Enum ConfigError 

pub enum ConfigError {
    Io(String, String),
    Syntax {
        path: String,
        line: usize,
        message: String,
    },
    IncludeCycle(Vec<String>),
    IncludeTooDeep(usize),
    AppendToNonSeq(String),
    TooDeep(usize),
    Usage(String),
    Invalid {
        setting: String,
        origin: Origin,
        message: String,
    },
}

What can go wrong while reading a configuration.

Variants

Io(String, String)

The file could not be read. Carries the path and the OS message.

Syntax

The text is not in the subset this reader accepts.

Fields

path: String

Path of the file the line is in.

line: usize

1-based line.

message: String

What was wrong, in the reader’s own words.

IncludeCycle(Vec<String>)

An include: chain came back to a file or directory already being read.

IncludeTooDeep(usize)

An include: chain went deeper than MAX_INCLUDE_DEPTH.

AppendToNonSeq(String)

+name was written where name is not a sequence.

TooDeep(usize)

The tree nests deeper than MAX_NESTING_DEPTH.

Usage(String)

A command-line flag or a setting path that cannot be read.

Invalid

A value that parsed but is not one its setting accepts. Carries the setting path, where the value came from, and what was expected — the origin may be a file line, an environment variable or a flag.

Fields

setting: String

Dotted setting path.

origin: Origin

Where the refused value came from.

message: String

What the setting accepts.

Trait Implementations

impl Clone for ConfigError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ConfigError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ConfigError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ConfigError

impl Error for ConfigError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for ConfigError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ConfigError