doc-src/Codegen/Thy/examples/arbitrary.ML

declare inner_add, inner_diff [algebra_simps]; declare inner_scaleR [simp]

structure Codegen = 
struct

val arbitrary_option : 'a option = NONE;

fun dummy_option [] = arbitrary_option
  | dummy_option (x :: xs) = SOME x;

end; (*struct Codegen*)