Update to syn 0.15 (rust-lang#564)

Author: alexcrichton

crates/assert-instr-macro/Cargo.toml

@@ -10,4 +10,4 @@ test = false
 [dependencies]
 proc-macro2 = { version = "0.4", features = ["nightly"] }
 quote = "0.6"
-syn = { version = "0.14", features = ["full"] }
+syn = { version = "0.15", features = ["full"] }

crates/assert-instr-macro/src/lib.rs

@@ -12,7 +12,6 @@ extern crate proc_macro;
 extern crate proc_macro2;
 #[macro_use]
 extern crate quote;
-#[macro_use]
 extern crate syn;
 
 use proc_macro2::TokenStream;
@@ -150,25 +149,23 @@ struct Invoc {
     args: Vec<(syn::Ident, syn::Expr)>,
 }
 
-impl syn::synom::Synom for Invoc {
-    named!(parse -> Self, do_parse!(
-        instr: alt!(
-            map!(syn!(syn::Ident), |s| s.to_string())
-            |
-            map!(syn!(syn::LitStr), |s| s.value())
-        ) >>
-        args: many0!(do_parse!(
-            syn!(syn::token::Comma) >>
-            name: syn!(syn::Ident) >>
-            syn!(syn::token::Eq) >>
-            expr: syn!(syn::Expr) >>
-            (name, expr)
-        )) >>
-        (Invoc {
-            instr,
-            args,
-        })
-    ));
+impl syn::parse::Parse for Invoc {
+    fn parse(input: syn::parse::ParseStream) -> syn::parse::Result<Self> {
+        use syn::Token;
+
+        let instr = match input.parse::<syn::Ident>() {
+            Ok(s) => s.to_string(),
+            Err(_) => input.parse::<syn::LitStr>()?.value(),
+        };
+        let mut args = Vec::new();
+        while input.parse::<Token![,]>().is_ok() {
+            let name = input.parse::<syn::Ident>()?;
+            input.parse::<Token![=]>()?;
+            let expr = input.parse::<syn::Expr>()?;
+            args.push((name, expr));
+        }
+        Ok(Invoc { instr, args })
+    }
 }
 
 struct Append<T>(T);

crates/stdsimd-verify/Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Alex Crichton <[email protected]>"]
 [dependencies]
 proc-macro2 = "0.4"
 quote = "0.6"
-syn = { version = "0.14", features = ["full"] }
+syn = { version = "0.15", features = ["full"] }
 
 [lib]
 proc-macro = true

crates/stdsimd-verify/src/lib.rs

@@ -242,15 +242,16 @@ struct RustcArgsRequiredConst {
     args: Vec<usize>,
 }
 
-impl syn::synom::Synom for RustcArgsRequiredConst {
-    named!(parse -> Self, do_parse!(
-        items: parens!(
-            call!(syn::punctuated::Punctuated::<syn::LitInt, syn::token::Comma>::parse_terminated)
-        ) >>
-        (RustcArgsRequiredConst {
-            args: items.1.into_iter()
+impl syn::parse::Parse for RustcArgsRequiredConst {
+    fn parse(input: syn::parse::ParseStream) -> syn::parse::Result<Self> {
+        let content;
+        parenthesized!(content in input);
+        let list = syn::punctuated::Punctuated::<syn::LitInt, Token![,]>
+            ::parse_terminated(&content)?;
+        Ok(RustcArgsRequiredConst {
+            args: list.into_iter()
                 .map(|a| a.value() as usize)
                 .collect(),
         })
-    ));
+    }
 }

crates/stdsimd-verify/tests/x86-intel.rs

@@ -1,4 +1,3 @@
-#![feature(use_extern_macros)]
 #![allow(bad_style)]
 #![cfg_attr(
     feature = "cargo-clippy",