[OTLayout] Remove operator() from ClassDef

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

@@ -754,8 +754,6 @@ struct ClassDefFormat2
 
 struct ClassDef
 {
-  inline unsigned int operator () (hb_codepoint_t glyph_id) const { return get_class (glyph_id); }
-
   inline unsigned int get_class (hb_codepoint_t glyph_id) const
   {
     switch (u.format) {

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

@@ -736,8 +736,8 @@ struct PairPosFormat2
     unsigned int len2 = valueFormat2.get_len ();
     unsigned int record_len = len1 + len2;
 
-    unsigned int klass1 = (this+classDef1) (c->buffer->cur().codepoint);
-    unsigned int klass2 = (this+classDef2) (c->buffer->info[skippy_iter.idx].codepoint);
+    unsigned int klass1 = (this+classDef1).get_class (c->buffer->cur().codepoint);
+    unsigned int klass2 = (this+classDef2).get_class (c->buffer->info[skippy_iter.idx].codepoint);
     if (unlikely (klass1 >= class1Count || klass2 >= class2Count)) return TRACE_RETURN (false);
 
     const Value *v = &values[record_len * (klass1 * class2Count + klass2)];

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

@@ -1192,7 +1192,7 @@ struct ContextFormat2
     TRACE_WOULD_APPLY (this);
 
     const ClassDef &class_def = this+classDef;
-    unsigned int index = class_def (c->glyphs[0]);
+    unsigned int index = class_def.get_class (c->glyphs[0]);
     const RuleSet &rule_set = this+ruleSet[index];
     struct ContextApplyLookupContext lookup_context = {
       {match_class},
@@ -1213,7 +1213,7 @@ struct ContextFormat2
     if (likely (index == NOT_COVERED)) return TRACE_RETURN (false);
 
     const ClassDef &class_def = this+classDef;
-    index = class_def (c->buffer->cur().codepoint);
+    index = class_def.get_class (c->buffer->cur().codepoint);
     const RuleSet &rule_set = this+ruleSet[index];
     struct ContextApplyLookupContext lookup_context = {
       {match_class},
@@ -1752,7 +1752,7 @@ struct ChainContextFormat2
 
     const ClassDef &input_class_def = this+inputClassDef;
 
-    unsigned int index = input_class_def (c->glyphs[0]);
+    unsigned int index = input_class_def.get_class (c->glyphs[0]);
     const ChainRuleSet &rule_set = this+ruleSet[index];
     struct ChainContextApplyLookupContext lookup_context = {
       {match_class},
@@ -1776,7 +1776,7 @@ struct ChainContextFormat2
     const ClassDef &input_class_def = this+inputClassDef;
     const ClassDef &lookahead_class_def = this+lookaheadClassDef;
 
-    index = input_class_def (c->buffer->cur().codepoint);
+    index = input_class_def.get_class (c->buffer->cur().codepoint);
     const ChainRuleSet &rule_set = this+ruleSet[index];
     struct ChainContextApplyLookupContext lookup_context = {
       {match_class},