Re: forward references

[Valery Ushakov]

On Fri, Oct 20, 2017 at 11:28:00 -0700, kevinbanjo wrote:

> Hi, I'm trying to do a letter template that incorporates a footer
> which includes the sender's name and an abbreviated of the
> "regarding" field (see attached) but its giving me errors such
> things are not yet defined.  How do I tell lout to use my values
> when it doesn't/can't know them yet?

Lout standard packages use "galleys" for this.  I'm afraid that
requires reading the relevant parts of the Expert's Guide.

You can also find a couple of short examples of scoping rules in my
very old mails:

http://www.stderr.spb.ru/~uwe/lout/essays/496.scoping.txt
http://www.stderr.spb.ru/~uwe/lout/essays/636.scoping.txt

In your specific case you can probably use something like the
following.  Invoke @Document inside your @MyLetter definition in a
context that you control with @Open, then you can pass the values from
@MyLetter parameters to @OddTop &c directly.


# ----8<-- LegalLetterMailPS.lt ----8<-----
@SysInclude { doc }

def @MyLetter
  named @ShortRe {}
  body @Body
@Begin
  {
    @BasicSetup
      @InitialFont { Helvetica Base 24p }
  }
  @Open {
    {
      @DocumentSetup
        @EvenFoot { @ShortRe }
        @OddFoot  { @Right @ShortRe }
    }
    @Open {
      {
        @OrdinarySetup
      }
      @Open {
        @Document
      }
    }
  }
//
@Text
@Begin
@Heading { Some Fixed Text }
//
@Body
//
@Display { More Fixed Text }
@End @Text
@End @MyLetter

# ----8<-- letter.lt ----8<-----
# @Include { LegalLetterMailPS }

@MyLetter
  @ShortRe { My rights }
@Begin
@Display { Hello ! }
@PP Sample Text.
@NP New page
@End @MyLetter


-uwe