chore: unify include guards to #pragma once (#975)

[no important files changed]

Author: ahans

bin/make-stub-files.sh

@@ -21,10 +21,8 @@ for exercise_dir in "${exercises_dir}"/*; do
     header="$exercise_name.h"
     source="$exercise_name.cpp"
     if ! test -f "$header"; then
-        printf "#if !defined(${exercise_name^^}_H)\n" >> $header
-        printf "#define ${exercise_name^^}_H\n" >> $header
+        printf "#pragma once\n" >> $header
         printf "\nnamespace $exercise_name {\n\n}  // namespace $exercise_name\n" >> $header
-        printf "\n#endif // ${exercise_name^^}_H" >> $header
         git add $header
     fi
     if ! test -f "$source"; then

exercises/practice/acronym/.meta/example.h

@@ -1,5 +1,4 @@
-#if !defined(ACRONYM_H)
-#define ACRONYM_H
+#pragma once
 
 #include <string>
 
@@ -8,5 +7,3 @@ namespace acronym {
 std::string acronym(std::string const&);
 
 }
-
-#endif

exercises/practice/acronym/acronym.h

@@ -1,10 +1,7 @@
-#if !defined(ACRONYM_H)
-#define ACRONYM_H
+#pragma once
 
 namespace acronym {
 
 // TODO: add your solution here
 
 }  // namespace acronym
-
-#endif  // ACRONYM_H

exercises/practice/all-your-base/.meta/example.h

@@ -1,5 +1,4 @@
-#if !defined(ALL_YOUR_BASE_H)
-#define ALL_YOUR_BASE_H
+#pragma once
 
 #include <vector>
 
@@ -9,5 +8,3 @@ std::vector<unsigned int> convert(unsigned int input_base,
                                   const std::vector<unsigned int>& input_digits,
                                   unsigned int output_base);
 }
-
-#endif

exercises/practice/all-your-base/all_your_base.h

@@ -1,10 +1,7 @@
-#if !defined(ALL_YOUR_BASE_H)
-#define ALL_YOUR_BASE_H
+#pragma once
 
 namespace all_your_base {
 
 // TODO: add your solution here
 
 }  // namespace all_your_base
-
-#endif  // ALL_YOUR_BASE_H

exercises/practice/allergies/.meta/example.h

@@ -1,5 +1,4 @@
-#if !defined(ALLERGIES_H)
-#define ALLERGIES_H
+#pragma once
 
 #include <map>
 #include <string>
@@ -23,5 +22,3 @@ class allergy_test {
 };
 
 }  // namespace allergies
-
-#endif

exercises/practice/allergies/allergies.h

@@ -1,10 +1,7 @@
-#if !defined(ALLERGIES_H)
-#define ALLERGIES_H
+#pragma once
 
 namespace allergies {
 
 // TODO: add your solution here
 
 }  // namespace allergies
-
-#endif  // ALLERGIES_H

exercises/practice/anagram/.meta/example.h

@@ -1,5 +1,4 @@
-#if !defined(ANAGRAM_H)
-#define ANAGRAM_H
+#pragma once
 
 #include <string>
 #include <vector>
@@ -18,5 +17,3 @@ class anagram {
 };
 
 }  // namespace anagram
-
-#endif

exercises/practice/anagram/anagram.h

@@ -1,10 +1,7 @@
-#if !defined(ANAGRAM_H)
-#define ANAGRAM_H
+#pragma once
 
 namespace anagram {
 
 // TODO: add your solution here
 
 }  // namespace anagram
-
-#endif  // ANAGRAM_H

exercises/practice/armstrong-numbers/.meta/example.h

@@ -1,10 +1,7 @@
-#if !defined(ARMSTRONG_NUMBERS_H_)
-#define ARMSTRONG_NUMBERS_H_
+#pragma once
 
 namespace armstrong_numbers {
 
 bool is_armstrong_number(int number);
 
 }  // namespace armstrong_numbers
-
-#endif  // !ARMSTRONG_NUMBERS_H_