Struct FieldSpec 

pub struct FieldSpec {

    pub name: Option<String>,
    pub field_type: FieldType,
    pub width: Option<usize>,
    pub precision: Option<usize>,
    pub alignment: Option<char>,
    pub sign: Option<char>,
    pub fill: Option<char>,
    pub zero_pad: bool,
    pub strftime_format: Option<String>,
    pub original_type_char: Option<char>,
    pub nested_subpattern: Option<String>,
    pub nested_regex_body: Option<String>,
    pub regex_lookbehind: Option<String>,
    pub regex_lookahead: Option<String>,
}

Fields

name: Option<String>

field_type: FieldType

width: Option<usize>

precision: Option<usize>

alignment: Option<char>

sign: Option<char>

fill: Option<char>

zero_pad: bool

strftime_format: Option<String>

original_type_char: Option<char>

nested_subpattern: Option<String>

When field_type is Nested: inner pattern text (e.g. "{inner:d}").

nested_regex_body: Option<String>

Unanchored regex body for the inner pattern (filled after recursive compile; issue #12).

regex_lookbehind: Option<String>

Concatenated (?<=…) / (?<!…) tokens after the type, before the field body (issue #9).

regex_lookahead: Option<String>

Concatenated (?=…) / (?!…) tokens after the type, after the field body (issue #9).

Implementations

impl FieldSpec

pub fn new() -> FieldSpec

pub fn is_default_unconstrained_string(&self) -> bool

True for {} / {name} with no width, precision, or alignment (the plain string branch in the regex builder). Used for empty-input parse handling (formatparse#16) without changing search/findall semantics.

impl FieldSpec

pub fn to_regex_pattern( &self, custom_patterns: &HashMap<String, String>, next_field_is_greedy: Option<bool>, allow_empty_delimited: bool, ) -> String

allow_empty_delimited: for default unconstrained string fields only (no width, precision, alignment), use .*? instead of .+? so an empty capture is allowed when the field is delimited by pattern literals (formatparse#83 / parse#136 remainder).

Trait Implementations

impl Clone for FieldSpec

fn clone(&self) -> FieldSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldSpec

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

Formats the value using the given formatter.

impl Default for FieldSpec

fn default() -> FieldSpec

Returns the “default value” for a type.