Passes ruby/spec
Ruby 4.x,
written in Rust.
Meta Object Runtime Execution
Metorex runs Ruby 4.x programs, and it exposes a method's syntax tree as objects your program can read at runtime.
Point = Struct.new(:x, :y) do
def +(other) = Point.new(x + other.x, y + other.y)
end
points = [Point.new(1, 2), Point.new(3, 4)]
total = points.sum(Point.new(0, 0))
puts total.inspect
case total
in { x: Integer => x, y: } if y > x
puts "y leads by #{y - x}"
end$ metorex example.rb
#<struct Point x=4, y=6>
y leads by 2Features
What Metorex Does Today
Ruby 4.x Syntax
Metorex reads Ruby 4.x source with its own lexer and parser. RUBY_VERSION reports the MRI release it follows.
Code as Objects
A method's body is available at runtime as syntax tree nodes you can inspect.
Read a Method's Tree →Built-In Test Runner
metorex test finds and runs the *_test.rb, test_*.rb, and *_spec.rb files under test/.
Metorex passes the ruby/spec suite.
Every spec in core, library, language, command_line, optional, and security runs in CI. If a program behaves differently under Metorex than under MRI, open an issue with the program and both outputs.