Ys (pronounced "Wise") is a simple language written in Go.
The project is structured as follows:
main.go: This is the entry point of the application.ast/: This directory contains files related to the Abstract Syntax Tree (AST) that represents the structure of Ys programs.ast.go: Defines the structures of the AST.ast_test.go: Contains unit tests for the AST.
evaluator/: This directory contains files related to the evaluation of Ys programs.builtins.go: Defines built-in functions.evaluator.go: Contains the logic for evaluating nodes of the AST.evaluator_test.go: Contains unit tests for the evaluator.
lexer/: This directory contains files related to the lexical analysis of Ys programs.lexer.go: Contains the logic for breaking down Ys programs into tokens.lexer_test.go: Contains unit tests for the lexer.
object/: This directory contains files related to the objects that Ys programs manipulate.environment.go: Defines the environment in which Ys programs run.object.go: Defines the structures of objects.object_test.go: Contains unit tests for the objects.
parser/: This directory contains files related to the parsing of Ys programs.parser.go: Contains the logic for parsing tokens into an AST.parser_test.go: Contains unit tests for the parser.parser_tracing.go: Contains utility functions for tracing the parser's progress (useful for debugging).
repl/: This directory contains files related to the Read-Eval-Print Loop (REPL) of Ys.repl.go: Contains the logic for the REPL.
token/: This directory contains files related to the tokens that the lexer produces.token.go: Defines the types of tokens.
To build the project, run the build.sh script. This will produce an executable that you can run to start the REPL and interact with the Ys language.