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, 76 insertions, 0 deletions

diff --git a/syn/tests/macros/mod.rs b/syn/tests/macros/mod.rs
new file mode 100644
index 0000000..3994615
--- /dev/null
+++ b/syn/tests/macros/mod.rs
@@ -0,0 +1,76 @@
+#[path = "../debug/mod.rs"]
+pub mod debug;
+
+use syn;
+use syn::parse::{Parse, Result};
+
+#[macro_export]
+macro_rules! errorf {
+    ($($tt:tt)*) => {{
+        use ::std::io::Write;
+        let stderr = ::std::io::stderr();
+        write!(stderr.lock(), $($tt)*).unwrap();
+    }};
+}
+
+#[macro_export]
+macro_rules! punctuated {
+    ($($e:expr,)+) => {{
+        let mut seq = ::syn::punctuated::Punctuated::new();
+        $(
+            seq.push($e);
+        )+
+        seq
+    }};
+
+    ($($e:expr),+) => {
+        punctuated!($($e,)+)
+    };
+}
+
+#[macro_export]
+macro_rules! snapshot {
+    ($($args:tt)*) => {
+        snapshot_impl!(() $($args)*)
+    };
+}
+
+#[macro_export]
+macro_rules! snapshot_impl {
+    (($expr:ident) as $t:ty, @$snapshot:literal) => {
+        let $expr = crate::macros::Tokens::parse::<$t>($expr).unwrap();
+        let debug = crate::macros::debug::Lite(&$expr);
+        insta::assert_debug_snapshot!(debug, @$snapshot);
+    };
+    (($($expr:tt)*) as $t:ty, @$snapshot:literal) => {{
+        let syntax_tree = crate::macros::Tokens::parse::<$t>($($expr)*).unwrap();
+        let debug = crate::macros::debug::Lite(&syntax_tree);
+        insta::assert_debug_snapshot!(debug, @$snapshot);
+        syntax_tree
+    }};
+    (($($expr:tt)*) , @$snapshot:literal) => {{
+        let syntax_tree = $($expr)*;
+        let debug = crate::macros::debug::Lite(&syntax_tree);
+        insta::assert_debug_snapshot!(debug, @$snapshot);
+        syntax_tree
+    }};
+    (($($expr:tt)*) $next:tt $($rest:tt)*) => {
+        snapshot_impl!(($($expr)* $next) $($rest)*)
+    };
+}
+
+pub trait Tokens {
+    fn parse<T: Parse>(self) -> Result<T>;
+}
+
+impl<'a> Tokens for &'a str {
+    fn parse<T: Parse>(self) -> Result<T> {
+        syn::parse_str(self)
+    }
+}
+
+impl Tokens for proc_macro2::TokenStream {
+    fn parse<T: Parse>(self) -> Result<T> {
+        syn::parse2(self)
+    }
+}