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Procedure statements
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Procedure statements are calls to subroutines. There are different possibilities for procedure calls:
A normal procedure call.
An object method call (fully qualified or not).
Or even a call to a procedural type variable.
All types are present in the following diagram:
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Procedure statements
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The Free Pascal compiler will look for a procedure with the same name as given in the procedure statement, and with a declared parameter list that matches the actual parameter list. The following are valid procedure statements:
Usage;
WriteLn('Pascal is an easy language !');
Doit();
Remark When looking for a function that matches the parameter list of the call, the parameter types should be assignment-compatible for value and const parameters, and should match exactly for parameters that are passed by reference.