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, 50 insertions, 0 deletions

diff --git a/syn-mid/src/path.rs b/syn-mid/src/path.rs
new file mode 100644
index 0000000..8093b53
--- /dev/null
+++ b/syn-mid/src/path.rs
@@ -0,0 +1,50 @@
+use syn::{
+    ext::IdentExt,
+    parse::{ParseStream, Result},
+    punctuated::Punctuated,
+    Ident, Path, PathArguments, PathSegment, Token,
+};
+
+fn parse_path_segment(input: ParseStream<'_>) -> Result<PathSegment> {
+    if input.peek(Token![super])
+        || input.peek(Token![self])
+        || input.peek(Token![crate])
+        || input.peek(Token![extern])
+    {
+        let ident = input.call(Ident::parse_any)?;
+        return Ok(PathSegment::from(ident));
+    }
+
+    let ident = if input.peek(Token![Self]) {
+        input.call(Ident::parse_any)?
+    } else {
+        input.parse()?
+    };
+
+    if input.peek(Token![::]) && input.peek3(Token![<]) {
+        Ok(PathSegment {
+            ident,
+            arguments: PathArguments::AngleBracketed(input.parse()?),
+        })
+    } else {
+        Ok(PathSegment::from(ident))
+    }
+}
+
+pub(crate) fn parse_path(input: ParseStream<'_>) -> Result<Path> {
+    Ok(Path {
+        leading_colon: input.parse()?,
+        segments: {
+            let mut segments = Punctuated::new();
+            let value = parse_path_segment(input)?;
+            segments.push_value(value);
+            while input.peek(Token![::]) {
+                let punct: Token![::] = input.parse()?;
+                segments.push_punct(punct);
+                let value = parse_path_segment(input)?;
+                segments.push_value(value);
+            }
+            segments
+        },
+    })
+}