stage2: Support initializing anonymous struct type

This commit adds support for initializing `.anon_struct` types. There
is also some follow-up work to do for both tuples and structs regarding
comptime fields, so this also adds some tests to keep track of that
work.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/type.zig b/src/type.zig
index 9552d734ba..1de4dd5ae0 100644
--- a/src/type.zig
+++ b/src/type.zig
@@ -5432,6 +5432,24 @@ pub const Type = extern union {
         }
     }
 
+    pub fn structFieldDefaultValue(ty: Type, index: usize) Value {
+        switch (ty.tag()) {
+            .@"struct" => {
+                const struct_obj = ty.castTag(.@"struct").?.data;
+                return struct_obj.fields.values()[index].default_val;
+            },
+            .tuple => {
+                const tuple = ty.castTag(.tuple).?.data;
+                return tuple.values[index];
+            },
+            .anon_struct => {
+                const struct_obj = ty.castTag(.anon_struct).?.data;
+                return struct_obj.values[index];
+            },
+            else => unreachable,
+        }
+    }
+
     pub fn structFieldValueComptime(ty: Type, index: usize) ?Value {
         switch (ty.tag()) {
             .@"struct" => {