Update to Rust 2021 (#513)

.github/workflows/main.yml

@@ -186,7 +186,7 @@ jobs:
 
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.54.0
+          toolchain: 1.56.0
           profile: minimal
           override: true
 

Cargo.toml

@@ -8,7 +8,7 @@ authors = ["Paul Mason <paul@form1.co.nz>"]
 categories = ["science","mathematics","data-structures"]
 description = "Decimal number implementation written in pure Rust suitable for financial and fixed-precision calculations."
 documentation = "https://docs.rs/rust_decimal/"
-edition = "2018"
+edition = "2021"
 exclude = [ "tests/generated/*" ]
 keywords = ["decimal","financial","fixed","precision","number"]
 license = "MIT"
@@ -63,7 +63,7 @@ serde-arbitrary-precision = ["serde-with-arbitrary-precision"]
 serde-bincode = ["serde-str"] # Backwards compatability
 serde-float = ["serde-with-float"]
 serde-str = ["serde-with-str"]
-serde-with-arbitrary-precision = ["serde", "serde_json/arbitrary_precision"]
+serde-with-arbitrary-precision = ["serde", "serde_json/arbitrary_precision", "serde_json/std"]
 serde-with-float = ["serde"]
 serde-with-str = ["serde"]
 std = []

README.md

@@ -234,8 +234,8 @@ Please refer to the [Build document](BUILD.md) for more information on building
 
 ## Minimum Rust Compiler Version
 
-The current _minimum_ compiler version is [`1.54.0`](https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1540-2021-07-29)
-which was released on `2021-07-29`.
+The current _minimum_ compiler version is [`1.56.0`](https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1560-2021-10-21)
+which was released on `2021-10-21`.
 
 This library maintains support for rust compiler versions that are 4 minor versions away from the current stable rust compiler version.
 For example, if the current stable compiler version is `1.50.0` then we will guarantee support up to and including `1.46.0`.

fuzz/Cargo.toml

@@ -18,7 +18,7 @@ serde_json = { default-features = false, features = ["alloc"], version = "1.0" }
 
 [package]
 authors = ["Automatically generated"]
-edition = "2018"
+edition = "2021"
 name = "rust-decimal-fuzz"
 publish = false
 version = "0.0.0"

macros/Cargo.toml

@@ -2,7 +2,7 @@
 name = "rust_decimal_macros"
 version = "1.23.1"
 authors = ["Paul Mason <paul@form1.co.nz>"]
-edition = "2018"
+edition = "2021"
 description = "Shorthand macros to assist creating Decimal types."
 documentation = "https://docs.rs/rust_decimal/"
 repository = "https://github.com/paupino/rust-decimal"

src/decimal.rs

@@ -1720,7 +1720,7 @@ macro_rules! impl_try_from_decimal {
             stringify!($TInto),
             "`.",
         )]
-        impl core::convert::TryFrom<Decimal> for $TInto {
+        impl TryFrom<Decimal> for $TInto {
             type Error = crate::Error;
 
             #[inline]
@@ -1756,7 +1756,7 @@ macro_rules! impl_try_from_primitive {
             stringify!($TFrom),
             "` into a `Decimal`.\n\nCan fail if the value is out of range for `Decimal`."
         )]
-        impl core::convert::TryFrom<$TFrom> for Decimal {
+        impl TryFrom<$TFrom> for Decimal {
             type Error = crate::Error;
 
             #[inline]

src/postgres.rs

@@ -3,7 +3,7 @@ use crate::{
     ops::array::{div_by_u32, is_all_zero, mul_by_u32},
     Decimal,
 };
-use core::{convert::TryInto, fmt};
+use core::fmt;
 use std::error;
 
 #[derive(Debug, Clone)]
@@ -149,7 +149,6 @@ mod diesel_postgres {
         serialize::{self, Output, ToSql},
         sql_types::Numeric,
     };
-    use core::convert::{TryFrom, TryInto};
     use std::io::Write;
 
     impl<'a> TryFrom<&'a PgNumeric> for Decimal {

tests/decimal_tests.rs

@@ -1,10 +1,6 @@
 mod macros;
 
-use core::{
-    cmp::Ordering::*,
-    convert::{TryFrom, TryInto},
-    str::FromStr,
-};
+use core::{cmp::Ordering::*, str::FromStr};
 use num_traits::{Inv, Signed, ToPrimitive};
 use rust_decimal::{Decimal, Error, RoundingStrategy};