[record_use] Remove annotation recording examples (#3046)

Bug: #2977

Required to make https://dart-review.googlesource.com/c/sdk/+/478440 green.

Author: dcharkes

pkgs/hooks/example/link/package_with_assets/hook/link.dart

@@ -11,18 +11,31 @@ import 'package:data_assets/data_assets.dart';
 import 'package:hooks/hooks.dart';
 import 'package:record_use/record_use.dart';
 
-const multiplyIdentifier = Identifier(
+const someMethodIdentifier = Identifier(
   importUri: 'package:package_with_assets/package_with_assets.dart',
-  name: 'AssetUsed',
+  name: 'someMethod',
 );
 
+const someOtherMethodIdentifier = Identifier(
+  importUri: 'package:package_with_assets/package_with_assets.dart',
+  name: 'someOtherMethod',
+);
+
+final assetMapping = {
+  someMethodIdentifier: 'assets/used_asset.json',
+  someOtherMethodIdentifier: 'assets/unused_asset.json',
+};
+
 void main(List<String> args) async {
   await link(args, (input, output) async {
     final usages = input.usages;
 
-    final usedAssets = usages
-        .constantsOf(multiplyIdentifier)
-        .map((e) => e['assetName'] as String);
+    final usedAssets = [
+      for (final entry in assetMapping.entries)
+        if (usages.constArgumentsFor(entry.key).isNotEmpty ||
+            usages.hasNonConstArguments(entry.key))
+          entry.value,
+    ];
 
     output.assets.data.addAll(
       input.assets.data.where(

pkgs/hooks/example/link/package_with_assets/lib/package_with_assets.dart

@@ -10,19 +10,9 @@ import 'package:meta/meta.dart';
 //also https://github.com/dart-lang/sdk/issues/54003.
 
 /// A method that uses an asset.
-@AssetUsed('assets/used_asset.json')
+@RecordUse()
 String someMethod() => 'Using used_asset';
 
 /// Another method that uses an asset.
-@AssetUsed('assets/unused_asset.json')
-String someOtherMethod() => 'Using unused_asset';
-
-/// An annotation to mark that an asset is used.
 @RecordUse()
-class AssetUsed {
-  /// The name of the asset being used.
-  final String assetName;
-
-  /// Creates an [AssetUsed] annotation.
-  const AssetUsed(this.assetName);
-}
+String someOtherMethod() => 'Using unused_asset';

pkgs/record_use/test_data/drop_data_asset/bin/drop_data_asset_instances.dart

@@ -5,5 +5,5 @@
 import 'package:drop_data_asset/drop_data_asset.dart';
 
 void main(List<String> arguments) {
-  print('Hello world: ${MyMath.double(3)}!');
+  print('Hello world: ${const Double(3).run()}!');
 }

pkgs/record_use/test_data/drop_data_asset/hook/link.dart

@@ -46,17 +46,21 @@ void main(List<String> arguments) async {
       }
     }
 
-    // Tree-shake unused assets
-    final instances = usages.constantsOf(
-      Identifier(
-        importUri: 'package:${input.packageName}/src/${input.packageName}.dart',
-        name: 'RecordCallToC',
-      ),
-    );
-    for (final instance in instances) {
-      final symbol = instance['symbol'] as String;
-      print('An instance of "$instance" was found with the field "$symbol"');
-      symbols.add(symbol);
+    // Tree-shake unused assets using instances
+    for (final className in ['Double', 'Square']) {
+      final instances = usages.constantsOf(
+        Identifier(
+          importUri:
+              'package:${input.packageName}/src/${input.packageName}.dart',
+          name: className,
+        ),
+      );
+      print('Checking instances of $className...');
+      for (final instance in instances) {
+        print('An instance of "$className" was found: $instance');
+        // Map class name to asset symbol (lowercase)
+        symbols.add(className.toLowerCase());
+      }
     }
 
     final neededCodeAssets = [

pkgs/record_use/test_data/drop_data_asset/lib/src/drop_data_asset.dart

@@ -12,17 +12,20 @@ class MyMath {
 
   @RecordUse()
   static int multiply(int a, int b) => a * b;
+}
 
-  @RecordCallToC('double')
-  static int double(int a) => a + a;
+@RecordUse()
+class Double {
+  final int value;
+  const Double(this.value);
 
-  @RecordCallToC('square')
-  static int square(int a) => a * a;
+  int run() => value + value;
 }
 
 @RecordUse()
-class RecordCallToC {
-  final String symbol;
+class Square {
+  final int value;
+  const Square(this.value);
 
-  const RecordCallToC(this.symbol);
+  int run() => value * value;
 }

pkgs/record_use/test_data/drop_dylib_recording/bin/drop_dylib_recording_instances.dart

@@ -5,5 +5,5 @@
 import 'package:drop_dylib_recording/drop_dylib_recording.dart';
 
 void main(List<String> arguments) {
-  print('Hello world: ${MyMath.double(3)}!');
+  print('Hello world: ${const Double(3).run()}!');
 }

pkgs/record_use/test_data/drop_dylib_recording/hook/link.dart

@@ -51,16 +51,23 @@ void main(List<String> arguments) async {
 
     argumentsFile.writeAsStringSync(dataLines.join('\n'));
 
-    // Tree-shake unused assets
-    final instances = usages.constantsOf(
-      const Identifier(
-        importUri: 'package:drop_dylib_recording/src/drop_dylib_recording.dart',
-        name: 'RecordCallToC',
-      ),
-    );
-    for (final instance in instances) {
-      final symbol = instance['symbol'] as String;
-      symbols.add(symbol);
+    // Tree-shake unused assets using instances
+    for (final className in ['Double', 'Square']) {
+      final instances = usages.constantsOf(
+        Identifier(
+          importUri:
+              'package:drop_dylib_recording/src/drop_dylib_recording.dart',
+          name: className,
+        ),
+      );
+      for (final instance in instances) {
+        print('An instance of "$className" was found: $instance');
+        if (className == 'Double') {
+          symbols.add('add');
+        } else if (className == 'Square') {
+          symbols.add('multiply');
+        }
+      }
     }
 
     final neededCodeAssets = [

pkgs/record_use/test_data/drop_dylib_recording/lib/src/drop_dylib_recording.dart

@@ -14,17 +14,20 @@ class MyMath {
 
   @RecordUse()
   static int multiply(int a, int b) => bindings.multiply(a, b);
+}
 
-  @RecordCallToC('add')
-  static int double(int a) => bindings.add(a, a);
+@RecordUse()
+class Double {
+  final int value;
+  const Double(this.value);
 
-  @RecordCallToC('multiply')
-  static int square(int a) => bindings.multiply(a, a);
+  int run() => bindings.add(value, value);
 }
 
 @RecordUse()
-class RecordCallToC {
-  final String symbol;
+class Square {
+  final int value;
+  const Square(this.value);
 
-  const RecordCallToC(this.symbol);
+  int run() => bindings.multiply(value, value);
 }