Update uses of @fieldParentPtr to use RLS

compile_errors/fieldParentPtr-bad_field_name.zig

@@ -2,12 +2,12 @@ const Foo = extern struct {
     derp: i32,
 };
 export fn foo(a: *i32) *Foo {
-    return @fieldParentPtr(*Foo, "a", a);
+    return @fieldParentPtr("a", a);
 }
 
 // error
 // backend=stage2
 // target=native
 //
-// :5:34: error: no field named 'a' in struct 'tmp.Foo'
+// :5:28: error: no field named 'a' in struct 'tmp.Foo'
 // :1:20: note: struct declared here

compile_errors/fieldParentPtr-comptime_field_ptr_not_based_on_struct.zig

@@ -9,7 +9,7 @@ const foo = Foo{
 
 comptime {
     const field_ptr: *i32 = @ptrFromInt(0x1234);
-    const another_foo_ptr = @fieldParentPtr(*const Foo, "b", field_ptr);
+    const another_foo_ptr: *const Foo = @fieldParentPtr("b", field_ptr);
     _ = another_foo_ptr;
 }
 

compile_errors/fieldParentPtr-comptime_wrong_field_index.zig

@@ -8,13 +8,13 @@ const foo = Foo{
 };
 
 comptime {
-    const another_foo_ptr = @fieldParentPtr(*const Foo, "b", &foo.a);
+    const another_foo_ptr: *const Foo = @fieldParentPtr("b", &foo.a);
     _ = another_foo_ptr;
 }
 
 // error
 // backend=stage2
 // target=native
 //
-// :11:29: error: field 'b' has index '1' but pointer value is index '0' of struct 'tmp.Foo'
+// :11:41: error: field 'b' has index '1' but pointer value is index '0' of struct 'tmp.Foo'
 // :1:13: note: struct declared here

compile_errors/fieldParentPtr-field_pointer_is_not_pointer.zig

@@ -1,12 +1,12 @@
 const Foo = extern struct {
     a: i32,
 };
-export fn foo(a: i32) *Foo {
-    return @fieldParentPtr(*const Foo, "a", a);
+export fn foo(a: i32) *const Foo {
+    return @fieldParentPtr("a", a);
 }
 
 // error
 // backend=stage2
 // target=native
 //
-// :5:45: error: expected pointer type, found 'i32'
+// :5:33: error: expected pointer type, found 'i32'

compile_errors/fieldParentPtr-non_pointer.zig

@@ -1,10 +1,10 @@
 const Foo = i32;
-export fn foo(a: *i32) *Foo {
-    return @fieldParentPtr(Foo, "a", a);
+export fn foo(a: *i32) Foo {
+    return @fieldParentPtr("a", a);
 }
 
 // error
 // backend=llvm
 // target=native
 //
-// :3:28: error: expected pointer type, found 'i32'
+// :3:12: error: expected pointer type, found 'i32'

compile_errors/fieldParentPtr_on_comptime_field.zig

@@ -5,12 +5,12 @@ pub export fn entry1() void {
     @offsetOf(T, "a");
 }
 pub export fn entry2() void {
-    @fieldParentPtr(*T, "a", undefined);
+    @as(*T, @fieldParentPtr("a", undefined));
 }
 
 // error
 // backend=stage2
 // target=native
 //
 // :5:5: error: no offset available for comptime field
-// :8:25: error: cannot get @fieldParentPtr of a comptime field
+// :8:29: error: cannot get @fieldParentPtr of a comptime field