d/dmd: Merge upstream dmd 974650488

Adds static function VarDeclaration::create to the dmd C++ interface.

Reviewed-on: https://github.com/dlang/dmd/pull/10008

From-SVN: r272349

gcc/d/dmd/MERGE

-c6887d9bbbe7b68e03ba3bccbf61432c1b369386
+9746504883fc64f3dcec0cd4cacbb7a372d52158
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.

gcc/d/dmd/declaration.c

@@ -830,6 +830,11 @@ VarDeclaration::VarDeclaration(Loc loc, Type *type, Identifier *id, Initializer
     this->sequenceNumber = ++nextSequenceNumber;
 }
 
+VarDeclaration *VarDeclaration::create(Loc loc, Type *type, Identifier *id, Initializer *init)
+{
+    return new VarDeclaration(loc, type, id, init);
+}
+
 Dsymbol *VarDeclaration::syntaxCopy(Dsymbol *s)
 {
     //printf("VarDeclaration::syntaxCopy(%s)\n", toChars());

gcc/d/dmd/declaration.h

@@ -265,6 +265,7 @@ public:
     IntRange *range;            // if !NULL, the variable is known to be within the range
 
     VarDeclaration(Loc loc, Type *t, Identifier *id, Initializer *init);
+    static VarDeclaration *create(Loc loc, Type *t, Identifier *id, Initializer *init);
     Dsymbol *syntaxCopy(Dsymbol *);
     void semantic(Scope *sc);
     void setFieldOffset(AggregateDeclaration *ad, unsigned *poffset, bool isunion);