fix(go): duplicate conversion functions when parent structs have the same base name

packages/jsii-calc/lib/index.ts

@@ -13,3 +13,5 @@ export * as onlystatic from './only-static';
 export * as nodirect from './no-direct-types';
 export * as module2647 from './module2647';
 export * as module2689 from './module2689';
+export * as module2692 from './module2692';
+export * as module2530 from './module2530';

packages/jsii-calc/lib/module2530/index.ts

@@ -0,0 +1,17 @@
+/**
+ * Verifies a method with parameters "_" can be generated.
+ * @see https://github.com/aws/jsii/issues/2530
+ */
+export class MyClass {
+  public static bar(_: boolean) {
+    return;
+  }
+
+  public constructor(_: number) {
+    return;
+  }
+
+  public foo(_: string) {
+    return;
+  }
+}

packages/jsii-calc/lib/module2692/index.ts

@@ -0,0 +1,2 @@
+export * as submodule1 from './submodule1';
+export * as submodule2 from './submodule2';

packages/jsii-calc/lib/module2692/submodule1/index.ts

@@ -0,0 +1,3 @@
+export interface Bar {
+  readonly bar1: string;
+}

packages/jsii-calc/lib/module2692/submodule2/index.ts

@@ -0,0 +1,9 @@
+import { Bar as Bar1 } from '../submodule1';
+
+export interface Bar {
+  readonly bar2: string;
+}
+
+export interface Foo extends Bar, Bar1 {
+  readonly foo2: string;
+}

packages/jsii-calc/test/assembly.jsii

@@ -211,6 +211,12 @@
         "line": 142
       }
     },
+    "jsii-calc.module2530": {
+      "locationInModule": {
+        "filename": "lib/index.ts",
+        "line": 17
+      }
+    },
     "jsii-calc.module2647": {
       "locationInModule": {
         "filename": "lib/index.ts",
@@ -247,6 +253,24 @@
         "line": 7
       }
     },
+    "jsii-calc.module2692": {
+      "locationInModule": {
+        "filename": "lib/index.ts",
+        "line": 16
+      }
+    },
+    "jsii-calc.module2692.submodule1": {
+      "locationInModule": {
+        "filename": "lib/module2692/index.ts",
+        "line": 1
+      }
+    },
+    "jsii-calc.module2692.submodule2": {
+      "locationInModule": {
+        "filename": "lib/module2692/index.ts",
+        "line": 2
+      }
+    },
     "jsii-calc.nodirect": {
       "locationInModule": {
         "filename": "lib/index.ts",
@@ -14155,6 +14179,78 @@
       "name": "CompositionStringStyle",
       "namespace": "composition.CompositeOperation"
     },
+    "jsii-calc.module2530.MyClass": {
+      "assembly": "jsii-calc",
+      "docs": {
+        "see": "https://github.com/aws/jsii/issues/2530",
+        "stability": "stable",
+        "summary": "Verifies a method with parameters \"_\" can be generated."
+      },
+      "fqn": "jsii-calc.module2530.MyClass",
+      "initializer": {
+        "docs": {
+          "stability": "stable"
+        },
+        "locationInModule": {
+          "filename": "lib/module2530/index.ts",
+          "line": 10
+        },
+        "parameters": [
+          {
+            "name": "_",
+            "type": {
+              "primitive": "number"
+            }
+          }
+        ]
+      },
+      "kind": "class",
+      "locationInModule": {
+        "filename": "lib/module2530/index.ts",
+        "line": 5
+      },
+      "methods": [
+        {
+          "docs": {
+            "stability": "stable"
+          },
+          "locationInModule": {
+            "filename": "lib/module2530/index.ts",
+            "line": 6
+          },
+          "name": "bar",
+          "parameters": [
+            {
+              "name": "_",
+              "type": {
+                "primitive": "boolean"
+              }
+            }
+          ],
+          "static": true
+        },
+        {
+          "docs": {
+            "stability": "stable"
+          },
+          "locationInModule": {
+            "filename": "lib/module2530/index.ts",
+            "line": 14
+          },
+          "name": "foo",
+          "parameters": [
+            {
+              "name": "_",
+              "type": {
+                "primitive": "string"
+              }
+            }
+          ]
+        }
+      ],
+      "name": "MyClass",
+      "namespace": "module2530"
+    },
     "jsii-calc.module2647.ExtendAndImplement": {
       "assembly": "jsii-calc",
       "base": "@scope/jsii-calc-lib.BaseFor2647",
@@ -14470,6 +14566,106 @@
         }
       ]
     },
+    "jsii-calc.module2692.submodule1.Bar": {
+      "assembly": "jsii-calc",
+      "datatype": true,
+      "docs": {
+        "stability": "stable"
+      },
+      "fqn": "jsii-calc.module2692.submodule1.Bar",
+      "kind": "interface",
+      "locationInModule": {
+        "filename": "lib/module2692/submodule1/index.ts",
+        "line": 1
+      },
+      "name": "Bar",
+      "namespace": "module2692.submodule1",
+      "properties": [
+        {
+          "abstract": true,
+          "docs": {
+            "stability": "stable"
+          },
+          "immutable": true,
+          "locationInModule": {
+            "filename": "lib/module2692/submodule1/index.ts",
+            "line": 2
+          },
+          "name": "bar1",
+          "type": {
+            "primitive": "string"
+          }
+        }
+      ]
+    },
+    "jsii-calc.module2692.submodule2.Bar": {
+      "assembly": "jsii-calc",
+      "datatype": true,
+      "docs": {
+        "stability": "stable"
+      },
+      "fqn": "jsii-calc.module2692.submodule2.Bar",
+      "kind": "interface",
+      "locationInModule": {
+        "filename": "lib/module2692/submodule2/index.ts",
+        "line": 3
+      },
+      "name": "Bar",
+      "namespace": "module2692.submodule2",
+      "properties": [
+        {
+          "abstract": true,
+          "docs": {
+            "stability": "stable"
+          },
+          "immutable": true,
+          "locationInModule": {
+            "filename": "lib/module2692/submodule2/index.ts",
+            "line": 4
+          },
+          "name": "bar2",
+          "type": {
+            "primitive": "string"
+          }
+        }
+      ]
+    },
+    "jsii-calc.module2692.submodule2.Foo": {
+      "assembly": "jsii-calc",
+      "datatype": true,
+      "docs": {
+        "stability": "stable"
+      },
+      "fqn": "jsii-calc.module2692.submodule2.Foo",
+      "interfaces": [
+        "jsii-calc.module2692.submodule2.Bar",
+        "jsii-calc.module2692.submodule1.Bar"
+      ],
+      "kind": "interface",
+      "locationInModule": {
+        "filename": "lib/module2692/submodule2/index.ts",
+        "line": 7
+      },
+      "name": "Foo",
+      "namespace": "module2692.submodule2",
+      "properties": [
+        {
+          "abstract": true,
+          "docs": {
+            "stability": "stable"
+          },
+          "immutable": true,
+          "locationInModule": {
+            "filename": "lib/module2692/submodule2/index.ts",
+            "line": 8
+          },
+          "name": "foo2",
+          "type": {
+            "primitive": "string"
+          }
+        }
+      ]
+    },
     "jsii-calc.nodirect.sub1.TypeFromSub1": {
       "assembly": "jsii-calc",
       "docs": {
@@ -15226,5 +15422,5 @@
     }
   },
   "version": "3.20.120",
-  "fingerprint": "bEIqxJjC2BFJEo5AIzysYAdDCVZcHPAm+paBHx0vvKE="
+  "fingerprint": "hBZRskNm0XPeSO9U+PMqKKVZ2faqmKnE9eVN2tY1Wik="
 }

packages/jsii-pacmak/lib/targets/go/types/struct.ts

@@ -7,7 +7,6 @@ import { Package } from '../package';
 import { JSII_RT_ALIAS } from '../runtime';
 import { getMemberDependencies } from '../util';
 import { GoType } from './go-type';
-import { GoTypeRef } from './go-type-reference';
 import { GoProperty } from './type-member';
 
 /*
@@ -50,8 +49,6 @@ export class Struct extends GoType {
     }
     code.closeBlock();
     code.line();
-
-    this.emitBaseConversions(context);
   }
 
   public emitRegistration(code: CodeMaker): void {
@@ -60,34 +57,4 @@ export class Struct extends GoType {
     code.line(`reflect.TypeOf((*${this.name})(nil)).Elem(),`);
     code.close(')');
   }
-
-  private emitBaseConversions({ code }: EmitContext) {
-    for (const base of this.type.getInterfaces(true)) {
-      const baseType = this.pkg.root.findType(base.fqn) as Struct;
-      const funcName = `To${baseType.name}`;
-      const instanceVar = this.name[0].toLowerCase();
-      const valType = new GoTypeRef(this.pkg.root, base.reference).scopedName(
-        this.pkg,
-      );
-
-      code.line(
-        `// ${funcName} is a convenience function to obtain a new ${valType} from this ${this.name}.`,
-      );
-      // Note - using a pointer receiver here as a convenience, as otherwise
-      // user code that somehow has only a pointer would need to first
-      // dereference it, which tends to be a code smell.
-      code.openBlock(
-        `func (${instanceVar} *${this.name}) ${funcName}() ${valType}`,
-      );
-
-      code.openBlock(`return ${valType}`);
-      for (const prop of baseType.properties) {
-        code.line(`${prop.name}: ${instanceVar}.${prop.name},`);
-      }
-      code.closeBlock();
-
-      code.closeBlock();
-      code.line();
-    }
-  }
 }

packages/jsii-pacmak/lib/targets/go/util.ts

@@ -94,6 +94,7 @@ const RESERVED_WORDS: { [word: string]: string } = {
   import: 'import_',
   return: 'return_',
   var: 'var_',
+  _: '_arg',
 };
 
 /*