From 6a1b3708a6bc240cea79b3191b0dafacb014fdb6 Mon Sep 17 00:00:00 2001
From: Dimitri van Heesch <doxygen@gmail.com>
Date: Sun, 13 Jan 2019 13:15:54 +0100
Subject: Added 'constexpr' as attribute label and to XML output

---
 src/entry.h                |  1 +
 src/memberdef.cpp          |  6 ++++++
 src/memberdef.h            |  1 +
 src/scanner.l              | 12 ++++++++++++
 src/xmlgen.cpp             |  5 +++++
 templates/xml/compound.xsd |  1 +
 6 files changed, 26 insertions(+)

diff --git a/src/entry.h b/src/entry.h
index 44e47da..ad91d0d 100644
--- a/src/entry.h
+++ b/src/entry.h
@@ -138,6 +138,7 @@ class Entry
     static const uint64 Local           = (1ULL<<16); // for Slice types
 
     // member specifiers (add new items to the beginning)
+    static const uint64 ConstExpr       = (1ULL<<19); // C++11 constexpr
     static const uint64 PrivateGettable     = (1ULL<<20); // C# private getter
     static const uint64 ProtectedGettable   = (1ULL<<21); // C# protected getter
     static const uint64 PrivateSettable     = (1ULL<<22); // C# private setter
diff --git a/src/memberdef.cpp b/src/memberdef.cpp
index 29ae057..6f449d5 100644
--- a/src/memberdef.cpp
+++ b/src/memberdef.cpp
@@ -2034,6 +2034,7 @@ void MemberDef::getLabels(QStrList &sl,Definition *container) const
           if    (isPrivateGettable())     sl.append("private get");
           if    (isPrivateSettable())     sl.append("private set");
         }
+        if      (isConstExpr())           sl.append("constexpr");
         if      (isAddable())             sl.append("add");
         if      (!isUNOProperty() && isRemovable()) sl.append("remove");
         if      (isRaisable())            sl.append("raise");
@@ -4619,6 +4620,11 @@ bool MemberDef::isSliceLocal() const
   return (m_impl->memSpec&Entry::Local)!=0;
 }
 
+bool MemberDef::isConstExpr() const
+{
+  return (m_impl->memSpec&Entry::ConstExpr)!=0;
+}
+
 MemberList *MemberDef::enumFieldList() const
 {
   return m_impl->enumFields;
diff --git a/src/memberdef.h b/src/memberdef.h
index 650d9a5..ac54307 100644
--- a/src/memberdef.h
+++ b/src/memberdef.h
@@ -180,6 +180,7 @@ class MemberDef : public Definition
     bool isStrongEnumValue() const;
     bool livesInsideEnum() const;
     bool isSliceLocal() const;
+    bool isConstExpr() const;
 
     int numberOfFlowKeyWords();
     // derived getters
diff --git a/src/scanner.l b/src/scanner.l
index ee04dd9..cc497e3 100644
--- a/src/scanner.l
+++ b/src/scanner.l
@@ -1394,6 +1394,18 @@ OPERATOR  "operator"{B}*({ARITHOP}|{ASSIGNOP}|{LOGICOP}|{BITOP})
 					  current->virt = Virtual;
 					  lineCount();
 					}
+<FindMembers>{B}*"constexpr"{BN}+    	{ 
+                                          if (insideCpp)
+                                          {
+                                            current->type += " constexpr ";
+                                            current->spec |= Entry::ConstExpr;
+                                            lineCount();
+                                          }
+                                          else
+                                          {
+                                            REJECT;
+                                          }
+					}
 <FindMembers>{B}*"published"{BN}+	{ // UNO IDL published keyword
 					  if (insideIDL)
 					  {
diff --git a/src/xmlgen.cpp b/src/xmlgen.cpp
index 9d1642c..420a653 100644
--- a/src/xmlgen.cpp
+++ b/src/xmlgen.cpp
@@ -582,6 +582,11 @@ static void generateXMLForMember(MemberDef *md,FTextStream &ti,FTextStream &t,De
   if (md->isStatic()) t << "yes"; else t << "no";
   t << "\"";
 
+  if (md->isConstExpr())
+  {
+    t << " constexpr=\"yes\"";
+  }
+
   if (isFunc)
   {
     ArgumentList *al = md->argumentList();
diff --git a/templates/xml/compound.xsd b/templates/xml/compound.xsd
index 0994c7c..33310aa 100644
--- a/templates/xml/compound.xsd
+++ b/templates/xml/compound.xsd
@@ -156,6 +156,7 @@
     <xsd:attribute name="volatile" type="DoxBool" use="optional"/>
     <xsd:attribute name="mutable" type="DoxBool" use="optional"/>
     <xsd:attribute name="noexcept" type="DoxBool" use="optional"/>
+    <xsd:attribute name="constexpr" type="DoxBool" use="optional"/>
     <!-- Qt property -->
     <xsd:attribute name="readable" type="DoxBool" use="optional"/>
     <xsd:attribute name="writable" type="DoxBool" use="optional"/>
-- 
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