Assume const fn support

Author: cuviper

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"

build.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;