string_offsets/
config.rs

1//! Configuration types for enabling/disabling features are compile time.
2//!
3//! By disabling features, the compiler can generate faster code which can be important for certain use cases.
4//! Certain implementations/conversion operations will only be available if the corresponding features were enabled.
5
6/// Type-level boolean.
7pub trait Bool {
8    /// The value of the boolean.
9    const VALUE: bool;
10}
11/// Type-level true.
12pub struct True {}
13/// Type-level false.
14pub struct False {}
15impl Bool for True {
16    const VALUE: bool = true;
17}
18impl Bool for False {
19    const VALUE: bool = false;
20}
21
22/// Configures which features should be enabled for a [`StringOffsets`] instance.
23pub trait ConfigType {
24    /// Whether to enable character conversions.
25    type HasChars: Bool;
26    /// Whether to enable UTF-16 conversions.
27    type HasUtf16: Bool;
28    /// Whether to enable line conversions.
29    type HasLines: Bool;
30    /// Whether to enable whitespace checks.
31    type HasWhitespace: Bool;
32}
33
34/// Configuration type that enables all features.
35pub struct AllConfig {}
36impl ConfigType for AllConfig {
37    type HasChars = True;
38    type HasUtf16 = True;
39    type HasLines = True;
40    type HasWhitespace = True;
41}
42
43/// Configuration type that only enables line conversions.
44pub struct OnlyLines {}
45impl ConfigType for OnlyLines {
46    type HasChars = False;
47    type HasUtf16 = False;
48    type HasLines = True;
49    type HasWhitespace = False;
50}
string_offsets/config.rs

string_offsets/
config.rs
