info-look libc constants positioning [patch]

info-look libc constants positioning [patch]

[Kevin Ryde]

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In the glibc manual various constants are given with @table, but
info-look doesn't recognise that when positioning point within the
node it goes to.  Eg. in a c-mode buffer,

	M-x info-lookup-symbol DBL_MAX Ret

brings up the Floating Point Parameters node, but positioned only at
the top, not where DBL_MAX is described.


2004-12-25  Kevin Ryde  <user42@zip.com.au>

        * info-look.el (c-mode (libc)Variable Index): Add ^` to prefix, and
        change suffix to space, $ or '$, to correctly position point when
        going to @table style constants like DBL_MAX.


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*** info-look.el.~1.45.~	Thu Dec 23 08:11:50 2004
--- info-look.el	Mon Dec 27 07:58:57 2004
***************
*** 634,641 ****
   :regexp "\\(struct \\|union \\|enum \\)?[_a-zA-Z][_a-zA-Z0-9]*"
   :doc-spec '(("(libc)Function Index" nil
  	      "^[ \t]+-+ \\(Function\\|Macro\\): .*\\<" "\\>")
  	     ("(libc)Variable Index" nil
! 	      "^[ \t]+-+ \\(Variable\\|Macro\\): .*\\<" "\\>")
  	     ("(libc)Type Index" nil
  	      "^[ \t]+-+ Data Type: \\<" "\\>")
  	     ("(termcap)Var Index" nil
--- 634,648 ----
   :regexp "\\(struct \\|union \\|enum \\)?[_a-zA-Z][_a-zA-Z0-9]*"
   :doc-spec '(("(libc)Function Index" nil
  	      "^[ \t]+-+ \\(Function\\|Macro\\): .*\\<" "\\>")
+              ;; prefix/suffix has to match things like
+              ;;   " -- Macro: int F_DUPFD"
+              ;;   " -- Variable: char * tzname [2]"
+              ;;   "`DBL_MAX'"    (texinfo @table)
+              ;; suffix "\\>" is not used because that sends DBL_MAX to
+              ;; DBL_MAX_EXP ("_" is a non-word char)
  	     ("(libc)Variable Index" nil
!               "^\\([ \t]+-+ \\(Variable\\|Macro\\): .*\\<\\|`\\)"
!               "\\( \\|'?$\\)")
  	     ("(libc)Type Index" nil
  	      "^[ \t]+-+ Data Type: \\<" "\\>")
  	     ("(termcap)Var Index" nil

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