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</pre></div><pre class="rust"><code><span class="kw">use </span>std::{env::VarError, io, num::ParseIntError, path::PathBuf, str::ParseBoolError};
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<span class="kw">use </span>derive_more::{Display, Error};
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<span class="kw">use </span>toml::de::Error <span class="kw">as </span>TomlError;
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<span class="doccomment">/// Errors that can be returned from methods in this crate.
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</span><span class="attr">#[derive(Debug, Display, Error)]
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</span><span class="kw">pub enum </span>Error {
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<span class="doccomment">/// Environment variable does not exists or is invalid.
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</span><span class="attr">#[display(fmt = <span class="string">"Env var error: {_0}"</span>)]
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</span>EnvVarError(VarError),
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<span class="doccomment">/// File already exists on disk.
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</span><span class="attr">#[display(fmt = <span class="string">"File exists: {}"</span>, <span class="string">"_0.display()"</span>)]
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</span>FileExists(<span class="attr">#[error(not(source))] </span>PathBuf),
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<span class="doccomment">/// Invalid value.
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</span><span class="attr">#[allow(missing_docs)]
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#[display(fmt = <span class="string">"Expected {expected}, got {got} (@ {file}:{line}:{column})"</span>)]
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</span>InvalidValue {
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expected: <span class="kw-2">&</span><span class="lifetime">'static </span>str,
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got: String,
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file: <span class="kw-2">&</span><span class="lifetime">'static </span>str,
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line: u32,
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column: u32,
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},
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<span class="doccomment">/// I/O error.
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</span><span class="attr">#[display(fmt = <span class="string">""</span>)]
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</span>IoError(io::Error),
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<span class="doccomment">/// Value is not a boolean.
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</span><span class="attr">#[display(fmt = <span class="string">"Failed to parse boolean: {_0}"</span>)]
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</span>ParseBoolError(ParseBoolError),
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<span class="doccomment">/// Value is not an integer.
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</span><span class="attr">#[display(fmt = <span class="string">"Failed to parse integer: {_0}"</span>)]
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</span>ParseIntError(ParseIntError),
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<span class="doccomment">/// Value is not an address.
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</span><span class="attr">#[display(fmt = <span class="string">"Failed to parse address: {_0}"</span>)]
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</span>ParseAddressError(<span class="attr">#[error(not(source))] </span>String),
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<span class="doccomment">/// Error deserializing as TOML.
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</span><span class="attr">#[display(fmt = <span class="string">"TOML error: {_0}"</span>)]
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</span>TomlError(TomlError),
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}
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<span class="macro">macro_rules! </span>InvalidValue {
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(expected: <span class="macro-nonterminal">$expected</span>:expr, got: <span class="macro-nonterminal">$got</span>:expr,) => {
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<span class="kw">crate</span>::Error::InvalidValue {
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expected: <span class="macro-nonterminal">$expected</span>,
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got: <span class="macro-nonterminal">$got</span>.to_string(),
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file: <span class="macro">file!</span>(),
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line: <span class="macro">line!</span>(),
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column: <span class="macro">column!</span>(),
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}
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};
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}
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<span class="kw">impl </span>From<io::Error> <span class="kw">for </span>Error {
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<span class="kw">fn </span>from(err: io::Error) -> <span class="self">Self </span>{
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<span class="self">Self</span>::IoError(err)
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}
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}
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<span class="kw">impl </span>From<ParseBoolError> <span class="kw">for </span>Error {
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<span class="kw">fn </span>from(err: ParseBoolError) -> <span class="self">Self </span>{
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<span class="self">Self</span>::ParseBoolError(err)
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}
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}
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<span class="kw">impl </span>From<ParseIntError> <span class="kw">for </span>Error {
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<span class="kw">fn </span>from(err: ParseIntError) -> <span class="self">Self </span>{
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<span class="self">Self</span>::ParseIntError(err)
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}
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}
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<span class="kw">impl </span>From<TomlError> <span class="kw">for </span>Error {
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<span class="kw">fn </span>from(err: TomlError) -> <span class="self">Self </span>{
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<span class="self">Self</span>::TomlError(err)
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}
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}
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<span class="kw">impl </span>From<VarError> <span class="kw">for </span>Error {
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<span class="kw">fn </span>from(err: VarError) -> <span class="self">Self </span>{
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<span class="self">Self</span>::EnvVarError(err)
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}
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}
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<span class="kw">impl </span>From<Error> <span class="kw">for </span>io::Error {
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<span class="kw">fn </span>from(err: Error) -> <span class="self">Self </span>{
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<span class="kw">match </span>err {
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Error::EnvVarError(<span class="kw">_</span>) => io::Error::new(io::ErrorKind::InvalidInput, err.to_string()),
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Error::FileExists(<span class="kw">_</span>) => io::Error::new(io::ErrorKind::AlreadyExists, err.to_string()),
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Error::InvalidValue { .. } => {
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io::Error::new(io::ErrorKind::InvalidInput, err.to_string())
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}
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Error::IoError(io_error) => io_error,
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Error::ParseBoolError(<span class="kw">_</span>) => {
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io::Error::new(io::ErrorKind::InvalidInput, err.to_string())
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}
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Error::ParseIntError(<span class="kw">_</span>) => io::Error::new(io::ErrorKind::InvalidInput, err.to_string()),
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Error::ParseAddressError(<span class="kw">_</span>) => {
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io::Error::new(io::ErrorKind::InvalidInput, err.to_string())
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}
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Error::TomlError(<span class="kw">_</span>) => io::Error::new(io::ErrorKind::InvalidInput, err.to_string()),
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}
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}
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}
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</code></pre></div></section></main></body></html> |