Ferry is an expression-oriented interpreted functional programming language developed with the aim of being an educational language, both for learning programming as a beginner and for learning how compilers are structured and function. Ferry is meant to be a simple and straightforward language, and while it should be a capable language, producing efficient production-ready code is not a goal of the project.
Clone the repository and then cargo run --release to run the interpreter. You may also install the application to cargo's $PATH by using cargo install --path=..
Invoking ferry with ferry starts the interactive REPL. During the REPL session, you can invoke commands with !. Recognized commands:
!tokens # Prints the generated tokens of last expression
!state # Prints the current REPL state
!ast # Prints the Abstract Syntax Tree
!type # Prints the Abstract Syntax Tree with TYPES
!asm # Prints RISC-V ASM (alpha, has not been fully implemented yet)
!exit # Exit REPL
!quit # Quit REPLIf you have source code in a stand-alone .feri file, you can run it through the interpreter with ferry run [FILE]. The return value of the program will be its last expression evaluated.