Enum NumericLiteral 

pub enum NumericLiteral {
    Integer(i128),
    Byte(i8),
    Short(i16),
    NonNegativeInteger(u128),
    UnsignedLong(u64),
    UnsignedInt(u32),
    UnsignedShort(u16),
    UnsignedByte(u8),
    PositiveInteger(u128),
    NegativeInteger(i128),
    NonPositiveInteger(i128),
    Long(i64),
    Decimal(Decimal),
    Double(f64),
    Float(f32),
}

Represents RDF numeric literals with XSD datatype semantics.

This enum supports all XSD numeric types and provides type-safe conversions between them. Uses #[serde(untagged)] for flexible deserialization from JSON/other formats.

Variants

Integer(i128)

Byte(i8)

Short(i16)

NonNegativeInteger(u128)

UnsignedLong(u64)

UnsignedInt(u32)

UnsignedShort(u16)

UnsignedByte(u8)

PositiveInteger(u128)

NegativeInteger(i128)

NonPositiveInteger(i128)

Long(i64)

Decimal(Decimal)

Double(f64)

Float(f32)

Implementations

impl NumericLiteral

Constructor Methods

pub fn datatype(&self) -> &str

Returns the XSD datatype IRI for this numeric literal.

Each variant maps to its corresponding XML Schema datatype.

pub fn decimal(d: Decimal) -> NumericLiteral

Creates a decimal literal from a Decimal value.

pub fn non_positive_integer(n: i128) -> Result<NumericLiteral, RDFError>

Creates a non-positive integer literal from an i128 value.

Errors

Returns error if value is greater than 0.

pub fn non_negative_integer(n: u128) -> NumericLiteral

Creates a non-negative integer literal from a u128 value.

pub fn positive_integer(n: u128) -> Result<NumericLiteral, RDFError>

Creates a positive integer literal (value > 0).

Errors

Returns error if value is 0, as XSD positiveInteger requires > 0.

pub fn negative_integer(n: i128) -> Result<NumericLiteral, RDFError>

Creates a negative integer literal from an i128 value.

Errors

Returns error if value is greater than or equal to 0.

pub fn unsigned_byte(n: u8) -> NumericLiteral

Creates an unsigned byte literal (0-255).

pub fn unsigned_short(n: u16) -> NumericLiteral

Creates an unsigned short literal (0-65535).

pub fn unsigned_int(n: u32) -> NumericLiteral

Creates an unsigned int literal.

pub fn unsigned_long(n: u64) -> NumericLiteral

Creates an unsigned long literal.

pub fn decimal_from_parts( whole: i64, fraction: u32, ) -> Result<NumericLiteral, RDFError>

Creates a decimal from separate whole and fractional parts.

Errors

Returns error if the constructed string cannot be parsed as Decimal.

pub fn byte(d: i8) -> NumericLiteral

Creates a byte literal (-128 to 127).

pub fn short(d: i16) -> NumericLiteral

Creates a short literal (-32768 to 32767).

pub fn long(d: i64) -> NumericLiteral

Creates a long literal (64-bit signed integer).

pub fn float(d: f32) -> NumericLiteral

Creates a float literal (32-bit).

pub fn integer(n: i128) -> NumericLiteral

Creates an integer literal (unbounded).

pub fn double(d: f64) -> NumericLiteral

Creates a double literal (64-bit).

impl NumericLiteral

Conversion Methods

pub fn decimal_from_f64(d: f64) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_f32(d: f32) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_isize(d: isize) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_i32(d: i32) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_i64(d: i64) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_i128(d: i128) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_u32(d: u32) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_u64(d: u64) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn decimal_from_u128(d: u128) -> Result<NumericLiteral, RDFError>

Converts value to Decimal literal.

Errors

Returns error if value cannot be represented as Decimal (e.g., NaN, infinity for floats).

pub fn integer_from_i64(d: i64) -> NumericLiteral

Creates an integer literal from i64.

pub fn integer_from_i128(d: i128) -> NumericLiteral

Creates an integer literal from i128.

pub fn to_decimal(&self) -> Option<Decimal>

Converts any numeric literal to Decimal for uniform comparison.

This method enables cross-type numeric comparisons by normalizing all variants to the Decimal type.

impl NumericLiteral

Utility Methods

pub fn lexical_form(&self) -> String

Returns the lexical form (string representation) of this literal.

This is equivalent to the Display implementation.

pub fn less_than(&self, other: &NumericLiteral) -> bool

Checks if this numeric literal is less than another.

Optimized for integer comparisons; falls back to decimal conversion for mixed-type comparisons.

pub fn less_than_or_eq(&self, other: &NumericLiteral) -> bool

Checks if this numeric literal is less than or equal to another.

pub fn total_digits(&self) -> Option<usize>

Returns the total number of digits in the literal.

For decimals, this excludes the decimal point and sign. Returns None for float/double as they don’t have a fixed digit count.

pub fn fraction_digits(&self) -> Option<usize>

Returns the number of fractional digits.

Returns 0 for integer types, counts digits after decimal point for decimals, and None for float/double.

Trait Implementations

impl Clone for NumericLiteral

fn clone(&self) -> NumericLiteral

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NumericLiteral

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for NumericLiteral

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for NumericLiteral

Display implementation for human-readable output.

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

Formats the value using the given formatter.

impl From<NumericLiteral> for Literal

Conversion to oxrdf::Literal for RDF serialization.

fn from(n: NumericLiteral) -> Self

Converts to this type from the input type.

impl Hash for NumericLiteral

Hash implementation consistent with the numeric-value-based equality above.

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for NumericLiteral

PartialEq that compares numeric value when possible (canonicalizing to Decimal).

fn eq(&self, other: &Self) -> 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 PartialOrd for NumericLiteral

Ordering based on decimal conversion for cross-type comparisons.

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for NumericLiteral

Custom serialization to preserve numeric types in target format.

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<&str> for NumericLiteral

Parse numeric literals from strings.

Attempts to parse as integer first, then float, then decimal.

type Error = String

The type returned in the event of a conversion error.

fn try_from(value: &str) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for NumericLiteral

Eq implementation requires all values to be comparable.

Note: This implementation is consistent with Hash because both use the exact variant type + value, not normalized decimal values.