C++

The C++ extractor maps tree-sitter C++ CST nodes to canonical concepts. Class and namespace names come from the standard name field; function names are recovered through the declarator chain.

Detected concepts

tree-sitter node type	Canonical concept
`function_definition`	Function
`class_specifier`	Class
`struct_specifier`	Struct
`enum_specifier`	Enum
`namespace_definition`	Namespace
`declaration` / `field_declaration`	Variable
`template_declaration`	TemplateDeclaration
`template_parameter_list`	TypeParameters
`parameter_declaration`	Parameter
`preproc_include`	PreprocInclude
`access_specifier`	AccessSpecifier

Example

Renaming a method:

old.cpp

class Counter { int total(int n) { return n + 1; } };

new.cpp

class Counter { int sum(int n) { return n + 1; } };

Running differens old.cpp new.cpp:

  ~ renamed function `total` to `sum` in class `Counter`
  ~ changed function `sum` (`total` → `sum`)

Example: change the body

Keep the declaration name and change what it does:

class Counter { int total(int n) { return n + 1; } };

class Counter { int total(int n) { return n + 2; } };

differens body-before.cpp body-after.cpp

  ~ changed function `total` (`1` → `2`)

The report groups the value edit under its containing declaration. Use --format=json to inspect the underlying action and context, or --format=llm for a compact report with source locations.

Known limitations

Preprocessor macros are tokens, not structure; conditional compilation does not expand before diffing.
Templates are diffed as written. The extractor does not expand them or compare compiler-generated instantiations.

Semantic Extractors

Tier Adapters

Detected concepts

Example

Example: change the body

Known limitations