Primi 0.2.2

• NEW: Logical operators.
  • Implemented and, or and proper ! negation operators.
    • Added helper Common::isTruthy() for having a single point of
      truth for value's truthyness.
  • Precedence of operators is defined as follows (high to low):
    • (...)
    • !
    • *, /
    • +, -
    • ==, !=, >=, <=, >, <
    • and
    • or
• FIX: Fixed error in array_shuffle() function. …
  • It did not operate on copy of the array. It does now.
• FIX: Fixed error when getting argument count for error message.
• Pretty major refactoring.
  • Introduced left-to-right evaluation helpers.
    • Supports short-circuiting.
  • Introduced left-to-right comparion evaluation helper.
    • Uses short-circuiting.
  • Many places where we relied on PHP's internal boolean-evaluation logic
    were now refactored to use our Common::isTruthy() helper.
  • There was an attempt to normalize number-bool comparison.
• Tests now support pragma comments, eg. // pragma:one_liners
  • This pragma (compilator/interpreter directive) forces the test runner to evaluate each line of the test as if it were standalone script.
    • That enables us to test exceptions better (thrown Primi's error exception no longer terminates the whole test suite.)
  • This leads to improved test coverage.