const name string = "Bob"
Constant declaration
A constant is introduced with the const keyword.
A simple constant declaration looks like this:
Type inference is supported. If the constant’s type is not explicitly declared then the compiler infers it from the expression at the right of the = symbol. Hence the above instruction is equivalent to the following one:
const name = "Bob"
After a constant has been declared, no other object can be assigned to it (e.g. writing name = "Alice" after the above instruction is invalid).
However, in case of types with mutable attributes the object’s data can change (e.g. if a customer’s address attribute is variable, then the value of address can change after the customer object has been assigned to a constant).
The value assigned to the constant is defined by an expression of arbitrary complexity. Example:
const function_should_be_refactored = \
function.lines >= 20 and \
function.max_indent >= 5
The scope of a constant is limited to the block of instructions in which it is declared.