Merge pull request #19630 from mlugg/comptime-ptr-access-5

compiler: rework comptime pointer representation and access

Author: andrewrk

lib/compiler/resinator/ico.zig

@@ -232,7 +232,7 @@ test "icon data size too small" {
     try std.testing.expectError(error.ImpossibleDataSize, read(std.testing.allocator, fbs.reader(), data.len));
 }
 
-pub const ImageFormat = enum {
+pub const ImageFormat = enum(u2) {
     dib,
     png,
     riff,
@@ -272,7 +272,7 @@ pub const BitmapHeader = extern struct {
     }
 
     /// https://en.wikipedia.org/wiki/BMP_file_format#DIB_header_(bitmap_information_header)
-    pub const Version = enum {
+    pub const Version = enum(u3) {
         unknown,
         @"win2.0", // Windows 2.0 or later
         @"nt3.1", // Windows NT, 3.1x or later

lib/docs/wasm/markdown/Document.zig

@@ -131,7 +131,7 @@ pub const Node = struct {
         }
     };
 
-    pub const TableCellAlignment = enum {
+    pub const TableCellAlignment = enum(u2) {
         unset,
         left,
         center,

lib/std/net.zig

@@ -271,7 +271,7 @@ pub const Ip4Address = extern struct {
     sa: posix.sockaddr.in,
 
     pub fn parse(buf: []const u8, port: u16) IPv4ParseError!Ip4Address {
-        var result = Ip4Address{
+        var result: Ip4Address = .{
             .sa = .{
                 .port = mem.nativeToBig(u16, port),
                 .addr = undefined,