From ffb1531e0e9810a746c3a3588394519ef1fdf221 Mon Sep 17 00:00:00 2001
From: Stephen Chung <schungx@live.com>
Date: Sun, 25 Jul 2021 11:50:31 +0800
Subject: [PATCH] New constants for Dynamic.

---
 CHANGELOG.md   |  1 +
 src/dynamic.rs | 62 +++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2819836..98e4ad65 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ Enhancements
 
 * `$symbol$` is supported in custom syntax to match any symbol.
 * `Dynamic::as_string` and `Dynamic::as_immutable_string` are deprecated and replaced by `into_string` and `into_immutable_string` respectively.
+* Added a number of constants to `Dynamic`.
 * `parse_float()`, `PI()` and `E()` now defer to `Decimal` under `no_float` if `decimal` is turned on.
 
 
diff --git a/src/dynamic.rs b/src/dynamic.rs
index 8d401697..b1126623 100644
--- a/src/dynamic.rs
+++ b/src/dynamic.rs
@@ -830,8 +830,14 @@ impl Dynamic {
     pub const ONE: Dynamic = Self(Union::Int(1, DEFAULT_TAG_VALUE, ReadWrite));
     /// A [`Dynamic`] containing the integer two.
     pub const TWO: Dynamic = Self(Union::Int(2, DEFAULT_TAG_VALUE, ReadWrite));
+    /// A [`Dynamic`] containing the integer three.
+    pub const THREE: Dynamic = Self(Union::Int(3, DEFAULT_TAG_VALUE, ReadWrite));
     /// A [`Dynamic`] containing the integer ten.
     pub const TEN: Dynamic = Self(Union::Int(10, DEFAULT_TAG_VALUE, ReadWrite));
+    /// A [`Dynamic`] containing the integer one hundred.
+    pub const HUNDRED: Dynamic = Self(Union::Int(100, DEFAULT_TAG_VALUE, ReadWrite));
+    /// A [`Dynamic`] containing the integer one thousand.
+    pub const THOUSAND: Dynamic = Self(Union::Int(1000, DEFAULT_TAG_VALUE, ReadWrite));
     /// A [`Dynamic`] containing the integer negative one.
     pub const NEGATIVE_ONE: Dynamic = Self(Union::Int(-1, DEFAULT_TAG_VALUE, ReadWrite));
     /// A [`Dynamic`] containing `0.0`.
@@ -870,7 +876,25 @@ impl Dynamic {
         DEFAULT_TAG_VALUE,
         ReadWrite,
     ));
-    /// A [`Dynamic`] containing the `-1.0`.
+    /// A [`Dynamic`] containing `100.0`.
+    ///
+    /// Not available under `no_float`.
+    #[cfg(not(feature = "no_float"))]
+    pub const FLOAT_HUNDRED: Dynamic = Self(Union::Float(
+        FloatWrapper::new_const(100.0),
+        DEFAULT_TAG_VALUE,
+        ReadWrite,
+    ));
+    /// A [`Dynamic`] containing `1000.0`.
+    ///
+    /// Not available under `no_float`.
+    #[cfg(not(feature = "no_float"))]
+    pub const FLOAT_THOUSAND: Dynamic = Self(Union::Float(
+        FloatWrapper::new_const(1000.0),
+        DEFAULT_TAG_VALUE,
+        ReadWrite,
+    ));
+    /// A [`Dynamic`] containing `-1.0`.
     ///
     /// Not available under `no_float`.
     #[cfg(not(feature = "no_float"))]
@@ -879,6 +903,42 @@ impl Dynamic {
         DEFAULT_TAG_VALUE,
         ReadWrite,
     ));
+    /// A [`Dynamic`] containing π.
+    ///
+    /// Not available under `no_float`.
+    #[cfg(not(feature = "no_float"))]
+    pub const FLOAT_PI: Dynamic = Self(Union::Float(
+        #[cfg(not(feature = "f32_float"))]
+        FloatWrapper::new_const(std::f64::consts::PI),
+        #[cfg(feature = "f32_float")]
+        FloatWrapper::new_const(std::f32::consts::PI),
+        DEFAULT_TAG_VALUE,
+        ReadWrite,
+    ));
+    /// A [`Dynamic`] containing π/2.
+    ///
+    /// Not available under `no_float`.
+    #[cfg(not(feature = "no_float"))]
+    pub const FLOAT_HALF_PI: Dynamic = Self(Union::Float(
+        #[cfg(not(feature = "f32_float"))]
+        FloatWrapper::new_const(std::f64::consts::PI / 2.0),
+        #[cfg(feature = "f32_float")]
+        FloatWrapper::new_const(std::f32::consts::PI / 2.0),
+        DEFAULT_TAG_VALUE,
+        ReadWrite,
+    ));
+    /// A [`Dynamic`] containing 2π.
+    ///
+    /// Not available under `no_float`.
+    #[cfg(not(feature = "no_float"))]
+    pub const FLOAT_TWO_PI: Dynamic = Self(Union::Float(
+        #[cfg(not(feature = "f32_float"))]
+        FloatWrapper::new_const(2.0 * std::f64::consts::PI),
+        #[cfg(feature = "f32_float")]
+        FloatWrapper::new_const(2.0 * std::f32::consts::PI),
+        DEFAULT_TAG_VALUE,
+        ReadWrite,
+    ));
 
     /// Get the [`AccessMode`] for this [`Dynamic`].
     #[must_use]