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| author | Andreas Scherer <andreas_tex@freenet.de> | 2020-08-01 14:27:00 +0000 |
|---|---|---|
| committer | Andreas Scherer <andreas_tex@freenet.de> | 2020-08-01 14:27:00 +0000 |
| commit | d15614d79be6264bf014c5d5c4713280329fcae9 (patch) | |
| tree | 23720ff104acbef78d9c7dbf39b3b73ec8f5a13e /Build/source/texk/web2c/patgen.ch | |
| parent | 2b48c58a3269e00f95e2769500c0230b2b7f397a (diff) | |
Purge more 'goto' and 'jump_out' leftovers.
Editor's note: Trying to make the WEB changefiles fully represent the
actual codes as modified for Web2c/TeX Live is like opening a veritable
can of worms.
git-svn-id: svn://tug.org/texlive/trunk@56014 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/patgen.ch')
| -rw-r--r-- | Build/source/texk/web2c/patgen.ch | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/patgen.ch b/Build/source/texk/web2c/patgen.ch index 4a8c177d2fb..3d9054a446d 100644 --- a/Build/source/texk/web2c/patgen.ch +++ b/Build/source/texk/web2c/patgen.ch @@ -58,7 +58,22 @@ begin print_ln (version_string); @z +@x [10] Purge 'jump_out' and 'end_of_PATGEN'. +error message about what caused the error. Such errors might be +discovered inside of subroutines inside of subroutines, so a \.{WEB} +macro called |jump_out| has been introduced. This macro, which transfers +control to the label |end_of_PATGEN| at the end of the program, contains +the only non-local |@!goto| statement in \.{PATGEN}. Some \PASCAL\ +compilers do not implement non-local |goto| statements. In such cases +the |goto end_of_PATGEN| in the definition of |jump_out| should simply +be replaced by a call on some system procedure that quietly terminates +the program. +@y +error message about what caused the error. +@z @x Error handling +@d jump_out==goto end_of_PATGEN {terminates \.{PATGEN}} +@# @d error(#)==begin print_ln(#); jump_out; end @y @d error(#)==begin write_ln(stderr, #); uexit(1); end; |