Rebol is another homoiconic language that has infix operators: >> 1 + 2 * 3 == 9 The Rebol interpreter see this as: >> multiply add 1 2 3 == 9 Func

Rebol is another homoiconic language that has infix operators: >> 1 + 2 * 3 == 9 The Rebol interpreter see this as: >> multiply add 1 2 3 == 9 Functions in Rebol have fixed arity, both add and multiple take two arguments. You can express the above with parens if you want to make it clearer: >> multiply (add 1 2) 3 == 9 Rebols infix operators have no precedence they just work left to right (like Smalltalk). Use parens where needed! >> 1 + (2 * 3) == 7