From c1f7b42662d8c747597f3233abe65bc4827cb870 Mon Sep 17 00:00:00 2001
From: Nick Fitzgerald <fitzgen@gmail.com>
Date: Wed, 15 Aug 2018 11:45:45 -0700
Subject: [PATCH] web-sys: Provide more info in logs when type conversion fails

---
 crates/webidl/src/lib.rs  |  7 ++++++-
 crates/webidl/src/util.rs | 12 ++++++++++--
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/crates/webidl/src/lib.rs b/crates/webidl/src/lib.rs
index ed6ab3af..d077a1f7 100644
--- a/crates/webidl/src/lib.rs
+++ b/crates/webidl/src/lib.rs
@@ -812,7 +812,12 @@ impl<'src> WebidlParse<'src, &'src str> for weedle::interface::ConstMember<'src>
 
         let ty = match idl_type.to_syn_type(TypePosition::Return) {
             None => {
-                warn!("Can not convert const type to syn type: {:?}", idl_type);
+                warn!(
+                    "Cannot convert const type to syn type: {:?} in {:?} on {:?}",
+                    idl_type,
+                    self,
+                    self_name
+                );
                 return Ok(());
             },
             Some(ty) => ty,
diff --git a/crates/webidl/src/util.rs b/crates/webidl/src/util.rs
index 80e31c9c..011d3555 100644
--- a/crates/webidl/src/util.rs
+++ b/crates/webidl/src/util.rs
@@ -235,7 +235,11 @@ impl<'src> FirstPassRecord<'src> {
             ret @ _ => {
                 match ret.to_syn_type(TypePosition::Return) {
                     None => {
-                        warn!("Can not convert return type to syn type: {:?}", ret);
+                        warn!(
+                            "Cannot convert return type to syn type: {:?} on {:?}",
+                            ret,
+                            rust_name
+                        );
                         return Vec::new();
                     },
                     Some(ret) => Some(ret),
@@ -315,7 +319,11 @@ impl<'src> FirstPassRecord<'src> {
                 let syn_type = if let Some(syn_type) = idl_type.to_syn_type(TypePosition::Argument) {
                     syn_type
                 } else {
-                    warn!("Can not convert argument type to syn type: {:?}", idl_type);
+                    warn!(
+                        "Cannot convert argument type to syn type: {:?} on {:?}",
+                        idl_type,
+                        rust_name
+                    );
                     continue 'outer;
                 };
                 let argument_name = rust_ident(&argument_name.to_snake_case());