Add lifetime generic example
This commit is contained in:
Timothy Warren
parent
abdd1da877
commit
65f88596cb
1
.idea/misc.xml
generated
1
.idea/misc.xml
generated
@ -18,6 +18,7 @@
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<cargoProject FILE="$PROJECT_DIR$/errors/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/largest_number/src/main.rs" />
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<cargoProject FILE="$PROJECT_DIR$/generics/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/lifetimes/Cargo.toml" />
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</component>
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<component name="ComposerJsonPluginSettings">
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<unboundedVersionInspectionSettings>
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5
.idea/rust.iml
generated
5
.idea/rust.iml
generated
@ -70,6 +70,10 @@
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<sourceFolder url="file://$MODULE_DIR$/generics/examples" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/generics/tests" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/generics/benches" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/lifetimes/src" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/lifetimes/examples" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/lifetimes/tests" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/lifetimes/benches" isTestSource="true" />
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<excludeFolder url="file://$MODULE_DIR$/branches/target" />
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<excludeFolder url="file://$MODULE_DIR$/ctof/target" />
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<excludeFolder url="file://$MODULE_DIR$/enums/target" />
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@ -78,6 +82,7 @@
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<excludeFolder url="file://$MODULE_DIR$/functions/target" />
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<excludeFolder url="file://$MODULE_DIR$/generics/target" />
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<excludeFolder url="file://$MODULE_DIR$/guessing_game/target" />
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<excludeFolder url="file://$MODULE_DIR$/lifetimes/target" />
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<excludeFolder url="file://$MODULE_DIR$/loops/target" />
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<excludeFolder url="file://$MODULE_DIR$/modules/target" />
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<excludeFolder url="file://$MODULE_DIR$/rectangles/target" />
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94
.idea/workspace.xml
generated
94
.idea/workspace.xml
generated
@ -14,42 +14,14 @@
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</component>
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<component name="FileEditorManager">
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<leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
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<file pinned="false" current-in-tab="false">
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<entry file="file://$PROJECT_DIR$/generics/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="192">
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</state>
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</provider>
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</entry>
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</file>
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<file pinned="false" current-in-tab="false">
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<entry file="file://$PROJECT_DIR$/generics/src/point.rs">
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<provider selected="true" editor-type-id="text-editor">
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</folding>
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</state>
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</provider>
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</entry>
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</file>
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<file pinned="false" current-in-tab="true">
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<entry file="file://$PROJECT_DIR$/generics/src/lib.rs">
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<entry file="file://$PROJECT_DIR$/lifetimes/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="256">
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<caret line="16" column="54" selection-start-line="16" selection-start-column="54" selection-end-line="16" selection-end-column="54" />
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<state relative-caret-position="912">
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<caret line="57" lean-forward="true" selection-start-line="57" selection-end-line="57" />
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<folding>
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<element signature="e#111#112#0" expanded="true" />
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<element signature="e#127#128#0" expanded="true" />
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<element signature="e#171#172#0" expanded="true" />
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<element signature="e#382#383#0" expanded="true" />
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<element signature="e#420#421#0" expanded="true" />
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<element signature="e#782#783#0" expanded="true" />
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<element signature="e#826#827#0" expanded="true" />
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</folding>
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</state>
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</provider>
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@ -104,6 +76,7 @@
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<option value="$PROJECT_DIR$/generics/src/main.rs" />
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<option value="$PROJECT_DIR$/generics/src/point.rs" />
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<option value="$PROJECT_DIR$/generics/src/lib.rs" />
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<option value="$PROJECT_DIR$/lifetimes/src/main.rs" />
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</list>
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</option>
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</component>
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@ -137,12 +110,12 @@
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<path>
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
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<item name="generics" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="lifetimes" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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</path>
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<path>
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
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<item name="generics" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="lifetimes" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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</path>
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</expand>
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@ -176,7 +149,7 @@
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</component>
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<component name="PropertiesComponent">
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<property name="JavaScriptWeakerCompletionTypeGuess" value="true" />
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<property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1548952830934" />
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<property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1548960808738" />
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<property name="javascript.nodejs.core.library.configured.version" value="7.1.0" />
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<property name="js.eslint.eslintPackage" value="$USER_HOME$/.yarn-config/global/node_modules/.bin/eslint" />
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<property name="js.eslint.nodeInterpreter" value="project" />
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@ -204,7 +177,7 @@
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</list>
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</option>
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</component>
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<component name="RunManager" selected="Cargo Command.Run generics">
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<component name="RunManager" selected="Cargo Command.Run lifetimes">
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<configuration name="<template>" type="TestNG" default="true" selected="false">
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<option name="MAIN_CLASS_NAME" />
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<option name="VM_PARAMETERS" value="-ea" />
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@ -223,16 +196,6 @@
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<option name="Make" enabled="true" />
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</method>
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</configuration>
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<configuration name="Run enums" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
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<option name="channel" value="DEFAULT" />
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<option name="command" value="run --package enums --bin enums" />
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<option name="allFeatures" value="false" />
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<option name="nocapture" value="false" />
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<option name="backtrace" value="SHORT" />
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<option name="workingDirectory" value="file://$PROJECT_DIR$/enums" />
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<envs />
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<method v="2" />
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</configuration>
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<configuration name="Run errors" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
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<option name="channel" value="DEFAULT" />
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<option name="command" value="run --package errors --bin errors" />
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@ -263,6 +226,16 @@
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<envs />
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<method v="2" />
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</configuration>
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<configuration name="Run lifetimes" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
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<option name="channel" value="DEFAULT" />
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<option name="command" value="run --package lifetimes --bin lifetimes" />
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<option name="allFeatures" value="false" />
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<option name="nocapture" value="false" />
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<option name="backtrace" value="SHORT" />
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<option name="workingDirectory" value="file://$PROJECT_DIR$/lifetimes" />
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<envs />
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<method v="2" />
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</configuration>
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<configuration name="Run modules" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
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<option name="channel" value="DEFAULT" />
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<option name="command" value="run --package modules --bin modules" />
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@ -282,11 +255,11 @@
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</configuration>
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<recent_temporary>
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<list>
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<item itemvalue="Cargo Command.Run lifetimes" />
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<item itemvalue="Cargo Command.Run generics" />
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<item itemvalue="Cargo Command.Run largest_number" />
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<item itemvalue="Cargo Command.Run errors" />
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<item itemvalue="Cargo Command.Run modules" />
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<item itemvalue="Cargo Command.Run enums" />
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</list>
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</recent_temporary>
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</component>
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@ -510,6 +483,21 @@
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/generics/src/lib.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="128">
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<caret line="8" column="32" lean-forward="true" selection-start-line="8" selection-start-column="32" selection-end-line="8" selection-end-column="32" />
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<folding>
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<element signature="e#127#128#0" expanded="true" />
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<element signature="e#171#172#0" expanded="true" />
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<element signature="e#382#383#0" expanded="true" />
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<element signature="e#420#421#0" expanded="true" />
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<element signature="e#782#783#0" expanded="true" />
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<element signature="e#826#827#0" expanded="true" />
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</folding>
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/generics/src/point.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="544">
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@ -530,17 +518,13 @@
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/generics/src/lib.rs">
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<entry file="file://$PROJECT_DIR$/lifetimes/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="256">
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<caret line="16" column="54" selection-start-line="16" selection-start-column="54" selection-end-line="16" selection-end-column="54" />
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<state relative-caret-position="912">
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<caret line="57" lean-forward="true" selection-start-line="57" selection-end-line="57" />
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<folding>
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<element signature="e#111#112#0" expanded="true" />
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<element signature="e#127#128#0" expanded="true" />
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<element signature="e#171#172#0" expanded="true" />
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<element signature="e#382#383#0" expanded="true" />
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<element signature="e#420#421#0" expanded="true" />
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<element signature="e#782#783#0" expanded="true" />
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<element signature="e#826#827#0" expanded="true" />
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</folding>
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</state>
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</provider>
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7
lifetimes/Cargo.toml
Normal file
7
lifetimes/Cargo.toml
Normal file
@ -0,0 +1,7 @@
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[package]
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name = "lifetimes"
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version = "0.1.0"
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authors = ["Timothy Warren <twarren@nabancard.com>"]
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edition = "2018"
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[dependencies]
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57
lifetimes/src/main.rs
Normal file
57
lifetimes/src/main.rs
Normal file
@ -0,0 +1,57 @@
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use std::fmt::Display;
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struct ImportantExcerpt<'a> {
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part: &'a str,
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}
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impl<'a> ImportantExcerpt<'a> {
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fn level(&self) -> i32 {
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3
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}
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fn announce_and_return_part(&self, announcement: &str) -> &str {
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println!("Attention please: {}", announcement);
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self.part
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}
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}
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fn main() {
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let string1 = String::from("abcd");
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let string2 = "xyz";
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let result = longest(string1.as_str(), string2);
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println!("The longest string is {}", result);
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let string1 = String::from("long string is long");
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{
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let string2 = String::from("xyz");
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let result = longest(string1.as_str(), string2.as_str());
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println!("The longest string is {}", result);
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}
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let novel = String::from("Call me Ishmael. Some years ago...");
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let first_sentence = novel.split('.')
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.next()
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.expect("Could not find a '.'");
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let _i = ImportantExcerpt { part: first_sentence };
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}
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fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
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if x.len() > y.len() {
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x
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} else {
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y
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}
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}
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fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
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where T: Display
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{
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println!("Announcement! {}", ann);
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if x.len() > y.len() {
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x
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} else {
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y
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}
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}
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