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authorHunter Kvalevog <hunter@kvog.sh>2026-10-02 21:53:51 -0500
committerHunter Kvalevog <hunter@kvog.sh>2026-10-02 21:53:51 -0500
commit4dfc11d74ab02ac5765ae5d08fb750c91f4744b4 (patch)
tree17ba62056d6b691dd0217b0e8f1b3a5826dce0f6 /rustlings/exercises/23_conversions/try_from_into.rs
parent02d8f1c62896576e1266553a56980eddbc2a88d7 (diff)
rustlings: move to rust/
Diffstat (limited to 'rustlings/exercises/23_conversions/try_from_into.rs')
-rw-r--r--rustlings/exercises/23_conversions/try_from_into.rs177
1 files changed, 0 insertions, 177 deletions
diff --git a/rustlings/exercises/23_conversions/try_from_into.rs b/rustlings/exercises/23_conversions/try_from_into.rs
deleted file mode 100644
index f3ae80a..0000000
--- a/rustlings/exercises/23_conversions/try_from_into.rs
+++ /dev/null
@@ -1,177 +0,0 @@
-// `TryFrom` is a simple and safe type conversion that may fail in a controlled
-// way under some circumstances. Basically, this is the same as `From`. The main
-// difference is that this should return a `Result` type instead of the target
-// type itself. You can read more about it in the documentation:
-// https://doc.rust-lang.org/std/convert/trait.TryFrom.html
-
-#![allow(clippy::useless_vec)]
-use std::convert::{TryFrom, TryInto};
-
-#[derive(Debug, PartialEq)]
-struct Color {
- red: u8,
- green: u8,
- blue: u8,
-}
-
-// We will use this error type for the `TryFrom` conversions.
-#[derive(Debug, PartialEq)]
-enum IntoColorError {
- // Incorrect length of slice
- BadLen,
- // Integer conversion error
- IntConversion,
-}
-
-// TODO: Tuple implementation.
-// Correct RGB color values must be integers in the 0..=255 range.
-impl TryFrom<(i16, i16, i16)> for Color {
- type Error = IntoColorError;
-
- fn try_from(tuple: (i16, i16, i16)) -> Result<Self, Self::Error> {}
-}
-
-// TODO: Array implementation.
-impl TryFrom<[i16; 3]> for Color {
- type Error = IntoColorError;
-
- fn try_from(arr: [i16; 3]) -> Result<Self, Self::Error> {}
-}
-
-// TODO: Slice implementation.
-// This implementation needs to check the slice length.
-impl TryFrom<&[i16]> for Color {
- type Error = IntoColorError;
-
- fn try_from(slice: &[i16]) -> Result<Self, Self::Error> {}
-}
-
-fn main() {
- // Using the `try_from` function.
- let c1 = Color::try_from((183, 65, 14));
- println!("{c1:?}");
-
- // Since `TryFrom` is implemented for `Color`, we can use `TryInto`.
- let c2: Result<Color, _> = [183, 65, 14].try_into();
- println!("{c2:?}");
-
- let v = vec![183, 65, 14];
- // With slice we should use the `try_from` function
- let c3 = Color::try_from(&v[..]);
- println!("{c3:?}");
- // or put the slice within round brackets and use `try_into`.
- let c4: Result<Color, _> = (&v[..]).try_into();
- println!("{c4:?}");
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
- use IntoColorError::*;
-
- #[test]
- fn test_tuple_out_of_range_positive() {
- assert_eq!(Color::try_from((256, 1000, 10000)), Err(IntConversion));
- }
-
- #[test]
- fn test_tuple_out_of_range_negative() {
- assert_eq!(Color::try_from((-1, -10, -256)), Err(IntConversion));
- }
-
- #[test]
- fn test_tuple_sum() {
- assert_eq!(Color::try_from((-1, 255, 255)), Err(IntConversion));
- }
-
- #[test]
- fn test_tuple_correct() {
- let c: Result<Color, _> = (183, 65, 14).try_into();
- assert!(c.is_ok());
- assert_eq!(
- c.unwrap(),
- Color {
- red: 183,
- green: 65,
- blue: 14,
- }
- );
- }
-
- #[test]
- fn test_array_out_of_range_positive() {
- let c: Result<Color, _> = [1000, 10000, 256].try_into();
- assert_eq!(c, Err(IntConversion));
- }
-
- #[test]
- fn test_array_out_of_range_negative() {
- let c: Result<Color, _> = [-10, -256, -1].try_into();
- assert_eq!(c, Err(IntConversion));
- }
-
- #[test]
- fn test_array_sum() {
- let c: Result<Color, _> = [-1, 255, 255].try_into();
- assert_eq!(c, Err(IntConversion));
- }
-
- #[test]
- fn test_array_correct() {
- let c: Result<Color, _> = [183, 65, 14].try_into();
- assert!(c.is_ok());
- assert_eq!(
- c.unwrap(),
- Color {
- red: 183,
- green: 65,
- blue: 14
- }
- );
- }
-
- #[test]
- fn test_slice_out_of_range_positive() {
- let arr = [10000, 256, 1000];
- assert_eq!(Color::try_from(&arr[..]), Err(IntConversion));
- }
-
- #[test]
- fn test_slice_out_of_range_negative() {
- let arr = [-256, -1, -10];
- assert_eq!(Color::try_from(&arr[..]), Err(IntConversion));
- }
-
- #[test]
- fn test_slice_sum() {
- let arr = [-1, 255, 255];
- assert_eq!(Color::try_from(&arr[..]), Err(IntConversion));
- }
-
- #[test]
- fn test_slice_correct() {
- let v = vec![183, 65, 14];
- let c: Result<Color, _> = Color::try_from(&v[..]);
- assert!(c.is_ok());
- assert_eq!(
- c.unwrap(),
- Color {
- red: 183,
- green: 65,
- blue: 14,
- }
- );
- }
-
- #[test]
- fn test_slice_excess_length() {
- let v = vec![0, 0, 0, 0];
- assert_eq!(Color::try_from(&v[..]), Err(BadLen));
- }
-
- #[test]
- fn test_slice_insufficient_length() {
- let v = vec![0, 0];
- assert_eq!(Color::try_from(&v[..]), Err(BadLen));
- }
-}