Merge pull request #1720 from alexcrichton/update-syn

Upgrade to syn/quote 1.0

Author: alexcrichton

crates/backend/Cargo.toml

@@ -19,7 +19,7 @@ extra-traits = ["syn/extra-traits"]
 bumpalo = "2.1"
 lazy_static = "1.0.0"
 log = "0.4"
-proc-macro2 = "0.4.8"
-quote = '0.6'
-syn = { version = '0.15', features = ['full'] }
+proc-macro2 = "1.0"
+quote = '1.0'
+syn = { version = '1.0', features = ['full'] }
 wasm-bindgen-shared = { path = "../shared", version = "=0.2.48" }

crates/backend/src/ast.rs

@@ -209,7 +209,7 @@ pub struct Function {
     pub name: String,
     pub name_span: Span,
     pub renamed_via_js_name: bool,
-    pub arguments: Vec<syn::ArgCaptured>,
+    pub arguments: Vec<syn::PatType>,
     pub ret: Option<syn::Type>,
     pub rust_attrs: Vec<syn::Attribute>,
     pub rust_vis: syn::Visibility,

crates/backend/src/codegen.rs

@@ -385,13 +385,16 @@ impl TryToTokens for ast::Export {
             },
         };
 
-        for (i, syn::ArgCaptured { ty, .. }) in self.function.arguments.iter().enumerate() {
+        let mut argtys = Vec::new();
+        for (i, arg) in self.function.arguments.iter().enumerate() {
+            argtys.push(&arg.ty);
             let i = i + offset;
             let ident = Ident::new(&format!("arg{}", i), Span::call_site());
-            match *ty {
+            let ty = &arg.ty;
+            match &*arg.ty {
                 syn::Type::Reference(syn::TypeReference {
                     mutability: Some(_),
-                    ref elem,
+                    elem,
                     ..
                 }) => {
                     args.push(quote! {
@@ -405,7 +408,7 @@ impl TryToTokens for ast::Export {
                         let #ident = &mut *#ident;
                     });
                 }
-                syn::Type::Reference(syn::TypeReference { ref elem, .. }) => {
+                syn::Type::Reference(syn::TypeReference { elem, .. }) => {
                     args.push(quote! {
                         #ident: <#elem as wasm_bindgen::convert::RefFromWasmAbi>::Abi
                     });
@@ -450,7 +453,6 @@ impl TryToTokens for ast::Export {
             <#syn_ret as WasmDescribe>::describe();
         };
         let nargs = self.function.arguments.len() as u32;
-        let argtys = self.function.arguments.iter().map(|arg| &arg.ty);
         let attrs = &self.function.rust_attrs;
 
         let start_check = if self.start {
@@ -874,8 +876,9 @@ impl TryToTokens for ast::ImportFunction {
         let mut arguments = Vec::new();
         let ret_ident = Ident::new("_ret", Span::call_site());
 
-        for (i, syn::ArgCaptured { pat, ty, .. }) in self.function.arguments.iter().enumerate() {
-            let name = match pat {
+        for (i, arg) in self.function.arguments.iter().enumerate() {
+            let ty = &arg.ty;
+            let name = match &*arg.pat {
                 syn::Pat::Ident(syn::PatIdent {
                     by_ref: None,
                     ident,
@@ -884,7 +887,7 @@ impl TryToTokens for ast::ImportFunction {
                 }) => ident.clone(),
                 syn::Pat::Wild(_) => syn::Ident::new(&format!("__genarg_{}", i), Span::call_site()),
                 _ => bail_span!(
-                    pat,
+                    arg.pat,
                     "unsupported pattern in #[wasm_bindgen] imported function",
                 ),
             };

crates/backend/src/defined.rs

@@ -193,7 +193,7 @@ impl ImportedTypes for syn::Path {
             seg.arguments.imported_types(f);
         }
         f(
-            &self.segments.last().unwrap().value().ident,
+            &self.segments.last().unwrap().ident,
             ImportedTypeKind::Reference,
         );
     }
@@ -272,12 +272,24 @@ impl ImportedTypes for ast::Function {
     }
 }
 
-impl ImportedTypes for syn::ArgCaptured {
+impl ImportedTypes for syn::FnArg {
     fn imported_types<F>(&self, f: &mut F)
     where
         F: FnMut(&Ident, ImportedTypeKind),
     {
-        self.ty.imported_types(f);
+        match self {
+            syn::FnArg::Receiver(_) => {}
+            syn::FnArg::Typed(p) => p.imported_types(f),
+        }
+    }
+}
+
+impl ImportedTypes for syn::PatType {
+    fn imported_types<F>(&self, f: &mut F)
+    where
+        F: FnMut(&Ident, ImportedTypeKind),
+    {
+        self.ty.imported_types(f)
     }
 }
 

crates/backend/src/encode.rs

@@ -197,11 +197,10 @@ fn shared_function<'a>(func: &'a ast::Function, _intern: &'a Interner) -> Functi
         .iter()
         .enumerate()
         .map(|(idx, arg)| {
-            if let syn::Pat::Ident(ref x) = arg.pat {
-                x.ident.to_string()
-            } else {
-                format!("arg{}", idx)
+            if let syn::Pat::Ident(x) = &*arg.pat {
+                return x.ident.to_string()
             }
+            format!("arg{}", idx)
         })
         .collect::<Vec<_>>();
     Function {

crates/macro-support/Cargo.toml

@@ -17,8 +17,8 @@ extra-traits = ["syn/extra-traits"]
 strict-macro = []
 
 [dependencies]
-syn = { version = '0.15.0', features = ['visit'] }
-quote = '0.6'
-proc-macro2 = "0.4.9"
+syn = { version = '1.0', features = ['visit'] }
+quote = '1.0'
+proc-macro2 = "1.0"
 wasm-bindgen-backend = { path = "../backend", version = "=0.2.48" }
 wasm-bindgen-shared = { path = "../shared", version = "=0.2.48" }