Update syn and bump version

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cssparser"
-version = "0.25.0"
+version = "0.25.1"
 authors = [ "Simon Sapin <simon.sapin@exyr.org>" ]
 
 description = "Rust implementation of CSS Syntax Level 3"
@@ -30,7 +30,7 @@ serde = {version = "1.0", optional = true}
 smallvec = "0.6"
 
 [build-dependencies]
-syn = { version = "0.14", features = ["extra-traits", "fold", "full"] }
+syn = { version = "0.15.12", features = ["extra-traits", "fold", "full"] }
 quote = "0.6"
 proc-macro2 = "0.4"
 

build/match_byte.rs

@@ -8,6 +8,7 @@ use std::io::{Read, Write};
 use std::path::Path;
 use syn;
 use syn::fold::Fold;
+use syn::parse::{Parse, ParseStream, Result};
 
 use proc_macro2::{Span, TokenStream};
 
@@ -30,17 +31,23 @@ struct MatchByte {
     arms: Vec<syn::Arm>,
 }
 
-impl syn::synom::Synom for MatchByte {
-    named!(parse -> Self, do_parse!(
-        expr: syn!(syn::Expr) >>
-        punct!(,) >>
-        arms: many0!(syn!(syn::Arm)) >> (
-            MatchByte {
-                expr,
+impl Parse for MatchByte {
+    fn parse(input: ParseStream) -> Result<Self> {
+        Ok(MatchByte {
+            expr: {
+                let expr = input.parse()?;
+                input.parse::<Token![,]>()?;
+                expr
+            },
+            arms: {
+                let mut arms = Vec::new();
+                while !input.is_empty() {
+                    arms.push(input.call(syn::Arm::parse)?);
+                }
                 arms
             }
-        )
-    ));
+        })
+    }
 }
 
 fn get_byte_from_expr_lit(expr: &Box<syn::Expr>) -> u8 {

macros/Cargo.toml

@@ -15,5 +15,5 @@ proc-macro = true
 procedural-masquerade = {path = "../procedural-masquerade", version = "0.1"}
 phf_codegen = "0.7"
 quote = "0.6"
-syn = {version = "0.14", features = ["full", "extra-traits"]}
+syn = {version = "0.15.12", features = ["full", "extra-traits"]}
 proc-macro2 = "0.4"