std.mem: add `first` method to `SplitIterator` and `SplitBackwardsIterator`

3 files changed, 5 insertions, 8 deletions

diff --git a/src/Compilation.zig b/src/Compilation.zig
index 5204910193..347f1ea0f5 100644
--- a/src/Compilation.zig
+++ b/src/Compilation.zig
@@ -4392,7 +4392,7 @@ pub fn hasSharedLibraryExt(filename: []const u8) bool {
     }
     // Look for .so.X, .so.X.Y, .so.X.Y.Z
     var it = mem.split(u8, filename, ".");
-    _ = it.next().?;
+    _ = it.first();
     var so_txt = it.next() orelse return false;
     while (!mem.eql(u8, so_txt, "so")) {
         so_txt = it.next() orelse return false;
diff --git a/src/libc_installation.zig b/src/libc_installation.zig
index 0b40580d7b..f9f6b37fba 100644
--- a/src/libc_installation.zig
+++ b/src/libc_installation.zig
@@ -64,10 +64,7 @@ pub const LibCInstallation = struct {
         while (it.next()) |line| {
             if (line.len == 0 or line[0] == '#') continue;
             var line_it = std.mem.split(u8, line, "=");
-            const name = line_it.next() orelse {
-                log.err("missing equal sign after field name\n", .{});
-                return error.ParseError;
-            };
+            const name = line_it.first();
             const value = line_it.rest();
             inline for (fields) |field, i| {
                 if (std.mem.eql(u8, name, field.name)) {
diff --git a/src/test.zig b/src/test.zig
index 20a7d1673a..554248c2de 100644
--- a/src/test.zig
+++ b/src/test.zig
@@ -303,7 +303,7 @@ const TestManifest = struct {
 
             // Parse key=value(s)
             var kv_it = std.mem.split(u8, trimmed, "=");
-            const key = kv_it.next() orelse return error.MissingKeyForConfig;
+            const key = kv_it.first();
             try manifest.config_map.putNoClobber(key, kv_it.next() orelse return error.MissingValuesForConfig);
         }
 
@@ -697,7 +697,7 @@ pub const TestContext = struct {
                 }
                 // example: "file.zig:1:2: error: bad thing happened"
                 var it = std.mem.split(u8, err_msg_line, ":");
-                const src_path = it.next() orelse @panic("missing colon");
+                const src_path = it.first();
                 const line_text = it.next() orelse @panic("missing line");
                 const col_text = it.next() orelse @panic("missing column");
                 const kind_text = it.next() orelse @panic("missing 'error'/'note'");
@@ -1698,7 +1698,7 @@ pub const TestContext = struct {
                                         var fib = std.io.fixedBufferStream(&buf);
                                         try msg.renderToWriter(.no_color, fib.writer(), "error", .Red, 0);
                                         var it = std.mem.split(u8, fib.getWritten(), "error: ");
-                                        _ = it.next();
+                                        _ = it.first();
                                         const rendered = it.rest();
                                         break :blk rendered[0 .. rendered.len - 1]; // trim final newline
                                     };