diff options
Diffstat (limited to 'src/parse.rs')
| -rw-r--r-- | src/parse.rs | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/parse.rs b/src/parse.rs index bf70739..e92d87a 100644 --- a/src/parse.rs +++ b/src/parse.rs @@ -26,6 +26,10 @@ impl FromStr for Version { type Err = Error; fn from_str(text: &str) -> Result<Self, Self::Err> { + if text.is_empty() { + return Err(Error::new(ErrorKind::Empty)); + } + let mut pos = Position::Major; let (major, text) = numeric_identifier(text, pos)?; let text = dot(text, pos)?; @@ -262,23 +266,23 @@ fn identifier(input: &str, pos: Position) -> Result<(&str, &str), Error> { fn op(input: &str) -> (Op, &str) { let bytes = input.as_bytes(); - if bytes.get(0) == Some(&b'=') { + if bytes.first() == Some(&b'=') { (Op::Exact, &input[1..]) - } else if bytes.get(0) == Some(&b'>') { + } else if bytes.first() == Some(&b'>') { if bytes.get(1) == Some(&b'=') { (Op::GreaterEq, &input[2..]) } else { (Op::Greater, &input[1..]) } - } else if bytes.get(0) == Some(&b'<') { + } else if bytes.first() == Some(&b'<') { if bytes.get(1) == Some(&b'=') { (Op::LessEq, &input[2..]) } else { (Op::Less, &input[1..]) } - } else if bytes.get(0) == Some(&b'~') { + } else if bytes.first() == Some(&b'~') { (Op::Tilde, &input[1..]) - } else if bytes.get(0) == Some(&b'^') { + } else if bytes.first() == Some(&b'^') { (Op::Caret, &input[1..]) } else { (Op::DEFAULT, input) |