From 59bc706d0a024a4b19ee9f57ac33e9c5463e7ffd Mon Sep 17 00:00:00 2001
From: Timothy Warren <twarren@nabancard.com>
Date: Mon, 11 Feb 2019 09:34:46 -0500
Subject: [PATCH] Add advanced_functions example

---
 .idea/misc.xml                 |  1 +
 .idea/rust.iml                 |  5 ++
 .idea/workspace.xml            | 96 +++++++++++++++++++---------------
 advanced_functions/Cargo.toml  |  7 +++
 advanced_functions/src/main.rs | 38 ++++++++++++++
 5 files changed, 105 insertions(+), 42 deletions(-)
 create mode 100644 advanced_functions/Cargo.toml
 create mode 100644 advanced_functions/src/main.rs

diff --git a/.idea/misc.xml b/.idea/misc.xml
index 06e172b..197e36a 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -40,6 +40,7 @@
     <cargoProject FILE="$PROJECT_DIR$/advanced_lifetimes/Cargo.toml" />
     <cargoProject FILE="$PROJECT_DIR$/advanced_traits/Cargo.toml" />
     <cargoProject FILE="$PROJECT_DIR$/advanced_types/Cargo.toml" />
+    <cargoProject FILE="$PROJECT_DIR$/advanced_functions/Cargo.toml" />
   </component>
   <component name="ComposerJsonPluginSettings">
     <unboundedVersionInspectionSettings>
diff --git a/.idea/rust.iml b/.idea/rust.iml
index 54d35f8..6566c66 100644
--- a/.idea/rust.iml
+++ b/.idea/rust.iml
@@ -161,9 +161,14 @@
       <sourceFolder url="file://$MODULE_DIR$/advanced_types/examples" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/advanced_types/tests" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/advanced_types/benches" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/advanced_functions/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/advanced_functions/examples" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/advanced_functions/tests" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/advanced_functions/benches" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/add/add-one/target" />
       <excludeFolder url="file://$MODULE_DIR$/add/adder/target" />
       <excludeFolder url="file://$MODULE_DIR$/adder/target" />
+      <excludeFolder url="file://$MODULE_DIR$/advanced_functions/target" />
       <excludeFolder url="file://$MODULE_DIR$/advanced_lifetimes/target" />
       <excludeFolder url="file://$MODULE_DIR$/advanced_traits/target" />
       <excludeFolder url="file://$MODULE_DIR$/advanced_types/target" />
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 5708fa1..3212679 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -15,10 +15,18 @@
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
       <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/advanced_types/src/main.rs">
+        <entry file="file://$PROJECT_DIR$/advanced_functions/src/main.rs">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="256">
-              <caret line="16" selection-start-line="16" selection-end-line="16" />
+            <state relative-caret-position="544">
+              <caret line="34" column="25" selection-start-line="34" selection-start-column="25" selection-end-line="34" selection-end-column="25" />
+              <folding>
+                <element signature="e#26#27#0" expanded="true" />
+                <element signature="e#38#39#0" expanded="true" />
+                <element signature="e#89#90#0" expanded="true" />
+                <element signature="e#112#113#0" expanded="true" />
+                <element signature="e#271#272#0" expanded="true" />
+                <element signature="e#291#292#0" expanded="true" />
+              </folding>
             </state>
           </provider>
         </entry>
@@ -52,7 +60,6 @@
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
-        <option value="$PROJECT_DIR$/guessing_game/.gitignore" />
         <option value="$PROJECT_DIR$/errors/src/main.rs" />
         <option value="$PROJECT_DIR$/.gitignore" />
         <option value="$PROJECT_DIR$/largest_number/src/main.rs" />
@@ -103,6 +110,7 @@
         <option value="$PROJECT_DIR$/advanced_traits/src/lib.rs" />
         <option value="$PROJECT_DIR$/advanced_traits/src/main.rs" />
         <option value="$PROJECT_DIR$/advanced_types/src/main.rs" />
+        <option value="$PROJECT_DIR$/advanced_functions/src/main.rs" />
       </list>
     </option>
   </component>
@@ -112,7 +120,7 @@
     <annotation-enable>false</annotation-enable>
     <other-services-enabled>false</other-services-enabled>
   </component>
-  <component name="ProjectFrameBounds">
+  <component name="ProjectFrameBounds" extendedState="6">
     <option name="x" value="1920" />
     <option name="y" value="-438" />
     <option name="width" value="1080" />
@@ -159,12 +167,12 @@
             <path>
               <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
               <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="advanced_types" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="advanced_functions" type="9f88c78c:ScopeViewTreeModel$FileNode" />
             </path>
             <path>
               <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
               <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="advanced_types" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="advanced_functions" type="9f88c78c:ScopeViewTreeModel$FileNode" />
               <item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
             </path>
           </expand>
@@ -175,7 +183,7 @@
   </component>
   <component name="PropertiesComponent">
     <property name="JavaScriptWeakerCompletionTypeGuess" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1549652604126" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1549895652600" />
     <property name="javascript.nodejs.core.library.configured.version" value="7.1.0" />
     <property name="js.eslint.eslintPackage" value="$USER_HOME$/.yarn-config/global/node_modules/.bin/eslint" />
     <property name="js.eslint.nodeInterpreter" value="project" />
@@ -203,7 +211,7 @@
       </list>
     </option>
   </component>
-  <component name="RunManager" selected="Cargo Command.Run advanced_types">
+  <component name="RunManager" selected="Cargo Command.Run advanced_functions">
     <configuration name="&lt;template&gt;" type="TestNG" default="true" selected="false">
       <option name="MAIN_CLASS_NAME" />
       <option name="VM_PARAMETERS" value="-ea" />
@@ -222,6 +230,16 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
+    <configuration name="Run advanced_functions" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
+      <option name="channel" value="DEFAULT" />
+      <option name="command" value="run --package advanced_functions --bin advanced_functions" />
+      <option name="allFeatures" value="false" />
+      <option name="nocapture" value="false" />
+      <option name="backtrace" value="SHORT" />
+      <option name="workingDirectory" value="file://$PROJECT_DIR$/advanced_functions" />
+      <envs />
+      <method v="2" />
+    </configuration>
     <configuration name="Run advanced_lifetimes" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
       <option name="channel" value="DEFAULT" />
       <option name="command" value="run --package advanced_lifetimes --bin advanced_lifetimes" />
@@ -262,16 +280,6 @@
       <envs />
       <method v="2" />
     </configuration>
-    <configuration name="Test tests::it_works" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
-      <option name="channel" value="DEFAULT" />
-      <option name="command" value="test --package advanced_lifetimes --lib tests::it_works -- --exact" />
-      <option name="allFeatures" value="false" />
-      <option name="nocapture" value="false" />
-      <option name="backtrace" value="SHORT" />
-      <option name="workingDirectory" value="file://$PROJECT_DIR$/advanced_lifetimes" />
-      <envs />
-      <method v="2" />
-    </configuration>
     <configuration default="true" type="JUnit" factoryName="JUnit">
       <option name="TEST_OBJECT" value="class" />
       <option name="WORKING_DIRECTORY" value="$MODULE_DIR$" />
@@ -281,11 +289,11 @@
     </configuration>
     <recent_temporary>
       <list>
+        <item itemvalue="Cargo Command.Run advanced_functions" />
         <item itemvalue="Cargo Command.Run advanced_types" />
         <item itemvalue="Cargo Command.Run advanced_traits" />
         <item itemvalue="Cargo Command.Run advanced_lifetimes" />
         <item itemvalue="Cargo Command.Test lib::tests" />
-        <item itemvalue="Cargo Command.Test tests::it_works" />
       </list>
     </recent_temporary>
   </component>
@@ -325,8 +333,8 @@
     <frame x="1920" y="-438" width="1080" height="1897" extended-state="6" />
     <editor active="true" />
     <layout>
-      <window_info active="true" content_ui="combo" id="Project" order="0" sideWeight="0.4958077" visible="true" weight="0.2540132" />
-      <window_info id="Structure" order="1" sideWeight="0.5041923" side_tool="true" visible="true" weight="0.2540132" />
+      <window_info content_ui="combo" id="Project" order="0" sideWeight="0.49586156" visible="true" weight="0.2540132" />
+      <window_info id="Structure" order="1" sideWeight="0.50413847" side_tool="true" visible="true" weight="0.2540132" />
       <window_info id="Image Layers" order="2" />
       <window_info id="Designer" order="3" />
       <window_info id="Capture Tool" order="4" />
@@ -334,7 +342,7 @@
       <window_info id="Cargo" order="6" sideWeight="0.49791494" weight="0.3286119" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" weight="0.32979318" />
-      <window_info anchor="bottom" id="Run" order="2" weight="0.2571269" />
+      <window_info active="true" anchor="bottom" id="Run" order="2" visible="true" weight="0.2571269" />
       <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
       <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
       <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
@@ -356,17 +364,6 @@
     <option name="version" value="1" />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/modules/src/sound/instrument.rs">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="48">
-          <caret line="3" lean-forward="true" selection-start-line="3" selection-end-line="3" />
-          <folding>
-            <element signature="e#18#19#0" expanded="true" />
-            <element signature="e#60#61#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/modules/src/performance_group.rs">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="96">
@@ -563,13 +560,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/add/Cargo.toml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="96">
-          <caret line="6" selection-start-line="6" selection-end-line="6" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/add/adder/src/main.rs">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="64">
@@ -804,7 +794,29 @@
     <entry file="file://$PROJECT_DIR$/advanced_types/src/main.rs">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="256">
-          <caret line="16" selection-start-line="16" selection-end-line="16" />
+          <caret line="16" lean-forward="true" selection-start-line="16" selection-end-line="16" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/add/Cargo.toml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="96">
+          <caret line="6" lean-forward="true" selection-start-line="6" selection-end-line="6" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/advanced_functions/src/main.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="544">
+          <caret line="34" column="25" selection-start-line="34" selection-start-column="25" selection-end-line="34" selection-end-column="25" />
+          <folding>
+            <element signature="e#26#27#0" expanded="true" />
+            <element signature="e#38#39#0" expanded="true" />
+            <element signature="e#89#90#0" expanded="true" />
+            <element signature="e#112#113#0" expanded="true" />
+            <element signature="e#271#272#0" expanded="true" />
+            <element signature="e#291#292#0" expanded="true" />
+          </folding>
         </state>
       </provider>
     </entry>
diff --git a/advanced_functions/Cargo.toml b/advanced_functions/Cargo.toml
new file mode 100644
index 0000000..c0e5634
--- /dev/null
+++ b/advanced_functions/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "advanced_functions"
+version = "0.1.0"
+authors = ["Timothy Warren <twarren@nabancard.com>"]
+edition = "2018"
+
+[dependencies]
diff --git a/advanced_functions/src/main.rs b/advanced_functions/src/main.rs
new file mode 100644
index 0000000..d128ff2
--- /dev/null
+++ b/advanced_functions/src/main.rs
@@ -0,0 +1,38 @@
+fn add_one(x: i32) -> i32 {
+    x + 1
+}
+
+/// A function with a function pointer argument
+fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
+    f(arg) + f(arg)
+}
+
+#[derive(Debug)]
+enum Status {
+    Value(u32),
+    Stop,
+}
+
+fn returns_closure() -> Box<dyn Fn (i32) -> i32> {
+    Box::new(|x| x + 1)
+}
+
+fn main() {
+    let answer = do_twice(add_one, 5);
+
+    println!("The answer is: {}", answer);
+
+    // Tuple Structs set up via function pointers
+    let list_of_statuses: Vec<Status> =
+        (0u32..20)
+            .map(Status::Value)
+            .collect();
+
+    println!("List of statuses: {:?}", list_of_statuses);
+
+    let increment = returns_closure();
+    let x = 5;
+    let y = increment(x);
+
+    println!("The returned closure returns: {}", y);
+}