Enum EntryValue 

#[non_exhaustive]
pub enum EntryValue {
    Text(String),
    URational(URational),
    IRational(IRational),
    U8(u8),
    U16(u16),
    U32(u32),
    U64(u64),
    I8(i8),
    I16(i16),
    I32(i32),
    I64(i64),
    F32(f32),
    F64(f64),
    DateTime(DateTime<FixedOffset>),
    NaiveDateTime(NaiveDateTime),
    Undefined(Vec<u8>),
    URationalArray(Vec<URational>),
    IRationalArray(Vec<IRational>),
    U8Array(Vec<u8>),
    U16Array(Vec<u16>),
    U32Array(Vec<u32>),
}

Represent a parsed entry value.

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.

Text(String)

URational(URational)

IRational(IRational)

U8(u8)

U16(u16)

U32(u32)

U64(u64)

I8(i8)

I16(i16)

I32(i32)

I64(i64)

F32(f32)

F64(f64)

DateTime(DateTime<FixedOffset>)

NaiveDateTime(NaiveDateTime)

Undefined(Vec<u8>)

URationalArray(Vec<URational>)

IRationalArray(Vec<IRational>)

U8Array(Vec<u8>)

U16Array(Vec<u16>)

U32Array(Vec<u32>)

Implementations

impl EntryValue

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

pub fn as_datetime(&self) -> Option<ExifDateTime>

EXIF datetime accessor.

Returns Some(ExifDateTime::Aware) when the parsed value carried a timezone (e.g. composed with OffsetTimeOriginal); returns Some(ExifDateTime::Naive) for tags that ship without timezone info; returns None for non-datetime values.

use nom_exif::*;
use chrono::{DateTime, NaiveDateTime, FixedOffset};

let dt = DateTime::parse_from_str("2023-07-09T20:36:33+08:00", "%+").unwrap();
let ev = EntryValue::DateTime(dt);
assert!(matches!(ev.as_datetime(), Some(ExifDateTime::Aware(_))));

let ndt = NaiveDateTime::parse_from_str("2023-07-09T20:36:33", "%Y-%m-%dT%H:%M:%S").unwrap();
let ev = EntryValue::NaiveDateTime(ndt);
assert!(matches!(ev.as_datetime(), Some(ExifDateTime::Naive(_))));

pub fn as_u8(&self) -> Option<u8>

pub fn as_i8(&self) -> Option<i8>

pub fn as_u16(&self) -> Option<u16>

pub fn as_i16(&self) -> Option<i16>

pub fn as_u64(&self) -> Option<u64>

pub fn as_u32(&self) -> Option<u32>

pub fn as_i32(&self) -> Option<i32>

pub fn as_i64(&self) -> Option<i64>

pub fn as_f64(&self) -> Option<f64>

pub fn try_as_integer(&self) -> Option<i64>

Widen any integer EntryValue to i64. Returns None for non-integer values (and for U64 values exceeding i64::MAX).

pub fn try_as_float(&self) -> Option<f64>

Widen any numeric EntryValue (integer / rational / float) to f64. Rationals with denominator=0 return None.

pub fn as_urational(&self) -> Option<URational>

pub fn as_irational(&self) -> Option<IRational>

pub fn as_urational_slice(&self) -> Option<&[URational]>

pub fn as_irational_slice(&self) -> Option<&[IRational]>

pub fn as_u8_slice(&self) -> Option<&[u8]>

pub fn as_u16_slice(&self) -> Option<&[u16]>

pub fn as_u32_slice(&self) -> Option<&[u32]>

pub fn as_undefined(&self) -> Option<&[u8]>

Trait Implementations

impl Clone for EntryValue

fn clone(&self) -> EntryValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EntryValue

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

Formats the value using the given formatter.

impl Display for EntryValue

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

Formats the value using the given formatter.

impl From<&str> for EntryValue

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<(NaiveDateTime, Option<FixedOffset>)> for EntryValue

fn from(value: (NaiveDateTime, Option<FixedOffset>)) -> Self

Converts to this type from the input type.

impl From<DateTime<FixedOffset>> for EntryValue

fn from(value: DateTime<FixedOffset>) -> Self

Converts to this type from the input type.

impl From<String> for EntryValue

fn from(value: String) -> Self

Converts to this type from the input type.

impl From<f32> for EntryValue

fn from(value: f32) -> Self

Converts to this type from the input type.

impl From<f64> for EntryValue

fn from(value: f64) -> Self

Converts to this type from the input type.

impl From<i16> for EntryValue

fn from(value: i16) -> Self

Converts to this type from the input type.

impl From<i32> for EntryValue

fn from(value: i32) -> Self

Converts to this type from the input type.

impl From<i64> for EntryValue

fn from(value: i64) -> Self

Converts to this type from the input type.

impl From<i8> for EntryValue

fn from(value: i8) -> Self

Converts to this type from the input type.

impl From<u16> for EntryValue

fn from(value: u16) -> Self

Converts to this type from the input type.

impl From<u32> for EntryValue

fn from(value: u32) -> Self

Converts to this type from the input type.

impl From<u64> for EntryValue

fn from(value: u64) -> Self

Converts to this type from the input type.

impl From<u8> for EntryValue

fn from(value: u8) -> Self

Converts to this type from the input type.

impl PartialEq for EntryValue

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for EntryValue

Available on crate feature serde only.

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Structured per-variant serialization. Numeric variants serialize as JSON numbers, EntryValue::Text / EntryValue::DateTime / EntryValue::NaiveDateTime as strings, rationals as {"numerator", "denominator"} objects (and arrays thereof), EntryValue::Undefined as a continuous lowercase hex string with no truncation, and integer arrays as JSON arrays of numbers.

impl StructuralPartialEq for EntryValue