.struct_def->fixed) {
792 code += "OfStructs(_" + MakeCamel(field.name, false) + ")";
794 code += "(_" + MakeCamel(field.name, false) +
795 ".map((b) => b.getOrCreateOffset(fbBuilder)).toList())";
799 code += GenType(field.value.type.VectorType()) + "(_" +
800 MakeCamel(field.name, false);
801 if (field.value.type.enum_def) { code += ".map((f) => f.value)"; }
804 code += "\n : null;\n";
805 } else if (field.value.type.base_type == BASE_TYPE_STRING) {
806 code += " = fbBuilder.writeString(_" + MakeCamel(field.name, false) +
809 code += " = _" + MakeCamel(field.name, false) +
810 "?.getOrCreateOffset(fbBuilder);\n";
815 if (struct_def.fixed) {
816 StructObjectBuilderBody(struct_def, code_ptr);
818 TableObjectBuilderBody(struct_def, code_ptr);
822 code += " /// Convenience method to serialize to byte list.\n";
823 code += " @override\n";
824 code += " Uint8List toBytes([String fileIdentifier]) {\n";
825 code += " " + _kFb + ".Builder fbBuilder = new ";
826 code += _kFb + ".Builder();\n";
827 code += " int offset = finish(fbBuilder);\n";
828 code += " return fbBuilder.finish(offset, fileIdentifier);\n";
833 void StructObjectBuilderBody(const StructDef &struct_def,
834 std::string *code_ptr,
835 bool prependUnderscore = true) {
836 auto &code = *code_ptr;
838 for (auto it = struct_def.fields.vec.rbegin();
839 it != struct_def.fields.vec.rend(); ++it) {
842 if (field.deprecated) continue;
845 code += " fbBuilder.pad(" + NumToString(field.padding) + ");\n";
848 if (IsStruct(field.value.type)) {
850 if (prependUnderscore) { code += "_"; }
851 code += field.name + ".finish(fbBuilder);\n";
853 code += " fbBuilder.put" + GenType(field.value.type) + "(";
854 if (prependUnderscore) { code += "_"; }
856 if (field.value.type.enum_def) { code += "?.value"; }
861 code += " return fbBuilder.offset;\n";
864 void TableObjectBuilderBody(const StructDef &struct_def,
865 std::string *code_ptr,
866 bool prependUnderscore = true) {
867 std::string &code = *code_ptr;
868 code += " fbBuilder.startTable();\n";
870 for (auto it = struct_def.fields.vec.begin();
871 it != struct_def.fields.vec.end(); ++it) {
874 if (field.deprecated) continue;
876 auto offset = it - struct_def.fields.vec.begin();
877 if (IsScalar(field.value.type.base_type)) {
878 code += " fbBuilder.add" + GenType(field.value.type) + "(" +
879 NumToString(offset) + ", ";
880 if (prependUnderscore) { code += "_"; }
881 code += MakeCamel(field.name, false);
882 if (field.value.type.enum_def) { code += "?.value"; }
884 } else if (IsStruct(field.value.type)) {
886 if (prependUnderscore) { code += "_"; }
887 code += MakeCamel(field.name, false) + " != null) {\n";
888 code += " fbBuilder.addStruct(" + NumToString(offset) + ", ";
889 code += "_" + MakeCamel(field.name, false) + ".finish(fbBuilder));\n";
893 " if (" + MakeCamel(field.name, false) + "Offset != null) {\n";
894 code += " fbBuilder.addOffset(" + NumToString(offset) + ", " +
895 MakeCamel(field.name, false) + "Offset);\n";
899 code += " return fbBuilder.endTable();\n";
904 bool GenerateDart(const Parser &parser, const std::string &path,
905 const std::string &file_name) {
906 dart::DartGenerator generator(parser, path, file_name);
907 return generator.generate();
910 std::string DartMakeRule(const Parser &parser, const std::string &path,
911 const std::string &file_name) {
912 assert(parser.opts.lang <= IDLOptions::kMAX);
915 flatbuffers::StripPath(flatbuffers::StripExtension(file_name));
916 auto make_rule = GeneratedFileName(path, filebase) + ": ";
918 auto included_files = parser.GetIncludedFilesRecursive(file_name);
919 for (auto it = included_files.begin(); it != included_files.end(); ++it) {
920 make_rule += " " + *it;
925 } // namespace flatbuffers