Function |=

|= symbol value

Modifies the value stored in a variable by performing a binary OR operation with it.

Parameters:

symbol - A symbol object identifying a variable in the current context. The variable must contain a numeric value.

value - A numeric object represeting the value to be binary ORed with the value stored in variable symbol.

Returns:

The new value of the variable.

Modifies the contents of the variable identified by symbol by performing a binary OR between value and the value it had previously stored. The variable binded to symbol is expected to contain an integer object.

The |= is a short way to write

    set! symbol [| $symbol $value]