[Bug] The readme example can't work. #216
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import 'package:dart_eval/dart_eval.dart';
void main() {
final compiler = Compiler();
final program = compiler.compile({
'my_package': {
'main.dart': '''
import 'package:my_package/finder.dart';
void main() {
final parentheses = findParentheses('Hello (world)');
if (parentheses.isNotEmpty) print(parentheses);
}
''',
'finder.dart': r'''
List<int> findParentheses(string) {
final regex = RegExp(r'\((.*?)\)');
final matches = regex.allMatches(string);
List<int> result = [];
for (var match in matches) {
result.add(match.start);
}
return result;
}
'''
}
});
final runtime = Runtime.ofProgram(program);
print(runtime.executeLib(
'package:my_package/main.dart', 'main')); // prints '[6]'
}This works fine. It seems the error occurs in |
|
And the readme example import 'package:dart_eval/dart_eval.dart';
import 'package:dart_eval/dart_eval_bridge.dart';
import 'package:dart_eval/dart_eval_extensions.dart';
import 'package:dart_eval/stdlib/core.dart';
/// An example class we want to wrap
class Book {
Book(this.pages);
final List<String> pages;
String getPage(int index) => pages[index];
}
/// This is our wrapper class
class $Book implements $Instance {
/// Create a type specification for the dart_eval compiler
static final $type = BridgeTypeSpec('package:hello/book.dart', 'Book').ref;
/// Create a class declaration for the dart_eval compiler
static final $declaration = BridgeClassDef(BridgeClassType($type),
constructors: {
// Define the default constructor with an empty string
'': BridgeFunctionDef(
returns: $type.annotate,
params: ['pages'.param(CoreTypes.string.ref.annotate)])
.asConstructor
},
methods: {
'getPage': BridgeFunctionDef(
returns: CoreTypes.string.ref.annotate,
params: ['index'.param(CoreTypes.int.ref.annotate)],
).asMethod,
},
wrap: true);
/// Override $value and $reified to return the value
@override
final Book $value;
@override
get $reified => $value;
/// Create a constructor that wraps the Book class
$Book.wrap(this.$value);
static $Value? $new(Runtime runtime, $Value? target, List<$Value?> args) {
return $Book.wrap(Book(args[0]!.$value));
}
/// Create a wrapper for property and method getters
@override
$Value? $getProperty(Runtime runtime, String identifier) {
if (identifier == 'getPage') {
return $Function((_, target, args) {
return $String($value.getPage(args[0]!.$value));
});
}
return $Object(this).$getProperty(runtime, identifier);
}
/// Create a wrapper for property setters
@override
void $setProperty(Runtime runtime, String identifier, $Value value) {
return $Object(this).$setProperty(runtime, identifier, value);
}
/// Allow runtime type lookup
@override
int $getRuntimeType(Runtime runtime) => runtime.lookupType($type.spec!);
}
/// Now we can use it in dart_eval!
void main() {
final compiler = Compiler();
compiler.defineBridgeClass($Book.$declaration);
final program = compiler.compile({
'hello': {
'main.dart': '''
import 'book.dart';
void main() {
final book = Book(['Hello world!', 'Hello again!']);
print(book.getPage(1));
}
'''
}
});
final runtime = Runtime.ofProgram(program);
// Register static methods and constructors with the runtime
runtime.registerBridgeFunc('package:hello/book.dart', 'Book.', $Book.$new);
runtime.executeLib('package:hello/main.dart', 'main'); // -> 'Hello again!'
}Error log: |
================= I am having the same issue with $String() at compile step If I remove the $String() and put just the string compilation works but I get this error Failed to evaluate program: dart_eval runtime exception: TypeError: "Hi!": type 'String' is not a subtype of type '$Instance' RUNTIME STATEProgram offset: 83 |
|
Fixed issue with the readme Wrapper interop example. As far as the initial issue, I can't reproduce, this example is actually a test in dart_eval and it is working fine. |
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The readme example below can't work with dart_eval: ^0.7.9.
Below is the error log:
The text was updated successfully, but these errors were encountered: