Dart/Flutter AST Generator
Parse a Dart or Flutter file and return a opinionated AST for use to create a dynamic widget or runtime. Works in a browser or native at runtime.
You can pass an input as a file or directory:
$ dart ./bin/generator.dart -p samples/example.dart
$ dart ./bin/generator.dart -p samples
Or you can call the method directly:
final DartResult result = parseSource("Dart Code Here");
print(result.toJson());Features
β Classesβ Enumsβ Logic Treeβ Flutter Supportβ Top Level Methods and Variablesβ Methodsβ Fieldsβ Constructors
Example
Here is a sample input:
import 'package:flutter/material.dart';
enum MyEnum { one, type, three }
const int kGlobalField = 1;
/// This is a doc comment
class MyScreen extends StatelessWidget {
const MyScreen(this.position, {Key key, this.myField = false, this.mySecondField = 1,
this.numField = 3,
this.mapField = const {},
this.dateField,
this.listField = const [],
}) : super(key: key);
const MyScreen.alt(this.position, {Key key, this.mySecondField = double.infinity,
this.numField = 3,
this.mapField = const {},
this.listField = const [],
this.dateField,
}) : this.myField = true, super(key: key);
static const String routeName = '/my_route';
final bool myField;
final double mySecondField;
final num numField;
final Map mapField;
final DateTime dateField;
final List listField;
final int position;
// This is a normal comment
Map<String, dynamic> toJson() {
return {};
}
@override
Widget build(BuildContext context) {
if (myField) {
return mySecondField == 1 ? Container(color: Colors.red) : Container(color: Colors.blue);
}
return Container(
color: Colors.red,
width: 20,
child: Center(
child: Builder((context) {
return Text('Hello World');
}),
),
);
}
}
void myGlobalMethod() {
}
// Ignore this simple comment
class Simple {
String value;
}
And that would produce this output:
{
"file": {
"name": null,
"imports": [
"package:flutter/material.dart"
],
"classes": [
{
"name": "MyScreen",
"comments": [
"This is a doc comment"
],
"fields": [
{
"name": "routeName",
"type": "String"
},
{
"name": "myField",
"type": "bool"
},
{
"name": "mySecondField",
"type": "double"
},
{
"name": "numField",
"type": "num"
},
{
"name": "mapField",
"type": "Map"
},
{
"name": "dateField",
"type": "DateTime"
},
{
"name": "listField",
"type": "List"
},
{
"name": "position",
"type": "int"
}
],
"constructors": [
{
"name": "MyScreen",
"properties": [
{
"value": null,
"name": "key",
"type": "Key",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "false",
"name": "myField",
"type": "bool",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "1",
"name": "mySecondField",
"type": "double",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "3",
"name": "numField",
"type": "num",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "const {}",
"name": "mapField",
"type": "Map",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": null,
"name": "dateField",
"type": "DateTime",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "const []",
"name": "listField",
"type": "List",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
}
]
},
{
"name": "alt",
"properties": [
{
"value": null,
"name": "key",
"type": "Key",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": null,
"name": "mySecondField",
"type": "double",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "3",
"name": "numField",
"type": "num",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "const {}",
"name": "mapField",
"type": "Map",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": "const []",
"name": "listField",
"type": "List",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
},
{
"value": null,
"name": "dateField",
"type": "DateTime",
"isConst": false,
"isFinal": false,
"isNamed": true,
"isOptional": true,
"isPositional": false,
"isRequired": false,
"isRequiredPositional": false,
"isSynthetic": false,
"isRequiredNamed": false,
"isOptionalNamed": true
}
]
}
],
"methods": [
{
"name": "toJson",
"body": {
"name": "method_declaration",
"values": [
{
"name": "type",
"props": {
"0": "Map<String, dynamic>"
}
},
{
"name": "declaration",
"values": []
},
{
"name": "block_body",
"values": [
{
"name": "block",
"values": [
{
"name": "return",
"values": [
{
"name": "value",
"props": {
"0": {
"type": "Map",
"value": "{}"
}
}
}
]
}
]
}
]
}
]
},
"parameters": []
},
{
"name": "build",
"body": {
"name": "method_declaration",
"values": [
{
"name": "type",
"props": {
"0": "Widget"
}
},
{
"name": "declaration",
"values": []
},
{
"name": "block_body",
"values": [
{
"name": "block",
"values": [
{
"name": "if",
"values": [
{
"name": "name",
"props": {
"0": "myField"
}
},
{
"name": "block",
"values": [
{
"name": "return",
"values": [
{
"name": "conditional",
"values": [
{
"name": "binary",
"left": {
"name": "name",
"props": {
"0": "mySecondField"
}
},
"right": {
"name": "value",
"props": {
"0": {
"type": "int",
"value": "1"
}
}
},
"operation": "=="
},
{
"name": "constructor",
"value": "Container",
"arguments": {
"color": null
}
},
{
"name": "constructor",
"value": "Container",
"arguments": {
"color": null
}
}
]
}
]
}
]
}
]
},
{
"name": "return",
"values": [
{
"name": "constructor",
"value": "Container",
"arguments": {
"color": null,
"width": {
"name": "value",
"props": {
"0": {
"type": "int",
"value": "20"
}
}
},
"child": {
"name": "constructor",
"value": "Center",
"arguments": {
"child": {
"name": "constructor",
"value": "Builder",
"arguments": {}
}
}
}
}
}
]
}
]
}
]
}
]
},
"parameters": []
}
],
"tree": {
"name": null,
"body": {
"name": "block_body",
"values": [
{
"name": "block",
"values": [
{
"name": "if",
"values": [
{
"name": "name",
"props": {
"0": "myField"
}
},
{
"name": "block",
"values": [
{
"name": "return",
"values": [
{
"name": "conditional",
"values": [
{
"name": "binary",
"left": {
"name": "name",
"props": {
"0": "mySecondField"
}
},
"right": {
"name": "value",
"props": {
"0": {
"type": "int",
"value": "1"
}
}
},
"operation": "=="
},
{
"name": "constructor",
"value": "Container",
"arguments": {
"color": null
}
},
{
"name": "constructor",
"value": "Container",
"arguments": {
"color": null
}
}
]
}
]
}
]
}
]
},
{
"name": "return",
"values": [
{
"name": "constructor",
"value": "Container",
"arguments": {
"color": null,
"width": {
"name": "value",
"props": {
"0": {
"type": "int",
"value": "20"
}
}
},
"child": {
"name": "constructor",
"value": "Center",
"arguments": {
"child": {
"name": "constructor",
"value": "Builder",
"arguments": {}
}
}
}
}
}
]
}
]
}
]
},
"parameters": []
}
},
{
"name": "Simple",
"comments": [],
"fields": [
{
"name": "value",
"type": "String"
}
],
"constructors": [],
"methods": []
}
],
"enums": [
{
"name": "MyEnum",
"values": [
"one",
"type",
"three"
]
}
],
"fields": [
{
"name": "kGlobalField",
"type": "int"
}
],
"methods": [
{
"name": "myGlobalMethod",
"body": {
"name": "function_declaration",
"values": [
{
"name": "type",
"props": {
"0": "void"
}
},
{
"name": "declaration",
"values": []
},
{
"name": "function",
"values": [
{
"name": "block_body",
"values": [
{
"name": "block",
"values": []
}
]
}
]
}
]
},
"parameters": []
}
]
},
"errors": []
}