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Matanuska ADR 002 - Architecture
- Matanuska ADR 002 proposes an architecture for a BASIC interpreter in TypeScript.
- The architecture is borrowed from Writing Interactive Compilers & Interpreters and is adjusted to accommodate Matanuska BASIC.
- The interpreter features a Host interface and ConsoleHost implementation for console-specific I/O.
- The Translator component uses a scanner and parser to feed parsed lines to the Editor or to the command module as an immediate command. Both editing and executing programs are accomplished through the shell.
- The Compiler component is responsible for a second pass to ensure proper block closure and resolve GOTOs as well as to resolve variables.
- The Editor component is responsible for taking Lines and editing them into a program. A recreator, combined with a parser, recreates the source code from parsed and compiled bytecode.
- The interpreter features two intermediate representations: the core abstraction stored as a Program and output from the Translator and the bytecode generated from a Program by the Compiler.
- The Commander component is responsible for initializing and closing sessions, executing commands, handling interrupts and errors. It is the common entry point for all command execution.
- The Runtime component is a straightforward bytecode VM.
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