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Y++
Y++ (also known as YXX or YLANG++) is a hybrid programming language project developed by theprojectcreatorof2amthoughts. It is implemented using a C11 runtime and a C++20 host, tooling, and native-function bridge.
Y++ is a separate language project related to Ylang. It carries forward Y_'s interpreter and runtime model while providing additional tooling and C++ host interoperability.
Design
Y++ retains its own language vocabulary and syntax rather than replacing its keywords with C or C++ aliases.
Some of its language constructs include:
- stash — variable declarations.
- define — function definitions.
- give — returning values.
- when, doit, else, and done — conditional execution.
- repeatwhile and execute — loop execution.
- escape — control-flow escape.
- writescrn >^ — output.
- errstate <^ — error-state functionality.
- both, either, and invert — logical operations.
- !$name — custom variable names.
- !# directives — compiler and runtime directives.
Runtime
The Y++ runtime supports:
- Numbers, strings, booleans, void, functions, and memory values.
- Nested environments and lexical closures.
- User-defined functions and recursion.
- Conditional statements and loops.
- Checked byte buffers.
- Interactive execution through a persistent prompt.
- Embedded and external library imports.
C++ interoperability
Y++ provides a public C-compatible interface through its bridge header, `include/ypp/bridge.h`.
C++ host applications can register native functions that can subsequently be called from Y++ source code. Supported bridge values include void, numbers, strings, and booleans.
This functionality provides a native-function bridge. It is not a general-purpose C++ parser or automatic C++ binding generator.
File formats
The repository currently documents these file formats:
- `.ycpp` — Y++ source programs.
- `.hlypp` — Y++ header libraries.
- `.yaq` — external Adequit helper files.
Compilers and tools
Y++ includes two main executables:
- `ylang++` — the interpreter and interactive runtime.
- `gy++` — the native compiler driver, which embeds Y++ source and links it with the Y++ runtime.
The project supports building with GNU Make and CMake.