Adding new stuff

vim-plugins/bundle/targets.vim/autoload/targets/state.vim

@@ -0,0 +1,54 @@
+let s:invalid = 0
+let s:empty = 1
+let s:nonempty = 2
+
+function! targets#state#new(state)
+    return {
+        \ 'state': a:state,
+        \
+        \ 'isInvalid': function('targets#state#isInvalid'),
+        \ 'isEmpty': function('targets#state#isEmpty'),
+        \ 'isNonempty': function('targets#state#isNonempty'),
+        \ 'isValid': function('targets#state#isValid'),
+        \ 'isInvalidOrEmpty': function('targets#state#isInvalidOrEmpty'),
+        \ }
+endfunction
+
+" constructors
+
+function! targets#state#invalid()
+    return targets#state#new(s:invalid)
+endfunction
+
+function! targets#state#nonempty()
+    return targets#state#new(s:nonempty)
+endfunction
+
+function! targets#state#empty()
+    return targets#state#new(s:empty)
+endfunction
+
+" raw attributes
+
+function! targets#state#isInvalid() dict
+    return self.state == s:invalid
+endfunction
+
+function! targets#state#isEmpty() dict
+    return self.state == s:empty
+endfunction
+
+function! targets#state#isNonempty() dict
+    return self.state == s:nonempty
+endfunction
+
+" derived attributes
+
+" empty or nonempty
+function! targets#state#isValid() dict
+    return self.state != s:invalid
+endfunction
+
+function! targets#state#isInvalidOrEmpty() dict
+    return self.state != s:nonempty
+endfunction