litcheck_filecheck/ast/
modifier.rs

1use std::str::FromStr;
2
3use crate::common::*;
4
5#[derive(Debug)]
6pub struct InvalidCheckModifierError;
7
8bitflags::bitflags! {
9    /// Represents modificatons to the behavior of a [Check]
10    #[derive(Copy, Clone)]
11    pub struct CheckModifier: u16 {
12        const LITERAL = 1;
13        const COUNT = 2;
14    }
15}
16impl Default for CheckModifier {
17    fn default() -> Self {
18        Self::empty()
19    }
20}
21impl FromStr for CheckModifier {
22    type Err = InvalidCheckModifierError;
23
24    fn from_str(s: &str) -> Result<Self, Self::Err> {
25        match s {
26            "LITERAL" | "literal" => Ok(Self::LITERAL),
27            _ => Err(InvalidCheckModifierError),
28        }
29    }
30}
31impl fmt::Debug for CheckModifier {
32    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
33        use std::fmt::Write;
34        f.write_str("CheckModifier(")?;
35        let mut mods = 0;
36        if self.contains(Self::LITERAL) {
37            mods += 1;
38            f.write_str("LITERAL")?;
39        }
40        if self.contains(Self::COUNT) {
41            if mods > 0 {
42                f.write_str(" | ")?;
43            }
44            write!(f, "COUNT({})", self.count())?;
45        }
46        f.write_char(')')
47    }
48}
49impl CheckModifier {
50    pub fn is_literal(&self) -> bool {
51        self.contains(Self::LITERAL)
52    }
53
54    pub fn from_count(count: u8) -> Self {
55        let count = (count as u16) << 2;
56        Self::COUNT | CheckModifier::from_bits_retain(count)
57    }
58
59    pub fn count(&self) -> usize {
60        if self.contains(Self::COUNT) {
61            (self.bits() >> 2) as usize
62        } else {
63            1
64        }
65    }
66}
67impl Eq for CheckModifier {}
68impl PartialEq for CheckModifier {
69    fn eq(&self, other: &Self) -> bool {
70        self.count() == other.count() && self.is_literal() == other.is_literal()
71    }
72}
litcheck_filecheck/ast/modifier.rs

litcheck_filecheck/ast/
modifier.rs
