1// RUN: %check_clang_tidy -std=c++23 %s modernize-use-std-print %t -- \
2// RUN: -config="{CheckOptions: \
3// RUN: { \
4// RUN: modernize-use-std-print.PrintfLikeFunctions: 'unqualified_printf;::myprintf; mynamespace::myprintf2; bad_format_type_printf; fmt::printf', \
5// RUN: modernize-use-std-print.FprintfLikeFunctions: '::myfprintf; mynamespace::myfprintf2; bad_format_type_fprintf; fmt::fprintf' \
6// RUN: } \
7// RUN: }" \
8// RUN: -- -isystem %clang_tidy_headers
9
10#include <cstdio>
11#include <string>
12
13int myprintf(const char *, ...);
14int myfprintf(FILE *fp, const char *, ...);
15
16namespace mynamespace {
17int myprintf2(const char *, ...);
18int myfprintf2(FILE *fp, const char *, ...);
19}
20
21void printf_simple() {
22 myprintf("Hello %s %d", "world", 42);
23 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::print' instead of 'myprintf' [modernize-use-std-print]
24 // CHECK-FIXES: std::print("Hello {} {}", "world", 42);
25}
26
27void printf_newline() {
28 myprintf("Hello %s %d\n", "world", 42);
29 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'myprintf' [modernize-use-std-print]
30 // CHECK-FIXES: std::println("Hello {} {}", "world", 42);
31
32 mynamespace::myprintf2("Hello %s %d\n", "world", 42);
33 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'myprintf2' [modernize-use-std-print]
34 // CHECK-FIXES: std::println("Hello {} {}", "world", 42);
35
36 using mynamespace::myprintf2;
37 myprintf2("Hello %s %d\n", "world", 42);
38 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'myprintf2' [modernize-use-std-print]
39 // CHECK-FIXES: std::println("Hello {} {}", "world", 42);
40
41 // When using custom options leave printf alone
42 printf(format: "Hello %s %d\n", "world", 42);
43}
44
45int printf_uses_return_value(int i) {
46 return myprintf("return value %d\n", i);
47 // CHECK-MESSAGES-NOT: [[@LINE-1]]:10: warning: use 'std::println' instead of 'myprintf' [modernize-use-std-print]
48 // CHECK-FIXES-NOT: std::println("return value {}", i);
49}
50
51void fprintf_simple(FILE *fp)
52{
53 myfprintf(stderr, "Hello %s %d", "world", 42);
54 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::print' instead of 'myfprintf' [modernize-use-std-print]
55 // CHECK-FIXES: std::print(stderr, "Hello {} {}", "world", 42);
56}
57
58void fprintf_newline(FILE *fp)
59{
60 myfprintf(stderr, "Hello %s %d\n", "world", 42);
61 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'myfprintf' [modernize-use-std-print]
62 // CHECK-FIXES: std::println(stderr, "Hello {} {}", "world", 42);
63
64 mynamespace::myfprintf2(stderr, "Hello %s %d\n", "world", 42);
65 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'myfprintf2' [modernize-use-std-print]
66 // CHECK-FIXES: std::println(stderr, "Hello {} {}", "world", 42);
67
68 using mynamespace::myfprintf2;
69 myfprintf2(stderr, "Hello %s %d\n", "world", 42);
70 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'myfprintf2' [modernize-use-std-print]
71 // CHECK-FIXES: std::println(stderr, "Hello {} {}", "world", 42);
72
73 // When using custom options leave fprintf alone
74 fprintf(stderr, format: "Hello %s %d\n", "world", 42);
75}
76
77int fprintf_uses_return_value(int i) {
78 return myfprintf(stderr, "return value %d\n", i);
79 // CHECK-MESSAGES-NOT: [[@LINE-1]]:10: warning: use 'std::println' instead of 'myprintf' [modernize-use-std-print]
80 // CHECK-FIXES-NOT: std::println(stderr, "return value {}", i);
81}
82
83// Ensure that MatchesAnyListedNameMatcher::NameMatcher::match() can cope with a
84// NamedDecl that has no name when we're trying to match unqualified_printf.
85void no_name(const std::string &in)
86{
87 "A" + in;
88}
89
90int myprintf(const wchar_t *, ...);
91
92void wide_string_not_supported() {
93 myprintf(L"wide string %s", L"string");
94}
95
96// Issue #92896: Ensure that the check doesn't assert if the argument is
97// promoted to something that isn't a string.
98struct S {
99 S(...) {}
100};
101int bad_format_type_printf(const S &, ...);
102int bad_format_type_fprintf(FILE *, const S &, ...);
103
104void unsupported_format_parameter_type()
105{
106 // No fixes here because the format parameter of the function called is not a
107 // string.
108 bad_format_type_printf("Hello %s", "world");
109// CHECK-MESSAGES: [[@LINE-1]]:3: warning: unable to use 'std::print' instead of 'bad_format_type_printf' because first argument is not a narrow string literal [modernize-use-std-print]
110
111 bad_format_type_fprintf(stderr, "Hello %s", "world");
112// CHECK-MESSAGES: [[@LINE-1]]:3: warning: unable to use 'std::print' instead of 'bad_format_type_fprintf' because first argument is not a narrow string literal [modernize-use-std-print]
113}
114
115namespace fmt {
116 template <typename S, typename... T>
117 inline int printf(const S& fmt, const T&... args);
118
119 template <typename S, typename... T>
120 inline int fprintf(std::FILE* f, const S& fmt, const T&... args);
121}
122
123void fmt_printf()
124{
125 fmt::printf(fmt: "fmt::printf templated %s argument %d\n", args: "format", args: 424);
126 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'printf' [modernize-use-std-print]
127 // CHECK-FIXES: std::println("fmt::printf templated {} argument {}", "format", 424);
128
129 fmt::fprintf(stderr, fmt: "fmt::fprintf templated %s argument %d\n", args: "format", args: 425);
130 // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'fprintf' [modernize-use-std-print]
131 // CHECK-FIXES: std::println(stderr, "fmt::fprintf templated {} argument {}", "format", 425);
132}
133

source code of clang-tools-extra/test/clang-tidy/checkers/modernize/use-std-print-custom.cpp