[gentoo-commits] proj/libbash:master commit in: src/core/, src/core/tests/

[Petteri Räty]

commit:     dc956e48bb51489eccf1be4793d556490aac2278
Author:     Mu Qiao <qiaomuf <AT> gentoo <DOT> org>
AuthorDate: Mon Apr  4 05:29:06 2011 +0000
Commit:     Petteri Räty <betelgeuse <AT> gentoo <DOT> org>
CommitDate: Mon Apr  4 15:09:07 2011 +0000
URL:        http://git.overlays.gentoo.org/gitweb/?p=proj/libbash.git;a=commit;h=dc956e48

Add a method indicating whether a variable is unset

---
 src/core/interpreter.h              |    8 ++++++++
 src/core/tests/interpreter_test.cpp |    8 ++++++++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/src/core/interpreter.h b/src/core/interpreter.h
index 858916e..1ce1076 100644
--- a/src/core/interpreter.h
+++ b/src/core/interpreter.h
@@ -371,6 +371,14 @@ public:
       return true;
   }
 
+  /// \brief check whether the value of the variable is unset
+  /// \param variable name
+  /// \return whether the value of the variable is unset
+  bool is_unset(const std::string& name)
+  {
+    return !members.resolve(name);
+  }
+
   /// \brief update the variable value, raise interpreter_exception if
   ///        it's readonly, will define the variable if it doesn't exist
   /// \param variable name

diff --git a/src/core/tests/interpreter_test.cpp b/src/core/tests/interpreter_test.cpp
index c3f7888..6f8d0c4 100644
--- a/src/core/tests/interpreter_test.cpp
+++ b/src/core/tests/interpreter_test.cpp
@@ -53,6 +53,14 @@ TEST(interpreter, is_null)
   EXPECT_TRUE(walker.is_null("foo"));
 }
 
+TEST(interpreter, is_unset)
+{
+  interpreter walker;
+  walker.define("foo", "hello");
+  EXPECT_FALSE(walker.is_unset("foo"));
+  EXPECT_TRUE(walker.is_unset("bar"));
+}
+
 TEST(interpreter, set_int_value)
 {
   interpreter walker;