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, 107 insertions, 0 deletions

diff --git a/syn-mid/src/macros.rs b/syn-mid/src/macros.rs
new file mode 100644
index 0000000..87be7b4
--- /dev/null
+++ b/syn-mid/src/macros.rs
@@ -0,0 +1,107 @@
+macro_rules! ast_struct {
+    (
+        [$($attrs_pub:tt)*]
+        struct $name:ident $($rest:tt)*
+    ) => {
+        #[cfg_attr(feature = "clone-impls", derive(Clone))]
+        $($attrs_pub)* struct $name $($rest)*
+    };
+
+    ($($t:tt)*) => {
+        strip_attrs_pub!(ast_struct!($($t)*));
+    };
+}
+
+macro_rules! ast_enum {
+    (
+        [$($attrs_pub:tt)*]
+        enum $name:ident $($rest:tt)*
+    ) => (
+        #[cfg_attr(feature = "clone-impls", derive(Clone))]
+        $($attrs_pub)* enum $name $($rest)*
+    );
+
+    ($($t:tt)*) => {
+        strip_attrs_pub!(ast_enum!($($t)*));
+    };
+}
+
+macro_rules! ast_enum_of_structs {
+    (
+        $(#[$enum_attr:meta])*
+        $pub:ident $enum:ident $name:ident $body:tt
+    ) => {
+        ast_enum!($(#[$enum_attr])* $pub $enum $name $body);
+        ast_enum_of_structs_impl!($pub $enum $name $body);
+    };
+}
+
+macro_rules! ast_enum_of_structs_impl {
+    (
+        $pub:ident $enum:ident $name:ident {
+            $(
+                $(#[$variant_attr:meta])*
+                $variant:ident $( ($member:ident) )*,
+            )*
+        }
+    ) => {
+        check_keyword_matches!(pub $pub);
+        check_keyword_matches!(enum $enum);
+
+        $(
+            $(
+                impl From<$member> for $name {
+                    fn from(e: $member) -> $name {
+                        $name::$variant(e)
+                    }
+                }
+            )*
+        )*
+
+        generate_to_tokens! {
+            ()
+            tokens
+            $name { $($variant $($member)*,)* }
+        }
+    };
+}
+
+macro_rules! generate_to_tokens {
+    (($($arms:tt)*) $tokens:ident $name:ident { $variant:ident, $($next:tt)*}) => {
+        generate_to_tokens!(
+            ($($arms)* $name::$variant => {})
+            $tokens $name { $($next)* }
+        );
+    };
+
+    (($($arms:tt)*) $tokens:ident $name:ident { $variant:ident $member:ident, $($next:tt)*}) => {
+        generate_to_tokens!(
+            ($($arms)* $name::$variant(_e) => quote::ToTokens::to_tokens(_e, $tokens),)
+            $tokens $name { $($next)* }
+        );
+    };
+
+    (($($arms:tt)*) $tokens:ident $name:ident {}) => {
+        impl quote::ToTokens for $name {
+            fn to_tokens(&self, $tokens: &mut proc_macro2::TokenStream) {
+                match self {
+                    $($arms)*
+                }
+            }
+        }
+    };
+}
+
+macro_rules! strip_attrs_pub {
+    ($mac:ident!($(#[$m:meta])* $pub:ident $($t:tt)*)) => {
+        check_keyword_matches!(pub $pub);
+
+        $mac!([$(#[$m])* $pub] $($t)*);
+    };
+}
+
+macro_rules! check_keyword_matches {
+    (struct struct) => {};
+    (enum enum) => {};
+    (pub pub) => {};
+}