gnu: tensorflow: Install C headers.
* gnu/packages/machine-learning.scm (tensorflow)[arguments]: Add build phase 'patch-cmake-file-to-install-c-headers; move setting of LDFLAGS from 'build-pip-package to 'unpack-third-party-sources; move 'build-pip-package after 'install phase. [source]: Add patch. * gnu/packages/patches/tensorflow-c-api-fix.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it.master
parent
2d5965979d
commit
9e644d979d
|
@ -1828,6 +1828,7 @@ dist_patch_DATA = \
|
|||
%D%/packages/patches/tclxml-3.2-install.patch \
|
||||
%D%/packages/patches/tcsh-fix-autotest.patch \
|
||||
%D%/packages/patches/teensy-loader-cli-help.patch \
|
||||
%D%/packages/patches/tensorflow-c-api-fix.patch \
|
||||
%D%/packages/patches/texinfo-5-perl-compat.patch \
|
||||
%D%/packages/patches/telegram-purple-adjust-test.patch \
|
||||
%D%/packages/patches/texi2html-document-encoding.patch \
|
||||
|
|
|
@ -1766,7 +1766,9 @@ Python.")
|
|||
(file-name (string-append "tensorflow-" version "-checkout"))
|
||||
(sha256
|
||||
(base32
|
||||
"0a9kwha395g3wgxfwln5j8vn9nkspmd75xldrlqdq540w996g8xa"))))
|
||||
"0a9kwha395g3wgxfwln5j8vn9nkspmd75xldrlqdq540w996g8xa"))
|
||||
(patches
|
||||
(search-patches "tensorflow-c-api-fix.patch"))))
|
||||
(build-system cmake-build-system)
|
||||
(arguments
|
||||
`(#:tests? #f ; no "check" target
|
||||
|
@ -1949,7 +1951,7 @@ set(eigen_INCLUDE_DIRS ${CMAKE_CURRENT_BINARY_DIR}/external/eigen_archive "
|
|||
;; This directory is a dependency of many targets.
|
||||
(mkdir-p "protobuf")))
|
||||
(add-after 'configure 'unpack-third-party-sources
|
||||
(lambda* (#:key inputs #:allow-other-keys)
|
||||
(lambda* (#:key inputs outputs #:allow-other-keys)
|
||||
;; This is needed to configure bundled packages properly.
|
||||
(setenv "CONFIG_SHELL" (which "bash"))
|
||||
(for-each
|
||||
|
@ -1987,7 +1989,11 @@ set(eigen_INCLUDE_DIRS ${CMAKE_CURRENT_BINARY_DIR}/external/eigen_archive "
|
|||
"re2"))
|
||||
|
||||
(rename-file "../build/cub/src/cub/cub-1.8.0/"
|
||||
"../build/cub/src/cub/cub/")))
|
||||
"../build/cub/src/cub/cub/")
|
||||
|
||||
(setenv "LDFLAGS"
|
||||
(string-append "-Wl,-rpath="
|
||||
(assoc-ref outputs "out") "/lib"))))
|
||||
(add-after 'unpack 'fix-python-build
|
||||
(lambda* (#:key inputs outputs #:allow-other-keys)
|
||||
(mkdir-p "protobuf-src")
|
||||
|
@ -2023,11 +2029,21 @@ set(eigen_INCLUDE_DIRS ${CMAKE_CURRENT_BINARY_DIR}/external/eigen_archive "
|
|||
COMPILE_FLAGS ${target_compile_flags} \
|
||||
INSTALL_RPATH_USE_LINK_PATH TRUE \
|
||||
INSTALL_RPATH " (assoc-ref outputs "out") "/lib)\n")))))
|
||||
(add-after 'build 'build-pip-package
|
||||
(add-after 'unpack 'patch-cmake-file-to-install-c-headers
|
||||
(lambda _
|
||||
(substitute* "tensorflow/contrib/cmake/tf_c.cmake"
|
||||
(("if\\(tensorflow_BUILD_PYTHON_BINDINGS" m)
|
||||
(string-append
|
||||
"install(DIRECTORY ${tensorflow_source_dir}/tensorflow/c/ \
|
||||
DESTINATION include/tensorflow/c FILES_MATCHING PATTERN \"*.h\")\n" m)))))
|
||||
(add-after 'build 'build-c-bindings
|
||||
(lambda* (#:key outputs parallel-build? #:allow-other-keys)
|
||||
(invoke "make" "-j" (if parallel-build?
|
||||
(number->string (parallel-job-count))
|
||||
"1")
|
||||
"tf_c")))
|
||||
(add-after 'install 'build-pip-package
|
||||
(lambda* (#:key outputs parallel-build? #:allow-other-keys)
|
||||
(setenv "LDFLAGS"
|
||||
(string-append "-Wl,-rpath="
|
||||
(assoc-ref outputs "out") "/lib"))
|
||||
(invoke "make" "-j" (if parallel-build?
|
||||
(number->string (parallel-job-count))
|
||||
"1")
|
||||
|
|
|
@ -0,0 +1,312 @@
|
|||
From eb61daae91432be0b07bb2f6854887bedfa6fc95 Mon Sep 17 00:00:00 2001
|
||||
From: Asim Shankar <ashankar@google.com>
|
||||
Date: Tue, 26 Jun 2018 00:57:33 -0700
|
||||
Subject: [PATCH] [C API]: Bugfix for TF_AddGradients.
|
||||
|
||||
TF_AddGradients could create nodes in the graph with names that conflicted with
|
||||
other nodes in the graph. This would most clearly happen if TF_AddGradients()
|
||||
was called twice on the same graph, and could also happen if there were other
|
||||
nodes in the graph that happened to have "gradients" as a prefix of their name.
|
||||
|
||||
Fix that.
|
||||
|
||||
The added test in c_api_test.cc would fail in the call to TF_SessionRun() with
|
||||
Node 'gradients/OnesLike' is not unique
|
||||
without the changes to c_api.cc and c_api_internal.h
|
||||
|
||||
While at it, also fixed a possible name collision bug when using the C++ API
|
||||
to constructor graphs (using Scope).
|
||||
|
||||
Thanks @karllessard for pointing this out.
|
||||
|
||||
PiperOrigin-RevId: 202087996
|
||||
---
|
||||
tensorflow/c/c_api.cc | 13 ++++-
|
||||
tensorflow/c/c_api_test.cc | 65 ++++++++++++++++++++++--
|
||||
tensorflow/c/c_test_util.cc | 7 +++
|
||||
tensorflow/c/c_test_util.h | 3 ++
|
||||
tensorflow/cc/framework/scope.cc | 30 ++++++++---
|
||||
tensorflow/cc/framework/scope_internal.h | 3 +-
|
||||
tensorflow/cc/framework/scope_test.cc | 10 ++++
|
||||
7 files changed, 116 insertions(+), 15 deletions(-)
|
||||
|
||||
diff --git a/tensorflow/c/c_api.cc b/tensorflow/c/c_api.cc
|
||||
index 09a03639d6fa3..37c8302e08bc3 100644
|
||||
--- a/tensorflow/c/c_api.cc
|
||||
+++ b/tensorflow/c/c_api.cc
|
||||
@@ -2414,7 +2414,18 @@ void TF_AddGradients(TF_Graph* g, TF_Output* y, int ny, TF_Output* x, int nx,
|
||||
for (int i = first_new_node_id; i < g->graph.num_node_ids(); ++i) {
|
||||
Node* n = g->graph.FindNodeId(i);
|
||||
if (n == nullptr) continue;
|
||||
- g->name_map[n->name()] = n;
|
||||
+ // We have a convoluted scheme here: Using the C++ graph construction API
|
||||
+ // to add potentially many nodes to the graph without running the checks
|
||||
+ // (such as uniqueness of the names of nodes) we run with other functions
|
||||
+ // that add a node to the graph (like TF_FinishOperation).
|
||||
+ if (!g->name_map.insert(std::make_pair(n->name(), n)).second) {
|
||||
+ status->status = tensorflow::errors::Internal(
|
||||
+ "BUG: The API allowed construction of a graph with duplicate node "
|
||||
+ "names (",
|
||||
+ n->name(),
|
||||
+ "). This is a bug. Please file an issue at "
|
||||
+ "https://github.com/tensorflow/tensorflow/issues.");
|
||||
+ }
|
||||
}
|
||||
}
|
||||
|
||||
diff --git a/tensorflow/c/c_api_test.cc b/tensorflow/c/c_api_test.cc
|
||||
index 577f10c5e69ea..bc04b53fbb7fa 100644
|
||||
--- a/tensorflow/c/c_api_test.cc
|
||||
+++ b/tensorflow/c/c_api_test.cc
|
||||
@@ -1160,7 +1160,7 @@ TEST(CAPI, GetOpDef) {
|
||||
}
|
||||
|
||||
void StringVectorToArrays(const std::vector<string>& v,
|
||||
- std::unique_ptr<const void* []>* ptrs,
|
||||
+ std::unique_ptr<const void*[]>* ptrs,
|
||||
std::unique_ptr<size_t[]>* lens) {
|
||||
ptrs->reset(new const void*[v.size()]);
|
||||
lens->reset(new size_t[v.size()]);
|
||||
@@ -1196,7 +1196,7 @@ class CApiColocationTest : public ::testing::Test {
|
||||
|
||||
void SetViaStringList(TF_OperationDescription* desc,
|
||||
const std::vector<string>& list) {
|
||||
- std::unique_ptr<const void* []> list_ptrs;
|
||||
+ std::unique_ptr<const void*[]> list_ptrs;
|
||||
std::unique_ptr<size_t[]> list_lens;
|
||||
StringVectorToArrays(list, &list_ptrs, &list_lens);
|
||||
TF_SetAttrStringList(desc, tensorflow::kColocationAttrName, list_ptrs.get(),
|
||||
@@ -1700,6 +1700,61 @@ TEST_F(CApiGradientsTest, OpWithNoGradientRegistered_NoGradInputs) {
|
||||
TestGradientsError(false);
|
||||
}
|
||||
|
||||
+void ScalarFloatFromTensor(const TF_Tensor* t, float* f) {
|
||||
+ ASSERT_TRUE(t != nullptr);
|
||||
+ ASSERT_EQ(TF_FLOAT, TF_TensorType(t));
|
||||
+ ASSERT_EQ(0, TF_NumDims(t));
|
||||
+ ASSERT_EQ(4, TF_TensorByteSize(t));
|
||||
+ float* p = static_cast<float*>(TF_TensorData(t));
|
||||
+ *f = *p;
|
||||
+}
|
||||
+
|
||||
+TEST_F(CApiGradientsTest, MultipleCallsToAddGradients) {
|
||||
+ const float X = 3.0f, Y = 7.0f;
|
||||
+ TF_Operation* x = Placeholder(graph_, s_, "x", TF_FLOAT);
|
||||
+ TF_Operation* y = Placeholder(graph_, s_, "y", TF_FLOAT);
|
||||
+ TF_Operation* xy = Mul(x, y, graph_, s_, "xy");
|
||||
+ TF_Output dxy_dx, dxy_dy;
|
||||
+
|
||||
+ TF_Output outputs[1] = {{xy, 0}};
|
||||
+ TF_Output inputs[1] = {{x, 0}};
|
||||
+ TF_AddGradients(graph_, outputs, 1, inputs, 1, nullptr, s_, &dxy_dx);
|
||||
+ ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
|
||||
+
|
||||
+ inputs[0] = {y, 0};
|
||||
+ TF_AddGradients(graph_, outputs, 1, inputs, 1, nullptr, s_, &dxy_dy);
|
||||
+ ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
|
||||
+
|
||||
+ TF_SessionOptions* opts = TF_NewSessionOptions();
|
||||
+ TF_Session* sess = TF_NewSession(graph_, opts, s_);
|
||||
+ TF_DeleteSessionOptions(opts);
|
||||
+ ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
|
||||
+
|
||||
+ TF_Output feeds[] = {{x, 0}, {y, 0}};
|
||||
+ TF_Tensor* feedValues[] = {FloatTensor(X), FloatTensor(Y)};
|
||||
+ TF_Output fetches[] = {dxy_dx, dxy_dy};
|
||||
+ TF_Tensor* fetchValues[] = {nullptr, nullptr};
|
||||
+
|
||||
+ TF_SessionRun(sess, nullptr /* run_options */, feeds, feedValues, 2, fetches,
|
||||
+ fetchValues, 2, nullptr /* target_opers */, 0,
|
||||
+ nullptr /* run_metadata */, s_);
|
||||
+ TF_DeleteTensor(feedValues[0]);
|
||||
+ TF_DeleteTensor(feedValues[1]);
|
||||
+ ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
|
||||
+ TF_DeleteSession(sess, s_);
|
||||
+ ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
|
||||
+
|
||||
+ float dxy_dxValue = 0.0f, dxy_dyValue = 0.0f;
|
||||
+ ScalarFloatFromTensor(fetchValues[0], &dxy_dxValue);
|
||||
+ EXPECT_EQ(Y, dxy_dxValue);
|
||||
+
|
||||
+ ScalarFloatFromTensor(fetchValues[1], &dxy_dyValue);
|
||||
+ EXPECT_EQ(X, dxy_dyValue);
|
||||
+
|
||||
+ TF_DeleteTensor(fetchValues[0]);
|
||||
+ TF_DeleteTensor(fetchValues[1]);
|
||||
+}
|
||||
+
|
||||
// REGISTER_OP for CApiAttributesTest test cases.
|
||||
// Registers two ops, each with a single attribute called 'v'.
|
||||
// The attribute in one op will have a type 'type', the other
|
||||
@@ -1784,7 +1839,7 @@ TEST_F(CApiAttributesTest, String) {
|
||||
|
||||
TEST_F(CApiAttributesTest, StringList) {
|
||||
std::vector<string> list = {"bugs", "bunny", "duck"};
|
||||
- std::unique_ptr<const void* []> list_ptrs;
|
||||
+ std::unique_ptr<const void*[]> list_ptrs;
|
||||
std::unique_ptr<size_t[]> list_lens;
|
||||
StringVectorToArrays(list, &list_ptrs, &list_lens);
|
||||
int list_total_size = 0;
|
||||
@@ -1800,7 +1855,7 @@ TEST_F(CApiAttributesTest, StringList) {
|
||||
ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
|
||||
|
||||
EXPECT_TF_META("v", list.size(), TF_ATTR_STRING, list_total_size);
|
||||
- std::unique_ptr<void* []> values(new void*[list.size()]);
|
||||
+ std::unique_ptr<void*[]> values(new void*[list.size()]);
|
||||
std::unique_ptr<size_t[]> lens(new size_t[list.size()]);
|
||||
std::unique_ptr<char[]> storage(new char[list_total_size]);
|
||||
TF_OperationGetAttrStringList(oper, "v", values.get(), lens.get(),
|
||||
@@ -2025,7 +2080,7 @@ TEST_F(CApiAttributesTest, TensorShapeProtoList) {
|
||||
tensorflow::PartialTensorShape(pts2).AsProto(&proto);
|
||||
proto.SerializeToString(&bytes2);
|
||||
|
||||
- std::unique_ptr<const void* []> list_ptrs;
|
||||
+ std::unique_ptr<const void*[]> list_ptrs;
|
||||
std::unique_ptr<size_t[]> list_lens;
|
||||
const std::vector<string> list = {bytes1, bytes2};
|
||||
StringVectorToArrays(list, &list_ptrs, &list_lens);
|
||||
diff --git a/tensorflow/c/c_test_util.cc b/tensorflow/c/c_test_util.cc
|
||||
index f3b28c1708129..24eb6c069b213 100644
|
||||
--- a/tensorflow/c/c_test_util.cc
|
||||
+++ b/tensorflow/c/c_test_util.cc
|
||||
@@ -216,6 +216,13 @@ TF_Operation* Min(TF_Operation* l, TF_Operation* r, TF_Graph* graph,
|
||||
return MinWithDevice(l, r, graph, /*op_device=*/"", s, name);
|
||||
}
|
||||
|
||||
+TF_Operation* Mul(TF_Operation* l, TF_Operation* r, TF_Graph* graph,
|
||||
+ TF_Status* s, const char* name) {
|
||||
+ TF_Operation* op;
|
||||
+ BinaryOpHelper("Mul", l, r, graph, s, name, &op, "", true);
|
||||
+ return op;
|
||||
+}
|
||||
+
|
||||
TF_Operation* Add(TF_Output l, TF_Output r, TF_Graph* graph, TF_Status* s,
|
||||
const char* name) {
|
||||
TF_OperationDescription* desc = TF_NewOperation(graph, "AddN", name);
|
||||
diff --git a/tensorflow/c/c_test_util.h b/tensorflow/c/c_test_util.h
|
||||
index c16aba666ee69..38313d647ca93 100644
|
||||
--- a/tensorflow/c/c_test_util.h
|
||||
+++ b/tensorflow/c/c_test_util.h
|
||||
@@ -80,6 +80,9 @@ TF_Operation* Add(TF_Output l, TF_Output r, TF_Graph* graph, TF_Status* s,
|
||||
TF_Operation* Min(TF_Operation* l, TF_Operation* r, TF_Graph* graph,
|
||||
TF_Status* s, const char* name = "min");
|
||||
|
||||
+TF_Operation* Mul(TF_Operation* l, TF_Operation* r, TF_Graph* graph,
|
||||
+ TF_Status* s, const char* name = "mul");
|
||||
+
|
||||
// If `op_device` is non-empty, set the created op on that device.
|
||||
TF_Operation* MinWithDevice(TF_Operation* l, TF_Operation* r, TF_Graph* graph,
|
||||
const string& op_device, TF_Status* s,
|
||||
diff --git a/tensorflow/cc/framework/scope.cc b/tensorflow/cc/framework/scope.cc
|
||||
index 62a889181e787..8c886f31711eb 100644
|
||||
--- a/tensorflow/cc/framework/scope.cc
|
||||
+++ b/tensorflow/cc/framework/scope.cc
|
||||
@@ -37,6 +37,11 @@ Scope& Scope::operator=(const Scope& other) {
|
||||
return *this;
|
||||
}
|
||||
|
||||
+namespace {
|
||||
+const char kScopeSeparator[] = "/";
|
||||
+const char kSuffixSeparator[] = "_";
|
||||
+} // namespace
|
||||
+
|
||||
Scope::Impl::Impl(Graph* graph, Status* status, NameMap* name_map,
|
||||
ShapeRefiner* refiner, bool disable_shape_inference)
|
||||
: graph_(graph),
|
||||
@@ -308,19 +313,23 @@ string Scope::Impl::GetUniqueName(const string& prefix,
|
||||
return prefix;
|
||||
}
|
||||
auto entry = name_map_->find(prefix);
|
||||
- string unique_name = prefix;
|
||||
if (entry == name_map_->end()) {
|
||||
name_map_->insert({prefix, 0});
|
||||
- } else {
|
||||
- unique_name = strings::StrCat(unique_name, "_", ++entry->second);
|
||||
+ return prefix;
|
||||
}
|
||||
+ string unique_name;
|
||||
+ do {
|
||||
+ unique_name = strings::StrCat(prefix, kSuffixSeparator, ++entry->second);
|
||||
+ } while (name_map_->find(unique_name) != name_map_->end());
|
||||
+ name_map_->insert({unique_name, 0});
|
||||
return unique_name;
|
||||
}
|
||||
|
||||
string Scope::Impl::GetNameForOp(const string& default_name) const {
|
||||
const string unique_name =
|
||||
GetUniqueName(default_name, true /* check_single_use */);
|
||||
- const string sep = name_.empty() || unique_name.empty() ? "" : "/";
|
||||
+ const string sep =
|
||||
+ name_.empty() || unique_name.empty() ? "" : kScopeSeparator;
|
||||
return strings::StrCat(name_, sep, unique_name);
|
||||
}
|
||||
|
||||
@@ -345,7 +354,8 @@ Scope Scope::NewSubScope(const string& child_scope_name) const {
|
||||
}
|
||||
const string unique_name =
|
||||
impl()->GetUniqueName(child_scope_name, false /* check_single_use */);
|
||||
- const string sep = impl()->name_.empty() || unique_name.empty() ? "" : "/";
|
||||
+ const string sep =
|
||||
+ impl()->name_.empty() || unique_name.empty() ? "" : kScopeSeparator;
|
||||
return Scope(new Impl(*this, Impl::Tags::ScopeName(),
|
||||
strings::StrCat(impl()->name_, sep, unique_name),
|
||||
false /* copy_names */));
|
||||
@@ -412,7 +422,7 @@ CompositeOpScopes Scope::GetCompositeOpScopes(
|
||||
if (!impl()->single_use_scope()) {
|
||||
Scope child = NewSubScope(impl()->op_name_.empty() ? composite_op_name
|
||||
: impl()->op_name_);
|
||||
- const string child_op_sep = impl()->name_.empty() ? "" : "_";
|
||||
+ const string child_op_sep = impl()->name_.empty() ? "" : kSuffixSeparator;
|
||||
const string child_name =
|
||||
strings::StrCat(impl()->name_, child_op_sep, child.impl()->name_);
|
||||
return {child,
|
||||
@@ -435,7 +445,13 @@ class InternalScope {
|
||||
static Scope NewScope(Graph* graph, Status* status, ShapeRefiner* refiner) {
|
||||
Scope::Impl::NameMap* name_map = new Scope::Impl::NameMap;
|
||||
for (const Node* node : graph->nodes()) {
|
||||
- (*name_map)[node->name()] = 0;
|
||||
+ const string& name = node->name();
|
||||
+ (*name_map)[name] = 0;
|
||||
+ // Add all name prefixes ('/' separated).
|
||||
+ size_t idx = -1;
|
||||
+ while ((idx = name.find(kScopeSeparator, idx + 1)) != string::npos) {
|
||||
+ (*name_map)[name.substr(0, idx)] = 0;
|
||||
+ }
|
||||
}
|
||||
// We provide null destructors for these shared ptrs (except for name_map)
|
||||
// since the caller owns them and doesn't want the scope to destroy them.
|
||||
diff --git a/tensorflow/cc/framework/scope_internal.h b/tensorflow/cc/framework/scope_internal.h
|
||||
index 8efcfed20d0b8..58adaef2e942a 100644
|
||||
--- a/tensorflow/cc/framework/scope_internal.h
|
||||
+++ b/tensorflow/cc/framework/scope_internal.h
|
||||
@@ -34,8 +34,7 @@ class Scope::Impl {
|
||||
// name that has not been used so far in a scope will get no suffix. Later
|
||||
// uses of the same name will get suffixes _1, _2, _3, etc. Multiple scopes
|
||||
// can share the same NameMap. For instance, a new scope created using
|
||||
- // WithControlDependencies() should would share the same NameMap with the
|
||||
- // parent.
|
||||
+ // WithControlDependencies() would share the same NameMap with the parent.
|
||||
typedef std::unordered_map<string, int> NameMap;
|
||||
|
||||
Impl(const std::shared_ptr<Graph>& graph,
|
||||
diff --git a/tensorflow/cc/framework/scope_test.cc b/tensorflow/cc/framework/scope_test.cc
|
||||
index 9eca9d3face34..b40b345eb8423 100644
|
||||
--- a/tensorflow/cc/framework/scope_test.cc
|
||||
+++ b/tensorflow/cc/framework/scope_test.cc
|
||||
@@ -26,6 +26,16 @@ TEST(ScopeTest, BasicNames) {
|
||||
EXPECT_EQ(root.GetUniqueNameForOp("mul"), "mul");
|
||||
}
|
||||
|
||||
+TEST(ScopeTest, OpAndScopeNameCollision) {
|
||||
+ Scope root = Scope::NewRootScope();
|
||||
+ EXPECT_EQ(root.GetUniqueNameForOp("foo"), "foo");
|
||||
+ EXPECT_EQ(root.GetUniqueNameForOp("foo"), "foo_1");
|
||||
+ EXPECT_EQ(root.GetUniqueNameForOp("foo_1"), "foo_1_1");
|
||||
+ EXPECT_EQ(root.GetUniqueNameForOp("foo_2"), "foo_2");
|
||||
+ EXPECT_EQ(root.GetUniqueNameForOp("foo"), "foo_3");
|
||||
+ EXPECT_EQ(root.GetUniqueNameForOp("foo_2"), "foo_2_1");
|
||||
+}
|
||||
+
|
||||
TEST(ScopeTest, HierarchicalNames) {
|
||||
Scope root = Scope::NewRootScope();
|
||||
Scope child = root.NewSubScope("child");
|
Reference in New Issue