Update to test zero length tensor support.

WORKSPACE

@@ -5,9 +5,9 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 git_repository(
     name = "ccv",
-    commit = "38eca3efbcb47fc4fcd06d2bd3d81e4bfbd76cd2",
+    commit = "e921d4d66f6def2e8ed082e48a00cebd8306085f",
     remote = "https://github.com/liuliu/ccv.git",
-    shallow_since = "1698450773 -0400",
+    shallow_since = "1699332984 -0500",
 )
 
 load("@ccv//config:ccv.bzl", "ccv_deps", "ccv_setting")

deps.bzl

@@ -17,8 +17,8 @@ def s4nnc_deps():
         git_repository,
         name = "ccv",
         remote = "https://github.com/liuliu/ccv.git",
-        commit = "38eca3efbcb47fc4fcd06d2bd3d81e4bfbd76cd2",
-        shallow_since = "1698450773 -0400",
+        commit = "e921d4d66f6def2e8ed082e48a00cebd8306085f",
+        shallow_since = "1699332984 -0500",
     )
 
     _maybe(

test/graph.swift

@@ -377,6 +377,17 @@ final class GraphTests: XCTestCase {
     XCTAssertEqual(b0[3], a1[0, 1, 0])
   }
 
+  func testConcatZeroLengthTensor() throws {
+    let dynamicGraph = DynamicGraph()
+    let a0 = dynamicGraph.variable(.CPU, format: .NCHW, shape: [], of: Float.self)
+    let a1 = dynamicGraph.variable(Tensor<Float>([1, 2, 3, 4], .CPU, .NC(2, 2)))
+    let b0 = Concat(axis: 1)(inputs: a0, a1)[0].as(of: Float.self)
+    XCTAssertEqual(b0[0, 0], 1)
+    XCTAssertEqual(b0[0, 1], 2)
+    XCTAssertEqual(b0[1, 0], 3)
+    XCTAssertEqual(b0[1, 1], 4)
+  }
+
   static let allTests = [
     ("testGEMM", testGEMM),
     ("testGEMMGrad", testGEMMGrad),
@@ -401,5 +412,6 @@ final class GraphTests: XCTestCase {
     ("testPermute", testPermute),
     ("testPermuteAndGetASubset", testPermuteAndGetASubset),
     ("testPermuteAndReshape", testPermuteAndReshape),
+    ("testConcatZeroLengthTensor", testConcatZeroLengthTensor),
   ]
 }

test/tensor.swift

@@ -3,6 +3,10 @@ import NNC
 import XCTest
 
 final class TensorTests: XCTestCase {
+  func testCreateZeroLengthTensor() throws {
+    let tensor = Tensor<Float>(.CPU, format: .NHWC, shape: [])
+    XCTAssertEqual([], tensor.shape)
+  }
 
   func testGetSetPartTensor() throws {
     var tensor = Tensor<Int32>(.CPU, .NC(5, 2))
@@ -193,6 +197,7 @@ final class TensorTests: XCTestCase {
   }
 
   static let allTests = [
+    ("testCreateZeroLengthTensor", testCreateZeroLengthTensor),
     ("testGetSetPartTensor", testGetSetPartTensor),
     ("testGetSetPartTensorFromArray", testGetSetPartTensorFromArray),
     ("testGetSetUnboundedPartTensorFromArray", testGetSetUnboundedPartTensorFromArray),