URL:
<https://savannah.gnu.org/support/?110929>
Summary: Using changequote() breaks --synclines
Group: GNU M4
Submitter: kop
Submitted: Wed 06 Sep 2023 05:14:08 AM UTC
Category: None
Priority: 5 - Normal
Severity: 3 - Normal
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Operating System: None
_______________________________________________________
Follow-up Comments:
-------------------------------------------------------
Date: Wed 06 Sep 2023 05:14:08 AM UTC By: Karl O. Pinc <kop>
Using the changequote() macro breaks --synclines output.
(And has for years and years, FWIW.)
See the attached files foo.m4 and bar.m4 and output of:
m4 -s foo.m4
Full explaination follows:
-----------------------------------------------------
foo.m4 is:
line 1 of foo
include(bar.m4)
line 3 of foo
include(bar.m4)
line 5 of foo
line 6 of foo
baz()`'dnl
This text is line 8 of foo
baz()
line 10 of foo
-----------------------------------------------------
bar.m4 is:
-----------------------------------------------------
dnl This is an included file
changequote([{[,]}])dnl m4 foolery so includes include only once.
dnl Once the macro is in the text, change the quotes back
ifdef([{[_bar.m4]}], [{[changequote(`,')]}], [{[dnl
changequote(`,')dnl
dnl
dnl Standard test for having already included the file.
define(`_bar.m4')dnl
dnl (Start putting things into the file here)
line 10 of bar
dnl
dnl Don't output anything while defining macros.
line 13 of bar
divert(-1)
# The utility of the changequote foolery is for when included files
# include other files.
# line 18 of bar
define(`baz',
`The 'b``''`az macro made this')
# Done defining macros.
divert`'dnl
line 25 of bar
]}])dnl End of ifdef over the whole file.
-----------------------------------------------------
The output of `m4 -s foo.m4` is:
-----------------------------------------------------
#line 1 "foo.m4"
line 1 of foo
#line 4 "bar.m4"
line 10 of bar
#line 4
line 13 of bar
#line 4 "bar.m4"
line 25 of bar
#line 2 "foo.m4"
line 3 of foo
#line 4 "foo.m4"
line 5 of foo
line 6 of foo
The baz macro made this This text is line 8 of foo
#line 9
The baz macro made this
line 10 of foo
-----------------------------------------------------
The output should be (something like):
-----------------------------------------------------
#line 1 "foo.m4"
line 1 of foo
#line 10 "bar.m4"
line 10 of bar
#line 13
line 13 of bar
#line 25 "bar.m4"
line 25 of bar
#line 2 "foo.m4"
#line 3
line 3 of foo
#line 4 "foo.m4"
#line 5
line 5 of foo
#line 6
line 6 of foo
The baz macro made this This text is line 8 of foo
#line 21 "bar.m4"
The baz macro made this
#line 10 "foo.m4"
line 10 of foo
-----------------------------------------------------
Apologies, the example may be over-complicated.
It should at least involve direct output by included
files as well as use of a macro defined in an included file.
(I opted not to show included files including other files, but
that should work too.)
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Wed 06 Sep 2023 05:14:08 AM UTC Name: foo.m4 Size: 148B By: kop
Use thse to reproduce with: m4 -s foo.m4
<http://savannah.gnu.org/support/download.php?file_id=55118>
-------------------------------------------------------
Date: Wed 06 Sep 2023 05:14:08 AM UTC Name: bar.m4 Size: 724B By: kop
Use thse to reproduce with: m4 -s foo.m4
<http://savannah.gnu.org/support/download.php?file_id=55119>
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/support/?110929>
_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/
