fix bug；增加回归测试一枚

Author: duyanning

src/scan.cpp

@@ -19,7 +19,7 @@ void scan(fs::path src_path)
 
 	string line;
 	regex usingcpp_pat{ R"(^\s*#include\s+"([\w\./]+)\.h"\s+//\s+usingcpp)" };
-	regex using_pat{ R"(using\s+([\w\./]+\.(c|cpp|cxx|c\+\+|C|cc|cp|CPP)))" };
+	regex using_pat{ R"(using\s+([\w\./]+\.(cpp|cxx|c\+\+|cc|c)))" }; // | 或的顺序还挺重要，把长的排前边。免得前缀就匹配。
 	regex linklib_pat{ R"(//\s+linklib\s+([\w\-\.]+))" };
 	string compiler_specific_linklib_string = R"(//\s+)" + cc_info[cc].compiler_name;
 	compiler_specific_linklib_string += R"(-linklib\s+([\w\-\.]+))";

test/helloworld/main.cpp

@@ -2,7 +2,7 @@
 #include <vector>
 #include <string>
 
-#include "foo.h" // using  foo.cpp
+#include "foo.h" // using foo.cpp
 #include "bar.h" // using bar.cpp
 
 using namespace std;

test/multiple-srcs/hello.cpp test/multiple-srcs/main.cpptest/multiple-srcs/hello.cpp renamed to test/multiple-srcs/main.cpp

@@ -0,0 +1,6 @@
+#include "bar.h"
+
+int bar()
+{
+    return 3;
+}

test/using-a-cpp-many-times/bar.cpp

@@ -0,0 +1,7 @@
+#ifndef BAR_H
+#define BAR_H
+
+int bar();
+
+
+#endif // BAR_H

test/using-a-cpp-many-times/bar.h

@@ -0,0 +1,10 @@
+#include <iostream>
+#include "foo.h"
+#include "bar.h" // using  bar.cpp
+
+using namespace std;
+
+void foo()
+{
+	bar();
+}

test/using-a-cpp-many-times/foo.cpp

@@ -0,0 +1,8 @@
+#ifndef FOO_H
+#define FOO_H
+
+void foo();
+
+
+
+#endif // FOO_H

test/using-a-cpp-many-times/foo.h

@@ -0,0 +1,16 @@
+#include <iostream>
+#include <vector>
+#include <string>
+
+#include "foo.h" // using foo.cpp
+#include "bar.h" // using bar.cpp
+
+using namespace std;
+
+int main()
+{
+    foo();
+    bar();
+
+    return 0;
+}

test/using-a-cpp-many-times/main.cpp

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+cpps --clear -c gcc -v main.cpp
+# CHECK: compiling main.cpp
+# CHECK-NEXT: compiling foo.cpp
+# CHECK-NEXT: compiling bar.cpp
+# CHECK-NEXT: linking main.cpp.gcc.exe

test/using-a-cpp-many-times/run-gcc.sh

@@ -0,0 +1,7 @@
+@ECHO OFF	
+
+cpps --clear -c mingw -v main.cpp
+rem CHECK: compiling main.cpp
+rem CHECK-NEXT: compiling foo.cpp
+rem CHECK-NEXT: compiling bar.cpp
+rem CHECK-NEXT: linking main.cpp.mingw.exe