Initial commit

.gitignore

+/target

Cargo.lock

+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "d7050e_proc_macro"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "syn",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.24"
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+checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
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+checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
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+checksum = "e03e57e4fcbfe7749842d53e24ccb9aa12b7252dbe5e91d2acad31834c8b8fdd"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "unicode-xid"
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Cargo.toml

+[package]
+name = "d7050e_proc_macro"
+version = "0.1.0"
+authors = ["Per Lindgren <per.lindgren@ltu.se>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+proc-macro = true
+                                                                        
+[dependencies]
+proc-macro2 = "1"
+
+[dependencies.syn]
+features = ["extra-traits", "full"]
+version = "1"

examples/main.rs

+use d7050e_proc_macro::my_attribute;
+
+#[my_attribute(1, 2, "string")]
+fn main() {}

src/lib.rs

+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use proc_macro2::TokenStream as TokenStream2;
+use syn::{
+    braced, parenthesized,
+    parse::{self, Parse, ParseStream, Parser},
+    token::Brace,
+    Ident, Item, LitInt, Token,
+};
+
+#[proc_macro_attribute]
+pub fn my_attribute(args: TokenStream, input: TokenStream) -> TokenStream {
+    eprintln!("--- args {:?}", args);
+    eprintln!("--- input {:?}", input);
+    let r = app(args.into(), input.into());
+
+    r.unwrap()
+}
+
+fn app(args: TokenStream2, input: TokenStream2) -> parse::Result<TokenStream> {
+    Ok(input.into())
+}