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DecimalLiteral

eqiora::language

Struct DecimalLiteral 

pub struct DecimalLiteral { /* private fields */ }
Description

An exact signed decimal coefficient times a power of ten.

Inputs use the decimal token grammar, optionally signed, and at most 256 bytes. Exponents and their normalization must fit i64; no floating conversion occurs.

Implementations§

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impl DecimalLiteral

Signature links:§DecimalLiteral

pub fn parse(text: &str) -> Result<DecimalLiteral, AstConstructionError>

Signature links:parsestrResultDecimalLiteralAstConstructionError

Check and normalize one exact decimal spelling.

§Errors

Rejects malformed decimal syntax, tokens over 256 bytes, and exponent overflow.

pub fn from_f64(value: f64) -> Result<DecimalLiteral, AstConstructionError>

Signature links:from_f64f64ResultDecimalLiteralAstConstructionError

Project a finite native binary64 value through its shortest scientific decimal.

§Errors

Rejects non-finite input. Representable subnormals are retained.

pub fn to_f64(&self) -> Result<f64, AstConstructionError>

Signature links:to_f64Resultf64AstConstructionError

Project this exact decimal into the real scalar domain once.

§Errors

Rejects non-finite overflow and nonzero underflow to binary64 zero.

pub fn to_i64(&self) -> Result<i64, AstConstructionError>

Signature links:to_i64Resulti64AstConstructionError

Read an integral decimal exactly within the signed 64-bit domain.

§Errors

Rejects fractional values and signed integer overflow without rounding.

pub fn coefficient(&self) -> &str

Signature links:coefficientstr

Unsigned digits, with no leading or trailing zeros except the unique zero 0.

pub const fn exponent10(&self) -> i64

Signature links:exponent10i64

Exact decimal power multiplying the coefficient.

pub fn is_zero(&self) -> bool

Signature links:is_zerobool

Whether the exact value is zero, independently of binary64 range.

pub const fn is_negative(&self) -> bool

Signature links:is_negativebool

Whether the exact value is negative; canonical zero has no negative sign.

pub fn canonical_text(&self) -> String

Signature links:canonical_textString

Canonical exact text, without expansion of enormous decimal exponents.

Trait Implementations§

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impl Clone for DecimalLiteral

Signature links:§CloneDecimalLiteral
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fn clone(&self) -> DecimalLiteral

Signature links:§cloneDecimalLiteral
Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Signature links:unstableSource§clone_from
Performs copy-assignment from source. Read more
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impl Debug for DecimalLiteral

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

Signature links:§fmtFormatterResult()Error
Formats the value using the given formatter. Read more
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impl Hash for DecimalLiteral

Signature links:§HashDecimalLiteral
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fn hash<__H>(&self, state: &mut __H)
where __H: Hasher,

Signature links:§hash&mut __HHasher
Feeds this value into the given Hasher. Read more
1.3.0 · Source§

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

Signature links:Source§hash_slice&mut HHasherSized
Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for DecimalLiteral

Signature links:§PartialEqDecimalLiteral
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fn eq(&self, other: &DecimalLiteral) -> bool

Signature links:§eqDecimalLiteralbool
Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

Signature links:unstableSource§ne&Rhsbool
Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for DecimalLiteral

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impl StructuralPartialEq for DecimalLiteral

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The error type produced by a failed conversion.
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Convert the given value into an approximately equivalent representation.
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