docs: Update abseil replacement

Author: caiopiccirillo

README.md

@@ -122,7 +122,7 @@ See [Serializers](docs/serializers.md) for details.
 ### Requirements
 
 - C++20 compiler (GCC 11+, Clang 14+)
-- [Abseil](https://github.com/abseil/abseil-cpp) (for `absl::Status`)
+- No external dependencies for the core library
 
 ### Optional Dependencies
 
@@ -151,7 +151,7 @@ set(CPPFIG_ENABLE_JSON ON)
 Core (`.conf` only, no extra dependencies):
 
 ```bash
-vcpkg install abseil
+# No additional packages needed — cppfig is fully self-contained
 ```
 
 With JSON support:
@@ -322,12 +322,12 @@ cppfig::Configuration<Schema,
                        ThreadPolicy = SingleThreadedPolicy>
 
 // Methods
-auto Load() -> absl::Status;
-auto Save() const -> absl::Status;
+auto Load() -> cppfig::Status;
+auto Save() const -> cppfig::Status;
 auto Get<Setting>() const -> typename Setting::value_type;
-auto Set<Setting>(value) -> absl::Status;
+auto Set<Setting>(value) -> cppfig::Status;
 auto Diff() const -> ConfigDiff;
-auto ValidateAll() const -> absl::Status;
+auto ValidateAll() const -> cppfig::Status;
 auto GetFilePath() const -> std::string_view;
 
 // Thread policies

docs/getting-started.md

@@ -47,7 +47,7 @@ To also enable the optional JSON serializer:
 ### Requirements
 
 - C++20 compatible compiler (GCC 11+, Clang 14+)
-- [Abseil](https://github.com/abseil/abseil-cpp) (for `absl::Status` and `absl::StatusOr`)
+- No external dependencies for the core library
 
 #### Optional Dependencies
 

docs/serializers.md

@@ -109,7 +109,7 @@ struct MyFormatSerializer {
     using data_type = cppfig::Value;
 
     // Required: parse from input stream into a Value tree
-    static auto Parse(std::istream& is) -> absl::StatusOr<cppfig::Value> {
+    static auto Parse(std::istream& is) -> cppfig::StatusOr<cppfig::Value> {
         // ... read and convert to cppfig::Value ...
     }
 
@@ -139,7 +139,7 @@ A serializer must provide:
 | Member | Signature | Purpose |
 |--------|-----------|---------|
 | `data_type` | type alias (`Value`) | Internal data representation |
-| `Parse` | `(std::istream&) → absl::StatusOr<Value>` | Parse from stream |
+| `Parse` | `(std::istream&) → StatusOr<Value>` | Parse from stream |
 | `Stringify` | `(const Value&) → std::string` | Convert to string |
 
 Path navigation (`GetAtPath`, `SetAtPath`, `HasPath`) and merging are handled
@@ -158,7 +158,7 @@ if (result.ok()) {
 }
 
 // Write a Value tree to a file
-absl::Status status = cppfig::WriteFile<cppfig::ConfSerializer>(
+cppfig::Status status = cppfig::WriteFile<cppfig::ConfSerializer>(
     "config.conf", my_data
 );
 ```

docs/testing.md

@@ -141,7 +141,7 @@ TEST(ServiceTest, InitializeLoadsConfig) {
     cppfig::testing::MockVirtualConfigurationProvider mock_config;
 
     EXPECT_CALL(mock_config, Load())
-        .WillOnce(testing::Return(absl::OkStatus()));
+        .WillOnce(testing::Return(cppfig::OkStatus()));
 
     Service service(mock_config);
     EXPECT_NO_THROW(service.Initialize());
@@ -151,7 +151,7 @@ TEST(ServiceTest, InitializeFailsOnLoadError) {
     cppfig::testing::MockVirtualConfigurationProvider mock_config;
 
     EXPECT_CALL(mock_config, Load())
-        .WillOnce(testing::Return(absl::InternalError("File not found")));
+        .WillOnce(testing::Return(cppfig::InternalError("File not found")));
 
     Service service(mock_config);
     EXPECT_THROW(service.Initialize(), std::runtime_error);
@@ -165,10 +165,10 @@ GMock-compatible mock for the virtual interface:
 ```cpp
 class MockVirtualConfigurationProvider : public IConfigurationProviderVirtual {
 public:
-    MOCK_METHOD(absl::Status, Load, (), (override));
-    MOCK_METHOD(absl::Status, Save, (), (const, override));
+    MOCK_METHOD(cppfig::Status, Load, (), (override));
+    MOCK_METHOD(cppfig::Status, Save, (), (const, override));
     MOCK_METHOD(std::string_view, GetFilePath, (), (const, override));
-    MOCK_METHOD(absl::Status, ValidateAll, (), (const, override));
+    MOCK_METHOD(cppfig::Status, ValidateAll, (), (const, override));
     MOCK_METHOD(std::string, GetDiffString, (), (const, override));
 };
 ```