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Jun 2025 (v0.3.3)

Mochi v0.3.3 adds pattern matching and logical operators, expanding the language's expressiveness for control flow and boolean logic.

Pattern Matching​

A new match expression evaluates a target value against a series of patterns and returns the result of the first match. An underscore _ matches any remaining cases.

let label = match x {
  1 => "one"
  2 => "two"
  _ => "other"
}

Match expressions can appear anywhere an expression is allowed, including inside functions and variable declarations.

Logical Operators​

Boolean expressions now support && (and) and || (or) with proper precedence.

if a && b || c {
  print("combined condition")
}

These operators integrate with the type checker and interpreter just like other binary operators.