This is a toy interpreter for the panda programming language. It has a AST Tree walker based evaluater as well as a Compiler + VM structure. It is superficially based on the monkey programming language.
var hello = "Hello,";
var world = "World!";
print(hello, world); // Output: Hello, World!
- Mutable and Immutable variables. Immutable variables use
constkeyword. - Added Assignment Expressions.
IDENTIFIER's,INDEX_EXPRESSION's andMETHOD_EXPRESSIONS's can be assigned to - Added
CHARdata type based on rust'schar - Added
whileandforloops. - Added a few new builtin functions.
- Added the
nilkeyword and its equality comparison with others - Added function statement in
fn <IDENT>(<ARGUMENTS>) <BODY>format. - Added
FLOATdata-type based on rust'sf64 - Added bitwise operators
>>,<<,&,|,^and boolean operators&&and||(These two are valid for all data types and are short-circuit evaluated). STR's are aVec<char>instead of standardString/&stras it makes manipulation easier.- Changed
is_truthy()evaluation criteria and makin it similar topython's implementation with empty strings, arrays and hashes as well zero (both forINTandFLOAT) beingfalsey. - Restricted allowed types inside arrays.
- Added rust style range expression using
..with reverse, negative and step support in the format<EXPR>..<EXPR>[..<EXPR>]. - Added
STRandARRAYslicing usingRANGE. - Added a simple type system.
- Added
importstatements and scope expressions using::for accessing module members. - Added
STRandCHARcharacter escaping. - Added nil variable declaration i.e. declaring variable without any value.
- Added
deletestatement to remove variables
- List all the
featuresin the above section. - Finalize a formal grammar for future reference.
- Create a standard library for use in import systems.
- Add a type system with more features like runtime type checking (i.e. wrapping rust
Objectsinside panda'sstdtypes). - Write tests for every
ASTandObject.