Basic interpreter written in Rust, not following any particular guides or languages. This is just a fun little project and is not too serious, but all the tests pass. It uses a basic recursive descent parser, but I would like to rewrite it using a grammar such as pest.rs or a parser combinator like nom.
- Arithmetic, e.g.
3 + 4 * 2 - Boolean operations, e.g.
true || !false - Relational operations, e.g.
4 >= 3 - Variable assignment, e.g.
let x = 3 - Scoping, e.g.
{ let x = 3; x } => 3 - Shadowing, e.g.
{ let x = 3; { let x = 4 }; x } => 3 - Branching, e.g.
if 4 >= 3 then { 1 } else { 2 } - Lists, e.g.
[0, 1, 2, 3]
- Statements as expressions, e.g.
ifand{ }(not doing this was just an oversight) - Variable re-assignment, e.g.
{ let x = 3; x = 4; x } => 4 - Pre/post-fix operations, e.g.
{ let x = 1; x++; --x; x += 2; x } => 3 - Loops, e.g.
for x in [0, 1, 2, 3] { x }orfor x = 0; x <= 5; x += 1 { x } - Functions, e.g.
{ fn foo(x) { x + 3 }; foo(1) } => 4