v1.0.1

• Fix spaceship operator (<=>) cannot be stringified (73fe866)

v1.0.0

• Expressions may now return a boolean value. Consequently, constants may be assigned a boolean value, functions may accept and return a boolean value, and variables may be mapped to a boolean value.
• Implemented comparison operators (> >= < <= <=> == != === !==) (#9) (427e2f4)
• Implemented logical operators (! && || and or xor) (#9) (77f988c)
• Implemented boolean functions (is_bool is_float is_finite is_infinite is_nan boolval intval floatval) (fdcb6ce)

v0.1.30

• Minimum supported PHP version is now 8.1 (06d1e86, 4d21517, 143bc83, c76216c, 04eabbf, 7b2e105, 2ffe7da, a1b8dda, 48d80dc)
• arithmexp now supports virion v3 spec (1255bc5)
• arithmexp now supports PocketMine-MP v5.0.0 (1255bc5, 62c7d51#commitcomment-116175135)

v0.1.29

• Fixed unary positive operation resulting in negation since v0.1.28 (80ceccf)
• Further optimized expression evaluation (6d0c799)
• Implemented modulo operator strength reduction for identity property ((a % n) % n => a % n) (bca7b17, 9853547)
• Removed functions rand() and getrandmax() (these functions exist in PHP only for backward compatibility) (ce8dfb3)
• mt_rand() now accepts zero parameters (in addition to accepting two parameters) (8194bf3, f73be61)
• Implemented mode constants for round() (HALF_UP, HALF_DOWN, HALF_EVEN, HALF_ODD) (c21ce74, 90c0f5d)
• Renamed FunctionRegistry::register() to FunctionRegistry::registerFunction() (ad07641)
• Renamed ConstantRegistry::register() to ConstantRegistry::registerLabel() (1b0d2d5)
• Moved FunctionRegistry::registerMacro() to MacroRegistry::registerFunction() (0d0889f)
• Implemented object-like macros that can be registered by calling MacroRegistry::registerObject() (34e5ad7)

v0.1.28

• Improved performance of evaluating operator tokens (de91e05, 998ec6a, 5b40d3c, 4acfe1d, 3a77909)

v0.1.27

• Implemented function-like macros (see the wiki) (b1fc5c3)

v0.1.26

• Introduced Parser::getOperatorManager() (4ff725f)
  • Replaced Parser::getBinaryOperatorRegistry() with Parser::getOperatorManager()->getBinaryRegistry()
  • Replaced Parser::getUnaryOperatorRegistry() with Parser::getOperatorManager()->getUnaryRegistry()
• Fixed a few cases where optimizers did not account for INF and NAN (#16) (1ef49eb, db1df91, 03440ab, b9dd31e, 3c9b8a0, 14442ca, 082ccf3)
• Fixed operator precedence of unary operators being greater than exponentiation (#17) (4ff725f)
• Fixed division by zero with zero 0 / 0 returning int(0) with optimizations (1672970)
• Function properties (commutativity and determinism) are governed by function flags instead of boolean properties (3e34845)
  • See newer examples on the wiki on registering custom binary operators, unary operators, and functions
• Implemented idempotent functions (bd08609)

v0.1.25

• Fixed a bug that allowed using square brackets and curly brackets to enclose function call argument list (aa71629)
• Errored subexpressions are no longer highlighted if the subexpression is the expression itself (65290a6)
• Improved performance of operator strength reduction by precomputing numeric literals within operands (32cf8f4)

v0.1.24

• Added support for various forms of brackets (square brackets [] and curly brackets {} are now considered as valid in expressions) (#13, thanks @NhanAZ!)

v0.1.23

• Registered functions for a parser can now be accessed via FunctionRegistry::register() (d003841)
• Improved operator strength reduction performance over addition with negative operands (2bf277e, ff81320)
• Improved operator strength reduction performance over subtraction with negative operands (da21685, ff81320)
• Fixed a critical bug where operator strength reduction over subtraction with lvalue=0 resulted in rvalue instead of -rvalue (#11, 4f4aaea, 029e470) (thanks @sylvrs!)