From eea77d1f3437366004a5d47efdf6b9cdbf3fcfbb Mon Sep 17 00:00:00 2001 From: David Malcolm Date: Fri, 14 Jul 2017 15:09:00 +0000 Subject: [PATCH] c/c++: Add fix-it hints for suggested missing #includes gcc/c-family/ChangeLog: * c-common.c (try_to_locate_new_include_insertion_point): New function. (per_file_includes_t): New typedef. (added_includes_t): New typedef. (added_includes): New variable. (maybe_add_include_fixit): New function. * c-common.h (maybe_add_include_fixit): New decl. gcc/c/ChangeLog: * c-decl.c (implicitly_declare): When suggesting a missing #include, provide a fix-it hint. gcc/cp/ChangeLog: * name-lookup.c (get_std_name_hint): Add '<' and '>' around the header names. (maybe_suggest_missing_header): Update for addition of '<' and '>' to above. Provide a fix-it hint. * pt.c: Include "gcc-rich-location.h" (listify): Attempt to add fix-it hint for missing #include . * rtti.c: Include "gcc-rich-location.h". (typeid_ok_p): Attempt to add fix-it hint for missing #include . gcc/testsuite/ChangeLog: * g++.dg/cpp0x/missing-initializer_list-include.C: New test case. * g++.dg/lookup/missing-std-include-2.C: New test case. * g++.dg/lookup/missing-std-include-3.C: New test case. * g++.dg/rtti/missing-typeinfo-include.C: New test case. * gcc.dg/missing-header-fixit-1.c: New test case. * gcc.dg/missing-header-fixit-2.c: New test case. * gcc.dg/missing-header-fixit-2.h: New header. From-SVN: r250203 --- gcc/c-family/ChangeLog | 10 ++ gcc/c-family/c-common.c | 131 ++++++++++++++++++ gcc/c-family/c-common.h | 2 + gcc/c/ChangeLog | 5 + gcc/c/c-decl.c | 10 +- gcc/cp/ChangeLog | 13 ++ gcc/cp/name-lookup.c | 94 +++++++------ gcc/cp/pt.c | 9 +- gcc/cp/rtti.c | 8 +- gcc/testsuite/ChangeLog | 10 ++ .../cpp0x/missing-initializer_list-include.C | 28 ++++ .../g++.dg/lookup/missing-std-include-2.C | 55 ++++++++ .../g++.dg/lookup/missing-std-include-3.C | 35 +++++ .../g++.dg/rtti/missing-typeinfo-include.C | 27 ++++ gcc/testsuite/gcc.dg/missing-header-fixit-1.c | 36 +++++ gcc/testsuite/gcc.dg/missing-header-fixit-2.c | 31 +++++ gcc/testsuite/gcc.dg/missing-header-fixit-2.h | 7 + 17 files changed, 461 insertions(+), 50 deletions(-) create mode 100644 gcc/testsuite/g++.dg/cpp0x/missing-initializer_list-include.C create mode 100644 gcc/testsuite/g++.dg/lookup/missing-std-include-2.C create mode 100644 gcc/testsuite/g++.dg/lookup/missing-std-include-3.C create mode 100644 gcc/testsuite/g++.dg/rtti/missing-typeinfo-include.C create mode 100644 gcc/testsuite/gcc.dg/missing-header-fixit-1.c create mode 100644 gcc/testsuite/gcc.dg/missing-header-fixit-2.c create mode 100644 gcc/testsuite/gcc.dg/missing-header-fixit-2.h diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index b21db816b4d..cea8fc02223 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -1,3 +1,13 @@ +2017-07-14 David Malcolm + + * c-common.c (try_to_locate_new_include_insertion_point): New + function. + (per_file_includes_t): New typedef. + (added_includes_t): New typedef. + (added_includes): New variable. + (maybe_add_include_fixit): New function. + * c-common.h (maybe_add_include_fixit): New decl. + 2017-07-10 Martin Sebor PR other/81345 diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index b4217f3a2cc..feb0904bcbf 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -8019,4 +8019,135 @@ c_family_tests (void) #endif /* #if CHECKING_P */ +/* Attempt to locate a suitable location within FILE for a + #include directive to be inserted before. FILE should + be a string from libcpp (pointer equality is used). + LOC is the location of the relevant diagnostic. + + Attempt to return the location within FILE immediately + after the last #include within that file, or the start of + that file if it has no #include directives. + + Return UNKNOWN_LOCATION if no suitable location is found, + or if an error occurs. */ + +static location_t +try_to_locate_new_include_insertion_point (const char *file, location_t loc) +{ + /* Locate the last ordinary map within FILE that ended with a #include. */ + const line_map_ordinary *last_include_ord_map = NULL; + + /* ...and the next ordinary map within FILE after that one. */ + const line_map_ordinary *last_ord_map_after_include = NULL; + + /* ...and the first ordinary map within FILE. */ + const line_map_ordinary *first_ord_map_in_file = NULL; + + /* Get ordinary map containing LOC (or its expansion). */ + const line_map_ordinary *ord_map_for_loc = NULL; + loc = linemap_resolve_location (line_table, loc, LRK_MACRO_EXPANSION_POINT, + &ord_map_for_loc); + gcc_assert (ord_map_for_loc); + + for (unsigned int i = 0; i < LINEMAPS_ORDINARY_USED (line_table); i++) + { + const line_map_ordinary *ord_map + = LINEMAPS_ORDINARY_MAP_AT (line_table, i); + + const line_map_ordinary *from = INCLUDED_FROM (line_table, ord_map); + if (from) + if (from->to_file == file) + { + last_include_ord_map = from; + last_ord_map_after_include = NULL; + } + + if (ord_map->to_file == file) + { + if (!first_ord_map_in_file) + first_ord_map_in_file = ord_map; + if (last_include_ord_map && !last_ord_map_after_include) + last_ord_map_after_include = ord_map; + } + + /* Stop searching when reaching the ord_map containing LOC, + as it makes no sense to provide fix-it hints that appear + after the diagnostic in question. */ + if (ord_map == ord_map_for_loc) + break; + } + + /* Determine where to insert the #include. */ + const line_map_ordinary *ord_map_for_insertion; + + /* We want the next ordmap in the file after the last one that's a + #include, but failing that, the start of the file. */ + if (last_ord_map_after_include) + ord_map_for_insertion = last_ord_map_after_include; + else + ord_map_for_insertion = first_ord_map_in_file; + + if (!ord_map_for_insertion) + return UNKNOWN_LOCATION; + + /* The "start_location" is column 0, meaning "the whole line". + rich_location and edit_context can't cope with this, so use + column 1 instead. */ + location_t col_0 = ord_map_for_insertion->start_location; + return linemap_position_for_loc_and_offset (line_table, col_0, 1); +} + +/* A map from filenames to sets of headers added to them, for + ensuring idempotency within maybe_add_include_fixit. */ + +/* The values within the map. We need string comparison as there's + no guarantee that two different diagnostics that are recommending + adding e.g. "" are using the same buffer. */ + +typedef hash_set per_file_includes_t; + +/* The map itself. We don't need string comparison for the filename keys, + as they come from libcpp. */ + +typedef hash_map added_includes_t; +static added_includes_t *added_includes; + +/* Attempt to add a fix-it hint to RICHLOC, adding "#include HEADER\n" + in a suitable location within the file of RICHLOC's primary + location. + + This function is idempotent: a header will be added at most once to + any given file. */ + +void +maybe_add_include_fixit (rich_location *richloc, const char *header) +{ + location_t loc = richloc->get_loc (); + const char *file = LOCATION_FILE (loc); + if (!file) + return; + + /* Idempotency: don't add the same header more than once to a given file. */ + if (!added_includes) + added_includes = new added_includes_t (); + per_file_includes_t *&set = added_includes->get_or_insert (file); + if (set) + if (set->contains (header)) + /* ...then we've already added HEADER to that file. */ + return; + if (!set) + set = new per_file_includes_t (); + set->add (header); + + /* Attempt to locate a suitable place for the new directive. */ + location_t include_insert_loc + = try_to_locate_new_include_insertion_point (file, loc); + if (include_insert_loc == UNKNOWN_LOCATION) + return; + + char *text = xasprintf ("#include %s\n", header); + richloc->add_fixit_insert_before (include_insert_loc, text); + free (text); +} + #include "gt-c-family-c-common.h" diff --git a/gcc/c-family/c-common.h b/gcc/c-family/c-common.h index 7e7efb2916e..a29f1ade25d 100644 --- a/gcc/c-family/c-common.h +++ b/gcc/c-family/c-common.h @@ -1556,6 +1556,8 @@ excess_precision_mode_join (enum flt_eval_method, enum flt_eval_method); extern int c_flt_eval_method (bool ts18661_p); extern void add_no_sanitize_value (tree node, unsigned int flags); +extern void maybe_add_include_fixit (rich_location *, const char *); + #if CHECKING_P namespace selftest { /* Declarations for specific families of tests within c-family, diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog index aba08689638..42ef9a5dfb6 100644 --- a/gcc/c/ChangeLog +++ b/gcc/c/ChangeLog @@ -1,3 +1,8 @@ +2017-07-14 David Malcolm + + * c-decl.c (implicitly_declare): When suggesting a missing + #include, provide a fix-it hint. + 2017-07-06 David Malcolm * c-lang.c (selftest::run_c_tests): Move body to c_family_tests, diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c index 317d5cdd099..50da185e363 100644 --- a/gcc/c/c-decl.c +++ b/gcc/c/c-decl.c @@ -3386,8 +3386,14 @@ implicitly_declare (location_t loc, tree functionid) const char *header = header_for_builtin_fn (DECL_FUNCTION_CODE (decl)); if (header != NULL && warned) - inform (loc, "include %qs or provide a declaration of %qD", - header, decl); + { + rich_location richloc (line_table, loc); + maybe_add_include_fixit (&richloc, header); + inform_at_rich_loc + (&richloc, + "include %qs or provide a declaration of %qD", + header, decl); + } newtype = TREE_TYPE (decl); } } diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog index 02214c9953b..715ac76c8c4 100644 --- a/gcc/cp/ChangeLog +++ b/gcc/cp/ChangeLog @@ -1,3 +1,16 @@ +2017-07-14 David Malcolm + + * name-lookup.c (get_std_name_hint): Add '<' and '>' around + the header names. + (maybe_suggest_missing_header): Update for addition of '<' and '>' + to above. Provide a fix-it hint. + * pt.c: Include "gcc-rich-location.h" + (listify): Attempt to add fix-it hint for missing + #include . + * rtti.c: Include "gcc-rich-location.h". + (typeid_ok_p): Attempt to add fix-it hint for missing + #include . + 2017-07-12 Jason Merrill P0512R0 - Deduction from an initializer list. diff --git a/gcc/cp/name-lookup.c b/gcc/cp/name-lookup.c index fcf06e0cf5b..cd7428a4ea4 100644 --- a/gcc/cp/name-lookup.c +++ b/gcc/cp/name-lookup.c @@ -4760,7 +4760,7 @@ suggest_alternatives_for (location_t location, tree name, /* Subroutine of maybe_suggest_missing_header for handling unrecognized names for some of the most common names within "std::". Given non-NULL NAME, a name for lookup within "std::", return the header - name defining it within the C++ Standard Library (without '<' and '>'), + name defining it within the C++ Standard Library (with '<' and '>'), or NULL. */ static const char * @@ -4773,61 +4773,61 @@ get_std_name_hint (const char *name) }; static const std_name_hint hints[] = { /* . */ - {"array", "array"}, // C++11 + {"array", ""}, // C++11 /* . */ - {"deque", "deque"}, + {"deque", ""}, /* . */ - {"forward_list", "forward_list"}, // C++11 + {"forward_list", ""}, // C++11 /* . */ - {"basic_filebuf", "fstream"}, - {"basic_ifstream", "fstream"}, - {"basic_ofstream", "fstream"}, - {"basic_fstream", "fstream"}, + {"basic_filebuf", ""}, + {"basic_ifstream", ""}, + {"basic_ofstream", ""}, + {"basic_fstream", ""}, /* . */ - {"cin", "iostream"}, - {"cout", "iostream"}, - {"cerr", "iostream"}, - {"clog", "iostream"}, - {"wcin", "iostream"}, - {"wcout", "iostream"}, - {"wclog", "iostream"}, + {"cin", ""}, + {"cout", ""}, + {"cerr", ""}, + {"clog", ""}, + {"wcin", ""}, + {"wcout", ""}, + {"wclog", ""}, /* . */ - {"list", "list"}, + {"list", ""}, /* . */ - {"map", "map"}, - {"multimap", "map"}, + {"map", ""}, + {"multimap", ""}, /* . */ - {"queue", "queue"}, - {"priority_queue", "queue"}, + {"queue", ""}, + {"priority_queue", ""}, /* . */ - {"ostream", "ostream"}, - {"wostream", "ostream"}, - {"ends", "ostream"}, - {"flush", "ostream"}, - {"endl", "ostream"}, + {"ostream", ""}, + {"wostream", ""}, + {"ends", ""}, + {"flush", ""}, + {"endl", ""}, /* . */ - {"set", "set"}, - {"multiset", "set"}, + {"set", ""}, + {"multiset", ""}, /* . */ - {"basic_stringbuf", "sstream"}, - {"basic_istringstream", "sstream"}, - {"basic_ostringstream", "sstream"}, - {"basic_stringstream", "sstream"}, + {"basic_stringbuf", ""}, + {"basic_istringstream", ""}, + {"basic_ostringstream", ""}, + {"basic_stringstream", ""}, /* . */ - {"stack", "stack"}, + {"stack", ""}, /* . */ - {"string", "string"}, - {"wstring", "string"}, - {"u16string", "string"}, - {"u32string", "string"}, + {"string", ""}, + {"wstring", ""}, + {"u16string", ""}, + {"u32string", ""}, /* . */ - {"unordered_map", "unordered_map"}, // C++11 - {"unordered_multimap", "unordered_map"}, // C++11 + {"unordered_map", ""}, // C++11 + {"unordered_multimap", ""}, // C++11 /* . */ - {"unordered_set", "unordered_set"}, // C++11 - {"unordered_multiset", "unordered_set"}, // C++11 + {"unordered_set", ""}, // C++11 + {"unordered_multiset", ""}, // C++11 /* . */ - {"vector", "vector"}, + {"vector", ""}, }; const size_t num_hints = sizeof (hints) / sizeof (hints[0]); for (size_t i = 0; i < num_hints; i++) @@ -4858,10 +4858,14 @@ maybe_suggest_missing_header (location_t location, tree name, tree scope) const char *name_str = IDENTIFIER_POINTER (name); const char *header_hint = get_std_name_hint (name_str); if (header_hint) - inform (location, - "% is defined in header %<<%s>%>;" - " did you forget to %<#include <%s>%>?", - name_str, header_hint, header_hint); + { + gcc_rich_location richloc (location); + maybe_add_include_fixit (&richloc, header_hint); + inform_at_rich_loc (&richloc, + "% is defined in header %qs;" + " did you forget to %<#include %s%>?", + name_str, header_hint, header_hint); + } } /* Look for alternatives for NAME, an IDENTIFIER_NODE for which name diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c index 0df6854f648..da133bd1863 100644 --- a/gcc/cp/pt.c +++ b/gcc/cp/pt.c @@ -40,6 +40,7 @@ along with GCC; see the file COPYING3. If not see #include "tree-iterator.h" #include "type-utils.h" #include "gimplify.h" +#include "gcc-rich-location.h" /* The type of functions taking a tree, and some additional data, and returning an int. */ @@ -24867,8 +24868,12 @@ listify (tree arg) if (!std_init_list || !DECL_CLASS_TEMPLATE_P (std_init_list)) { - error ("deducing from brace-enclosed initializer list requires " - "#include "); + gcc_rich_location richloc (input_location); + maybe_add_include_fixit (&richloc, ""); + error_at_rich_loc (&richloc, + "deducing from brace-enclosed initializer list" + " requires #include "); + return error_mark_node; } tree argvec = make_tree_vec (1); diff --git a/gcc/cp/rtti.c b/gcc/cp/rtti.c index d73b1bcfa97..a660cdd9413 100644 --- a/gcc/cp/rtti.c +++ b/gcc/cp/rtti.c @@ -29,6 +29,7 @@ along with GCC; see the file COPYING3. If not see #include "intl.h" #include "stor-layout.h" #include "c-family/c-pragma.h" +#include "gcc-rich-location.h" /* C++ returns type information to the user in struct type_info objects. We also use type information to implement dynamic_cast and @@ -316,7 +317,12 @@ typeid_ok_p (void) if (!COMPLETE_TYPE_P (const_type_info_type_node)) { - error ("must %<#include %> before using %"); + gcc_rich_location richloc (input_location); + maybe_add_include_fixit (&richloc, ""); + error_at_rich_loc (&richloc, + "must %<#include %> before using" + " %"); + return false; } diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 41dca744045..4bdeeca3213 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,13 @@ +2017-07-14 David Malcolm + + * g++.dg/cpp0x/missing-initializer_list-include.C: New test case. + * g++.dg/lookup/missing-std-include-2.C: New test case. + * g++.dg/lookup/missing-std-include-3.C: New test case. + * g++.dg/rtti/missing-typeinfo-include.C: New test case. + * gcc.dg/missing-header-fixit-1.c: New test case. + * gcc.dg/missing-header-fixit-2.c: New test case. + * gcc.dg/missing-header-fixit-2.h: New header. + 2017-07-13 David Malcolm PR c/81405 diff --git a/gcc/testsuite/g++.dg/cpp0x/missing-initializer_list-include.C b/gcc/testsuite/g++.dg/cpp0x/missing-initializer_list-include.C new file mode 100644 index 00000000000..8e803c82f24 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/missing-initializer_list-include.C @@ -0,0 +1,28 @@ +/* This is padding (to avoid the generated patch containing DejaGnu + directives). */ + +/* { dg-options "-fdiagnostics-generate-patch" } */ + +// { dg-do compile { target c++11 } } + +void test (int i) +{ + auto a = { &i }; // { dg-error "deducing from brace-enclosed initializer list requires #include " } +} + +/* Verify the output from -fdiagnostics-generate-patch. + We expect the patch to begin with a header, containing this + source filename, via an absolute path. + Given the path, we can only capture it via regexps. */ +/* { dg-regexp "\\-\\-\\- .*" } */ +/* { dg-regexp "\\+\\+\\+ .*" } */ +/* Use #if 0/#endif rather than comments, to allow the text to contain + a comment. */ +#if 0 +{ dg-begin-multiline-output "" } +@@ -1,3 +1,4 @@ ++#include + /* This is padding (to avoid the generated patch containing DejaGnu + directives). */ +{ dg-end-multiline-output "" } +#endif diff --git a/gcc/testsuite/g++.dg/lookup/missing-std-include-2.C b/gcc/testsuite/g++.dg/lookup/missing-std-include-2.C new file mode 100644 index 00000000000..ae918f869a7 --- /dev/null +++ b/gcc/testsuite/g++.dg/lookup/missing-std-include-2.C @@ -0,0 +1,55 @@ +/* Example of fix-it hints that add #include directives, + adding them after a pre-existing #include. */ + +/* { dg-options "-fdiagnostics-generate-patch" } */ + +/* This is padding (to avoid the generated patch containing DejaGnu + directives). */ + +#include + +void test (void) +{ + std::string s ("hello world"); // { dg-error ".string. is not a member of .std." } + // { dg-message ".std::string. is defined in header ..; did you forget to .#include .?" "" { target *-*-* } .-1 } + + std::cout << 10; // { dg-error ".cout. is not a member of .std." } + // { dg-message ".std::cout. is defined in header ..; did you forget to .#include .?" "" { target *-*-* } .-1 } +} + +/* Same again, to test idempotency of the added "#include" fix-it. */ + +void test_2 (void) +{ + std::string s ("hello again"); // { dg-error ".string. is not a member of .std." } + // { dg-message ".std::string. is defined in header ..; did you forget to .#include .?" "" { target *-*-* } .-1 } + + std::cout << 10; // { dg-error ".cout. is not a member of .std." } + // { dg-message ".std::cout. is defined in header ..; did you forget to .#include .?" "" { target *-*-* } .-1 } +} + +/* Verify the output from -fdiagnostics-generate-patch. + We expect the patch to begin with a header, containing this + source filename, via an absolute path. + Given the path, we can only capture it via regexps. */ +/* { dg-regexp "\\-\\-\\- .*" } */ +/* { dg-regexp "\\+\\+\\+ .*" } */ + +/* Verify the hunks within the patch. + Use #if 0/#endif rather than comments, to allow the text to contain + a comment. + We expect a "#include " and "#include " to each have been + added once, immediately below the last #include. */ +#if 0 +{ dg-begin-multiline-output "" } +@@ -7,6 +7,8 @@ + directives). */ + + #include ++#include ++#include + + void test (void) + { +{ dg-end-multiline-output "" } +#endif diff --git a/gcc/testsuite/g++.dg/lookup/missing-std-include-3.C b/gcc/testsuite/g++.dg/lookup/missing-std-include-3.C new file mode 100644 index 00000000000..23f868dff09 --- /dev/null +++ b/gcc/testsuite/g++.dg/lookup/missing-std-include-3.C @@ -0,0 +1,35 @@ +/* Example of where the error occurs before the first #include, + which in this case happens to be the missing header. + For this case, expect to insert the #include at the top of the file. */ + +/* { dg-options "-fdiagnostics-generate-patch" } */ + +void test () +{ + std::string test; // { dg-error ".string. is not a member of .std." } + // { dg-message ".std::string. is defined in header ..; did you forget to .#include .?" "" { target *-*-* } .-1 } +} + +#include + +/* Verify the output from -fdiagnostics-generate-patch. + We expect the patch to begin with a header, containing this + source filename, via an absolute path. + Given the path, we can only capture it via regexps. */ +/* { dg-regexp "\\-\\-\\- .*" } */ +/* { dg-regexp "\\+\\+\\+ .*" } */ + +/* Verify the hunks within the patch. + Use #if 0/#endif rather than comments, to allow the text to contain + a comment. + We expect a "#include " have been added once, at the top + of the file. */ +#if 0 +{ dg-begin-multiline-output "" } +@@ -1,3 +1,4 @@ ++#include + /* Example of where the error occurs before the first #include, + which in this case happens to be the missing header. + For this case, expect to insert the #include at the top of the file. */ +{ dg-end-multiline-output "" } +#endif diff --git a/gcc/testsuite/g++.dg/rtti/missing-typeinfo-include.C b/gcc/testsuite/g++.dg/rtti/missing-typeinfo-include.C new file mode 100644 index 00000000000..937c38f11a2 --- /dev/null +++ b/gcc/testsuite/g++.dg/rtti/missing-typeinfo-include.C @@ -0,0 +1,27 @@ +/* This is padding (to avoid the generated patch containing DejaGnu + directives). */ + +/* { dg-options "-fdiagnostics-generate-patch" } */ + +void test() +{ + typeid(void); // { dg-error "must '#include ' before using 'typeid'" } +} + +/* Verify the output from -fdiagnostics-generate-patch. + We expect the patch to begin with a header, containing this + source filename, via an absolute path. + Given the path, we can only capture it via regexps. */ +/* { dg-regexp "\\-\\-\\- .*" } */ +/* { dg-regexp "\\+\\+\\+ .*" } */ +/* Use #if 0/#endif rather than comments, to allow the text to contain + a comment. */ +#if 0 +{ dg-begin-multiline-output "" } +@@ -1,3 +1,4 @@ ++#include + /* This is padding (to avoid the generated patch containing DejaGnu + directives). */ + +{ dg-end-multiline-output "" } +#endif diff --git a/gcc/testsuite/gcc.dg/missing-header-fixit-1.c b/gcc/testsuite/gcc.dg/missing-header-fixit-1.c new file mode 100644 index 00000000000..2b28357e1db --- /dev/null +++ b/gcc/testsuite/gcc.dg/missing-header-fixit-1.c @@ -0,0 +1,36 @@ +/* Example of a fix-it hint that adds a #include directive, + adding them to the top of the file, given that there is no + pre-existing #include. */ + +/* This is padding (to avoid the generated patch containing DejaGnu + directives). */ + +/* { dg-options "-fdiagnostics-generate-patch" } */ + +void test (int i, int j) +{ + printf ("%i of %i\n", i, j); /* { dg-warning "implicit declaration" } */ + /* { dg-message "include '' or provide a declaration of 'printf'" "" { target *-*-* } .-1 } */ +} + +/* Verify the output from -fdiagnostics-generate-patch. + We expect the patch to begin with a header, containing this + source filename, via an absolute path. + Given the path, we can only capture it via regexps. */ +/* { dg-regexp "\\-\\-\\- .*" } */ +/* { dg-regexp "\\+\\+\\+ .*" } */ +/* Use #if 0/#endif rather than comments, to allow the text to contain + a comment. */ +#if 0 +{ dg-begin-multiline-output "" } +@@ -1,3 +1,4 @@ ++#include + /* Example of a fix-it hint that adds a #include directive, + adding them to the top of the file, given that there is no + pre-existing #include. */ +{ dg-end-multiline-output "" } +#endif + +/* FIXME: should we attempt to skip leading comments when determining the + insertion location? + Similarly, should we attempt to be within single-inclusion guards, etc? */ diff --git a/gcc/testsuite/gcc.dg/missing-header-fixit-2.c b/gcc/testsuite/gcc.dg/missing-header-fixit-2.c new file mode 100644 index 00000000000..5d5f87488f5 --- /dev/null +++ b/gcc/testsuite/gcc.dg/missing-header-fixit-2.c @@ -0,0 +1,31 @@ +/* Verify that when we suggest adding #include directives that they + are added to the affected file. */ + +/* The following header file is missing a "#include ". */ + +#include "missing-header-fixit-2.h" + +/* These directives actually apply to the header. */ +/* { dg-warning "implicit declaration of function 'printf'" "" { target *-*-* } 6 } */ +/* { dg-warning "incompatible implicit declaration of built-in function 'printf'" "" { target *-*-* } 6 } */ + +/* { dg-options "-fdiagnostics-generate-patch" } */ + +/* Verify the output from -fdiagnostics-generate-patch. + We expect the patch to begin with a header, containing the + filename of the header, via an absolute path. + Given the path, we can only capture it via regexps. */ +/* { dg-regexp "\\-\\-\\- .*" } */ +/* { dg-regexp "\\+\\+\\+ .*" } */ +/* Use #if 0/#endif rather than comments, to allow the text to contain + a comment. + We expect the *header* to have been patched, adding the missing include. */ +#if 0 +{ dg-begin-multiline-output "" } +@@ -1,3 +1,4 @@ ++#include + /* This is missing-header-fixit-2.h, for use by + missing-header-fixit-2.c */ + +{ dg-end-multiline-output "" } +#endif diff --git a/gcc/testsuite/gcc.dg/missing-header-fixit-2.h b/gcc/testsuite/gcc.dg/missing-header-fixit-2.h new file mode 100644 index 00000000000..c0bf55dcbe6 --- /dev/null +++ b/gcc/testsuite/gcc.dg/missing-header-fixit-2.h @@ -0,0 +1,7 @@ +/* This is missing-header-fixit-2.h, for use by + missing-header-fixit-2.c */ + +void test (int i, int j) +{ + printf ("%i of %i\n", i, j); +} -- 2.30.2