Virtual Tags: New 'PROJECT', 'PRIORITY' and 'LATEST' virtual tags

- Added documentation.

ChangeLog

@@ -153,7 +153,7 @@
   Shahaf).
 - When multiple tasks are 'edit'ed, a failure causes the editing to stop (thanks
   to Daniel Shahaf).
-- New 'UDA' and 'ORPHAN' virtual tags.
+- New 'UDA', 'ORPHAN', 'PROJECT', 'PRIORITY' and 'LATEST' virtual tags.
 - Commands that do not accept filters or modifications now generate an error
   when extra arguments are specified.
 - Improved zsh support (thanks to Daniel Shahaf).

NEWS

@@ -3,7 +3,7 @@ New Features in Taskwarrior 2.4.5
 
   - The active context, if one is set, is now identified in "task context list"
   - It is an error to attempt adding or removing a virtual tag.
-  - New 'UDA' and 'ORPHAN' virtual tags.
+  - New 'UDA', 'ORPHAN', 'PROJECT', 'PRIORITY' and 'LATEST'  virtual tags.
 
 New commands in Taskwarrior 2.4.5
 

doc/man/task.1.in

@@ -665,11 +665,14 @@ are:
     DELETED      Matches if the task has deleted status
     DUE          Matches if the task is due
     DUETODAY     Matches if the task is due today
+    LATEST       Matches if the task is the newest added task
     MONTH        Matches if the task is due this month
     ORPHAN       Matches if the task has any orphaned UDA values
     OVERDUE      Matches if the task is overdue
     PARENT       Matches if the task is a parent
     PENDING      Matches if the task has pending status
+    PRIORITY     Matches if the task has a priority
+    PROJECT      Matches if the task has a project
     READY        Matches if the task is actionable
     SCHEDULED    Matches if the task is scheduled
     TAGGED       Matches if the task has tags
@@ -682,6 +685,7 @@ are:
     WEEK         Matches if the task is due this week
     YEAR         Matches if the task is due this year
     YESTERDAY    Matches if the task was due sometime yesterday
+
 .\" If you update the above list, update src/commands/CmdInfo.cpp and src/commands/CmdTags.cpp as well.
 
 You can use +BLOCKED to filter blocked tasks, or -BLOCKED for unblocked tasks.

src/Task.cpp

@@ -32,6 +32,7 @@
 #include <string>
 #ifdef PRODUCT_TASKWARRIOR
 #include <math.h>
+#include <ctype.h>
 #include <cfloat>
 #endif
 #include <algorithm>
@@ -1170,35 +1171,40 @@ bool Task::hasTag (const std::string& tag) const
   // Synthetic tags - dynamically generated, but do not occupy storage space.
   // Note: This list must match that in CmdInfo::execute.
   // Note: This list must match that in ::feedback_reserved_tags.
-  if (tag == "BLOCKED")   return is_blocked;
-  if (tag == "UNBLOCKED") return !is_blocked;
-  if (tag == "BLOCKING")  return is_blocking;
+  if (isupper (tag[0]))
+  {
+    if (tag == "BLOCKED")   return is_blocked;
+    if (tag == "UNBLOCKED") return !is_blocked;
+    if (tag == "BLOCKING")  return is_blocking;
 #ifdef PRODUCT_TASKWARRIOR
-  if (tag == "READY")     return is_ready ();
-  if (tag == "DUE")       return is_due ();
-  if (tag == "DUETODAY")  return is_duetoday ();
-  if (tag == "TODAY")     return is_duetoday ();
-  if (tag == "YESTERDAY") return is_dueyesterday ();
-  if (tag == "TOMORROW")  return is_duetomorrow ();
-  if (tag == "OVERDUE")   return is_overdue ();
-  if (tag == "WEEK")      return is_dueweek ();
-  if (tag == "MONTH")     return is_duemonth ();
-  if (tag == "YEAR")      return is_dueyear ();
+    if (tag == "READY")     return is_ready ();
+    if (tag == "DUE")       return is_due ();
+    if (tag == "DUETODAY")  return is_duetoday ();
+    if (tag == "TODAY")     return is_duetoday ();
+    if (tag == "YESTERDAY") return is_dueyesterday ();
+    if (tag == "TOMORROW")  return is_duetomorrow ();
+    if (tag == "OVERDUE")   return is_overdue ();
+    if (tag == "WEEK")      return is_dueweek ();
+    if (tag == "MONTH")     return is_duemonth ();
+    if (tag == "YEAR")      return is_dueyear ();
 #endif
-  if (tag == "ACTIVE")    return has ("start");
-  if (tag == "SCHEDULED") return has ("scheduled");
-  if (tag == "CHILD")     return has ("parent");
-  if (tag == "UNTIL")     return has ("until");
-  if (tag == "ANNOTATED") return hasAnnotations ();
-  if (tag == "TAGGED")    return has ("tags");
-  if (tag == "PARENT")    return has ("mask");
-  if (tag == "WAITING")   return get ("status") == "waiting";
-  if (tag == "PENDING")   return get ("status") == "pending";
-  if (tag == "COMPLETED") return get ("status") == "completed";
-  if (tag == "DELETED")   return get ("status") == "deleted";
-  if (tag == "UDA")       return is_udaPresent ();
-  if (tag == "ORPHAN")    return is_orphanPresent ();
-  if (tag == "LATEST")    return id == context.tdb2.latest_id ();
+    if (tag == "ACTIVE")    return has ("start");
+    if (tag == "SCHEDULED") return has ("scheduled");
+    if (tag == "CHILD")     return has ("parent");
+    if (tag == "UNTIL")     return has ("until");
+    if (tag == "ANNOTATED") return hasAnnotations ();
+    if (tag == "TAGGED")    return has ("tags");
+    if (tag == "PARENT")    return has ("mask");
+    if (tag == "WAITING")   return get ("status") == "waiting";
+    if (tag == "PENDING")   return get ("status") == "pending";
+    if (tag == "COMPLETED") return get ("status") == "completed";
+    if (tag == "DELETED")   return get ("status") == "deleted";
+    if (tag == "UDA")       return is_udaPresent ();
+    if (tag == "ORPHAN")    return is_orphanPresent ();
+    if (tag == "LATEST")    return id == context.tdb2.latest_id ();
+    if (tag == "PROJECT")   return has ("project");
+    if (tag == "PRIORITY")  return has ("priority");
+  }
 
   // Concrete tags.
   std::vector <std::string> tags;

src/commands/CmdInfo.cpp

@@ -338,6 +338,8 @@ int CmdInfo::execute (std::string& output)
       if (task.hasTag ("YEAR"))      virtualTags += "YEAR ";
       if (task.hasTag ("YESTERDAY")) virtualTags += "YESTERDAY ";
       if (task.hasTag ("LATEST"))    virtualTags += "LATEST ";
+      if (task.hasTag ("PROJECT"))   virtualTags += "PROJECT ";
+      if (task.hasTag ("PRIORITY"))  virtualTags += "PRIORITY ";
       // If you update the above list, update src/commands/CmdInfo.cpp and src/commands/CmdTags.cpp as well.
 
       row = view.addRow ();

src/feedback.cpp

@@ -357,30 +357,35 @@ void feedback_reserved_tags (const std::string& tag)
 {
   // Note: This list must match that in Task::hasTag.
   // Note: This list must match that in CmdInfo::execute.
-  if (tag == "BLOCKED"   ||
-      tag == "UNBLOCKED" ||
+  if (tag == "ACTIVE"    ||
+      tag == "ANNOTATED" ||
+      tag == "BLOCKED"   ||
       tag == "BLOCKING"  ||
-      tag == "READY"     ||
+      tag == "CHILD"     ||
+      tag == "COMPLETED" ||
+      tag == "DELETED"   ||
       tag == "DUE"       ||
       tag == "DUETODAY"  ||
-      tag == "TODAY"     ||
-      tag == "YESTERDAY" ||
-      tag == "TOMORROW"  ||
-      tag == "OVERDUE"   ||
-      tag == "WEEK"      ||
+      tag == "LATEST"    ||
       tag == "MONTH"     ||
-      tag == "YEAR"      ||
-      tag == "ACTIVE"    ||
-      tag == "SCHEDULED" ||
-      tag == "CHILD"     ||
-      tag == "UNTIL"     ||
-      tag == "ANNOTATED" ||
-      tag == "TAGGED"    ||
+      tag == "ORPHAN"    ||
+      tag == "OVERDUE"   ||
       tag == "PARENT"    ||
-      tag == "WAITING"   ||
       tag == "PENDING"   ||
-      tag == "COMPLETED" ||
-      tag == "DELETED")
+      tag == "PRIORITY"  ||
+      tag == "PROJECT"   ||
+      tag == "READY"     ||
+      tag == "SCHEDULED" ||
+      tag == "TAGGED"    ||
+      tag == "TODAY"     ||
+      tag == "TOMORROW"  ||
+      tag == "UDA"       ||
+      tag == "UNBLOCKED" ||
+      tag == "UNTIL"     ||
+      tag == "WAITING"   ||
+      tag == "WEEK"      ||
+      tag == "YEAR"      ||
+      tag == "YESTERDAY")
   {
     throw format (STRING_FEEDBACK_TAG_VIRTUAL, tag);
   }