allwpilib/upstream_utils/json_patches/0012-Add-const-getters-for-string-array-and-object.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Johnson <johnson.peter@gmail.com>
Date: Wed, 1 Apr 2026 08:15:04 -0700
Subject: [PATCH 12/25] Add const getters for string, array, and object

---
 json.cpp | 33 +++++++++++++++++++++++++++++++++
 json.h   |  3 +++
 2 files changed, 36 insertions(+)

diff --git a/json.cpp b/json.cpp
index 1266aa36b43155cbab6fe8d918fed2c56596f7a8..4aebebec76de7628792afbf176f46d61e2f67c43 100644
--- a/json.cpp
+++ b/json.cpp
@@ -521,6 +521,17 @@ json::get_string()
     }
 }
 
+const std::string&
+json::get_string() const
+{
+    switch (type_) {
+        case Type::String:
+            return string_value;
+        default:
+            ON_LOGIC_ERROR("JSON value is not a string.");
+    }
+}
+
 json::array_t&
 json::get_array()
 {
@@ -532,6 +543,17 @@ json::get_array()
     }
 }
 
+const json::array_t&
+json::get_array() const
+{
+    switch (type_) {
+        case Type::Array:
+            return array_value;
+        default:
+            ON_LOGIC_ERROR("JSON value is not an array.");
+    }
+}
+
 json::object_t&
 json::get_object()
 {
@@ -543,6 +565,17 @@ json::get_object()
     }
 }
 
+const json::object_t&
+json::get_object() const
+{
+    switch (type_) {
+        case Type::Object:
+            return object_value;
+        default:
+            ON_LOGIC_ERROR("JSON value is not an object.");
+    }
+}
+
 void
 json::set_array()
 {
diff --git a/json.h b/json.h
index 9aa5c889932e720746972d9e8ef1dd8b095e0fb1..2a4c009e4b3cf7f1ccac8b09986853ccd3540f9d 100644
--- a/json.h
+++ b/json.h
@@ -202,8 +202,11 @@ class json
     double get_number() const;
     long long get_int() const;
     std::string& get_string();
+    const std::string& get_string() const;
     array_t& get_array();
+    const array_t& get_array() const;
     object_t& get_object();
+    const object_t& get_object() const;
 
     bool contains(const std::string&) const;