From a7cf442bf9b819cae3ce6cd269b2524d69350f04 Mon Sep 17 00:00:00 2001
From: Asher Gomez <ashersaupingomez@gmail.com>
Date: Thu, 4 Jul 2024 09:39:27 +1000
Subject: [PATCH 1/2] BREAKING(yaml): rename `ParseOptions.json` to
 `ParseOptions.allowDuplicateKeys`

---
 yaml/_loader.ts | 10 +++++-----
 yaml/parse.ts   |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/yaml/_loader.ts b/yaml/_loader.ts
index a8532fcb63a5..d0237259a5bc 100644
--- a/yaml/_loader.ts
+++ b/yaml/_loader.ts
@@ -63,7 +63,7 @@ interface LoaderStateOptions {
   /** specifies a schema to use. */
   schema?: Schema;
   /** compatibility with JSON.parse behaviour. */
-  json?: boolean;
+  allowDuplicateKeys?: boolean;
   /** function to call on warning messages. */
   onWarning?(this: null, e?: YamlError): void;
 }
@@ -80,7 +80,7 @@ class LoaderState {
   position = 0;
   line = 0;
   onWarning?: (...args: Any[]) => void;
-  json: boolean;
+  allowDuplicateKeys: boolean;
   implicitTypes: Type[];
   typeMap: TypeMap;
 
@@ -98,13 +98,13 @@ class LoaderState {
     {
       schema = DEFAULT_SCHEMA,
       onWarning,
-      json = false,
+      allowDuplicateKeys = false,
     }: LoaderStateOptions,
   ) {
     this.schema = schema;
     this.input = input;
     this.onWarning = onWarning;
-    this.json = json;
+    this.allowDuplicateKeys = allowDuplicateKeys;
     this.implicitTypes = this.schema.compiledImplicit;
     this.typeMap = this.schema.compiledTypeMap;
     this.length = input.length;
@@ -397,7 +397,7 @@ function storeMappingPair(
     }
   } else {
     if (
-      !state.json &&
+      !state.allowDuplicateKeys &&
       !Object.hasOwn(overridableKeys, keyNode) &&
       Object.hasOwn(result, keyNode)
     ) {
diff --git a/yaml/parse.ts b/yaml/parse.ts
index c999ec5206a6..afe6ee1736ea 100644
--- a/yaml/parse.ts
+++ b/yaml/parse.ts
@@ -14,7 +14,7 @@ export interface ParseOptions {
   /** Name of the schema to use.*/
   schema?: "core" | "default" | "failsafe" | "json" | "extended";
   /** compatibility with JSON.parse behaviour. */
-  json?: boolean;
+  allowDuplicateKeys?: boolean;
   /** function to call on warning messages. */
   onWarning?(this: null, e?: Error): void;
 }

From 7cc1684ac1f5de8fab71e9ac8a9f8a34389d8ed4 Mon Sep 17 00:00:00 2001
From: Asher Gomez <ashersaupingomez@gmail.com>
Date: Thu, 4 Jul 2024 14:51:16 +1000
Subject: [PATCH 2/2] fix

---
 yaml/parse_test.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/yaml/parse_test.ts b/yaml/parse_test.ts
index eeaa52689691..2780af2b99c5 100644
--- a/yaml/parse_test.ts
+++ b/yaml/parse_test.ts
@@ -976,13 +976,13 @@ name: Jane Doe`,
   );
 });
 
-Deno.test("parse() allows duplicate keys when `json` option is set to `true`", () => {
+Deno.test("parse() allows duplicate keys when `allowDuplicateKeys` option is set to `true`", () => {
   assertEquals(
     parse(
       `name: John Doe
 age: 30
 name: Jane Doe`,
-      { json: true },
+      { allowDuplicateKeys: true },
     ),
     { name: "Jane Doe", age: 30 },
   );