Enum HelpTopicText 

#[non_exhaustive]
pub enum HelpTopicText {
    Missing,
    Na,
    Invalid(String),
    Text(String),
}

A topic name, title, or source file name in help-topic metadata.

Missing columns, R NA, and malformed values remain distinct. An invalid optional field does not prevent reading the other fields or rows.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Missing

The column is absent.

Na

The stored character value is R NA.

Invalid(String)

The column has the wrong type, this row is absent, the column exceeds the row count, or the string cannot be decoded. The explanation is diagnostic text, not a stable machine-readable format.

Text(String)

A decoded value, including an empty string.

Implementations

impl HelpTopicText

pub fn as_str(&self) -> Option<&str>

Returns usable text, collapsing missing, NA, and invalid fields to None.

Trait Implementations

impl Clone for HelpTopicText

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 HelpTopicText

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

Formats the value using the given formatter.

impl Eq for HelpTopicText

impl PartialEq for HelpTopicText

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for HelpTopicText