Comma Separated Type Declaration Fatal Error "=" expected but "," found Free Pascal

Question

I am learning Pascal using Free Pascal and VS Code. A compilation error occurs from a simple type declaration. I have looked at tutorials and books and the syntax seems good. If I remove "days," making it a single declaration it works fine. What am I missing? Thanks in advance.

program Test;

uses crt;

type
days, age = integer; {Fatal: Syntax error, "=" expected but "," found}

var
myAge: age;

begin
   myAge := 5;
   writeln(myAge);
end.

Answer 1

Your syntax is wrong, see the syntax diagram at the beginning of the Free Pascal Language Reference, Chapter 3 Types:

and Chapter 3.8 Type aliases:

As you can see, the syntax for a Free Pascal type alias in a Type block is:

1. A new identifier followed by
2. = (equals sign) followed by
3. the keyword type (optional, to declare a new type instead of an alias)
4. the identifier of an existing type followed by
5. ; (semicolon)

So, the correct way to express what you want would be something like this:

program Test;

uses crt;

type
   days = integer;
   age = integer;

var
   myAge: age;

begin
   myAge := 5;
   writeln(myAge);
end.

I have looked at tutorials and books and the syntax seems good.

Well, as you can see from the documentation of the language you are writing in, it isn't.

What am I missing?

You probably did not look at the documentation of Free Pascal but some other language.