Ex 065: improve hints, fix type printing change. For #120 and #128

patches/patches/065_builtins2.patch

@@ -1,26 +1,39 @@
-43c43
-< const print = import(std).debug.print; // Oops!
----
-> const print = @import("std").debug.print;
-60,61c60,61
-<     ??? = &narcissus;
-<     ??? = &narcissus;
----
->     narcissus.me = &narcissus;
->     narcissus.myself = &narcissus;
-71c71
-<     const T2 = narcissus.fetchTheMostBeautifulType();
----
->     const T2 = Narcissus.fetchTheMostBeautifulType();
-106c106
-<     if (fields[0].??? != void) {
----
->     if (fields[0].field_type != void) {
-110c110
-<     if (fields[1].??? != void) {
----
->     if (fields[1].field_type != void) {
-114c114
-<     if (fields[2].??? != void) {
----
->     if (fields[2].field_type != void) {
+--- exercises/065_builtins2.zig
++++ answers/065_builtins2.zig
+@@ -58,7 +58,7 @@
+     // Oops! We cannot leave the 'me' and 'myself' fields
+     // undefined. Please set them here:
+     narcissus.me = &narcissus;
+-    narcissus.??? = ???;
++    narcissus.myself = &narcissus;
+ 
+     // This determines a "peer type" from three separate
+     // references (they just happen to all be the same object).
+@@ -70,7 +70,7 @@
+     //
+     // The fix for this is very subtle, but it makes a big
+     // difference!
+-    const Type2 = narcissus.fetchTheMostBeautifulType();
++    const Type2 = Narcissus.fetchTheMostBeautifulType();
+ 
+     // Now we print a pithy statement about Narcissus.
+     print("A {s} loves all {s}es. ", .{
+@@ -109,15 +109,15 @@
+     // Please complete these 'if' statements so that the field
+     // name will not be printed if the field is of type 'void'
+     // (which is a zero-bit type that takes up no space at all!):
+-    if (fields[0].??? != void) {
++    if (fields[0].field_type != void) {
+         print(" {s}", .{@typeInfo(Narcissus).Struct.fields[0].name});
+     }
+ 
+-    if (fields[1].??? != void) {
++    if (fields[1].field_type != void) {
+         print(" {s}", .{@typeInfo(Narcissus).Struct.fields[1].name});
+     }
+ 
+-    if (fields[2].??? != void) {
++    if (fields[2].field_type != void) {
+         print(" {s}", .{@typeInfo(Narcissus).Struct.fields[2].name});
+     }
+