From e83b50ca4b7f5586adf4f30125d41e91f92e55f9 Mon Sep 17 00:00:00 2001
From: Chris Ninham <61634310+Nin17@users.noreply.github.com>
Date: Mon, 27 Apr 2026 14:51:59 +0200
Subject: [PATCH 1/3] BUG: torch RuntimeError if no arrays

---
 array_api_compat/torch/_aliases.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/array_api_compat/torch/_aliases.py b/array_api_compat/torch/_aliases.py
index 5969e4db..0105c731 100644
--- a/array_api_compat/torch/_aliases.py
+++ b/array_api_compat/torch/_aliases.py
@@ -936,7 +936,7 @@ def meshgrid(*arrays: Array, indexing: Literal['xy', 'ij'] = 'xy') -> tuple[Arra
     # torch <= 2.9 emits a UserWarning: "torch.meshgrid: in an upcoming release, it
     # will be required to pass the indexing argument."
     # Thus always pass it explicitly.
-    return torch.meshgrid(*arrays, indexing=indexing)
+    return torch.meshgrid(*arrays, indexing=indexing) if arrays else ()
 
 
 __all__ = ['asarray', 'result_type', 'can_cast',

From 72ffa81654eca2a921fc84f478ee3aeb5f5e785d Mon Sep 17 00:00:00 2001
From: Chris Ninham <61634310+Nin17@users.noreply.github.com>
Date: Mon, 27 Apr 2026 15:24:10 +0200
Subject: [PATCH 2/3] TST: torch.meshgrid no arrays

---
 tests/test_torch.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/test_torch.py b/tests/test_torch.py
index b064a46d..3d6ebc46 100644
--- a/tests/test_torch.py
+++ b/tests/test_torch.py
@@ -115,7 +115,7 @@ def apply_clip_compat(a):
 
 
 def test_meshgrid():
-    """Verify that array_api_compat.torch.meshgrid defaults to indexing='xy'."""
+    """Verify that array_api_compat.torch.meshgrid defaults to indexing='xy', and supports passing no arrays."""
 
     x, y = xp.asarray([1, 2]), xp.asarray([4])
 
@@ -142,6 +142,8 @@ def test_meshgrid():
     assert Y.shape == Y_ij.shape
     assert xp.all(Y == Y_ij)
 
+    assert not xp.meshgrid()
+
 
 def test_argsort_stable():
     """Verify that argsort defaults to a stable sort."""

From 8422e6953f14069d7bec82978b9af1df8d3b76e7 Mon Sep 17 00:00:00 2001
From: Chris Ninham <61634310+Nin17@users.noreply.github.com>
Date: Mon, 27 Apr 2026 15:36:34 +0200
Subject: [PATCH 3/3] BUG: torch.meshgrid check indexing first - consistency
 with numpy+jax.numpy

---
 array_api_compat/torch/_aliases.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/array_api_compat/torch/_aliases.py b/array_api_compat/torch/_aliases.py
index 0105c731..e27c3ca2 100644
--- a/array_api_compat/torch/_aliases.py
+++ b/array_api_compat/torch/_aliases.py
@@ -936,6 +936,8 @@ def meshgrid(*arrays: Array, indexing: Literal['xy', 'ij'] = 'xy') -> tuple[Arra
     # torch <= 2.9 emits a UserWarning: "torch.meshgrid: in an upcoming release, it
     # will be required to pass the indexing argument."
     # Thus always pass it explicitly.
+    if indexing not in ("xy", "ij"):
+        raise ValueError(f'torch.meshgrid: indexing must be one of "xy" or "ij", but received: {indexing}')
     return torch.meshgrid(*arrays, indexing=indexing) if arrays else ()