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Add macro examples

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This commit is contained in:
Timothy Warren 2019-02-11 10:14:27 -05:00
parent 59bc706d0a
commit 12b2de3d68
9 changed files with 221 additions and 85 deletions
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2
.idea/misc.xml
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@ -41,6 +41,8 @@
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<cargoProject FILE="$PROJECT_DIR$/advanced_types/Cargo.toml" />
<cargoProject FILE="$PROJECT_DIR$/advanced_functions/Cargo.toml" />
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<unboundedVersionInspectionSettings>

10
.idea/rust.iml
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@ -165,6 +165,14 @@
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<excludeFolder url="file://$MODULE_DIR$/adder/target" />
@ -183,6 +191,7 @@
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<excludeFolder url="file://$MODULE_DIR$/guessing_game/target" />
<excludeFolder url="file://$MODULE_DIR$/gui/target" />
<excludeFolder url="file://$MODULE_DIR$/hello_macro/target" />
<excludeFolder url="file://$MODULE_DIR$/interior_mutability/target" />
<excludeFolder url="file://$MODULE_DIR$/lifetimes/target" />
<excludeFolder url="file://$MODULE_DIR$/loops/target" />
@ -191,6 +200,7 @@
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<excludeFolder url="file://$MODULE_DIR$/mutex/target" />
<excludeFolder url="file://$MODULE_DIR$/oop/target" />
<excludeFolder url="file://$MODULE_DIR$/pancakes/target" />
<excludeFolder url="file://$MODULE_DIR$/pattern_matching/target" />
<excludeFolder url="file://$MODULE_DIR$/rectangles/target" />
<excludeFolder url="file://$MODULE_DIR$/reference_counting/target" />

210
.idea/workspace.xml
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@ -14,23 +14,55 @@
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@ -60,14 +92,6 @@
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@ -111,6 +135,14 @@
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<option value="$PROJECT_DIR$/pancakes/src/main.rs" />
<option value="$PROJECT_DIR$/pancakes/Cargo.toml" />
<option value="$PROJECT_DIR$/hello_macro/hello_macro_derive/src/lib.rs" />
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@ -167,14 +199,26 @@
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="hello_macro" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="hello_macro" type="9f88c78c:ScopeViewTreeModel$FileNode" />
<item name="hello_macro_derive" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="hello_macro_derive" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
<item name="pancakes" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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@ -211,7 +255,7 @@
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<option name="VM_PARAMETERS" value="-ea" />
@ -270,13 +314,13 @@
<envs />
<method v="2" />
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<configuration name="Run pancakes" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
<option name="channel" value="DEFAULT" />
<option name="command" value="test --package advanced_lifetimes --lib tests" />
<option name="command" value="run --package pancakes --bin pancakes" />
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<option name="workingDirectory" value="file://$PROJECT_DIR$/advanced_lifetimes" />
<option name="workingDirectory" value="file://$PROJECT_DIR$/pancakes" />
<envs />
<method v="2" />
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@ -289,11 +333,11 @@
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<list>
<item itemvalue="Cargo Command.Run pancakes" />
<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" />
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@ -342,7 +386,7 @@
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@ -350,7 +394,7 @@
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7
hello_macro/Cargo.toml Normal file
View File

@ -0,0 +1,7 @@
[package]
name = "hello_macro"
version = "0.1.0"
authors = ["Timothy Warren <twarren@nabancard.com>"]
edition = "2018"
[dependencies]

12
hello_macro/hello_macro_derive/Cargo.toml Normal file
View File

@ -0,0 +1,12 @@
[package]
name = "hello_macro_derive"
version = "0.1.0"
authors = ["Timothy Warren <twarren@nabancard.com>"]
edition = "2018"
[lib]
proc-macro = true
[dependencies]
syn = "0.14.4"
quote = "0.6.3"

27
hello_macro/hello_macro_derive/src/lib.rs Normal file
View File

@ -0,0 +1,27 @@
extern crate proc_macro;
use crate::proc_macro::TokenStream;
use quote::quote;
use syn;
#[proc_macro_derive(HelloMacro)]
pub fn hello_macro_derive(input: TokenStream) -> TokenStream {
// Construct a representation of Rust code as a syntax tree
// that we can manipulate
let ast = syn::parse(input).unwrap();
// Build the trait implementation
impl_hello_macro(&ast)
}
fn impl_hello_macro(ast: &syn::DeriveInput) -> TokenStream {
let name = &ast.ident;
let gen = quote! (
impl HelloMacro for #name {
fn hello_macro() {
println!("Hello, Macro! My name is {}", stringify!(#name));
}
}
);
gen.into()
}

20
hello_macro/src/lib.rs Normal file
View File

@ -0,0 +1,20 @@
pub trait HelloMacro {
fn hello_macro();
}
/// Simplified version of the vec! macro
/// This is an example of a declarative macro
#[macro_export] // This makes the macro usable
macro_rules! vec {
( $( $x:expr ),* ) => { // This matches the argument list
{
let mut temp_vec = Vec::new();
$(
temp_vec.push($x);
)*
temp_vec
}
};
}

9
pancakes/Cargo.toml Normal file
View File

@ -0,0 +1,9 @@
[package]
name = "pancakes"
version = "0.1.0"
authors = ["Timothy Warren <twarren@nabancard.com>"]
edition = "2018"
[dependencies]
hello_macro = { path = "../hello_macro" }
hello_macro_derive = { path = "../hello_macro/hello_macro_derive" }

9
pancakes/src/main.rs Normal file
View File

@ -0,0 +1,9 @@
use hello_macro::HelloMacro;
use hello_macro_derive::HelloMacro;
#[derive(HelloMacro)]
struct Pancakes;
fn main() {
Pancakes::hello_macro();
}