mktables: Arrange to handle 6.1 ScriptExtensions.txt

Unlike 6.0, this property is listed in 6.1's PropValueAliases.txt, so is
automatically created in 6.1.  Thus this needs to be checked for and the
initialization moved out of the constructor.

diff --git a/lib/unicore/mktables b/lib/unicore/mktables
index 83c15d4..3e478e4 100644 (file)
--- a/lib/unicore/mktables
+++ b/lib/unicore/mktables
@@ -11346,13 +11346,13 @@ sub setup_script_extensions {
     # The Script_Extensions property starts out with a clone of the Script
     # property.
 
-    my $sc = property_ref("Script");
-    my $scx = Property->new("scx", Full_Name => "Script_Extensions",
-                  Initialize => $sc,
-                  Default_Map => $sc->default_map,
-                  Pre_Declared_Maps => 0,
-                  Format => $STRING_WHITE_SPACE_LIST,
-                  );
+    my $scx = property_ref("Script_Extensions");
+    $scx = Property->new("scx", Full_Name => "Script_Extensions")
+            if ! defined $scx;
+    $scx->_set_format($STRING_WHITE_SPACE_LIST);
+    $scx->initialize($script);
+    $scx->set_default_map($script->default_map);
+    $scx->set_pre_declared_maps(0);     # PropValueAliases doesn't list these
     $scx->add_comment(join_lines( <<END
 The values for code points that appear in one script are just the same as for
 the 'Script' property.  Likewise the values for those that appear in many
@@ -11363,7 +11363,7 @@ END
     ));
 
     # Make the scx's tables and aliases for them the same as sc's
-    foreach my $table ($sc->tables) {
+    foreach my $table ($script->tables) {
         my $scx_table = $scx->add_match_table($table->name,
                                 Full_Name => $table->full_name);
         foreach my $alias ($table->aliases) {
@@ -15873,6 +15873,9 @@ my @input_file_objects = (
                     Property => 'Script_Extensions',
                     Pre_Handler => \&setup_script_extensions,
                     Each_Line_Handler => \&filter_script_extensions_line,
+                    Has_Missings_Defaults => (($v_version le v6.0.0)
+                                            ? $NO_DEFAULTS
+                                            : $IGNORED),
                     ),
     # The two Indic files are actually available starting in v6.0.0, but their
     # property values are missing from PropValueAliases.txt in that release,