Fix aliasing _has_include with a custom macro

include/boost/wave/util/cpp_macromap.hpp

@@ -1394,6 +1394,8 @@ macromap<ContextT>::rescan_replacement_list(token_type const &curr_token,
         typename ContainerT::iterator begin_it = replacement_list.begin();
         typename ContainerT::iterator end_it = replacement_list.end();
 
+        // An object-like macro's replacement list does not contain the tokens
+        // following its invocation, which may complete __has_include(...).
         expand_whole_tokensequence(
             expanded, begin_it, end_it,
             expand_operator_defined, expand_operator_has_include);
@@ -1643,7 +1645,8 @@ macromap<ContextT>::expand_macro(ContainerT &expanded,
     rescan_replacement_list(
         curr_token, macro_def, replacement_list,
         expanded_list, expand_operator_defined,
-        expand_operator_has_include, first, last);
+        expand_operator_has_include && macro_def.is_functionlike,
+        first, last);
 
     ctx.get_hooks().rescanned_macro(ctx.derived(), expanded_list);
 

test/testwave/testfiles/t_2_034.cpp

@@ -0,0 +1,34 @@
+/*=============================================================================
+    Boost.Wave: A Standard compliant C++ preprocessor library
+    http://www.boost.org/
+
+    Copyright (c) 2026 Martin Medler. Distributed under the Boost
+    Software License, Version 1.0. (See accompanying file
+    LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+
+// An object like macro can be used as alias to the special macro __has_include
+
+//O --c++17
+//O -Werror
+
+// point system path to this directory
+//O -S.
+
+#define HAS_INCLUDE __has_include
+#if HAS_INCLUDE(<t_2_034.cpp>)
+#define FOUND_SELF_VIA_ALIAS
+#else
+#warning has_include could not find this file through an alias
+#endif
+
+//H 10: t_2_034.cpp(18): #define
+//H 08: t_2_034.cpp(18): HAS_INCLUDE=__has_include
+//H 10: t_2_034.cpp(19): #if
+//H 01: t_2_034.cpp(18): HAS_INCLUDE
+//H 02: __has_include
+//H 03: __has_include
+//H 11: t_2_034.cpp(19): #if HAS_INCLUDE(<t_2_034.cpp>): 1
+//H 10: t_2_034.cpp(20): #define
+//H 08: t_2_034.cpp(20): FOUND_SELF_VIA_ALIAS=
+//H 10: t_2_034.cpp(21): #else

test/testwave/testfiles/t_2_035.cpp

@@ -0,0 +1,34 @@
+/*=============================================================================
+    Boost.Wave: A Standard compliant C++ preprocessor library
+    http://www.boost.org/
+
+    Copyright (c) 2026 Martin Medler. Distributed under the Boost
+    Software License, Version 1.0. (See accompanying file
+    LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+
+// A function like macro can be used as alias to the special macro __has_include
+
+//O --c++17
+//O -Werror
+
+// point system path to this directory
+//O -S.
+
+#define HAS_INCLUDE(x) __has_include(x)
+#if HAS_INCLUDE(<t_2_035.cpp>)
+#define FOUND_SELF_VIA_ALIAS
+#else
+#warning has_include could not find this file through an alias
+#endif
+
+//H 10: t_2_035.cpp(18): #define
+//H 08: t_2_035.cpp(18): HAS_INCLUDE(x)=__has_include(x)
+//H 10: t_2_035.cpp(19): #if
+//H 00: t_2_035.cpp(19): HAS_INCLUDE(<t_2_035.cpp>), [t_2_035.cpp(18): HAS_INCLUDE(x)=__has_include(x)]
+//H 02: __has_include(<t_2_035.cpp>)
+//H 03: 1
+//H 11: t_2_035.cpp(19): #if HAS_INCLUDE(<t_2_035.cpp>): 1
+//H 10: t_2_035.cpp(20): #define
+//H 08: t_2_035.cpp(20): FOUND_SELF_VIA_ALIAS=
+//H 10: t_2_035.cpp(21): #else

test/testwave/testfiles/test.cfg

@@ -86,6 +86,8 @@ t_2_030.cpp
 t_2_031.cpp
 t_2_032.cpp
 t_2_033.cpp
+t_2_034.cpp
+t_2_035.cpp
 
 #
 # t_3: Predefined macros