shl

Synopsis

     operator shl (operand1, operand2: integer_type) = Result: integer_type;

or

     procedure shl (var operand1: integer_type; operand2: integer_type);

Description

In GNU Pascal, shl has two built-in meanings:

1. Bitwise shift left of an integer-type expression by another integer value. The result is of the type of the first operand.
2. Use as a “procedure”: operand1 is shifted left by operand2; the result is stored in operand1.

Conforming to

shl is a Borland Pascal extension.

Use of shl as a “procedure” is a GNU Pascal extension.

Example

     program ShlDemo;
     var
       a: Integer;
     begin
       a := 1 shl 7;  { yields 128 = 2 pow 7 }
       shl (a, 4)  { same as `a := a shl 4' }
     end.

See also

Keywords, shr, Operators.