Peri.dot (Pre-06)

Peri.dot is a strongly typed interpreted language, with type inference, implemented in Python. The file extension is ".peri"

Setup

This project uses poetry for dependency management.

git clone https://github.com/toto-bird/Peri.dot.git
cd Peri.dot
poetry install

Usage

python peridot file.peri

Documentation

Peri.dot Language Docs

Running Unit Tests

Unit tests expect pytest. (pip install pytest) From the top level directory pytest

Current Features

• Basic REPL
• Types:
  • Null/None: Null
  • Numbers: Int, Float
  • Strings: Str
  • Arrays: Array
  • Tuples: Tuple
  • Dictionaries: Dict
  • Booleans: Bool
  • Functions: Function
  • Built-in functions: Built-In Function
  • Exceptions: Exception
  • Ids: Id
  • Namespaces: Namespace
• Types must be explicitely cast:
  • 1 + 1 -> 2
  • 1 + 1.0 -> OperationError('Float can not be added to Int')
• Including other files: var operations = include('./operations.peri')
• Variables:
  • Creation/Initialization: var x = 2
  • Assignment: x = 5
  • Accessing: x
• Arithmetic:
  • Addition: 1 + 2
  • Subtraction: 5 - 1
  • Multiplication: 10 * 2
  • Division: 25 / 5
  • Exponents: 2 ^ 3
• Global comparisons:
  • Equals: ==
  • Not Equals: !=
• Numeric comparisons:
  • Greater than: >
  • Less than: <
  • Greater than or equal to: >=
  • Less than or equal to <=
• Boolean operations: and, or and not
• Functions:
  • Creation: var add = func(a, b) {a + b}
  • Calling: add(2, 6)
• Built-In Functions:
  • Printing to console: print('Hello World!')
  • Testing: assert(x == 10, 'x is not 10')
• Exception handler: var x = handler {10 / 0}
• Assert / in-peri.dot testing: assert(x == 9, 'x is not equal to 9')
• Flow control:
  • If statements: if (x == 1) {var y = 3} elif (x == 2) {var y = 2} else {var y = 1}
  • Switch statements: switch (var x in a) {case (x == 10) {print('10')} else {print('Hmm...')}}
  • For loops: for (var i in [True, True, False]) {print(i)}
  • While loops: while (x < 100) {x = x + 1}

Coming Soon

• Improved repl
• Classes for general use: var Test = class() {a = 'hello'}

Possible Features

• Formatted strings 'Hello World{suffix}'
• More operations:
  • Add and assign +=
  • Subtract and assign -= etc.