Add tests for cast expressions.

Author: reitermarkus

tests/clang.rs

@@ -72,6 +72,21 @@ fn test_definition(
                 s.extend_from_slice(rest);
             }
             Some(Str(s))
+        } else if expected == b"Cast" {
+            str::from_utf8(value).ok().and_then(|s| {
+                let (ty, value) = s.rsplit_once("_Int_")?;
+
+                let ty = ty.split("_").filter_map(|t| {
+                    if t == "const" || t == "signed" {
+                        None
+                    } else {
+                      Some(t.as_bytes().to_vec())
+                    }
+                }).collect::<Vec<Vec<u8>>>();
+                let int = bytes_to_int(value.as_bytes())?;
+
+                Some(Cast(ty, Box::new(int)))
+            })
         } else if expected == b"Int" {
             bytes_to_int(value)
         } else if expected == b"Float" {

tests/input/int_signed.h

@@ -3,3 +3,23 @@
 #define Int_n9223372036854775808 -9223372036854775808
 
 #define Fn_Int_n9(_3) _3*-3
+
+#define Cast_short_Int_n6 (short) -6
+#define Cast_signed_short_Int_n6 (signed short) -6
+#define Cast_const_short_Int_n6 (const short) -6
+#define Cast_const_signed_short_Int_n6 (const signed short) -6
+
+#define Cast_int_Int_n6 (int) -6
+#define Cast_signed_int_Int_n6 (signed int) -6
+#define Cast_const_int_Int_n6 (const int) -6
+#define Cast_const_signed_int_Int_n6 (const signed int) -6
+
+#define Cast_long_Int_n6 (long) -6
+#define Cast_signed_long_Int_n6 (signed long) -6
+#define Cast_const_long_Int_n6 (const long) -6
+#define Cast_const_signed_long_Int_n6 (const signed long) -6
+
+#define Cast_long_long_Int_n6 (long long) -6
+#define Cast_signed_long_long_Int_n6 (signed long long) -6
+#define Cast_const_long_long_Int_n6 (const long long) -6
+#define Cast_const_signed_long_long_Int_n6 (const signed long long) -6

tests/input/int_unsigned.h

@@ -28,3 +28,15 @@
 
 #define Fn_Int_9(_3) _3*3
 #define Fn_Int_unused_arg_3(x_unused_0) 3
+
+#define Cast_unsigned_short_Int_6 (unsigned short) 6
+#define Cast_const_unsigned_short_Int_6 (const unsigned short) 6
+
+#define Cast_unsigned_int_Int_6 (unsigned int) 6
+#define Cast_const_unsigned_int_Int_6 (const unsigned int) 6
+
+#define Cast_unsigned_long_Int_6 (unsigned long) 6
+#define Cast_const_unsigned_long_Int_6 (const unsigned long) 6
+
+#define Cast_unsigned_long_long_Int_6 (unsigned long long) 6
+#define Cast_const_unsigned_long_long_Int_6 (const unsigned long long) 6