Added function creation support

Full Changelog: v0.12.0...v0.13.0

Added

• Function creation support (no arguments).
• Unknown names now raise errors.

Changed

• (dev notes): Migrated to clap API.

Added slicing, `quit/exit` functions, fixed bugs

Full Changelog: v0.11.0...v0.12.0

Added

• Slicing of arrays and strings (store in variable first).
• quit and exit functions to immediately terminate the program with an optional code.

Changed

• run_tokens now returns a Result to provide a base for the upcoming feature of error handling.

Fixed

• Fixed bug where commas in in strings were evaluated as separators.
• Errors in lexer now print on the correct line.

Added arrays

Full Changelog: v0.10.0...v0.11.0

Added

• Arrays
• Array pretty-print function (format_array)

Changed

• Literals now return the value provided (if there is no function or operator involved) instead of None.

Removed

• Unnecessary match in say and short_say functions.

Added byte code compiler + runner

Full Changelog: v0.9.0...v0.10.0

Added

• Variable-options in CLI
• Bytecode compiler and runner (level 1)
• Better documentation in CLI.

Changed

• Now there are two runner functions: run_tokens and run (which tokenizes the line and calls run_tokens with the tokens)
• Integers are now i64 and floats are f64

Added more operators, functions, examples

Full Changelog: v0.8.0...v0.9.0

Added

• !=, lazy= and lazy!= operators
• vars function which prints all the variables
• int and float converter functions
• Guessing game example to README.md

Changed

• Changed the example in README.md.

Fixed

• Scope build-up bug has now been fixed

Added nested loops, `break` and scope return

Full Changelog: v0.7.0...v0.8.0

Added

• Nested scopes
• break statement
• Scopes and if statements now return the value of the last statement.

Added more loops, operators

Full Changelog: v0.6.1...v0.7.0

Added

• while and until loops
• ==, > and < compare operators
• +=, -=, *= and /= "operate and assign" operators
• Functions now say their name on error.

Fixed variable arithmetic bug

Full Changelog: v0.6.0...v0.6.1

Fixed

• Bug where variables can't be used with operators

Added boolean and `if` block

Full Changelog: v0.5.0...v0.6.0

Added

• Boolean type (true and false)
• if function

Fixed

• Fixed bug where two arguments cannot be provided to scope-accepting function.

Updated change log

Full Changelog: v0.4.0...v0.5.0

Changed

• The change log has been remodeled.