From a5fa8322e915e405d5f3120f7ac6d1caf6a96697 Mon Sep 17 00:00:00 2001
From: Stephen Chung <Stephen.Chung@intexact.com>
Date: Mon, 20 Jul 2020 20:23:35 +0800
Subject: [PATCH] Avoid pulling in std for no-std.

---
 Cargo.toml                 | 1 +
 src/packages/arithmetic.rs | 3 +++
 src/packages/math_basic.rs | 3 +++
 src/parser.rs              | 1 +
 4 files changed, 8 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index 46c208c3..bf4e0dc2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -46,6 +46,7 @@ codegen-units = 1
 
 [dependencies.libm]
 version = "0.2.1"
+default_features = false
 optional = true
 
 [dependencies.core-error]
diff --git a/src/packages/arithmetic.rs b/src/packages/arithmetic.rs
index 7a548ff0..8aeb1590 100644
--- a/src/packages/arithmetic.rs
+++ b/src/packages/arithmetic.rs
@@ -7,6 +7,9 @@ use crate::token::Position;
 #[cfg(not(feature = "no_float"))]
 use crate::parser::FLOAT;
 
+#[cfg(not(feature = "no_float"))]
+use num_traits::*;
+
 use num_traits::{
     identities::Zero, CheckedAdd, CheckedDiv, CheckedMul, CheckedNeg, CheckedRem, CheckedShl,
     CheckedShr, CheckedSub,
diff --git a/src/packages/math_basic.rs b/src/packages/math_basic.rs
index e7ce43b7..ca0bc374 100644
--- a/src/packages/math_basic.rs
+++ b/src/packages/math_basic.rs
@@ -6,6 +6,9 @@ use crate::token::Position;
 #[cfg(not(feature = "no_float"))]
 use crate::parser::FLOAT;
 
+#[cfg(not(feature = "no_float"))]
+use num_traits::*;
+
 use crate::stdlib::{boxed::Box, format, i32, i64};
 
 #[cfg(feature = "only_i32")]
diff --git a/src/parser.rs b/src/parser.rs
index 610bc6e2..ce0eb686 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -608,6 +608,7 @@ impl Hash for CustomExpr {
 #[derive(Debug, PartialEq, PartialOrd, Clone)]
 pub struct FloatWrapper(pub FLOAT, pub Position);
 
+#[cfg(not(feature = "no_float"))]
 impl Hash for FloatWrapper {
     fn hash<H: Hasher>(&self, state: &mut H) {
         state.write(&self.0.to_le_bytes());