1 files changed, 68 insertions, 0 deletions
diff --git a/test/cmplx.go b/test/cmplx.go
new file mode 100644
index 0000000..d63c7eb
--- /dev/null
+++ b/test/cmplx.go
@@ -0,0 +1,68 @@
+// errorcheck
+
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Verify that incorrect invocations of the complex predeclared function are detected.
+// Does not compile.
+
+package main
+
+type (
+	Float32    float32
+	Float64    float64
+	Complex64  complex64
+	Complex128 complex128
+)
+
+var (
+	f32 float32
+	f64 float64
+	F32 Float32
+	F64 Float64
+
+	c64  complex64
+	c128 complex128
+	C64  Complex64
+	C128 Complex128
+)
+
+func F1() int {
+	return 1
+}
+
+func F3() (int, int, int) {
+	return 1, 2, 3
+}
+
+func main() {
+	// ok
+	c64 = complex(f32, f32)
+	c128 = complex(f64, f64)
+
+	_ = complex128(0)     // ok
+	_ = complex(f32, f64) // ERROR "complex"
+	_ = complex(f64, f32) // ERROR "complex"
+	_ = complex(f32, F32) // ERROR "complex"
+	_ = complex(F32, f32) // ERROR "complex"
+	_ = complex(f64, F64) // ERROR "complex"
+	_ = complex(F64, f64) // ERROR "complex"
+
+	_ = complex(F1()) // ERROR "not enough arguments"
+	_ = complex(F3()) // ERROR "too many arguments"
+
+	_ = complex() // ERROR "not enough arguments"
+
+	c128 = complex(f32, f32) // ERROR "cannot use"
+	c64 = complex(f64, f64)  // ERROR "cannot use"
+
+	c64 = complex(1.0, 2.0) // ok, constant is untyped
+	c128 = complex(1.0, 2.0)
+	C64 = complex(1.0, 2.0)
+	C128 = complex(1.0, 2.0)
+
+	C64 = complex(f32, f32)  // ERROR "cannot use"
+	C128 = complex(f64, f64) // ERROR "cannot use"
+
+}