Introduce cmSubcommandTable

1 files changed, 31 insertions, 0 deletions

diff --git a/Source/cmSubcommandTable.cxx b/Source/cmSubcommandTable.cxx
new file mode 100644
index 0000000..f6194f8
--- /dev/null
+++ b/Source/cmSubcommandTable.cxx
@@ -0,0 +1,31 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmSubcommandTable.h"
+
+#include <algorithm>
+
+#include "cmExecutionStatus.h"
+#include "cmStringAlgorithms.h"
+
+cmSubcommandTable::cmSubcommandTable(std::initializer_list<InitElem> init)
+  : Impl(init.begin(), init.end())
+{
+  std::sort(this->Impl.begin(), this->Impl.end(),
+            [](Elem const& left, Elem const& right) {
+              return left.first < right.first;
+            });
+}
+
+bool cmSubcommandTable::operator()(cm::string_view key,
+                                   std::vector<std::string> const& args,
+                                   cmExecutionStatus& status) const
+{
+  auto const it = std::lower_bound(
+    this->Impl.begin(), this->Impl.end(), key,
+    [](Elem const& elem, cm::string_view k) { return elem.first < k; });
+  if (it != this->Impl.end() && it->first == key) {
+    return it->second(args, status);
+  }
+  status.SetError(cmStrCat("does not recognize sub-command ", key));
+  return false;
+}