const_panic/fmt_impls/
rust_1_64_fmt_impls.rs

1use crate::{
2    fmt::{FmtArg, FmtKind, PanicFmt},
3    PanicVal, StdWrapper,
4};
5
6use core::str::Utf8Error;
7
8#[cfg_attr(feature = "docsrs", doc(cfg(feature = "rust_1_64")))]
9impl PanicFmt for Utf8Error {
10    type This = Self;
11    type Kind = crate::fmt::IsStdType;
12    const PV_COUNT: usize = 5;
13}
14
15#[cfg_attr(feature = "docsrs", doc(cfg(feature = "rust_1_64")))]
16impl StdWrapper<&Utf8Error> {
17    /// Formats a `Utf8Error` (supports both Debug and Display formatting).
18    pub const fn to_panicvals(self, fmtarg: FmtArg) -> [PanicVal<'static>; Utf8Error::PV_COUNT] {
19        let this = *self.0;
20        match fmtarg.fmt_kind {
21            FmtKind::Display => {
22                let [pv0, pv1, pv2] = match this.error_len() {
23                    Some(x) => [
24                        PanicVal::write_str("invalid utf-8 sequence of "),
25                        PanicVal::from_usize(x, fmtarg),
26                        PanicVal::write_str(" bytes "),
27                    ],
28                    None => [
29                        PanicVal::write_str("incomplete utf-8 byte sequence "),
30                        PanicVal::EMPTY,
31                        PanicVal::EMPTY,
32                    ],
33                };
34
35                [
36                    pv0,
37                    pv1,
38                    pv2,
39                    PanicVal::write_str("from index "),
40                    PanicVal::from_usize(this.valid_up_to(), fmtarg),
41                ]
42            }
43            FmtKind::Debug => {
44                let [pv0, pv1, pv2] = match this.error_len() {
45                    Some(x) => [
46                        PanicVal::write_str(", error_len: Some("),
47                        PanicVal::from_usize(x, fmtarg),
48                        PanicVal::write_str(") }"),
49                    ],
50                    None => [
51                        PanicVal::write_str(", error_len: None }"),
52                        PanicVal::EMPTY,
53                        PanicVal::EMPTY,
54                    ],
55                };
56
57                [
58                    PanicVal::write_str("Utf8Error { valid_up_to: "),
59                    PanicVal::from_usize(this.valid_up_to(), fmtarg),
60                    pv0,
61                    pv1,
62                    pv2,
63                ]
64            }
65        }
66    }
67}
const_panic/fmt_impls/rust_1_64_fmt_impls.rs

const_panic/fmt_impls/
rust_1_64_fmt_impls.rs
