refactor: replace manual header guards with #pragma once

It is less error-prone than manually defining header guards. Pretty much
all compilers support it even if it's not part of the C standard.

12 files changed, 12 insertions, 39 deletions

diff --git a/src/nvim/eval/buffer.h b/src/nvim/eval/buffer.h
index 4a2f8f9e94..fdd146885a 100644
--- a/src/nvim/eval/buffer.h
+++ b/src/nvim/eval/buffer.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_BUFFER_H
-#define NVIM_EVAL_BUFFER_H
+#pragma once
 
 #include "nvim/buffer_defs.h"
 #include "nvim/eval/typval_defs.h"
@@ -7,4 +6,3 @@
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/buffer.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_BUFFER_H
diff --git a/src/nvim/eval/decode.h b/src/nvim/eval/decode.h
index 7455130221..3000cd3211 100644
--- a/src/nvim/eval/decode.h
+++ b/src/nvim/eval/decode.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_DECODE_H
-#define NVIM_EVAL_DECODE_H
+#pragma once
 
 #include <msgpack.h>
 #include <stddef.h>
@@ -10,4 +9,3 @@
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/decode.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_DECODE_H
diff --git a/src/nvim/eval/encode.h b/src/nvim/eval/encode.h
index b589b8b13f..a30016e724 100644
--- a/src/nvim/eval/encode.h
+++ b/src/nvim/eval/encode.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_ENCODE_H
-#define NVIM_EVAL_ENCODE_H
+#pragma once
 
 #include <msgpack.h>
 #include <msgpack/pack.h>
@@ -74,4 +73,3 @@ extern const char *const encode_special_var_names[];
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/encode.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_ENCODE_H
diff --git a/src/nvim/eval/executor.h b/src/nvim/eval/executor.h
index e8bf147245..58edf7216b 100644
--- a/src/nvim/eval/executor.h
+++ b/src/nvim/eval/executor.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_EXECUTOR_H
-#define NVIM_EVAL_EXECUTOR_H
+#pragma once
 
 #include "nvim/eval/typval_defs.h"
 
@@ -8,4 +7,3 @@ extern char *e_list_index_out_of_range_nr;
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/executor.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_EXECUTOR_H
diff --git a/src/nvim/eval/funcs.h b/src/nvim/eval/funcs.h
index 5f6132f68c..858da53e13 100644
--- a/src/nvim/eval/funcs.h
+++ b/src/nvim/eval/funcs.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_FUNCS_H
-#define NVIM_EVAL_FUNCS_H
+#pragma once
 
 #include <stdbool.h>
 #include <stdint.h>
@@ -31,4 +30,3 @@ typedef struct {
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/funcs.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_FUNCS_H
diff --git a/src/nvim/eval/gc.h b/src/nvim/eval/gc.h
index 66e959ced5..ea91952fff 100644
--- a/src/nvim/eval/gc.h
+++ b/src/nvim/eval/gc.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_GC_H
-#define NVIM_EVAL_GC_H
+#pragma once
 
 #include "nvim/eval/typval_defs.h"
 
@@ -9,4 +8,3 @@ extern list_T *gc_first_list;
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/gc.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_GC_H
diff --git a/src/nvim/eval/typval.h b/src/nvim/eval/typval.h
index d2baabb424..751b9646b3 100644
--- a/src/nvim/eval/typval.h
+++ b/src/nvim/eval/typval.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_TYPVAL_H
-#define NVIM_EVAL_TYPVAL_H
+#pragma once
 
 #include <assert.h>
 #include <stdbool.h>
@@ -492,5 +491,3 @@ EXTERN const size_t kTVTranslate INIT( = TV_TRANSLATE);
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/typval.h.generated.h"
 #endif
-
-#endif  // NVIM_EVAL_TYPVAL_H
diff --git a/src/nvim/eval/typval_defs.h b/src/nvim/eval/typval_defs.h
index c0b5416a05..996dac20bc 100644
--- a/src/nvim/eval/typval_defs.h
+++ b/src/nvim/eval/typval_defs.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_TYPVAL_DEFS_H
-#define NVIM_EVAL_TYPVAL_DEFS_H
+#pragma once
 
 #include <inttypes.h>
 #include <limits.h>
@@ -385,5 +384,3 @@ typedef struct list_stack_S {
   list_T *list;
   struct list_stack_S *prev;
 } list_stack_T;
-
-#endif  // NVIM_EVAL_TYPVAL_DEFS_H
diff --git a/src/nvim/eval/typval_encode.h b/src/nvim/eval/typval_encode.h
index cf01926030..743acd8800 100644
--- a/src/nvim/eval/typval_encode.h
+++ b/src/nvim/eval/typval_encode.h
@@ -2,8 +2,7 @@
 ///
 /// Contains common definitions for eval/typval_encode.c.h. Most of time should
 /// not be included directly.
-#ifndef NVIM_EVAL_TYPVAL_ENCODE_H
-#define NVIM_EVAL_TYPVAL_ENCODE_H
+#pragma once
 
 #include <assert.h>
 #include <inttypes.h>
@@ -140,5 +139,3 @@ static inline size_t tv_strlen(const typval_T *const tv)
 /// Name of the dummy const dict_T *const variable
 #define TYPVAL_ENCODE_NODICT_VAR \
   _TYPVAL_ENCODE_FUNC_NAME(_typval_encode_, _nodict_var)
-
-#endif  // NVIM_EVAL_TYPVAL_ENCODE_H
diff --git a/src/nvim/eval/userfunc.h b/src/nvim/eval/userfunc.h
index c3fe56d30c..7f77b55f27 100644
--- a/src/nvim/eval/userfunc.h
+++ b/src/nvim/eval/userfunc.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_USERFUNC_H
-#define NVIM_EVAL_USERFUNC_H
+#pragma once
 
 #include <stdbool.h>
 #include <stddef.h>
@@ -97,4 +96,3 @@ typedef struct {
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/userfunc.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_USERFUNC_H
diff --git a/src/nvim/eval/vars.h b/src/nvim/eval/vars.h
index 12ff5b11cb..124d73825b 100644
--- a/src/nvim/eval/vars.h
+++ b/src/nvim/eval/vars.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_VARS_H
-#define NVIM_EVAL_VARS_H
+#pragma once
 
 #include "nvim/ex_cmds_defs.h"
 #include "nvim/option_defs.h"
@@ -7,4 +6,3 @@
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/vars.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_VARS_H
diff --git a/src/nvim/eval/window.h b/src/nvim/eval/window.h
index 671c8fbf79..8502978ac1 100644
--- a/src/nvim/eval/window.h
+++ b/src/nvim/eval/window.h
@@ -1,5 +1,4 @@
-#ifndef NVIM_EVAL_WINDOW_H
-#define NVIM_EVAL_WINDOW_H
+#pragma once
 
 #include <stdbool.h>
 #include <string.h>
@@ -76,4 +75,3 @@ typedef struct {
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/window.h.generated.h"
 #endif
-#endif  // NVIM_EVAL_WINDOW_H