Introduce cmArgumentParser

2 files changed, 149 insertions, 0 deletions

diff --git a/Tests/CMakeLib/CMakeLists.txt b/Tests/CMakeLib/CMakeLists.txt
index 91f7e25..031ab01 100644
--- a/Tests/CMakeLib/CMakeLists.txt
+++ b/Tests/CMakeLib/CMakeLists.txt
@@ -5,6 +5,7 @@ include_directories(
   )
 
 set(CMakeLib_TESTS
+  testArgumentParser.cxx
   testGeneratedFileStream.cxx
   testRST.cxx
   testRange.cxx
diff --git a/Tests/CMakeLib/testArgumentParser.cxx b/Tests/CMakeLib/testArgumentParser.cxx
new file mode 100644
index 0000000..788fece
--- /dev/null
+++ b/Tests/CMakeLib/testArgumentParser.cxx
@@ -0,0 +1,148 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+
+#include "cmArgumentParser.h"
+
+#include "cm_static_string_view.hxx"
+#include "cm_string_view.hxx"
+
+#include <initializer_list>
+#include <iostream>
+#include <string>
+#include <vector>
+
+namespace {
+
+struct Result
+{
+  bool Option1 = false;
+  bool Option2 = false;
+
+  std::string String1;
+  std::string String2;
+
+  std::vector<std::string> List1;
+  std::vector<std::string> List2;
+  std::vector<std::string> List3;
+
+  std::vector<std::vector<std::string>> Multi1;
+  std::vector<std::vector<std::string>> Multi2;
+  std::vector<std::vector<std::string>> Multi3;
+};
+
+std::initializer_list<cm::string_view> const args = {
+  /* clang-format off */
+  "OPTION_1",                // option
+  "STRING_1",                // string arg missing value
+  "STRING_2", "foo", "bar",  // string arg + unparsed value
+  "LIST_1",                  // list arg missing values
+  "LIST_2", "foo", "bar",    // list arg with 2 elems
+  "LIST_3", "bar",           // list arg ...
+  "LIST_3", "foo",           // ... with continuation
+  "MULTI_2",                 // multi list with 0 lists
+  "MULTI_3", "foo", "bar",   // multi list with first list with two elems
+  "MULTI_3", "bar", "foo",   // multi list with second list with two elems
+  /* clang-format on */
+};
+
+bool verifyResult(Result const& result,
+                  std::vector<std::string> const& unparsedArguments,
+                  std::vector<std::string> const& keywordsMissingValue)
+{
+  static std::vector<std::string> const foobar = { "foo", "bar" };
+  static std::vector<std::string> const barfoo = { "bar", "foo" };
+  static std::vector<std::string> const missing = { "STRING_1", "LIST_1" };
+
+#define ASSERT_TRUE(x)                                                        \
+  do {                                                                        \
+    if (!(x)) {                                                               \
+      std::cout << "ASSERT_TRUE(" #x ") failed on line " << __LINE__ << "\n"; \
+      return false;                                                           \
+    }                                                                         \
+  } while (false)
+
+  ASSERT_TRUE(result.Option1);
+  ASSERT_TRUE(!result.Option2);
+
+  ASSERT_TRUE(result.String1.empty());
+  ASSERT_TRUE(result.String2 == "foo");
+
+  ASSERT_TRUE(result.List1.empty());
+  ASSERT_TRUE(result.List2 == foobar);
+  ASSERT_TRUE(result.List3 == barfoo);
+
+  ASSERT_TRUE(result.Multi1.empty());
+  ASSERT_TRUE(result.Multi2.size() == 1);
+  ASSERT_TRUE(result.Multi2[0].empty());
+  ASSERT_TRUE(result.Multi3.size() == 2);
+  ASSERT_TRUE(result.Multi3[0] == foobar);
+  ASSERT_TRUE(result.Multi3[1] == barfoo);
+
+  ASSERT_TRUE(unparsedArguments.size() == 1);
+  ASSERT_TRUE(unparsedArguments[0] == "bar");
+  ASSERT_TRUE(keywordsMissingValue == missing);
+
+  return true;
+}
+
+bool testArgumentParserDynamic()
+{
+  Result result;
+  std::vector<std::string> unparsedArguments;
+  std::vector<std::string> keywordsMissingValue;
+
+  cmArgumentParser<void>{}
+    .Bind("OPTION_1"_s, result.Option1)
+    .Bind("OPTION_2"_s, result.Option2)
+    .Bind("STRING_1"_s, result.String1)
+    .Bind("STRING_2"_s, result.String2)
+    .Bind("LIST_1"_s, result.List1)
+    .Bind("LIST_2"_s, result.List2)
+    .Bind("LIST_3"_s, result.List3)
+    .Bind("MULTI_1"_s, result.Multi1)
+    .Bind("MULTI_2"_s, result.Multi2)
+    .Bind("MULTI_3"_s, result.Multi3)
+    .Parse(args, &unparsedArguments, &keywordsMissingValue);
+
+  return verifyResult(result, unparsedArguments, keywordsMissingValue);
+}
+
+bool testArgumentParserStatic()
+{
+  static auto const parser = //
+    cmArgumentParser<Result>{}
+      .Bind("OPTION_1"_s, &Result::Option1)
+      .Bind("OPTION_2"_s, &Result::Option2)
+      .Bind("STRING_1"_s, &Result::String1)
+      .Bind("STRING_2"_s, &Result::String2)
+      .Bind("LIST_1"_s, &Result::List1)
+      .Bind("LIST_2"_s, &Result::List2)
+      .Bind("LIST_3"_s, &Result::List3)
+      .Bind("MULTI_1"_s, &Result::Multi1)
+      .Bind("MULTI_2"_s, &Result::Multi2)
+      .Bind("MULTI_3"_s, &Result::Multi3);
+
+  std::vector<std::string> unparsedArguments;
+  std::vector<std::string> keywordsMissingValue;
+  Result const result =
+    parser.Parse(args, &unparsedArguments, &keywordsMissingValue);
+
+  return verifyResult(result, unparsedArguments, keywordsMissingValue);
+}
+
+} // namespace
+
+int testArgumentParser(int /*unused*/, char* /*unused*/ [])
+{
+  if (!testArgumentParserDynamic()) {
+    std::cout << "While executing testArgumentParserDynamic().\n";
+    return -1;
+  }
+
+  if (!testArgumentParserStatic()) {
+    std::cout << "While executing testArgumentParserStatic().\n";
+    return -1;
+  }
+
+  return 0;
+}