7.5 Constants

constant::=integer-literal
∣ int32-literal
∣ int64-literal
∣ nativeint-literal
∣ float-literal
∣ char-literal
∣ string-literal
∣ constr
∣ false
∣ true
∣ ()
∣ begin end
∣ []
∣ [||]
∣ `tag-name

See also the following language extension:extension literals.

The syntactic class of constants comprises literals from the fourbase types (integers, floating-point numbers, characters, characterstrings), the integer variants, and constant constructorsfrom both normal and polymorphic variants, as well as the specialconstants false, true, (),[], and [||], which behave like constant constructors, andbeginend, which is equivalent to ().