From 9eebba10ea21ace7cabc777ef9f76ea7ad3069eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Motiejus=20Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 10 Feb 2026 22:48:38 +0000
Subject: [PATCH] parser: port remaining asm tests

Port tests:
- "asm expression with comptime content"
- "simple asm"

Fix asm_output to handle (identifier) operand without arrow.
Fix asm_simple zigData mapping to use node_and_token.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 parser.c        | 11 ++++---
 parser_test.zig | 83 ++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 88 insertions(+), 6 deletions(-)

diff --git a/parser.c b/parser.c
index 65f8fd648f..a2fd3e3eaa 100644
--- a/parser.c
+++ b/parser.c
@@ -2046,17 +2046,18 @@ static AstNodeIndex parseAsmOutputItem(Parser* p) {
         expectToken(p, TOKEN_R_BRACKET);
         expectToken(p, TOKEN_STRING_LITERAL);
         expectToken(p, TOKEN_L_PAREN);
-        AstNodeIndex operand = 0;
-        if (p->token_tags[p->tok_i] == TOKEN_ARROW) {
-            p->tok_i++;
-            operand = parseTypeExpr(p);
+        AstNodeIndex type_expr = 0;
+        if (eatToken(p, TOKEN_ARROW) != null_token) {
+            type_expr = parseTypeExpr(p);
+        } else {
+            expectToken(p, TOKEN_IDENTIFIER);
         }
         const AstTokenIndex rparen = expectToken(p, TOKEN_R_PAREN);
         return addNode(&p->nodes,
             (AstNodeItem) {
                 .tag = AST_NODE_ASM_OUTPUT,
                 .main_token = ident,
-                .data = { .lhs = operand, .rhs = rparen },
+                .data = { .lhs = type_expr, .rhs = rparen },
             });
     }
     return null_node;
diff --git a/parser_test.zig b/parser_test.zig
index 297411536e..1da5422e35 100644
--- a/parser_test.zig
+++ b/parser_test.zig
@@ -381,6 +381,7 @@ fn zigData(tag: Ast.Node.Tag, lhs: u32, rhs: u32) Ast.Node.Data {
         // .node_and_token
         .grouped_expression,
         .asm_input,
+        .asm_simple,
         .field_access,
         .unwrap_optional,
         => .{ .node_and_token = .{ toIndex(lhs), rhs } },
@@ -428,7 +429,6 @@ fn zigData(tag: Ast.Node.Tag, lhs: u32, rhs: u32) Ast.Node.Data {
         .@"for",
         => .{ .@"for" = .{ toExtraIndex(lhs), @bitCast(rhs) } },
 
-        .asm_simple,
         .asm_legacy,
         => .{ .node_and_extra = .{ toIndex(lhs), toExtraIndex(rhs) } },
     };
@@ -1133,6 +1133,50 @@ test "zig fmt: builtin call with trailing comma" {
     );
 }
 
+test "zig fmt: asm expression with comptime content" {
+    try testTransform(
+        \\comptime {
+        \\    asm ("foo" ++ "bar");
+        \\}
+        \\pub fn main() void {
+        \\    asm volatile ("foo" ++ "bar");
+        \\    asm volatile ("foo" ++ "bar"
+        \\        : [_] "" (x),
+        \\    );
+        \\    asm volatile ("foo" ++ "bar"
+        \\        : [_] "" (x),
+        \\        : [_] "" (y),
+        \\    );
+        \\    asm volatile ("foo" ++ "bar"
+        \\        : [_] "" (x),
+        \\        : [_] "" (y),
+        \\        : "h", "e", "l", "l", "o"
+        \\    );
+        \\}
+        \\
+    ,
+        \\comptime {
+        \\    asm ("foo" ++ "bar");
+        \\}
+        \\pub fn main() void {
+        \\    asm volatile ("foo" ++ "bar");
+        \\    asm volatile ("foo" ++ "bar"
+        \\        : [_] "" (x),
+        \\    );
+        \\    asm volatile ("foo" ++ "bar"
+        \\        : [_] "" (x),
+        \\        : [_] "" (y),
+        \\    );
+        \\    asm volatile ("foo" ++ "bar"
+        \\        : [_] "" (x),
+        \\        : [_] "" (y),
+        \\        : .{ .h = true, .e = true, .l = true, .l = true, .o = true }
+        \\    );
+        \\}
+        \\
+    );
+}
+
 test "zig fmt: array types last token" {
     try testCanonical(
         \\test {
@@ -2633,6 +2677,43 @@ test "zig fmt: extra newlines at the end" {
     );
 }
 
+test "zig fmt: simple asm" {
+    try testTransform(
+        \\comptime {
+        \\    asm volatile (
+        \\        \\.globl aoeu;
+        \\        \\.type aoeu, @function;
+        \\        \\.set aoeu, derp;
+        \\    );
+        \\
+        \\    asm ("not real assembly"
+        \\        :[a] "x" (x),);
+        \\    asm ("not real assembly"
+        \\        :[a] "x" (->i32),:[a] "x" (1),);
+        \\    asm ("still not real assembly"
+        \\        :::"a","b",);
+        \\}
+    ,
+        \\comptime {
+        \\    asm volatile (
+        \\        \\.globl aoeu;
+        \\        \\.type aoeu, @function;
+        \\        \\.set aoeu, derp;
+        \\    );
+        \\
+        \\    asm ("not real assembly"
+        \\        : [a] "x" (x),
+        \\    );
+        \\    asm ("not real assembly"
+        \\        : [a] "x" (-> i32),
+        \\        : [a] "x" (1),
+        \\    );
+        \\    asm ("still not real assembly" ::: .{ .a = true, .b = true });
+        \\}
+        \\
+    );
+}
+
 test "zig fmt: nested struct literal with one item" {
     try testCanonical(
         \\const a = foo{