1 files changed, 124 insertions, 0 deletions
diff --git a/vendor/semver/src/error.rs b/vendor/semver/src/error.rs
new file mode 100644
index 000000000..a514e3f11
--- /dev/null
+++ b/vendor/semver/src/error.rs
@@ -0,0 +1,124 @@
+use crate::parse::Error;
+use core::fmt::{self, Debug, Display};
+
+pub(crate) enum ErrorKind {
+    UnexpectedEnd(Position),
+    UnexpectedChar(Position, char),
+    UnexpectedCharAfter(Position, char),
+    ExpectedCommaFound(Position, char),
+    LeadingZero(Position),
+    Overflow(Position),
+    EmptySegment(Position),
+    IllegalCharacter(Position),
+    WildcardNotTheOnlyComparator(char),
+    UnexpectedAfterWildcard,
+    ExcessiveComparators,
+}
+
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub(crate) enum Position {
+    Major,
+    Minor,
+    Patch,
+    Pre,
+    Build,
+}
+
+#[cfg(feature = "std")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+impl std::error::Error for Error {}
+
+impl Display for Error {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        match &self.kind {
+            ErrorKind::UnexpectedEnd(pos) => {
+                write!(formatter, "unexpected end of input while parsing {}", pos)
+            }
+            ErrorKind::UnexpectedChar(pos, ch) => {
+                write!(
+                    formatter,
+                    "unexpected character {} while parsing {}",
+                    QuotedChar(*ch),
+                    pos,
+                )
+            }
+            ErrorKind::UnexpectedCharAfter(pos, ch) => {
+                write!(
+                    formatter,
+                    "unexpected character {} after {}",
+                    QuotedChar(*ch),
+                    pos,
+                )
+            }
+            ErrorKind::ExpectedCommaFound(pos, ch) => {
+                write!(
+                    formatter,
+                    "expected comma after {}, found {}",
+                    pos,
+                    QuotedChar(*ch),
+                )
+            }
+            ErrorKind::LeadingZero(pos) => {
+                write!(formatter, "invalid leading zero in {}", pos)
+            }
+            ErrorKind::Overflow(pos) => {
+                write!(formatter, "value of {} exceeds u64::MAX", pos)
+            }
+            ErrorKind::EmptySegment(pos) => {
+                write!(formatter, "empty identifier segment in {}", pos)
+            }
+            ErrorKind::IllegalCharacter(pos) => {
+                write!(formatter, "unexpected character in {}", pos)
+            }
+            ErrorKind::WildcardNotTheOnlyComparator(ch) => {
+                write!(
+                    formatter,
+                    "wildcard req ({}) must be the only comparator in the version req",
+                    ch,
+                )
+            }
+            ErrorKind::UnexpectedAfterWildcard => {
+                formatter.write_str("unexpected character after wildcard in version req")
+            }
+            ErrorKind::ExcessiveComparators => {
+                formatter.write_str("excessive number of version comparators")
+            }
+        }
+    }
+}
+
+impl Display for Position {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str(match self {
+            Position::Major => "major version number",
+            Position::Minor => "minor version number",
+            Position::Patch => "patch version number",
+            Position::Pre => "pre-release identifier",
+            Position::Build => "build metadata",
+        })
+    }
+}
+
+impl Debug for Error {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("Error(\"")?;
+        Display::fmt(self, formatter)?;
+        formatter.write_str("\")")?;
+        Ok(())
+    }
+}
+
+struct QuotedChar(char);
+
+impl Display for QuotedChar {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        // Standard library versions prior to https://github.com/rust-lang/rust/pull/95345
+        // print character 0 as '\u{0}'. We prefer '\0' to keep error messages
+        // the same across all supported Rust versions.
+        if self.0 == '\0' {
+            formatter.write_str("'\\0'")
+        } else {
+            write!(formatter, "{:?}", self.0)
+        }
+    }
+}