Added destructors, constructors, and invariants to ctags output

ctags.d

@@ -90,6 +90,26 @@ class CTagsPrinter : ASTVisitor
 		context = c;
 	}
 
+	override void visit(const Constructor dec)
+	{
+		tagLines ~= "this\t%s\t%d;\"\tf\tarity:%d%s\n".format(fileName,
+			dec.line, dec.parameters.parameters.length, context);
+		auto c = context;
+		context = "\tfunction: this";
+		dec.accept(this);
+		context = c;
+	}
+
+	override void visit(const Destructor dec)
+	{
+		tagLines ~= "~this\t%s\t%d;\"\tf%s\n".format(fileName, dec.line,
+			context);
+		auto c = context;
+		context = "\tfunction: this";
+		dec.accept(this);
+		context = c;
+	}
+
 	override void visit(const EnumDeclaration dec)
 	{
 		if (dec.name == tok!"")
@@ -136,6 +156,11 @@ class CTagsPrinter : ASTVisitor
 		dec.accept(this);
 	}
 
+	override void visit(const Invariant dec)
+	{
+		tagLines ~= "invariant\t%s\t%d;\"\tv%s\n".format(fileName, dec.line, context);
+	}
+
 	alias visit = ASTVisitor.visit;
 
 	string fileName;

std/d/ast.d

@@ -1239,7 +1239,9 @@ public:
     }
     /** */ MemberFunctionAttribute[] memberFunctionAttributes;
     /** */ FunctionBody functionBody;
-    /** */ size_t location;
+    /** */ size_t line;
+    /** */ size_t column;
+    /** */ size_t index;
     /** */ string comment;
     mixin OpEquals;
 }
@@ -1780,6 +1782,8 @@ public:
     }
     /** */ BlockStatement blockStatement;
     /** */ string comment;
+    size_t line;
+    size_t index;
     mixin OpEquals;
 }
 

std/d/parser.d

@@ -1976,6 +1976,9 @@ class ClassFour(A, B) if (someTest()) : Super {}}c;
         node.comment = comment;
         comment = null;
         if (expect(tok!"~") is null) return null;
+        node.index = current.index;
+        node.line = current.line;
+        node.column = current.column;
         if (expect(tok!"this") is null) return null;
         if (expect(tok!"(") is null) return null;
         if (expect(tok!")") is null) return null;
@@ -3185,6 +3188,8 @@ interface "Four"
     Invariant parseInvariant()
     {
         auto node = allocate!Invariant;
+        node.index = current.index;
+        node.line = current.line;
         if (expect(tok!"invariant") is null) return null;
         if (currentIs(tok!"("))
         {