815 lines
25 KiB
Rust
815 lines
25 KiB
Rust
use crate::de::ParserNumber;
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use crate::error::Error;
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#[cfg(feature = "arbitrary_precision")]
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use crate::error::ErrorCode;
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#[cfg(feature = "arbitrary_precision")]
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use alloc::borrow::ToOwned;
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#[cfg(feature = "arbitrary_precision")]
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use alloc::string::{String, ToString};
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use core::fmt::{self, Debug, Display};
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#[cfg(not(feature = "arbitrary_precision"))]
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use core::hash::{Hash, Hasher};
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use serde::de::{self, Unexpected, Visitor};
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#[cfg(feature = "arbitrary_precision")]
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use serde::de::{IntoDeserializer, MapAccess};
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use serde::{forward_to_deserialize_any, Deserialize, Deserializer, Serialize, Serializer};
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#[cfg(feature = "arbitrary_precision")]
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pub(crate) const TOKEN: &str = "$serde_json::private::Number";
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/// Represents a JSON number, whether integer or floating point.
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#[derive(Clone, PartialEq, Eq, Hash)]
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pub struct Number {
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n: N,
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}
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#[cfg(not(feature = "arbitrary_precision"))]
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#[derive(Copy, Clone)]
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enum N {
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PosInt(u64),
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/// Always less than zero.
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NegInt(i64),
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/// Always finite.
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Float(f64),
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}
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#[cfg(not(feature = "arbitrary_precision"))]
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impl PartialEq for N {
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fn eq(&self, other: &Self) -> bool {
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match (self, other) {
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(N::PosInt(a), N::PosInt(b)) => a == b,
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(N::NegInt(a), N::NegInt(b)) => a == b,
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(N::Float(a), N::Float(b)) => a == b,
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_ => false,
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}
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}
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}
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// Implementing Eq is fine since any float values are always finite.
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#[cfg(not(feature = "arbitrary_precision"))]
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impl Eq for N {}
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#[cfg(not(feature = "arbitrary_precision"))]
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impl Hash for N {
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fn hash<H: Hasher>(&self, h: &mut H) {
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match *self {
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N::PosInt(i) => i.hash(h),
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N::NegInt(i) => i.hash(h),
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N::Float(f) => {
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if f == 0.0f64 {
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// There are 2 zero representations, +0 and -0, which
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// compare equal but have different bits. We use the +0 hash
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// for both so that hash(+0) == hash(-0).
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0.0f64.to_bits().hash(h);
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} else {
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f.to_bits().hash(h);
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}
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}
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}
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}
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}
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#[cfg(feature = "arbitrary_precision")]
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type N = String;
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impl Number {
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/// Returns true if the `Number` is an integer between `i64::MIN` and
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/// `i64::MAX`.
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///
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/// For any Number on which `is_i64` returns true, `as_i64` is guaranteed to
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/// return the integer value.
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pub fn is_i64(&self) -> bool {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(v) => v <= i64::MAX as u64,
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N::NegInt(_) => true,
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N::Float(_) => false,
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}
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#[cfg(feature = "arbitrary_precision")]
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self.as_i64().is_some()
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}
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/// Returns true if the `Number` is an integer between zero and `u64::MAX`.
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///
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/// For any Number on which `is_u64` returns true, `as_u64` is guaranteed to
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/// return the integer value.
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pub fn is_u64(&self) -> bool {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(_) => true,
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N::NegInt(_) | N::Float(_) => false,
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}
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#[cfg(feature = "arbitrary_precision")]
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self.as_u64().is_some()
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}
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/// Returns true if the `Number` can be represented by f64.
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///
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/// For any Number on which `is_f64` returns true, `as_f64` is guaranteed to
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/// return the floating point value.
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///
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/// Currently this function returns true if and only if both `is_i64` and
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/// `is_u64` return false but this is not a guarantee in the future.
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pub fn is_f64(&self) -> bool {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::Float(_) => true,
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N::PosInt(_) | N::NegInt(_) => false,
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}
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#[cfg(feature = "arbitrary_precision")]
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{
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for c in self.n.chars() {
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if c == '.' || c == 'e' || c == 'E' {
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return self.n.parse::<f64>().is_ok_and(f64::is_finite);
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}
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}
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false
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}
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}
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/// If the `Number` is an integer, represent it as i64 if possible. Returns
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/// None otherwise.
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pub fn as_i64(&self) -> Option<i64> {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(n) => {
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if n <= i64::MAX as u64 {
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Some(n as i64)
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} else {
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None
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}
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}
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N::NegInt(n) => Some(n),
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N::Float(_) => None,
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}
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#[cfg(feature = "arbitrary_precision")]
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self.n.parse().ok()
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}
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/// If the `Number` is an integer, represent it as u64 if possible. Returns
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/// None otherwise.
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pub fn as_u64(&self) -> Option<u64> {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(n) => Some(n),
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N::NegInt(_) | N::Float(_) => None,
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}
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#[cfg(feature = "arbitrary_precision")]
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self.n.parse().ok()
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}
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/// Represents the number as f64 if possible. Returns None otherwise.
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pub fn as_f64(&self) -> Option<f64> {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(n) => Some(n as f64),
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N::NegInt(n) => Some(n as f64),
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N::Float(n) => Some(n),
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}
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#[cfg(feature = "arbitrary_precision")]
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self.n.parse::<f64>().ok().filter(|float| float.is_finite())
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}
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/// Converts a finite `f64` to a `Number`. Infinite or NaN values are not JSON
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/// numbers.
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///
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/// ```
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/// # use serde_json::Number;
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/// #
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/// assert!(Number::from_f64(256.0).is_some());
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///
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/// assert!(Number::from_f64(f64::NAN).is_none());
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/// ```
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pub fn from_f64(f: f64) -> Option<Number> {
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if f.is_finite() {
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let n = {
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#[cfg(not(feature = "arbitrary_precision"))]
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{
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N::Float(f)
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}
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#[cfg(feature = "arbitrary_precision")]
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{
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zmij::Buffer::new().format_finite(f).to_owned()
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}
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};
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Some(Number { n })
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} else {
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None
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}
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}
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/// If the `Number` is an integer, represent it as i128 if possible. Returns
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/// None otherwise.
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pub fn as_i128(&self) -> Option<i128> {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(n) => Some(n as i128),
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N::NegInt(n) => Some(n as i128),
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N::Float(_) => None,
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}
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#[cfg(feature = "arbitrary_precision")]
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self.n.parse().ok()
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}
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/// If the `Number` is an integer, represent it as u128 if possible. Returns
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/// None otherwise.
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pub fn as_u128(&self) -> Option<u128> {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(n) => Some(n as u128),
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N::NegInt(_) | N::Float(_) => None,
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}
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#[cfg(feature = "arbitrary_precision")]
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self.n.parse().ok()
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}
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/// Converts an `i128` to a `Number`. Numbers smaller than i64::MIN or
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/// larger than u64::MAX can only be represented in `Number` if serde_json's
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/// "arbitrary_precision" feature is enabled.
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///
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/// ```
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/// # use serde_json::Number;
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/// #
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/// assert!(Number::from_i128(256).is_some());
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/// ```
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pub fn from_i128(i: i128) -> Option<Number> {
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let n = {
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#[cfg(not(feature = "arbitrary_precision"))]
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{
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if let Ok(u) = u64::try_from(i) {
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N::PosInt(u)
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} else if let Ok(i) = i64::try_from(i) {
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N::NegInt(i)
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} else {
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return None;
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}
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}
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#[cfg(feature = "arbitrary_precision")]
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{
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i.to_string()
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}
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};
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Some(Number { n })
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}
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/// Converts a `u128` to a `Number`. Numbers greater than u64::MAX can only
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/// be represented in `Number` if serde_json's "arbitrary_precision" feature
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/// is enabled.
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///
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/// ```
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/// # use serde_json::Number;
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/// #
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/// assert!(Number::from_u128(256).is_some());
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/// ```
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pub fn from_u128(i: u128) -> Option<Number> {
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let n = {
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#[cfg(not(feature = "arbitrary_precision"))]
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{
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if let Ok(u) = u64::try_from(i) {
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N::PosInt(u)
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} else {
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return None;
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}
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}
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#[cfg(feature = "arbitrary_precision")]
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{
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i.to_string()
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}
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};
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Some(Number { n })
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}
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/// Returns the JSON representation that this Number was parsed from.
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///
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/// When parsing with serde_json's `arbitrary_precision` feature enabled,
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/// positive exponents are normalized to include an explicit `+` sign so
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/// that `1e140` becomes `1e+140`.
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///
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/// For numbers constructed not via parsing, such as by `From<i32>`, returns
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/// the JSON representation that serde\_json would serialize for this
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/// number.
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///
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/// ```
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/// # use serde_json::Number;
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/// for value in [
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/// "7",
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/// "12.34",
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/// "34e-56789",
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/// "0.0123456789000000012345678900000001234567890000123456789",
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/// "343412345678910111213141516171819202122232425262728293034",
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/// "-343412345678910111213141516171819202122232425262728293031",
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/// ] {
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/// let number: Number = serde_json::from_str(value).unwrap();
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/// assert_eq!(number.as_str(), value);
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/// }
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/// ```
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#[cfg(feature = "arbitrary_precision")]
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#[cfg_attr(docsrs, doc(cfg(feature = "arbitrary_precision")))]
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pub fn as_str(&self) -> &str {
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&self.n
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}
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pub(crate) fn as_f32(&self) -> Option<f32> {
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#[cfg(not(feature = "arbitrary_precision"))]
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match self.n {
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N::PosInt(n) => Some(n as f32),
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N::NegInt(n) => Some(n as f32),
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N::Float(n) => Some(n as f32),
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}
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#[cfg(feature = "arbitrary_precision")]
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self.n.parse::<f32>().ok().filter(|float| float.is_finite())
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}
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pub(crate) fn from_f32(f: f32) -> Option<Number> {
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if f.is_finite() {
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let n = {
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#[cfg(not(feature = "arbitrary_precision"))]
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{
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N::Float(f as f64)
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}
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#[cfg(feature = "arbitrary_precision")]
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{
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zmij::Buffer::new().format_finite(f).to_owned()
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}
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};
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Some(Number { n })
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} else {
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None
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}
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}
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#[cfg(feature = "arbitrary_precision")]
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/// Not public API. Only tests use this.
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#[doc(hidden)]
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#[inline]
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pub fn from_string_unchecked(n: String) -> Self {
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Number { n }
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}
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}
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impl Display for Number {
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#[cfg(not(feature = "arbitrary_precision"))]
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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match self.n {
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N::PosInt(u) => formatter.write_str(itoa::Buffer::new().format(u)),
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N::NegInt(i) => formatter.write_str(itoa::Buffer::new().format(i)),
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N::Float(f) => formatter.write_str(zmij::Buffer::new().format_finite(f)),
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}
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}
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#[cfg(feature = "arbitrary_precision")]
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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Display::fmt(&self.n, formatter)
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}
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}
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impl Debug for Number {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "Number({})", self)
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}
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}
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impl Serialize for Number {
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#[cfg(not(feature = "arbitrary_precision"))]
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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match self.n {
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N::PosInt(u) => serializer.serialize_u64(u),
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N::NegInt(i) => serializer.serialize_i64(i),
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N::Float(f) => serializer.serialize_f64(f),
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}
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}
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#[cfg(feature = "arbitrary_precision")]
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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use serde::ser::SerializeStruct;
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let mut s = tri!(serializer.serialize_struct(TOKEN, 1));
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tri!(s.serialize_field(TOKEN, &self.n));
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s.end()
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}
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}
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impl<'de> Deserialize<'de> for Number {
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#[inline]
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fn deserialize<D>(deserializer: D) -> Result<Number, D::Error>
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where
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D: Deserializer<'de>,
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{
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struct NumberVisitor;
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impl<'de> Visitor<'de> for NumberVisitor {
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type Value = Number;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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formatter.write_str("a JSON number")
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}
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fn visit_i64<E>(self, value: i64) -> Result<Number, E> {
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Ok(value.into())
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}
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fn visit_i128<E>(self, value: i128) -> Result<Number, E>
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where
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E: de::Error,
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{
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Number::from_i128(value)
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.ok_or_else(|| de::Error::custom("JSON number out of range"))
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}
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fn visit_u64<E>(self, value: u64) -> Result<Number, E> {
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Ok(value.into())
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}
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fn visit_u128<E>(self, value: u128) -> Result<Number, E>
|
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where
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E: de::Error,
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{
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Number::from_u128(value)
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.ok_or_else(|| de::Error::custom("JSON number out of range"))
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}
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|
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fn visit_f64<E>(self, value: f64) -> Result<Number, E>
|
|
where
|
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E: de::Error,
|
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{
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Number::from_f64(value).ok_or_else(|| de::Error::custom("not a JSON number"))
|
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}
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|
|
|
#[cfg(feature = "arbitrary_precision")]
|
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fn visit_map<V>(self, mut visitor: V) -> Result<Number, V::Error>
|
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where
|
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V: de::MapAccess<'de>,
|
|
{
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let value = tri!(visitor.next_key::<NumberKey>());
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if value.is_none() {
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return Err(de::Error::invalid_type(Unexpected::Map, &self));
|
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}
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let v: NumberFromString = tri!(visitor.next_value());
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Ok(v.value)
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}
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}
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|
|
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deserializer.deserialize_any(NumberVisitor)
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}
|
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}
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|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
struct NumberKey;
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|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
impl<'de> de::Deserialize<'de> for NumberKey {
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|
fn deserialize<D>(deserializer: D) -> Result<NumberKey, D::Error>
|
|
where
|
|
D: de::Deserializer<'de>,
|
|
{
|
|
struct FieldVisitor;
|
|
|
|
impl<'de> de::Visitor<'de> for FieldVisitor {
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|
type Value = ();
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|
|
|
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
|
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formatter.write_str("a valid number field")
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|
}
|
|
|
|
fn visit_str<E>(self, s: &str) -> Result<(), E>
|
|
where
|
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E: de::Error,
|
|
{
|
|
if s == TOKEN {
|
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Ok(())
|
|
} else {
|
|
Err(de::Error::custom("expected field with custom name"))
|
|
}
|
|
}
|
|
}
|
|
|
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tri!(deserializer.deserialize_identifier(FieldVisitor));
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Ok(NumberKey)
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
pub struct NumberFromString {
|
|
pub value: Number,
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
impl<'de> de::Deserialize<'de> for NumberFromString {
|
|
fn deserialize<D>(deserializer: D) -> Result<NumberFromString, D::Error>
|
|
where
|
|
D: de::Deserializer<'de>,
|
|
{
|
|
struct Visitor;
|
|
|
|
impl<'de> de::Visitor<'de> for Visitor {
|
|
type Value = NumberFromString;
|
|
|
|
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
|
|
formatter.write_str("string containing a number")
|
|
}
|
|
|
|
fn visit_str<E>(self, s: &str) -> Result<NumberFromString, E>
|
|
where
|
|
E: de::Error,
|
|
{
|
|
let n = tri!(s.parse().map_err(de::Error::custom));
|
|
Ok(NumberFromString { value: n })
|
|
}
|
|
}
|
|
|
|
deserializer.deserialize_str(Visitor)
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
fn invalid_number() -> Error {
|
|
Error::syntax(ErrorCode::InvalidNumber, 0, 0)
|
|
}
|
|
|
|
macro_rules! deserialize_any {
|
|
(@expand [$($num_string:tt)*]) => {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
|
|
where
|
|
V: Visitor<'de>,
|
|
{
|
|
match self.n {
|
|
N::PosInt(u) => visitor.visit_u64(u),
|
|
N::NegInt(i) => visitor.visit_i64(i),
|
|
N::Float(f) => visitor.visit_f64(f),
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
|
|
where V: Visitor<'de>
|
|
{
|
|
if let Some(u) = self.as_u64() {
|
|
return visitor.visit_u64(u);
|
|
} else if let Some(i) = self.as_i64() {
|
|
return visitor.visit_i64(i);
|
|
} else if let Some(u) = self.as_u128() {
|
|
return visitor.visit_u128(u);
|
|
} else if let Some(i) = self.as_i128() {
|
|
return visitor.visit_i128(i);
|
|
} else if let Some(f) = self.as_f64() {
|
|
if zmij::Buffer::new().format_finite(f) == self.n || f.to_string() == self.n {
|
|
return visitor.visit_f64(f);
|
|
}
|
|
}
|
|
|
|
visitor.visit_map(NumberDeserializer {
|
|
number: Some(self.$($num_string)*),
|
|
})
|
|
}
|
|
};
|
|
|
|
(owned) => {
|
|
deserialize_any!(@expand [n]);
|
|
};
|
|
|
|
(ref) => {
|
|
deserialize_any!(@expand [n.clone()]);
|
|
};
|
|
}
|
|
|
|
macro_rules! deserialize_number {
|
|
($deserialize:ident => $visit:ident) => {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
fn $deserialize<V>(self, visitor: V) -> Result<V::Value, Error>
|
|
where
|
|
V: Visitor<'de>,
|
|
{
|
|
self.deserialize_any(visitor)
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
fn $deserialize<V>(self, visitor: V) -> Result<V::Value, Error>
|
|
where
|
|
V: de::Visitor<'de>,
|
|
{
|
|
visitor.$visit(tri!(self.n.parse().map_err(|_| invalid_number())))
|
|
}
|
|
};
|
|
}
|
|
|
|
impl<'de> Deserializer<'de> for Number {
|
|
type Error = Error;
|
|
|
|
deserialize_any!(owned);
|
|
|
|
deserialize_number!(deserialize_i8 => visit_i8);
|
|
deserialize_number!(deserialize_i16 => visit_i16);
|
|
deserialize_number!(deserialize_i32 => visit_i32);
|
|
deserialize_number!(deserialize_i64 => visit_i64);
|
|
deserialize_number!(deserialize_i128 => visit_i128);
|
|
deserialize_number!(deserialize_u8 => visit_u8);
|
|
deserialize_number!(deserialize_u16 => visit_u16);
|
|
deserialize_number!(deserialize_u32 => visit_u32);
|
|
deserialize_number!(deserialize_u64 => visit_u64);
|
|
deserialize_number!(deserialize_u128 => visit_u128);
|
|
deserialize_number!(deserialize_f32 => visit_f32);
|
|
deserialize_number!(deserialize_f64 => visit_f64);
|
|
|
|
forward_to_deserialize_any! {
|
|
bool char str string bytes byte_buf option unit unit_struct
|
|
newtype_struct seq tuple tuple_struct map struct enum identifier
|
|
ignored_any
|
|
}
|
|
}
|
|
|
|
impl<'de> Deserializer<'de> for &Number {
|
|
type Error = Error;
|
|
|
|
deserialize_any!(ref);
|
|
|
|
deserialize_number!(deserialize_i8 => visit_i8);
|
|
deserialize_number!(deserialize_i16 => visit_i16);
|
|
deserialize_number!(deserialize_i32 => visit_i32);
|
|
deserialize_number!(deserialize_i64 => visit_i64);
|
|
deserialize_number!(deserialize_i128 => visit_i128);
|
|
deserialize_number!(deserialize_u8 => visit_u8);
|
|
deserialize_number!(deserialize_u16 => visit_u16);
|
|
deserialize_number!(deserialize_u32 => visit_u32);
|
|
deserialize_number!(deserialize_u64 => visit_u64);
|
|
deserialize_number!(deserialize_u128 => visit_u128);
|
|
deserialize_number!(deserialize_f32 => visit_f32);
|
|
deserialize_number!(deserialize_f64 => visit_f64);
|
|
|
|
forward_to_deserialize_any! {
|
|
bool char str string bytes byte_buf option unit unit_struct
|
|
newtype_struct seq tuple tuple_struct map struct enum identifier
|
|
ignored_any
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
pub(crate) struct NumberDeserializer {
|
|
pub number: Option<String>,
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
impl<'de> MapAccess<'de> for NumberDeserializer {
|
|
type Error = Error;
|
|
|
|
fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
|
|
where
|
|
K: de::DeserializeSeed<'de>,
|
|
{
|
|
if self.number.is_none() {
|
|
return Ok(None);
|
|
}
|
|
seed.deserialize(NumberFieldDeserializer).map(Some)
|
|
}
|
|
|
|
fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
|
|
where
|
|
V: de::DeserializeSeed<'de>,
|
|
{
|
|
seed.deserialize(self.number.take().unwrap().into_deserializer())
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
struct NumberFieldDeserializer;
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
impl<'de> Deserializer<'de> for NumberFieldDeserializer {
|
|
type Error = Error;
|
|
|
|
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
|
|
where
|
|
V: de::Visitor<'de>,
|
|
{
|
|
visitor.visit_borrowed_str(TOKEN)
|
|
}
|
|
|
|
forward_to_deserialize_any! {
|
|
bool u8 u16 u32 u64 u128 i8 i16 i32 i64 i128 f32 f64 char str string seq
|
|
bytes byte_buf map struct option unit newtype_struct ignored_any
|
|
unit_struct tuple_struct tuple enum identifier
|
|
}
|
|
}
|
|
|
|
impl From<ParserNumber> for Number {
|
|
fn from(value: ParserNumber) -> Self {
|
|
let n = match value {
|
|
ParserNumber::F64(f) => {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
{
|
|
N::Float(f)
|
|
}
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
{
|
|
zmij::Buffer::new().format_finite(f).to_owned()
|
|
}
|
|
}
|
|
ParserNumber::U64(u) => {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
{
|
|
N::PosInt(u)
|
|
}
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
{
|
|
itoa::Buffer::new().format(u).to_owned()
|
|
}
|
|
}
|
|
ParserNumber::I64(i) => {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
{
|
|
N::NegInt(i)
|
|
}
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
{
|
|
itoa::Buffer::new().format(i).to_owned()
|
|
}
|
|
}
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
ParserNumber::String(s) => s,
|
|
};
|
|
Number { n }
|
|
}
|
|
}
|
|
|
|
macro_rules! impl_from_unsigned {
|
|
(
|
|
$($ty:ty),*
|
|
) => {
|
|
$(
|
|
impl From<$ty> for Number {
|
|
fn from(u: $ty) -> Self {
|
|
let n = {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
{ N::PosInt(u as u64) }
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
{
|
|
itoa::Buffer::new().format(u).to_owned()
|
|
}
|
|
};
|
|
Number { n }
|
|
}
|
|
}
|
|
)*
|
|
};
|
|
}
|
|
|
|
macro_rules! impl_from_signed {
|
|
(
|
|
$($ty:ty),*
|
|
) => {
|
|
$(
|
|
impl From<$ty> for Number {
|
|
fn from(i: $ty) -> Self {
|
|
let n = {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
{
|
|
if i < 0 {
|
|
N::NegInt(i as i64)
|
|
} else {
|
|
N::PosInt(i as u64)
|
|
}
|
|
}
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
{
|
|
itoa::Buffer::new().format(i).to_owned()
|
|
}
|
|
};
|
|
Number { n }
|
|
}
|
|
}
|
|
)*
|
|
};
|
|
}
|
|
|
|
impl_from_unsigned!(u8, u16, u32, u64, usize);
|
|
impl_from_signed!(i8, i16, i32, i64, isize);
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
impl_from_unsigned!(u128);
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
impl_from_signed!(i128);
|
|
|
|
impl Number {
|
|
#[cfg(not(feature = "arbitrary_precision"))]
|
|
#[cold]
|
|
pub(crate) fn unexpected(&self) -> Unexpected {
|
|
match self.n {
|
|
N::PosInt(u) => Unexpected::Unsigned(u),
|
|
N::NegInt(i) => Unexpected::Signed(i),
|
|
N::Float(f) => Unexpected::Float(f),
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "arbitrary_precision")]
|
|
#[cold]
|
|
pub(crate) fn unexpected(&self) -> Unexpected {
|
|
Unexpected::Other("number")
|
|
}
|
|
}
|