This is a tree-walk interpretation implementation of Iqalox language in Python. It is a proof of concept preceding the proper bytecode compiler implementation.
"Iqalox" is a play on the Kalaallisut word for Arctic char, Eqaluk, and Lox from Bob Nystrom's Crafting Interpreters. The language presented here is based on Nystrom's Lox but mutated and extended to suit the author's preferences and interests.
You will find the syntax grammar in langspec. The lexical grammar and precedence rules are presented below.
Please note: Iqalox is in planning phase, so no implementation has been written as of yet.
NUMBER → DIGIT+ ( "." DIGIT+ )? ;
STRING → '"' <any char except '"'>* '"' | "'" <any char except "'">* "'" ;
IDENTIFIER → ALPHA ( ALPHA | DIGIT )* ;
ALPHA → 'a' ... 'z' | 'A' ... 'Z' | '_' ;
DIGIT → '0' ... '9' ;
| Name | Operators | Associates |
|---|---|---|
| Unary | ! - |
Right |
| Increment | ++ -- |
Right |
| Multiplication | / * % |
Left |
| Addition | - + |
Left |
| Comparison | > >= < <= |
Left |
| Equality | == != |
Left |
| Ternary | ? : |
Right |
| Comma | , |
Left |