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, 49 insertions, 0 deletions

diff --git a/proc-macro-error/proc-macro-error/src/nightly.rs b/proc-macro-error/proc-macro-error/src/nightly.rs
new file mode 100644
index 0000000..d053c2f
--- /dev/null
+++ b/proc-macro-error/proc-macro-error/src/nightly.rs
@@ -0,0 +1,49 @@
+use std::sync::atomic::{AtomicBool, Ordering};
+
+use proc_macro::{Diagnostic as PDiag, Level as PLevel};
+
+use crate::{abort_now, check_correctness, Diagnostic, Level, SuggestionKind};
+
+pub fn abort_if_dirty() {
+    check_correctness();
+    if IS_DIRTY.load(Ordering::SeqCst) {
+        abort_now()
+    }
+}
+
+pub(crate) fn cleanup() -> Vec<Diagnostic> {
+    vec![]
+}
+
+pub(crate) fn emit_diagnostic(diag: Diagnostic) {
+    let Diagnostic {
+        level,
+        span,
+        msg,
+        suggestions,
+    } = diag;
+
+    let level = match level {
+        Level::Warning => PLevel::Warning,
+        Level::Error => {
+            IS_DIRTY.store(true, Ordering::SeqCst);
+            PLevel::Error
+        }
+        _ => unreachable!(),
+    };
+
+    let mut res = PDiag::spanned(span.unwrap(), level, msg);
+
+    for (kind, msg, span) in suggestions {
+        res = match (kind, span) {
+            (SuggestionKind::Note, Some(span)) => res.span_note(span.unwrap(), msg),
+            (SuggestionKind::Help, Some(span)) => res.span_help(span.unwrap(), msg),
+            (SuggestionKind::Note, None) => res.note(msg),
+            (SuggestionKind::Help, None) => res.help(msg),
+        }
+    }
+
+    res.emit()
+}
+
+static IS_DIRTY: AtomicBool = AtomicBool::new(false);