is_const : term -> bool

SYNOPSIS

Tests a term to see if it is a constant.

DESCRIPTION

is_const `const:ty` returns true. If the term is not a constant the result is false.

FAILURE CONDITIONS

Never fails.

EXAMPLE

  # is_const `T`;;
  val it : bool = true
  # is_const `x:bool`;;
  val it : bool = false

Note that numerals are not constants; they are composite constructs hidden by prettyprinting:

  # is_const `0`;;
  val it : bool = false
  # is_numeral `12345`;;
  val it : bool = true