From 69247ad12ee865892399e839d2be225260d24f2d Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Fri, 17 Jan 2020 15:01:09 -0800
Subject: [PATCH] Assume const fn support

---
 Cargo.toml |  4 ----
 build.rs   | 12 ------------
 src/lib.rs |  9 ---------
 3 files changed, 25 deletions(-)
 delete mode 100644 build.rs

diff --git a/Cargo.toml b/Cargo.toml
index 2a583f9..21c7cd8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,6 @@ name = "num-complex"
 repository = "https://github.com/rust-num/num-complex"
 version = "0.3.0-pre"
 readme = "README.md"
-build = "build.rs"
 exclude = ["/ci/*", "/.travis.yml", "/bors.toml"]
 publish = false
 
@@ -37,6 +36,3 @@ default-features = false
 [features]
 default = ["std"]
 std = ["num-traits/std"]
-
-[build-dependencies]
-autocfg = "1"
diff --git a/build.rs b/build.rs
deleted file mode 100644
index 60d24cb..0000000
--- a/build.rs
+++ /dev/null
@@ -1,12 +0,0 @@
-extern crate autocfg;
-
-fn main() {
-    let ac = autocfg::new();
-
-    // autocfg doesn't have a direct way to probe for `const fn` yet.
-    if ac.probe_rustc_version(1, 31) {
-        autocfg::emit("has_const_fn");
-    }
-
-    autocfg::rerun_path("build.rs");
-}
diff --git a/src/lib.rs b/src/lib.rs
index 1b8f4ce..5f69183 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -93,19 +93,11 @@ pub type Complex32 = Complex<f32>;
 pub type Complex64 = Complex<f64>;
 
 impl<T> Complex<T> {
-    #[cfg(has_const_fn)]
     /// Create a new Complex
     #[inline]
     pub const fn new(re: T, im: T) -> Self {
         Complex { re: re, im: im }
     }
-
-    #[cfg(not(has_const_fn))]
-    /// Create a new Complex
-    #[inline]
-    pub fn new(re: T, im: T) -> Self {
-        Complex { re: re, im: im }
-    }
 }
 
 impl<T: Clone + Num> Complex<T> {
@@ -2647,7 +2639,6 @@ mod test {
         assert!(c.is_one());
     }
 
-    #[cfg(has_const_fn)]
     #[test]
     fn test_const() {
         const R: f64 = 12.3;