The Manse Programming Language

We are reading Crafting Interpreters at Reaktor Tampere book club. This language is heavily influenced by that book, except written in a good programming language.

Manse is a C-family style dynamically typed, interpreted language whose syntax resembles the regional dialect of Tampere, Finland.

Current features:

Variable declaration: seonnääs nii et VARIABLE_NAME on ny VARIABLE_VALUE;
Variable reassignment: VARIABLE_NAME on ny VARIABLE_VALUE;
If statements: jos (CONDITION) ni {} mut jos ei ni {})
While loops: kuha (CONDITION) ni {}
For loops: elikkä jos (EXPRESSION_OR_DECLARATION; CONDITION; EXPRESSION) {}
Functions: roseduuri FUNCTION_NAME(arg1, arg2) { kylä lähtee arg1 plus arg2; }
Block scoped variables
First class functions and closures
Recursion

TODO:

Better docs
Better, non-horrible error messages
Fix a million edge cases, probably
Moar tests
Moar features
REPL

Example Manse file:

roseduuri getClosure() {
    seonnääs nii et x on ny 3;

    roseduuri double() {
        kylä lähtee x kertaa 2;
    }

    kylä lähtee double;
}

roseduuri pää() {
    seonnääs nii et funcWithClosure on ny getClosure();

    kylä lähtee funcWithClosure();
}

Requirements:

Stack build tool for Haskell

To run tests:

stack test

To run a Manse file:

stack run <path-to-file>