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| author | Albert Larsan <74931857+albertlarsan68@users.noreply.github.com> | 2023-01-05 09:13:28 +0100 |
|---|---|---|
| committer | Albert Larsan <74931857+albertlarsan68@users.noreply.github.com> | 2023-01-11 09:32:08 +0000 |
| commit | cf2dff2b1e3fa55fa5415d524200070d0d7aacfe (patch) | |
| tree | 40a88d9a46aaf3e8870676eb2538378b75a263eb /tests/ui/traits/self-without-lifetime-constraint.rs | |
| parent | ca855e6e42787ecd062d81d53336fe6788ef51a9 (diff) | |
| download | rust-cf2dff2b1e3fa55fa5415d524200070d0d7aacfe.tar.gz rust-cf2dff2b1e3fa55fa5415d524200070d0d7aacfe.zip | |
Move /src/test to /tests
Diffstat (limited to 'tests/ui/traits/self-without-lifetime-constraint.rs')
| -rw-r--r-- | tests/ui/traits/self-without-lifetime-constraint.rs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/tests/ui/traits/self-without-lifetime-constraint.rs b/tests/ui/traits/self-without-lifetime-constraint.rs new file mode 100644 index 00000000000..99013d32ab8 --- /dev/null +++ b/tests/ui/traits/self-without-lifetime-constraint.rs @@ -0,0 +1,53 @@ +use std::error::Error; +use std::fmt; + +#[derive(Copy, Clone, Debug, PartialEq)] +pub enum ValueRef<'a> { + Null, + Integer(i64), + Real(f64), + Text(&'a [u8]), + Blob(&'a [u8]), +} + +impl<'a> ValueRef<'a> { + pub fn as_str(&self) -> FromSqlResult<&'a str, &'a &'a str> { + match *self { + ValueRef::Text(t) => { + std::str::from_utf8(t).map_err(|_| FromSqlError::InvalidType).map(|x| (x, &x)) + } + _ => Err(FromSqlError::InvalidType), + } + } +} + +#[derive(Debug)] +#[non_exhaustive] +pub enum FromSqlError { + InvalidType +} + +impl fmt::Display for FromSqlError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "InvalidType") + } +} + +impl Error for FromSqlError {} + +pub type FromSqlResult<T, K> = Result<(T, K), FromSqlError>; + +pub trait FromSql: Sized { + fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self, &Self>; +} + +impl FromSql for &str { + fn column_result(value: ValueRef<'_>) -> FromSqlResult<&str, &&str> { + //~^ ERROR `impl` item signature doesn't match `trait` item signature + value.as_str() + } +} + +pub fn main() { + println!("{}", "Hello World"); +} |
