[comp.text.tex] Ligatures

vanadis@cs.dal.ca (Jose Castejon-Amenedo) (01/07/91)

	Can anybody please explain (or give pointers to the
appropriate references) how one gets TeX to recognize ligatures? The
TeXBook mentions that this can be done, but I do not know how?

	Thanks in advance.



JCA
vanadis@cs.dal.ca

marcel@cs.caltech.edu (Marcel van der Goot) (01/08/91)

In <1991Jan6.173724.13631@cs.dal.ca> Jose Castejon-Amenedo
(vanadis@cs.dal.ca) asks:

>	Can anybody please explain (or give pointers to the
> appropriate references) how one gets TeX to recognize ligatures? The
> TeXBook mentions that this can be done, but I do not know how?

TeX always recognizes ligatures, no matter what. Unfortunately, this
is largely outside the control of the user: Which ligatures are
recognized depends on the font, and cannot be changed from TeX (don't
ask me why not). The only (real) way to change the ligatures is
by changing the font definition (or at least the tfm part of the
the font definition). In appendix D Knuth demonstrates how to define
some fake ligatures ('', ``, etc.) (the example about hanging punctuation).

					Marcel van der Goot
					marcel@vlsi.cs.caltech.edu