Penguin

Penguin programming language

Getting started

You have to compile all files from src/

You can run scripts/make.cmd (for Windows) or scripts/make.sh (for Linux) to do that or use CMakeLists.txt

Usage

Penguin path/to/program.peng

Examples

See examples at examples/

Usage:

• Penguin examples/local-scopes/main.peng
• Penguin examples/power-of-two-loops/main.peng < examples/power-of-two-loops/in/1.in

Tests

You can run tests with scripts/tests.bat or scripts/tests.sh

For a full test run (unit tests for core modules + example-based integration checks) use:

make run_tests

Docs

• Grammar (Google Docs) / Grammar (Repo docs)
• Types of tokens (Google Sheets) / Types of tokens (Repo docs)
• Priority of operations (Google Sheets) / Priority of operations (Repo docs)

Description

• Variable types
  • int: 1, -5, 0 - int a = 7;
  • double: 0.2, .4, .5e2, 7.3E-5 - doule b = 1.0e-3;
  • string: "Hello World!" - string c = "teststring";
  • bool: true, false - bool d = true;
• Operators
  • Logical operators: and, or, xor
  • Comparison operators: >, <, >=, <=, ==, !=
  • Mathematical operators: +, -, *, /, %, ** (power), ++ (prefix), -- (prefix)
  • Assignments operators: =
• Comments
  • /* ... */
• Functions
  • bool isEven(int a) { return a % 2 == 0; }
  • Function operators: return
  • All functions are in global scope by default

    null main() { write(isEven(10)); }
    bool isEven(int a) { return a % 2 == 0; }
    /* No need to place a function before its usage */

• Cycles
  • for: for (int i = 0; i < 10; ++i) { ... }
  • while: while (i < 5) { ... }
  • Cycle operators: break, continue
• Conditional operators:
  • if (x > 5) { ... }
  • else if (x < 2) { ... }
  • else { ... }
• Built-in functions
  • read(a, b);
  • write(x, " + ", y, " = ", x + y);
• Local scopes
  examples/local-scopes/main.peng:

  null main() {
      int a;
      read(a);
      if (a > 2) {
          string a = "str";
          write(a);
      } else {
          bool a = true;
          write(a);
      }
      write(a + 2);
  }