Add structopt dependency in version 0.3.7

This patch series replaces argparse with structopt in the argument
handling code. As a first step, we need structopt as a dependency.

Import subrepo structopt/:structopt at efbdda4753592e27bc430fb01f7b9650b2f3174d
Import subrepo bitflags/:bitflags at 30668016aca6bd3b02c766e8347e0b4080d4c296
Import subrepo clap/:clap at 784524f7eb193e35f81082cc69454c8c21b948f7
Import subrepo heck/:heck at 093d56fbf001e1506e56dbfa38631d99b1066df1
Import subrepo proc-macro-error/:proc-macro-error at 6c4cfe79a622c5de8ae68557993542be46eacae2
Import subrepo proc-macro2/:proc-macro2 at d5d48eddca4566e5438e8a2cbed4a74e049544de
Import subrepo quote/:quote at 727436c6c137b20f0f34dde5d8fda2679b9747ad
Import subrepo rustversion/:rustversion at 0c5663313516263059ce9059ef81fc7a1cf655ca
Import subrepo syn-mid/:syn-mid at 5d3d85414a9e6674e1857ec22a87b96e04a6851a
Import subrepo syn/:syn at e87c27e87f6f4ef8919d0372bdb056d53ef0d8f3
Import subrepo textwrap/:textwrap at abcd618beae3f74841032aa5b53c1086b0a57ca2
Import subrepo unicode-segmentation/:unicode-segmentation at 637c9874c4fe0c205ff27787faf150a40295c6c3
Import subrepo unicode-width/:unicode-width at 3033826f8bf05e82724140a981d5941e48fce393
Import subrepo unicode-xid/:unicode-xid at 4baae9fffb156ba229665b972a9cd5991787ceb7

1 files changed, 109 insertions, 0 deletions

diff --git a/syn/tests/test_receiver.rs b/syn/tests/test_receiver.rs
new file mode 100644
index 0000000..168db8f
--- /dev/null
+++ b/syn/tests/test_receiver.rs
@@ -0,0 +1,109 @@
+mod features;
+
+use syn::{FnArg, Receiver, TraitItemMethod};
+
+#[test]
+fn test_by_value() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn by_value(self: Self););
+    match sig.receiver() {
+        Some(FnArg::Typed(_)) => (),
+        value => panic!("expected FnArg::Typed, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_by_mut_value() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn by_mut(mut self: Self););
+    match sig.receiver() {
+        Some(FnArg::Typed(_)) => (),
+        value => panic!("expected FnArg::Typed, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_by_ref() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn by_ref(self: &Self););
+    match sig.receiver() {
+        Some(FnArg::Typed(_)) => (),
+        value => panic!("expected FnArg::Typed, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_by_box() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn by_box(self: Box<Self>););
+    match sig.receiver() {
+        Some(FnArg::Typed(_)) => (),
+        value => panic!("expected FnArg::Typed, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_by_pin() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn by_pin(self: Pin<Self>););
+    match sig.receiver() {
+        Some(FnArg::Typed(_)) => (),
+        value => panic!("expected FnArg::Typed, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_explicit_type() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn explicit_type(self: Pin<MyType>););
+    match sig.receiver() {
+        Some(FnArg::Typed(_)) => (),
+        value => panic!("expected FnArg::Typed, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_value_shorthand() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn value_shorthand(self););
+    match sig.receiver() {
+        Some(FnArg::Receiver(Receiver {
+            reference: None,
+            mutability: None,
+            ..
+        })) => (),
+        value => panic!("expected FnArg::Receiver without ref/mut, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_mut_value_shorthand() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn mut_value_shorthand(mut self););
+    match sig.receiver() {
+        Some(FnArg::Receiver(Receiver {
+            reference: None,
+            mutability: Some(_),
+            ..
+        })) => (),
+        value => panic!("expected FnArg::Receiver with mut, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_ref_shorthand() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn ref_shorthand(&self););
+    match sig.receiver() {
+        Some(FnArg::Receiver(Receiver {
+            reference: Some(_),
+            mutability: None,
+            ..
+        })) => (),
+        value => panic!("expected FnArg::Receiver with ref, got {:?}", value),
+    }
+}
+
+#[test]
+fn test_ref_mut_shorthand() {
+    let TraitItemMethod { sig, .. } = syn::parse_quote!(fn ref_mut_shorthand(&mut self););
+    match sig.receiver() {
+        Some(FnArg::Receiver(Receiver {
+            reference: Some(_),
+            mutability: Some(_),
+            ..
+        })) => (),
+        value => panic!("expected FnArg::Receiver with ref+mut, got {:?}", value),
+    }
+}