Add cast modifier for boolean values

README.md

@@ -4,7 +4,7 @@
 
 `SweetXml` is a thin wrapper around `:xmerl`. It allows you to convert a
 `char_list` or `xmlElement` record as defined in `:xmerl` to an elixir value such
-as `map`, `list`, `string`, `integer`, `float` or any combination of these.
+as `map`, `list`, `string`, `integer`, `float`, `boolean` or any combination of these.
 
 
 ## Examples
@@ -181,13 +181,18 @@ is being returned.
 
     'i' stands for (i)nteger. This forces `xpath/2` to return the value as
     integer instead of a char list.
-
+
+  * `~x"//some/path"il` - integer list.
+
   * `~x"//some/path"f`
 
     'f' stands for (f)loat. This forces `xpath/2` to return the value as
     float instead of a char list.
 
-  * `~x"//some/path"il` - integer list.
+  * `~x"//some/path"b`
+
+    'b' stands for (b)oolean. This forces `xpath/2` to return the value as
+    boolean instead of the char lists `'true'` and `'false'`.
 
 Also in the examples section, we always import SweetXml first. This
 makes `x_sigil` available in the current scope. Without it, instead of using
@@ -249,7 +254,7 @@ result = doc
 assert result == 'Match One'
 ```
 
-We can specify multiple namespace prefixes: 
+We can specify multiple namespace prefixes:
 
 ```elixir
 result = doc

lib/sweet_xml.ex

@@ -198,6 +198,7 @@ defmodule SweetXml do
         ?s in modifiers -> :string
         ?i in modifiers -> :integer
         ?f in modifiers -> :float
+        ?b in modifiers -> :boolean
         :otherwise -> false
       end
     }
@@ -658,5 +659,7 @@ defmodule SweetXml do
   defp to_cast(value, :string), do: to_string(value)
   defp to_cast(value, :integer), do: String.to_integer(to_string(value))
   defp to_cast(value, :float), do: String.to_float(to_string(value))
+  defp to_cast('true', :boolean), do: true
+  defp to_cast('false', :boolean), do: false
 
 end

test/files/complex.xml

@@ -7,6 +7,7 @@
     <url>http://football.fantasysports.yahoo.com/archive/nfl/2012/239541</url>
     <draft_status>postdraft</draft_status>
     <num_teams>10</num_teams>
+    <active>true</active>
     <edit_key>17</edit_key>
     <weekly_deadline/>
     <league_update_timestamp>1357339553</league_update_timestamp>

test/sweet_xml_test.exs

@@ -30,19 +30,22 @@ defmodule SweetXmlTest do
   end
 
   test "xpath sigil" do
-    assert ~x"//header/text()" == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: false}
-    assert ~x"//header/text()"e == %SweetXpath{path: '//header/text()', is_value: false, is_list: false, is_keyword: false, cast_to: false}
-    assert ~x"//header/text()"l == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: false}
-    assert ~x"//header/text()"k == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: true, cast_to: false}
-    assert ~x"//header/text()"s == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: :string}
-    assert ~x"//header/text()"i == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: :integer}
-    assert ~x"//header/text()"f == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: :float}
+    assert ~x"//header/text()"   == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: false}
+    assert ~x"//header/text()"e  == %SweetXpath{path: '//header/text()', is_value: false, is_list: false, is_keyword: false, cast_to: false}
+    assert ~x"//header/text()"l  == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: false}
+    assert ~x"//header/text()"k  == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: true, cast_to: false}
+    assert ~x"//header/text()"s  == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: :string}
+    assert ~x"//header/text()"i  == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: :integer}
+    assert ~x"//header/text()"f  == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: :float}
     assert ~x"//header/text()"el == %SweetXpath{path: '//header/text()', is_value: false, is_list: true, is_keyword: false, cast_to: false}
     assert ~x"//header/text()"le == %SweetXpath{path: '//header/text()', is_value: false, is_list: true, is_keyword: false, cast_to: false}
     assert ~x"//header/text()"sl == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: :string}
     assert ~x"//header/text()"ls == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: :string}
     assert ~x"//header/text()"il == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: :integer}
     assert ~x"//header/text()"li == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: :integer}
+    assert ~x"//header/text()"b  == %SweetXpath{path: '//header/text()', is_value: true, is_list: false, is_keyword: false, cast_to: :boolean}
+    assert ~x"//header/text()"bl == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: :boolean}
+    assert ~x"//header/text()"lb == %SweetXpath{path: '//header/text()', is_value: true, is_list: true, is_keyword: false, cast_to: :boolean}
   end
 
   test "xpath with sweet_xpath as only argment", %{simple: doc} do
@@ -418,7 +421,8 @@ defmodule SweetXmlTest do
     assert xpath(doc, ~x[/fantasy_content/league/league_id/text()])  == '239541'
     assert xpath(doc, ~x[/fantasy_content/league/league_id/text()]s) == "239541"
     assert xpath(doc, ~x[/fantasy_content/league/league_id/text()]i) ==  239541
-    assert xpath(doc, ~x[//total/text()]f) ==  204.68
+    assert xpath(doc, ~x[//total/text()]f) == 204.68
+    assert xpath(doc, ~x[//active/text()]b) == true
   end
 
   test "xml entities do not split strings" do