[layout] Move skippy_iter setup from constructor into init()

src/hb-ot-layout-gpos-table.hh

@@ -684,7 +684,8 @@ struct PairPosFormat1
     unsigned int index = (this+coverage).get_coverage  (buffer->cur().codepoint);
     if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
 
-    hb_apply_context_t::skipping_iterator_t skippy_iter (c);
+    hb_apply_context_t::skipping_iterator_t skippy_iter;
+    skippy_iter.init (c);
     skippy_iter.reset (buffer->idx, 1);
     if (!skippy_iter.next ()) return TRACE_RETURN (false);
 
@@ -754,7 +755,8 @@ struct PairPosFormat2
     unsigned int index = (this+coverage).get_coverage  (buffer->cur().codepoint);
     if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
 
-    hb_apply_context_t::skipping_iterator_t skippy_iter (c);
+    hb_apply_context_t::skipping_iterator_t skippy_iter;
+    skippy_iter.init (c);
     skippy_iter.reset (buffer->idx, 1);
     if (!skippy_iter.next ()) return TRACE_RETURN (false);
 
@@ -904,7 +906,8 @@ struct CursivePosFormat1
     const EntryExitRecord &this_record = entryExitRecord[(this+coverage).get_coverage  (buffer->cur().codepoint)];
     if (!this_record.exitAnchor) return TRACE_RETURN (false);
 
-    hb_apply_context_t::skipping_iterator_t skippy_iter (c);
+    hb_apply_context_t::skipping_iterator_t skippy_iter;
+    skippy_iter.init (c);
     skippy_iter.reset (buffer->idx, 1);
     if (!skippy_iter.next ()) return TRACE_RETURN (false);
 
@@ -1048,7 +1051,8 @@ struct MarkBasePosFormat1
     if (likely (mark_index == NOT_COVERED)) return TRACE_RETURN (false);
 
     /* now we search backwards for a non-mark glyph */
-    hb_apply_context_t::skipping_iterator_t skippy_iter (c);
+    hb_apply_context_t::skipping_iterator_t skippy_iter;
+    skippy_iter.init (c);
     skippy_iter.reset (buffer->idx, 1);
     skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
     do {
@@ -1153,7 +1157,8 @@ struct MarkLigPosFormat1
     if (likely (mark_index == NOT_COVERED)) return TRACE_RETURN (false);
 
     /* now we search backwards for a non-mark glyph */
-    hb_apply_context_t::skipping_iterator_t skippy_iter (c);
+    hb_apply_context_t::skipping_iterator_t skippy_iter;
+    skippy_iter.init (c);
     skippy_iter.reset (buffer->idx, 1);
     skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks);
     if (!skippy_iter.prev ()) return TRACE_RETURN (false);
@@ -1270,7 +1275,8 @@ struct MarkMarkPosFormat1
     if (likely (mark1_index == NOT_COVERED)) return TRACE_RETURN (false);
 
     /* now we search backwards for a suitable mark glyph until a non-mark glyph */
-    hb_apply_context_t::skipping_iterator_t skippy_iter (c);
+    hb_apply_context_t::skipping_iterator_t skippy_iter;
+    skippy_iter.init (c);
     skippy_iter.reset (buffer->idx, 1);
     skippy_iter.set_lookup_props (c->lookup_props & ~LookupFlag::IgnoreFlags);
     if (!skippy_iter.prev ()) return TRACE_RETURN (false);

src/hb-ot-layout-gsubgpos-private.hh

@@ -337,23 +337,22 @@ struct hb_apply_context_t
 
   struct skipping_iterator_t
   {
-    inline skipping_iterator_t (hb_apply_context_t *c_,
+    inline void init (hb_apply_context_t *c_, bool context_match = false)
-				bool context_match = false) :
-				 idx (0),
-				 c (c_),
-				 match_glyph_data (NULL),
-				 num_items (0),
-				 end (0)
     {
+      c = c_;
+      match_glyph_data = NULL,
+      matcher.set_match_func (NULL, NULL);
       matcher.set_lookup_props (c->lookup_props);
       /* Ignore ZWNJ if we are matching GSUB context, or matching GPOS. */
       matcher.set_ignore_zwnj (context_match || c->table_index == 1);
       /* Ignore ZWJ if we are matching GSUB context, or matching GPOS, or if asked to. */
       matcher.set_ignore_zwj (context_match || c->table_index == 1 || c->auto_zwj);
-      if (!context_match)
+      matcher.set_mask (context_match ? -1 : c->lookup_mask);
-	matcher.set_mask (c->lookup_mask);
+    }
+    inline void set_lookup_props (unsigned int lookup_props)
+    {
+      matcher.set_lookup_props (lookup_props);
     }
-    inline void set_lookup_props (unsigned int lookup_props) { matcher.set_lookup_props (lookup_props); }
     inline void set_match_func (matcher_t::match_func_t match_func,
 				const void *match_data,
 				const USHORT glyph_data[])
@@ -705,7 +704,8 @@ static inline bool match_input (hb_apply_context_t *c,
 
   hb_buffer_t *buffer = c->buffer;
 
-  hb_apply_context_t::skipping_iterator_t skippy_iter (c);
+  hb_apply_context_t::skipping_iterator_t skippy_iter;
+  skippy_iter.init (c);
   skippy_iter.reset (buffer->idx, count - 1);
   skippy_iter.set_match_func (match_func, match_data, input);
 
@@ -874,7 +874,8 @@ static inline bool match_backtrack (hb_apply_context_t *c,
 {
   TRACE_APPLY (NULL);
 
-  hb_apply_context_t::skipping_iterator_t skippy_iter (c, true);
+  hb_apply_context_t::skipping_iterator_t skippy_iter;
+  skippy_iter.init (c, true);
   skippy_iter.reset (c->buffer->backtrack_len (), count);
   skippy_iter.set_match_func (match_func, match_data, backtrack);
 
@@ -894,7 +895,8 @@ static inline bool match_lookahead (hb_apply_context_t *c,
 {
   TRACE_APPLY (NULL);
 
-  hb_apply_context_t::skipping_iterator_t skippy_iter (c, true);
+  hb_apply_context_t::skipping_iterator_t skippy_iter;
+  skippy_iter.init (c, true);
   skippy_iter.reset (c->buffer->idx + offset - 1, count);
   skippy_iter.set_match_func (match_func, match_data, lookahead);
 

src/hb-ot-shape-fallback.cc

@@ -441,7 +441,8 @@ _hb_ot_shape_fallback_kern (const hb_ot_shape_plan_t *plan,
   OT::hb_apply_context_t c (1, font, buffer);
   c.set_lookup_mask (plan->kern_mask);
   c.set_lookup_props (OT::LookupFlag::IgnoreMarks);
-  OT::hb_apply_context_t::skipping_iterator_t skippy_iter (&c);
+  OT::hb_apply_context_t::skipping_iterator_t skippy_iter;
+  skippy_iter.init (&c);
 
   unsigned int count = buffer->len;
   hb_glyph_info_t *info = buffer->info;