stage2: improve `@typeName`

 * make it always return a fully qualified name. stage1 is inconsistent
   about this.
 * AstGen: fix anon_name_strategy to correctly be `func` when anon type
   creation happens in the operand of the return expression.
 * Sema: implement type names for the "function" naming strategy.
 * Put "enum", "union", "opaque", or "struct" in place of "anon" when
   creating respective anonymous Decl names.
 * std.testing: add `expectStringStartsWith`. Didn't end up using it
   after all.

Also this enables the real test runner for stage2 LLVM backend (sans
wasm32) since it works now.

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/std/testing.zig b/lib/std/testing.zig
index c35de990ef..5049218c90 100644
--- a/lib/std/testing.zig
+++ b/lib/std/testing.zig
@@ -445,6 +445,26 @@ pub fn expectEqualStrings(expected: []const u8, actual: []const u8) !void {
     }
 }
 
+pub fn expectStringStartsWith(actual: []const u8, expected_starts_with: []const u8) !void {
+    if (std.mem.startsWith(u8, actual, expected_starts_with))
+        return;
+
+    const shortened_actual = if (actual.len >= expected_starts_with.len)
+        actual[0..expected_starts_with.len]
+    else
+        actual;
+
+    print("\n====== expected to start with: =========\n", .{});
+    printWithVisibleNewlines(expected_starts_with);
+    print("\n====== instead ended with: ===========\n", .{});
+    printWithVisibleNewlines(shortened_actual);
+    print("\n========= full output: ==============\n", .{});
+    printWithVisibleNewlines(actual);
+    print("\n======================================\n", .{});
+
+    return error.TestExpectedStartsWith;
+}
+
 pub fn expectStringEndsWith(actual: []const u8, expected_ends_with: []const u8) !void {
     if (std.mem.endsWith(u8, actual, expected_ends_with))
         return;