executors: add version checks to self-tests

dmoj/executors/C.py

@@ -8,10 +8,12 @@ class Executor(GCCExecutor):
     test_program = """
 #include <stdio.h>
 
+#if __STDC_VERSION__ == 199901
 int main() {
     int ch;
     while ((ch = getchar()) != EOF)
         putchar(ch);
     return 0;
 }
+#endif
 """

dmoj/executors/C11.py

@@ -9,10 +9,12 @@ class Executor(GCCExecutor):
     test_program = """
 #include <stdio.h>
 
+#if __STDC_VERSION__ == 201112
 int main() {
     int ch;
     while ((ch = getchar()) != EOF)
         putchar(ch);
     return 0;
 }
+#endif
 """

dmoj/executors/CLANGX.py

@@ -1,7 +1,7 @@
-from dmoj.executors.CPP11 import Executor as CPP11Executor
+from dmoj.executors.CPP14 import Executor as CPP14Executor
 from dmoj.executors.clang_executor import ClangExecutor
 
 
-class Executor(ClangExecutor, CPP11Executor):
+class Executor(ClangExecutor, CPP14Executor):
     command = 'clang++'
     command_paths = ['clang++-%s' % i for i in ['3.9', '3.8', '3.7', '3.6', '3.5']] + ['clang++']

dmoj/executors/CPP03.py

@@ -1,20 +1,20 @@
-from typing import Optional
-
 from .gcc_executor import GCCExecutor
 
 
 class Executor(GCCExecutor):
     command = 'g++'
-    std: Optional[str] = None
+    std: str = 'c++03'
     ext = 'cpp'
     test_program = """
 #include <iostream>
 
+#if __cplusplus >= 199711 && __cplusplus < 201103
 int main() {
     std::cout << std::cin.rdbuf();
     return 0;
 }
+#endif
 """
 
     def get_flags(self):
-        return (['-std=%s' % self.std] if self.std else []) + super().get_flags()
+        return ([f'-std={self.std}']) + super().get_flags()

dmoj/executors/CPP11.py

@@ -8,9 +8,11 @@ class Executor(CPPExecutor):
     test_program = """
 #include <iostream>
 
+#if __cplusplus == 201103
 int main() {
     auto input = std::cin.rdbuf();
     std::cout << input;
     return 0;
 }
+#endif
 """

dmoj/executors/CPP14.py

@@ -12,8 +12,10 @@ class Executor(CPPExecutor):
     return std::cin.rdbuf();
 }
 
+#if __cplusplus == 201402
 int main() {
     std::cout << input();
     return 0;
 }
+#endif
 """

dmoj/executors/CPP17.py

@@ -8,10 +8,12 @@ class Executor(CPPExecutor):
     test_program = """
 #include <iostream>
 
+#if __cplusplus == 201703
 int main() {
     float literal = 0x3.ABCp-10;
     auto input = std::cin.rdbuf();
     std::cout << input;
     return 0;
 }
+#endif
 """

dmoj/executors/CPP20.py

@@ -8,10 +8,12 @@ class Executor(CPPExecutor):
     test_program = """
 #include <iostream>
 
+#if __cplusplus == 202002
 int main() {
     std::strong_ordering comparison = 1 <=> 2;
     auto input = std::cin.rdbuf();
     std::cout << input;
     return 0;
 }
+#endif
 """

dmoj/executors/PY2.py

@@ -4,4 +4,8 @@
 class Executor(PythonExecutor):
     command = 'python'
     command_paths = ['python2.7', 'python2', 'python']
-    test_program = "print __import__('sys').stdin.read()"
+    test_program = """
+import sys
+if sys.version_info.major == 2:
+    print sys.stdin.read()
+"""

dmoj/executors/PY3.py

@@ -4,4 +4,8 @@
 class Executor(PythonExecutor):
     command = 'python3'
     command_paths = ['python%s' % i for i in ['3.6', '3.5', '3.4', '3.3', '3.2', '3.1', '3']]
-    test_program = "print(__import__('sys').stdin.read(), end='')"
+    test_program = """
+import sys
+if sys.version_info.major == 3:
+    print(sys.stdin.read(), end='')
+"""

dmoj/executors/PYPY.py

@@ -5,7 +5,11 @@
 
 class Executor(PythonExecutor):
     command = 'pypy'
-    test_program = "print __import__('sys').stdin.read()"
+    test_program = """
+import sys
+if sys.version_info.major == 2:
+    print sys.stdin.read()
+"""
     _pypy_versions: List[Tuple[int, ...]]
 
     @classmethod

dmoj/executors/PYPY3.py

@@ -3,4 +3,8 @@
 
 class Executor(PYPYExecutor):
     command = 'pypy3'
-    test_program = "print(__import__('sys').stdin.read(), end='')"
+    test_program = """
+import sys
+if sys.version_info.major == 3:
+    print(sys.stdin.read(), end='')
+"""