code review 20060044: [release-branch.go1.2] cmd/cgo: stop using compiler err...

misc/cgo/test/issue6612.go

+// Copyright 2013 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.
+
+// golang.org/issue/6612
+// Test new scheme for deciding whether C.name is an expression, type, constant.
+// Clang silences some warnings when the name is a #defined macro, so test those too
+// (even though we now use errors exclusively, not warnings).
+
+package cgotest
+
+/*
+void myfunc(void) {}
+int myvar = 5;
+const char *mytext = "abcdef";
+typedef int mytype;
+enum {
+        myenum = 1234,
+};
+
+#define myfunc_def myfunc
+#define myvar_def myvar
+#define mytext_def mytext
+#define mytype_def mytype
+#define myenum_def myenum
+#define myint_def 12345
+#define myfloat_def 1.5
+#define mystring_def "hello"
+*/
+import "C"
+
+import "testing"
+
+func testNaming(t *testing.T) {
+        C.myfunc()
+        C.myfunc_def()
+        if v := C.myvar; v != 5 {
+                t.Errorf("C.myvar = %d, want 5", v)
+        }
+        if v := C.myvar_def; v != 5 {
+                t.Errorf("C.myvar_def = %d, want 5", v)
+        }
+        if s := C.GoString(C.mytext); s != "abcdef" {
+                t.Errorf("C.mytext = %q, want %q", s, "abcdef")
+        }
+        if s := C.GoString(C.mytext_def); s != "abcdef" {
+                t.Errorf("C.mytext_def = %q, want %q", s, "abcdef")
+        }
+        if c := C.myenum; c != 1234 {
+                t.Errorf("C.myenum = %v, want 1234", c)
+        }
+        if c := C.myenum_def; c != 1234 {
+                t.Errorf("C.myenum_def = %v, want 1234", c)
+        }
+        {
+                const c = C.myenum
+                if c != 1234 {
+                        t.Errorf("C.myenum as const = %v, want 1234", c)
+                }
+        }
+        {
+                const c = C.myenum_def
+                if c != 1234 {
+                        t.Errorf("C.myenum as const = %v, want 1234", c)
+                }
+        }
+        if c := C.myint_def; c != 12345 {
+                t.Errorf("C.myint_def = %v, want 12345", c)
+        }
+        {
+                const c = C.myint_def
+                if c != 12345 {
+                        t.Errorf("C.myint as const = %v, want 12345", c)
+                }
+        }
+
+        // This would be nice, but it has never worked.
+        /*
+                if c := C.myfloat_def; c != 1.5 {
+                        t.Errorf("C.myint_def = %v, want 1.5", c)
+                }
+                {
+                        const c = C.myfloat_def
+                        if c != 1.5 {
+                        t.Errorf("C.myint as const = %v, want 1.5", c)
+                        }
+                }
+        */
+
+        if s := C.mystring_def; s != "hello" {
+                t.Errorf("C.mystring_def = %q, want %q", s, "hello")
+        }
+}