(Q_subscript_of): New variable.

(put_char_composition): Return `<-subscript' instead of
`=decomposition' for compatibility mapping to single character tagged
`sub'.
(Fput_char_attribute): Convert char-specs in value of
`{<-|->}subscript[^*]*' to characters and put reverse links.
(Fsave_char_attribute_table): Use `Fchar_refs_simplify_char_specs' for
`<-subscript'.
(syms_of_chartab): Add new symbol `<-subscript'.

diff --git a/src/chartab.c b/src/chartab.c
index 63c9fe8..71909ed 100644 (file)
--- a/src/chartab.c
+++ b/src/chartab.c
@@ -1134,6 +1134,7 @@ Lisp_Object Qmap_decomposition;
 Lisp_Object Qto_decomposition_at_superscript;
 Lisp_Object Q_canonical;
 Lisp_Object Q_superscript_of;
+Lisp_Object Q_subscript_of;
 Lisp_Object Q_compat_of;
 Lisp_Object Q_decomposition;
 Lisp_Object Q_identical;
@@ -3431,6 +3432,8 @@ put_char_composition (Lisp_Object character, Lisp_Object value)
            }
          else if (EQ (base, Qsuper))
            return Q_superscript_of;
+         else if (EQ (base, Qsub))
+           return Q_subscript_of;
          else if (EQ (base, Qcompat))
            return Q_compat_of;
        }
@@ -3540,13 +3543,14 @@ Store CHARACTER's ATTRIBUTE with VALUE.
        EQ (attribute, Q_identical_from)                ||
        EQ (attribute, Q_canonical)             ||
        EQ (attribute, Q_superscript_of)                ||
+       EQ (attribute, Q_subscript_of)          ||
        EQ (attribute, Q_compat_of)             ||
        EQ (attribute, Q_component)             ||
        EQ (attribute, Q_component_of)          ||
        !NILP (Fstring_match
              (build_string ("^\\(<-\\|->\\)\\("
                             "canonical"
-                            "\\|superscript\\|compat"
+                            "\\|superscript\\|subscript\\|compat"
                             "\\|fullwidth\\|halfwidth"
                             "\\|simplified\\|vulgar\\|wrong"
                             "\\|same\\|original\\|ancient"
@@ -3897,6 +3901,7 @@ Save values of ATTRIBUTE into database file.
                EQ (attribute, Q_identical_from)        ||
                EQ (attribute, Q_canonical)             ||
                EQ (attribute, Q_superscript_of)        ||
+               EQ (attribute, Q_subscript_of)          ||
                EQ (attribute, Q_compat_of)             ||
                !NILP (Fstring_match
                       (build_string ("^\\(<-\\|->\\)\\(simplified"
@@ -4684,6 +4689,7 @@ syms_of_chartab (void)
             "=>decomposition@superscript");
   defsymbol (&Q_canonical,             "->canonical");
   defsymbol (&Q_superscript_of,                "<-superscript");
+  defsymbol (&Q_subscript_of,          "<-subscript");
   defsymbol (&Q_compat_of,             "<-compat");
   defsymbol (&Q_decomposition,         "->decomposition");
   defsymbol (&Qcompat,                 "compat");