Addes tags command and --values option

Tags command reports all metadat tags in use.  With the
values option it reports tags and their values.

src/output.cc

@@ -318,6 +318,34 @@ void report_payees::operator()(post_t& post)
     (*i).second++;
 }
 
+void report_tags::flush()
+{
+  std::ostream& out(report.output_stream);
+
+  foreach (tags_pair& entry, tags) {
+    if (report.HANDLED(count))
+      out << entry.second << ' ';
+    out << entry.first << '\n';
+  }
+}
+
+void report_tags::operator()(post_t& post)
+{
+  if(post.metadata){
+    foreach (const item_t::string_map::value_type& data, *post.metadata){
+      string tag=data.first;
+      if(report.HANDLED(values) && (data.second).first){
+	tag+=": "+ (data.second).first.get().to_string();
+      }
+      std::map<string, std::size_t>::iterator i = tags.find(tag);
+      if (i == tags.end())
+	tags.insert(tags_pair(tag, 1));
+      else
+	(*i).second++;
+    }
+  }
+}
+
 void report_commodities::flush()
 {
   std::ostream& out(report.output_stream);

src/output.h

@@ -189,6 +189,33 @@ public:
   }
 };
 
+class report_tags : public item_handler<post_t>
+{
+protected:
+  report_t& report;
+
+  std::map<string, std::size_t> tags;
+
+  typedef std::map<string, std::size_t>::value_type tags_pair;
+
+public:
+  report_tags(report_t& _report) : report(_report) {
+    TRACE_CTOR(report_tags, "report&");
+  }
+  virtual ~report_tags() {
+    TRACE_DTOR(report_tags);
+  }
+
+  virtual void flush();
+  virtual void operator()(post_t& post);
+
+  virtual void clear() {
+    tags.clear();
+    item_handler<post_t>::clear();
+  }
+};
+
+
 class report_commodities : public item_handler<post_t>
 {
 protected:

src/report.cc

@@ -1089,7 +1089,6 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     else OPT(anon);
     else OPT_ALT(color, ansi);
     else OPT(auto_match);
-    else OPT(aux_date);
     else OPT(average);
     else OPT(account_width_);
     else OPT(amount_width_);
@@ -1097,7 +1096,7 @@ option_t<report_t> * report_t::lookup_option(const char * p)
   case 'b':
     OPT(balance_format_);
     else OPT(base);
-    else OPT(basis);
+    else OPT_ALT(basis, cost);
     else OPT_(begin_);
     else OPT(bold_if_);
     else OPT(budget);
@@ -1106,7 +1105,6 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     break;
   case 'c':
     OPT(csv_format_);
-    else OPT_ALT(gain, change);
     else OPT(cleared);
     else OPT(collapse);
     else OPT(collapse_if_zero);
@@ -1124,7 +1122,6 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     else OPT(dc);
     else OPT(depth_);
     else OPT(deviation);
-    else OPT_ALT(rich_data, detail);
     else OPT_(display_);
     else OPT(display_amount_);
     else OPT(display_total_);
@@ -1149,7 +1146,7 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     else OPT_ALT(head_, first_);
     break;
   case 'g':
-    OPT(gain);
+    OPT_ALT(gain, change);
     else OPT(group_by_);
     else OPT(group_title_format_);
     else OPT(generated);
@@ -1176,7 +1173,7 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     else OPT_ALT(tail_, last_);
     break;
   case 'm':
-    OPT(market);
+    OPT_ALT(market, value);
     else OPT(monthly);
     else OPT(meta_);
     else OPT(meta_width_);
@@ -1206,7 +1203,6 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     else OPT(price);
     else OPT(prices_format_);
     else OPT(pricedb_format_);
-    else OPT(primary_date);
     else OPT(payee_width_);
     else OPT(prepend_format_);
     else OPT(prepend_width_);
@@ -1224,7 +1220,7 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     else OPT(revalued);
     else OPT(revalued_only);
     else OPT(revalued_total_);
-    else OPT(rich_data);
+    else OPT_ALT(rich_data, detail);
     break;
   case 's':
     OPT(sort_);
@@ -1252,7 +1248,7 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     else OPT(unround);
     break;
   case 'v':
-    OPT_ALT(market, value);
+    OPT(values);
     break;
   case 'w':
     OPT(weekly);
@@ -1670,7 +1666,11 @@ expr_t::ptr_op_t report_t::lookup(const symbol_t::kind_t kind,
       else if (is_eq(p, "select"))
         return WRAP_FUNCTOR(select_command);
       break;
-
+    case 't':
+      if (is_eq(p, "tags")) {
+        return POSTS_REPORTER(new report_tags(*this));
+      }
+      break;
     case 'x':
       if (is_eq(p, "xact"))
         return WRAP_FUNCTOR(xact_command);

src/report.h

@@ -358,6 +358,7 @@ public:
     HANDLER(account_width_).report(out);
     HANDLER(amount_width_).report(out);
     HANDLER(total_width_).report(out);
+    HANDLER(values).report(out);
   }
 
   option_t<report_t> * lookup_option(const char * p);
@@ -1043,6 +1044,7 @@ public:
   OPTION(report_t, account_width_);
   OPTION(report_t, amount_width_);
   OPTION(report_t, total_width_);
+  OPTION(report_t, values);
 };
 
 template <class Type        = post_t,