another test case + enforce keyword is the first real token

update blob to allow build

Author: Rexicon226

lib/std/zig/Parse.zig

@@ -370,22 +370,24 @@ fn parseContainerMembers(p: *Parse) !Members {
                 trailing = p.token_tags[p.tok_i - 1] == .semicolon;
             },
             .keyword_autotranslated => {
-                _ = p.assertToken(.keyword_autotranslated);
-                var temp_token: Node.Index = 1;
+                const token = p.assertToken(.keyword_autotranslated);
                 p.expectSemicolon(.expected_semi_after_decl, false) catch |err| {
                     switch (err) {
                         error.OutOfMemory => return error.OutOfMemory,
-                        error.ParseError => {
-                            p.findNextContainerMember();
-                            temp_token = null_node;
-                        },
+                        error.ParseError => continue,
                     }
                 };
 
-                if (temp_token != 0) {
-                    p.is_autotranslated = true;
+                if (p.nodes.len != 1) {
+                    try p.warnMsg(.{
+                        .tag = .autotranslated_not_first_token,
+                        .token = token,
+                    });
+                    continue;
                 }
 
+                p.is_autotranslated = true;
+
                 trailing = p.token_tags[p.tok_i - 1] == .semicolon;
             },
             .eof, .r_brace => {

lib/std/zig/perf_test.zig

@@ -11,7 +11,7 @@ pub fn main() !void {
     var i: usize = 0;
     var timer = try std.time.Timer.start();
     const start = timer.lap();
-    const iterations = 1000;
+    const iterations = 100;
     var memory_used: usize = 0;
     while (i < iterations) : (i += 1) {
         memory_used += testOnce();

src/main.zig

@@ -4416,6 +4416,8 @@ fn cmdTranslateC(comp: *Compilation, arena: Allocator, fancy_output: ?*Compilati
         const formatted = try tree.render(comp.gpa);
         defer comp.gpa.free(formatted);
 
+        try zig_file.writeAll("thisfileisautotranslatedfromc;\n");
+
         try zig_file.writeAll(formatted);
 
         man.writeManifest() catch |err| warn("failed to write cache manifest: {s}", .{

stage1/zig1.wasm

@@ -0,0 +1,12 @@
+export fn a() void {
+    const foo: [*c]u8 = undefined;
+    _ = foo;
+}
+
+thisfileisautotranslatedfromc;
+
+// error
+// backend=stage2
+// target=native
+//
+// :6:1: error: thisfileisautotranslatedfromc must be the first token in the file

test/cases/compile_errors/autotranslated_not_first_token.zig

@@ -1,4 +1,4 @@
-// thisfileisautotranslatedfromc;
+thisfileisautotranslatedfromc;
 
 export fn a() void {
     const foo: [*c]u8 = undefined;

test/cases/compile_errors/c_pointer_without_keyword.zig

@@ -14,4 +14,4 @@ export fn entry2() void {
 //
 // :5:21: error: expected type '[*c]u8', found 'u65'
 // :5:21: note: unsigned 64-bit int cannot represent all possible unsigned 65-bit values
-// :8:36: error: expected type '[*c]u8', found 'comptime_int'
+// :8:36: error: expected type '[*c]u8', found 'comptime_int'

test/cases/compile_errors/implicit_cast_to_c_ptr_from_int.zig

@@ -30,4 +30,4 @@ export fn entry2() void {
 // :8:24: note: '[*c]const u8' could have null values which are illegal in type '[*]const u8'
 // :18:35: error: expected type '[*c][*c]const u8', found '*[*]u8'
 // :18:35: note: pointer type child '[*]u8' cannot cast into pointer type child '[*c]const u8'
-// :18:35: note: mutable '[*]u8' allows illegal null values stored to type '[*c]const u8'
+// :18:35: note: mutable '[*]u8' allows illegal null values stored to type '[*c]const u8'

test/cases/compile_errors/implicit_casting_C_pointers_which_would_mess_up_null_semantics.zig

@@ -19,4 +19,4 @@ comptime {
 // :4:8: note: use '*const ' to make a function pointer type
 // :10:13: error: C pointers cannot point to non-C-ABI-compatible type '[4]fn () callconv(.C) void'
 // :10:13: note: type has no guaranteed in-memory representation
-// :10:13: note: use '*const ' to make a function pointer type
+// :10:13: note: use '*const ' to make a function pointer type

test/cases/compile_errors/old_fn_ptr_in_extern_context.zig

@@ -14,4 +14,4 @@ export fn main() void {
 //
 // :7:22: error: expected type '?fn ([*c]u8, ...) callconv(.C) void', found 'fn ([*:0]u8, ...) callconv(.C) void'
 // :7:22: note: parameter 0 '[*:0]u8' cannot cast into '[*c]u8'
-// :7:22: note: '[*c]u8' could have null values which are illegal in type '[*:0]u8'
+// :7:22: note: '[*c]u8' could have null values which are illegal in type '[*:0]u8'