cel

gleam add cel@0.1

import gleam/io

import cel/interpreter
import cel/interpreter/context
import cel/interpreter/value

pub fn main() {
  let source =
    "[a, b, c].map(x, x + 2).filter(x, x > 4)[0] == 5 ? 'wibble' : 'wobble'"

  let ctx =
    interpreter.default_context()
    |> context.insert_variable("a", value.Int(1))
    |> context.insert_variable("b", value.Int(3))
    |> context.insert_variable("c", value.Int(5))

  let assert Ok(program) = interpreter.new(source)
  let assert Ok(value.String(answer)) = interpreter.execute(program, ctx)

  io.println("execution result: " <> answer)
  // execution result: wibble
}

Further documentation can be found at https://hexdocs.pm/cel.

Development

gleam test  # Run the tests