1 files changed, 35 insertions, 0 deletions
diff --git a/6p30.cpp b/6p30.cpp
new file mode 100644
index 0000000..064b56f
--- /dev/null
+++ b/6p30.cpp
@@ -0,0 +1,35 @@
+#include <iostream>
+
+/*
+ *
+ * 6.30
+ *
+ *
+ */
+
+/*
+bool str_subrange(const std::string &str1, const std::string &str2)
+{
+// same sizes: return normal equality test
+	if (str1.size() == str2.size())
+		return str1 == str2;
+	// ok: == returns bool
+	// find the size of the smaller string; conditional operator, see § 4.7 (p. 151)
+	auto size = (str1.size() < str2.size())
+		? str1.size() : str2.size();
+	
+	// look at each element up to the size of the smaller string
+	for (decltype(size) i = 0; i != size; ++i) {
+		if (str1[i] != str2[i])
+			return; // error #1: no return value; compiler should detect this error
+	}
+	// error #2: control might flow off the end of the function without a return
+	// the compiler might not detect this error
+}
+*/
+
+int main () {
+
+	// Tested both with clang++ and g++ and both detected the error
+	return 0;
+}