| // Copyright 2010 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // This file contains tests for the printf checker. |
| |
| package a |
| |
| import ( |
| "fmt" |
| logpkg "log" // renamed to make it harder to see |
| "math" |
| "os" |
| "testing" |
| "unsafe" // just for test case printing unsafe.Pointer |
| |
| // For testing printf-like functions from external package. |
| // "github.com/foobar/externalprintf" |
| "b" |
| ) |
| |
| func UnsafePointerPrintfTest() { |
| var up unsafe.Pointer |
| fmt.Printf("%p, %x %X", up, up, up) |
| } |
| |
| // Error methods that do not satisfy the Error interface and should be checked. |
| type errorTest1 int |
| |
| func (errorTest1) Error(...interface{}) string { |
| return "hi" |
| } |
| |
| type errorTest2 int // Analogous to testing's *T type. |
| func (errorTest2) Error(...interface{}) { |
| } |
| |
| type errorTest3 int |
| |
| func (errorTest3) Error() { // No return value. |
| } |
| |
| type errorTest4 int |
| |
| func (errorTest4) Error() int { // Different return type. |
| return 3 |
| } |
| |
| type errorTest5 int |
| |
| func (errorTest5) error() { // niladic; don't complain if no args (was bug) |
| } |
| |
| // This function never executes, but it serves as a simple test for the program. |
| // Test with make test. |
| func PrintfTests() { |
| var b bool |
| var i int |
| var r rune |
| var s string |
| var x float64 |
| var p *int |
| var imap map[int]int |
| var fslice []float64 |
| var c complex64 |
| var err error |
| // Some good format/argtypes |
| fmt.Printf("") |
| fmt.Printf("%b %b %b", 3, i, x) |
| fmt.Printf("%c %c %c %c", 3, i, 'x', r) |
| fmt.Printf("%d %d %d", 3, i, imap) |
| fmt.Printf("%e %e %e %e", 3e9, x, fslice, c) |
| fmt.Printf("%E %E %E %E", 3e9, x, fslice, c) |
| fmt.Printf("%f %f %f %f", 3e9, x, fslice, c) |
| fmt.Printf("%F %F %F %F", 3e9, x, fslice, c) |
| fmt.Printf("%g %g %g %g", 3e9, x, fslice, c) |
| fmt.Printf("%G %G %G %G", 3e9, x, fslice, c) |
| fmt.Printf("%b %b %b %b", 3e9, x, fslice, c) |
| fmt.Printf("%o %o", 3, i) |
| fmt.Printf("%O %O", 3, i) |
| fmt.Printf("%p", p) |
| fmt.Printf("%q %q %q %q", 3, i, 'x', r) |
| fmt.Printf("%s %s %s", "hi", s, []byte{65}) |
| fmt.Printf("%t %t", true, b) |
| fmt.Printf("%T %T", 3, i) |
| fmt.Printf("%U %U", 3, i) |
| fmt.Printf("%v %v", 3, i) |
| fmt.Printf("%x %x %x %x %x %x %x", 3, i, "hi", s, x, c, fslice) |
| fmt.Printf("%X %X %X %X %X %X %X", 3, i, "hi", s, x, c, fslice) |
| fmt.Printf("%.*s %d %g", 3, "hi", 23, 2.3) |
| fmt.Printf("%s", &stringerv) |
| fmt.Printf("%v", &stringerv) |
| fmt.Printf("%T", &stringerv) |
| fmt.Printf("%s", &embeddedStringerv) |
| fmt.Printf("%v", &embeddedStringerv) |
| fmt.Printf("%T", &embeddedStringerv) |
| fmt.Printf("%v", notstringerv) |
| fmt.Printf("%T", notstringerv) |
| fmt.Printf("%q", stringerarrayv) |
| fmt.Printf("%v", stringerarrayv) |
| fmt.Printf("%s", stringerarrayv) |
| fmt.Printf("%v", notstringerarrayv) |
| fmt.Printf("%T", notstringerarrayv) |
| fmt.Printf("%d", new(fmt.Formatter)) |
| fmt.Printf("%*%", 2) // Ridiculous but allowed. |
| fmt.Printf("%s", interface{}(nil)) // Nothing useful we can say. |
| fmt.Printf("%a", interface{}(new(BoolFormatter))) // Could be a fmt.Formatter. |
| |
| fmt.Printf("%g", 1+2i) |
| fmt.Printf("%#e %#E %#f %#F %#g %#G", 1.2, 1.2, 1.2, 1.2, 1.2, 1.2) // OK since Go 1.9 |
| // Some bad format/argTypes |
| fmt.Printf("%b", "hi") // want "fmt.Printf format %b has arg \x22hi\x22 of wrong type string" |
| fmt.Printf("%t", c) // want "fmt.Printf format %t has arg c of wrong type complex64" |
| fmt.Printf("%t", 1+2i) // want `fmt.Printf format %t has arg 1 \+ 2i of wrong type complex128` |
| fmt.Printf("%c", 2.3) // want "fmt.Printf format %c has arg 2.3 of wrong type float64" |
| fmt.Printf("%d", 2.3) // want "fmt.Printf format %d has arg 2.3 of wrong type float64" |
| fmt.Printf("%e", "hi") // want `fmt.Printf format %e has arg "hi" of wrong type string` |
| fmt.Printf("%E", true) // want "fmt.Printf format %E has arg true of wrong type bool" |
| fmt.Printf("%f", "hi") // want "fmt.Printf format %f has arg \x22hi\x22 of wrong type string" |
| fmt.Printf("%F", 'x') // want "fmt.Printf format %F has arg 'x' of wrong type rune" |
| fmt.Printf("%g", "hi") // want `fmt.Printf format %g has arg "hi" of wrong type string` |
| fmt.Printf("%g", imap) // want `fmt.Printf format %g has arg imap of wrong type map\[int\]int` |
| fmt.Printf("%G", i) // want "fmt.Printf format %G has arg i of wrong type int" |
| fmt.Printf("%o", x) // want "fmt.Printf format %o has arg x of wrong type float64" |
| fmt.Printf("%O", x) // want "fmt.Printf format %O has arg x of wrong type float64" |
| fmt.Printf("%p", nil) // want "fmt.Printf format %p has arg nil of wrong type untyped nil" |
| fmt.Printf("%p", 23) // want "fmt.Printf format %p has arg 23 of wrong type int" |
| fmt.Printf("%q", x) // want "fmt.Printf format %q has arg x of wrong type float64" |
| fmt.Printf("%s", b) // want "fmt.Printf format %s has arg b of wrong type bool" |
| fmt.Printf("%s", byte(65)) // want `fmt.Printf format %s has arg byte\(65\) of wrong type byte` |
| fmt.Printf("%t", 23) // want "fmt.Printf format %t has arg 23 of wrong type int" |
| fmt.Printf("%U", x) // want "fmt.Printf format %U has arg x of wrong type float64" |
| fmt.Printf("%x", nil) // want "fmt.Printf format %x has arg nil of wrong type untyped nil" |
| fmt.Printf("%s", stringerv) // want "fmt.Printf format %s has arg stringerv of wrong type a.ptrStringer" |
| fmt.Printf("%t", stringerv) // want "fmt.Printf format %t has arg stringerv of wrong type a.ptrStringer" |
| fmt.Printf("%s", embeddedStringerv) // want "fmt.Printf format %s has arg embeddedStringerv of wrong type a.embeddedStringer" |
| fmt.Printf("%t", embeddedStringerv) // want "fmt.Printf format %t has arg embeddedStringerv of wrong type a.embeddedStringer" |
| fmt.Printf("%q", notstringerv) // want "fmt.Printf format %q has arg notstringerv of wrong type a.notstringer" |
| fmt.Printf("%t", notstringerv) // want "fmt.Printf format %t has arg notstringerv of wrong type a.notstringer" |
| fmt.Printf("%t", stringerarrayv) // want "fmt.Printf format %t has arg stringerarrayv of wrong type a.stringerarray" |
| fmt.Printf("%t", notstringerarrayv) // want "fmt.Printf format %t has arg notstringerarrayv of wrong type a.notstringerarray" |
| fmt.Printf("%q", notstringerarrayv) // want "fmt.Printf format %q has arg notstringerarrayv of wrong type a.notstringerarray" |
| fmt.Printf("%d", BoolFormatter(true)) // want `fmt.Printf format %d has arg BoolFormatter\(true\) of wrong type a.BoolFormatter` |
| fmt.Printf("%z", FormatterVal(true)) // correct (the type is responsible for formatting) |
| fmt.Printf("%d", FormatterVal(true)) // correct (the type is responsible for formatting) |
| fmt.Printf("%s", nonemptyinterface) // correct (the type is responsible for formatting) |
| fmt.Printf("%.*s %d %6g", 3, "hi", 23, 'x') // want "fmt.Printf format %6g has arg 'x' of wrong type rune" |
| fmt.Println() // not an error |
| fmt.Println("%s", "hi") // want "fmt.Println call has possible formatting directive %s" |
| fmt.Println("%v", "hi") // want "fmt.Println call has possible formatting directive %v" |
| fmt.Println("%T", "hi") // want "fmt.Println call has possible formatting directive %T" |
| fmt.Println("0.0%") // correct (trailing % couldn't be a formatting directive) |
| fmt.Printf("%s", "hi", 3) // want "fmt.Printf call needs 1 arg but has 2 args" |
| _ = fmt.Sprintf("%"+("s"), "hi", 3) // want "fmt.Sprintf call needs 1 arg but has 2 args" |
| fmt.Printf("%s%%%d", "hi", 3) // correct |
| fmt.Printf("%08s", "woo") // correct |
| fmt.Printf("% 8s", "woo") // correct |
| fmt.Printf("%.*d", 3, 3) // correct |
| fmt.Printf("%.*d x", 3, 3, 3, 3) // want "fmt.Printf call needs 2 args but has 4 args" |
| fmt.Printf("%.*d x", "hi", 3) // want `fmt.Printf format %.*d uses non-int "hi" as argument of \*` |
| fmt.Printf("%.*d x", i, 3) // correct |
| fmt.Printf("%.*d x", s, 3) // want `fmt.Printf format %.\*d uses non-int s as argument of \*` |
| fmt.Printf("%*% x", 0.22) // want `fmt.Printf format %\*% uses non-int 0.22 as argument of \*` |
| fmt.Printf("%q %q", multi()...) // ok |
| fmt.Printf("%#q", `blah`) // ok |
| fmt.Printf("%#b", 3) // ok |
| // printf("now is the time", "buddy") // no error "a.printf call has arguments but no formatting directives" |
| Printf("now is the time", "buddy") // want "a.Printf call has arguments but no formatting directives" |
| Printf("hi") // ok |
| const format = "%s %s\n" |
| Printf(format, "hi", "there") |
| Printf(format, "hi") // want "a.Printf format %s reads arg #2, but call has 1 arg$" |
| Printf("%s %d %.3v %q", "str", 4) // want "a.Printf format %.3v reads arg #3, but call has 2 args" |
| f := new(ptrStringer) |
| f.Warn(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Warn call has possible formatting directive %s` |
| f.Warnf(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Warnf call needs 1 arg but has 2 args` |
| f.Warnf(0, "%r", "hello") // want `\(\*a.ptrStringer\).Warnf format %r has unknown verb r` |
| f.Warnf(0, "%#s", "hello") // want `\(\*a.ptrStringer\).Warnf format %#s has unrecognized flag #` |
| f.Warn2(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Warn2 call has possible formatting directive %s` |
| f.Warnf2(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Warnf2 call needs 1 arg but has 2 args` |
| f.Warnf2(0, "%r", "hello") // want `\(\*a.ptrStringer\).Warnf2 format %r has unknown verb r` |
| f.Warnf2(0, "%#s", "hello") // want `\(\*a.ptrStringer\).Warnf2 format %#s has unrecognized flag #` |
| f.Wrap(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Wrap call has possible formatting directive %s` |
| f.Wrapf(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Wrapf call needs 1 arg but has 2 args` |
| f.Wrapf(0, "%r", "hello") // want `\(\*a.ptrStringer\).Wrapf format %r has unknown verb r` |
| f.Wrapf(0, "%#s", "hello") // want `\(\*a.ptrStringer\).Wrapf format %#s has unrecognized flag #` |
| f.Wrap2(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Wrap2 call has possible formatting directive %s` |
| f.Wrapf2(0, "%s", "hello", 3) // want `\(\*a.ptrStringer\).Wrapf2 call needs 1 arg but has 2 args` |
| f.Wrapf2(0, "%r", "hello") // want `\(\*a.ptrStringer\).Wrapf2 format %r has unknown verb r` |
| f.Wrapf2(0, "%#s", "hello") // want `\(\*a.ptrStringer\).Wrapf2 format %#s has unrecognized flag #` |
| fmt.Printf("%#s", FormatterVal(true)) // correct (the type is responsible for formatting) |
| Printf("d%", 2) // want "a.Printf format % is missing verb at end of string" |
| Printf("%d", percentDV) |
| Printf("%d", &percentDV) |
| Printf("%d", notPercentDV) // want "a.Printf format %d has arg notPercentDV of wrong type a.notPercentDStruct" |
| Printf("%d", ¬PercentDV) // want `a.Printf format %d has arg ¬PercentDV of wrong type \*a.notPercentDStruct` |
| Printf("%p", ¬PercentDV) // Works regardless: we print it as a pointer. |
| Printf("%q", &percentDV) // want `a.Printf format %q has arg &percentDV of wrong type \*a.percentDStruct` |
| Printf("%s", percentSV) |
| Printf("%s", &percentSV) |
| // Good argument reorderings. |
| Printf("%[1]d", 3) |
| Printf("%[1]*d", 3, 1) |
| Printf("%[2]*[1]d", 1, 3) |
| Printf("%[2]*.[1]*[3]d", 2, 3, 4) |
| fmt.Fprintf(os.Stderr, "%[2]*.[1]*[3]d", 2, 3, 4) // Use Fprintf to make sure we count arguments correctly. |
| // Bad argument reorderings. |
| Printf("%[xd", 3) // want `a.Printf format %\[xd is missing closing \]` |
| Printf("%[x]d x", 3) // want `a.Printf format has invalid argument index \[x\]` |
| Printf("%[3]*s x", "hi", 2) // want `a.Printf format has invalid argument index \[3\]` |
| _ = fmt.Sprintf("%[3]d x", 2) // want `fmt.Sprintf format has invalid argument index \[3\]` |
| Printf("%[2]*.[1]*[3]d x", 2, "hi", 4) // want `a.Printf format %\[2]\*\.\[1\]\*\[3\]d uses non-int \x22hi\x22 as argument of \*` |
| Printf("%[0]s x", "arg1") // want `a.Printf format has invalid argument index \[0\]` |
| Printf("%[0]d x", 1) // want `a.Printf format has invalid argument index \[0\]` |
| // Something that satisfies the error interface. |
| var e error |
| fmt.Println(e.Error()) // ok |
| // Something that looks like an error interface but isn't, such as the (*T).Error method |
| // in the testing package. |
| var et1 *testing.T |
| et1.Error() // ok |
| et1.Error("hi") // ok |
| et1.Error("%d", 3) // want `\(\*testing.common\).Error call has possible formatting directive %d` |
| et1.Errorf("%s", 1) // want `\(\*testing.common\).Errorf format %s has arg 1 of wrong type int` |
| var et3 errorTest3 |
| et3.Error() // ok, not an error method. |
| var et4 errorTest4 |
| et4.Error() // ok, not an error method. |
| var et5 errorTest5 |
| et5.error() // ok, not an error method. |
| // Interfaces can be used with any verb. |
| var iface interface { |
| ToTheMadness() bool // Method ToTheMadness usually returns false |
| } |
| fmt.Printf("%f", iface) // ok: fmt treats interfaces as transparent and iface may well have a float concrete type |
| // Can't print a function. |
| Printf("%d", someFunction) // want "a.Printf format %d arg someFunction is a func value, not called" |
| Printf("%v", someFunction) // want "a.Printf format %v arg someFunction is a func value, not called" |
| Println(someFunction) // want "a.Println arg someFunction is a func value, not called" |
| Printf("%p", someFunction) // ok: maybe someone wants to see the pointer |
| Printf("%T", someFunction) // ok: maybe someone wants to see the type |
| // Bug: used to recur forever. |
| Printf("%p %x", recursiveStructV, recursiveStructV.next) |
| Printf("%p %x", recursiveStruct1V, recursiveStruct1V.next) // want `a.Printf format %x has arg recursiveStruct1V\.next of wrong type \*a\.RecursiveStruct2` |
| Printf("%p %x", recursiveSliceV, recursiveSliceV) |
| Printf("%p %x", recursiveMapV, recursiveMapV) |
| // Special handling for Log. |
| math.Log(3) // OK |
| var t *testing.T |
| t.Log("%d", 3) // want `\(\*testing.common\).Log call has possible formatting directive %d` |
| t.Logf("%d", 3) |
| t.Logf("%d", "hi") // want `\(\*testing.common\).Logf format %d has arg "hi" of wrong type string` |
| |
| Errorf(1, "%d", 3) // OK |
| Errorf(1, "%d", "hi") // want `a.Errorf format %d has arg "hi" of wrong type string` |
| |
| // Multiple string arguments before variadic args |
| errorf("WARNING", "foobar") // OK |
| errorf("INFO", "s=%s, n=%d", "foo", 1) // OK |
| errorf("ERROR", "%d") // want "a.errorf format %d reads arg #1, but call has 0 args" |
| |
| var tb testing.TB |
| tb.Errorf("%s", 1) // want `\(testing.TB\).Errorf format %s has arg 1 of wrong type int` |
| |
| // Printf from external package |
| // externalprintf.Printf("%d", 42) // OK |
| // externalprintf.Printf("foobar") // OK |
| // level := 123 |
| // externalprintf.Logf(level, "%d", 42) // OK |
| // externalprintf.Errorf(level, level, "foo %q bar", "foobar") // OK |
| // externalprintf.Logf(level, "%d") // no error "Logf format %d reads arg #1, but call has 0 args" |
| // var formatStr = "%s %s" |
| // externalprintf.Sprintf(formatStr, "a", "b") // OK |
| // externalprintf.Logf(level, formatStr, "a", "b") // OK |
| |
| // user-defined Println-like functions |
| ss := &someStruct{} |
| ss.Log(someFunction, "foo") // OK |
| ss.Error(someFunction, someFunction) // OK |
| ss.Println() // OK |
| ss.Println(1.234, "foo") // OK |
| ss.Println(1, someFunction) // no error "Println arg someFunction is a func value, not called" |
| ss.log(someFunction) // OK |
| ss.log(someFunction, "bar", 1.33) // OK |
| ss.log(someFunction, someFunction) // no error "log arg someFunction is a func value, not called" |
| |
| // indexed arguments |
| Printf("%d %[3]d %d %[2]d x", 1, 2, 3, 4) // OK |
| Printf("%d %[0]d %d %[2]d x", 1, 2, 3, 4) // want `a.Printf format has invalid argument index \[0\]` |
| Printf("%d %[3]d %d %[-2]d x", 1, 2, 3, 4) // want `a.Printf format has invalid argument index \[-2\]` |
| Printf("%d %[3]d %d %[2234234234234]d x", 1, 2, 3, 4) // want `a.Printf format has invalid argument index \[2234234234234\]` |
| Printf("%d %[3]d %-10d %[2]d x", 1, 2, 3) // want "a.Printf format %-10d reads arg #4, but call has 3 args" |
| Printf("%[1][3]d x", 1, 2) // want `a.Printf format %\[1\]\[ has unknown verb \[` |
| Printf("%[1]d x", 1, 2) // OK |
| Printf("%d %[3]d %d %[2]d x", 1, 2, 3, 4, 5) // OK |
| |
| // wrote Println but meant Fprintln |
| Printf("%p\n", os.Stdout) // OK |
| Println(os.Stdout, "hello") // want "a.Println does not take io.Writer but has first arg os.Stdout" |
| |
| Printf(someString(), "hello") // OK |
| |
| // Printf wrappers in package log should be detected automatically |
| logpkg.Fatal("%d", 1) // want "log.Fatal call has possible formatting directive %d" |
| logpkg.Fatalf("%d", "x") // want `log.Fatalf format %d has arg "x" of wrong type string` |
| logpkg.Fatalln("%d", 1) // want "log.Fatalln call has possible formatting directive %d" |
| logpkg.Panic("%d", 1) // want "log.Panic call has possible formatting directive %d" |
| logpkg.Panicf("%d", "x") // want `log.Panicf format %d has arg "x" of wrong type string` |
| logpkg.Panicln("%d", 1) // want "log.Panicln call has possible formatting directive %d" |
| logpkg.Print("%d", 1) // want "log.Print call has possible formatting directive %d" |
| logpkg.Printf("%d", "x") // want `log.Printf format %d has arg "x" of wrong type string` |
| logpkg.Println("%d", 1) // want "log.Println call has possible formatting directive %d" |
| |
| // Methods too. |
| var l *logpkg.Logger |
| l.Fatal("%d", 1) // want `\(\*log.Logger\).Fatal call has possible formatting directive %d` |
| l.Fatalf("%d", "x") // want `\(\*log.Logger\).Fatalf format %d has arg "x" of wrong type string` |
| l.Fatalln("%d", 1) // want `\(\*log.Logger\).Fatalln call has possible formatting directive %d` |
| l.Panic("%d", 1) // want `\(\*log.Logger\).Panic call has possible formatting directive %d` |
| l.Panicf("%d", "x") // want `\(\*log.Logger\).Panicf format %d has arg "x" of wrong type string` |
| l.Panicln("%d", 1) // want `\(\*log.Logger\).Panicln call has possible formatting directive %d` |
| l.Print("%d", 1) // want `\(\*log.Logger\).Print call has possible formatting directive %d` |
| l.Printf("%d", "x") // want `\(\*log.Logger\).Printf format %d has arg "x" of wrong type string` |
| l.Println("%d", 1) // want `\(\*log.Logger\).Println call has possible formatting directive %d` |
| |
| // Issue 26486 |
| dbg("", 1) // no error "call has arguments but no formatting directive" |
| |
| // %w |
| _ = fmt.Errorf("%w", err) |
| _ = fmt.Errorf("%#w", err) |
| _ = fmt.Errorf("%[2]w %[1]s", "x", err) |
| _ = fmt.Errorf("%[2]w %[1]s", e, "x") // want `fmt.Errorf format %\[2\]w has arg "x" of wrong type string` |
| _ = fmt.Errorf("%w", "x") // want `fmt.Errorf format %w has arg "x" of wrong type string` |
| _ = fmt.Errorf("%w %w", err, err) // want `fmt.Errorf call has more than one error-wrapping directive %w` |
| fmt.Printf("%w", err) // want `fmt.Printf call has error-wrapping directive %w` |
| Errorf(0, "%w", err) |
| } |
| |
| func someString() string { return "X" } |
| |
| type someStruct struct{} |
| |
| // Log is non-variadic user-define Println-like function. |
| // Calls to this func must be skipped when checking |
| // for Println-like arguments. |
| func (ss *someStruct) Log(f func(), s string) {} |
| |
| // Error is variadic user-define Println-like function. |
| // Calls to this func mustn't be checked for Println-like arguments, |
| // since variadic arguments type isn't interface{}. |
| func (ss *someStruct) Error(args ...func()) {} |
| |
| // Println is variadic user-defined Println-like function. |
| // Calls to this func must be checked for Println-like arguments. |
| func (ss *someStruct) Println(args ...interface{}) {} |
| |
| // log is variadic user-defined Println-like function. |
| // Calls to this func must be checked for Println-like arguments. |
| func (ss *someStruct) log(f func(), args ...interface{}) {} |
| |
| // A function we use as a function value; it has no other purpose. |
| func someFunction() {} |
| |
| // Printf is used by the test so we must declare it. |
| func Printf(format string, args ...interface{}) { // want Printf:"printfWrapper" |
| fmt.Printf(format, args...) |
| } |
| |
| // Println is used by the test so we must declare it. |
| func Println(args ...interface{}) { // want Println:"printWrapper" |
| fmt.Println(args...) |
| } |
| |
| // printf is used by the test so we must declare it. |
| func printf(format string, args ...interface{}) { // want printf:"printfWrapper" |
| fmt.Printf(format, args...) |
| } |
| |
| // Errorf is used by the test for a case in which the first parameter |
| // is not a format string. |
| func Errorf(i int, format string, args ...interface{}) { // want Errorf:"errorfWrapper" |
| _ = fmt.Errorf(format, args...) |
| } |
| |
| // errorf is used by the test for a case in which the function accepts multiple |
| // string parameters before variadic arguments |
| func errorf(level, format string, args ...interface{}) { // want errorf:"errorfWrapper" |
| _ = fmt.Errorf(format, args...) |
| } |
| |
| // multi is used by the test. |
| func multi() []interface{} { |
| panic("don't call - testing only") |
| } |
| |
| type stringer int |
| |
| func (stringer) String() string { return "string" } |
| |
| type ptrStringer float64 |
| |
| var stringerv ptrStringer |
| |
| func (*ptrStringer) String() string { |
| return "string" |
| } |
| |
| func (p *ptrStringer) Warn2(x int, args ...interface{}) string { // want Warn2:"printWrapper" |
| return p.Warn(x, args...) |
| } |
| |
| func (p *ptrStringer) Warnf2(x int, format string, args ...interface{}) string { // want Warnf2:"printfWrapper" |
| return p.Warnf(x, format, args...) |
| } |
| |
| // During testing -printf.funcs flag matches Warn. |
| func (*ptrStringer) Warn(x int, args ...interface{}) string { |
| return "warn" |
| } |
| |
| // During testing -printf.funcs flag matches Warnf. |
| func (*ptrStringer) Warnf(x int, format string, args ...interface{}) string { |
| return "warnf" |
| } |
| |
| func (p *ptrStringer) Wrap2(x int, args ...interface{}) string { // want Wrap2:"printWrapper" |
| return p.Wrap(x, args...) |
| } |
| |
| func (p *ptrStringer) Wrapf2(x int, format string, args ...interface{}) string { // want Wrapf2:"printfWrapper" |
| return p.Wrapf(x, format, args...) |
| } |
| |
| func (*ptrStringer) Wrap(x int, args ...interface{}) string { // want Wrap:"printWrapper" |
| return fmt.Sprint(args...) |
| } |
| |
| func (*ptrStringer) Wrapf(x int, format string, args ...interface{}) string { // want Wrapf:"printfWrapper" |
| return fmt.Sprintf(format, args...) |
| } |
| |
| func (*ptrStringer) BadWrap(x int, args ...interface{}) string { |
| return fmt.Sprint(args) // want "missing ... in args forwarded to print-like function" |
| } |
| |
| func (*ptrStringer) BadWrapf(x int, format string, args ...interface{}) string { |
| return fmt.Sprintf(format, args) // want "missing ... in args forwarded to printf-like function" |
| } |
| |
| func (*ptrStringer) WrapfFalsePositive(x int, arg1 string, arg2 ...interface{}) string { |
| return fmt.Sprintf("%s %v", arg1, arg2) |
| } |
| |
| type embeddedStringer struct { |
| foo string |
| ptrStringer |
| bar int |
| } |
| |
| var embeddedStringerv embeddedStringer |
| |
| type notstringer struct { |
| f float64 |
| } |
| |
| var notstringerv notstringer |
| |
| type stringerarray [4]float64 |
| |
| func (stringerarray) String() string { |
| return "string" |
| } |
| |
| var stringerarrayv stringerarray |
| |
| type notstringerarray [4]float64 |
| |
| var notstringerarrayv notstringerarray |
| |
| var nonemptyinterface = interface { |
| f() |
| }(nil) |
| |
| // A data type we can print with "%d". |
| type percentDStruct struct { |
| a int |
| b []byte |
| c *float64 |
| } |
| |
| var percentDV percentDStruct |
| |
| // A data type we cannot print correctly with "%d". |
| type notPercentDStruct struct { |
| a int |
| b []byte |
| c bool |
| } |
| |
| var notPercentDV notPercentDStruct |
| |
| // A data type we can print with "%s". |
| type percentSStruct struct { |
| a string |
| b []byte |
| C stringerarray |
| } |
| |
| var percentSV percentSStruct |
| |
| type recursiveStringer int |
| |
| func (s recursiveStringer) String() string { |
| _ = fmt.Sprintf("%d", s) |
| _ = fmt.Sprintf("%#v", s) |
| _ = fmt.Sprintf("%v", s) // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveStringer\).String method call` |
| _ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveStringer\).String method call` |
| _ = fmt.Sprintf("%T", s) // ok; does not recursively call String |
| return fmt.Sprintln(s) // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveStringer\).String method` |
| } |
| |
| type recursivePtrStringer int |
| |
| func (p *recursivePtrStringer) String() string { |
| _ = fmt.Sprintf("%v", *p) |
| _ = fmt.Sprint(&p) // ok; prints address |
| return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrStringer\).String method` |
| } |
| |
| type recursiveError int |
| |
| func (s recursiveError) Error() string { |
| _ = fmt.Sprintf("%d", s) |
| _ = fmt.Sprintf("%#v", s) |
| _ = fmt.Sprintf("%v", s) // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveError\).Error method call` |
| _ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveError\).Error method call` |
| _ = fmt.Sprintf("%T", s) // ok; does not recursively call Error |
| return fmt.Sprintln(s) // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveError\).Error method` |
| } |
| |
| type recursivePtrError int |
| |
| func (p *recursivePtrError) Error() string { |
| _ = fmt.Sprintf("%v", *p) |
| _ = fmt.Sprint(&p) // ok; prints address |
| return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrError\).Error method` |
| } |
| |
| type recursiveStringerAndError int |
| |
| func (s recursiveStringerAndError) String() string { |
| _ = fmt.Sprintf("%d", s) |
| _ = fmt.Sprintf("%#v", s) |
| _ = fmt.Sprintf("%v", s) // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveStringerAndError\).String method call` |
| _ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveStringerAndError\).String method call` |
| _ = fmt.Sprintf("%T", s) // ok; does not recursively call String |
| return fmt.Sprintln(s) // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveStringerAndError\).String method` |
| } |
| |
| func (s recursiveStringerAndError) Error() string { |
| _ = fmt.Sprintf("%d", s) |
| _ = fmt.Sprintf("%#v", s) |
| _ = fmt.Sprintf("%v", s) // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveStringerAndError\).Error method call` |
| _ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveStringerAndError\).Error method call` |
| _ = fmt.Sprintf("%T", s) // ok; does not recursively call Error |
| return fmt.Sprintln(s) // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveStringerAndError\).Error method` |
| } |
| |
| type recursivePtrStringerAndError int |
| |
| func (p *recursivePtrStringerAndError) String() string { |
| _ = fmt.Sprintf("%v", *p) |
| _ = fmt.Sprint(&p) // ok; prints address |
| return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrStringerAndError\).String method` |
| } |
| |
| func (p *recursivePtrStringerAndError) Error() string { |
| _ = fmt.Sprintf("%v", *p) |
| _ = fmt.Sprint(&p) // ok; prints address |
| return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrStringerAndError\).Error method` |
| } |
| |
| // implements a String() method but with non-matching return types |
| type nonStringerWrongReturn int |
| |
| func (s nonStringerWrongReturn) String() (string, error) { |
| return "", fmt.Errorf("%v", s) |
| } |
| |
| // implements a String() method but with non-matching arguments |
| type nonStringerWrongArgs int |
| |
| func (s nonStringerWrongArgs) String(i int) string { |
| return fmt.Sprintf("%d%v", i, s) |
| } |
| |
| type cons struct { |
| car int |
| cdr *cons |
| } |
| |
| func (cons *cons) String() string { |
| if cons == nil { |
| return "nil" |
| } |
| _ = fmt.Sprint(cons.cdr) // don't want "recursive call" diagnostic |
| return fmt.Sprintf("(%d . %v)", cons.car, cons.cdr) // don't want "recursive call" diagnostic |
| } |
| |
| type BoolFormatter bool |
| |
| func (*BoolFormatter) Format(fmt.State, rune) { |
| } |
| |
| // Formatter with value receiver |
| type FormatterVal bool |
| |
| func (FormatterVal) Format(fmt.State, rune) { |
| } |
| |
| type RecursiveSlice []RecursiveSlice |
| |
| var recursiveSliceV = &RecursiveSlice{} |
| |
| type RecursiveMap map[int]RecursiveMap |
| |
| var recursiveMapV = make(RecursiveMap) |
| |
| type RecursiveStruct struct { |
| next *RecursiveStruct |
| } |
| |
| var recursiveStructV = &RecursiveStruct{} |
| |
| type RecursiveStruct1 struct { |
| next *RecursiveStruct2 |
| } |
| |
| type RecursiveStruct2 struct { |
| next *RecursiveStruct1 |
| } |
| |
| var recursiveStruct1V = &RecursiveStruct1{} |
| |
| type unexportedInterface struct { |
| f interface{} |
| } |
| |
| // Issue 17798: unexported ptrStringer cannot be formatted. |
| type unexportedStringer struct { |
| t ptrStringer |
| } |
| type unexportedStringerOtherFields struct { |
| s string |
| t ptrStringer |
| S string |
| } |
| |
| // Issue 17798: unexported error cannot be formatted. |
| type unexportedError struct { |
| e error |
| } |
| type unexportedErrorOtherFields struct { |
| s string |
| e error |
| S string |
| } |
| |
| type errorer struct{} |
| |
| func (e errorer) Error() string { return "errorer" } |
| |
| type unexportedCustomError struct { |
| e errorer |
| } |
| |
| type errorInterface interface { |
| error |
| ExtraMethod() |
| } |
| |
| type unexportedErrorInterface struct { |
| e errorInterface |
| } |
| |
| func UnexportedStringerOrError() { |
| fmt.Printf("%s", unexportedInterface{"foo"}) // ok; prints {foo} |
| fmt.Printf("%s", unexportedInterface{3}) // ok; we can't see the problem |
| |
| us := unexportedStringer{} |
| fmt.Printf("%s", us) // want "Printf format %s has arg us of wrong type a.unexportedStringer" |
| fmt.Printf("%s", &us) // want "Printf format %s has arg &us of wrong type [*]a.unexportedStringer" |
| |
| usf := unexportedStringerOtherFields{ |
| s: "foo", |
| S: "bar", |
| } |
| fmt.Printf("%s", usf) // want "Printf format %s has arg usf of wrong type a.unexportedStringerOtherFields" |
| fmt.Printf("%s", &usf) // want "Printf format %s has arg &usf of wrong type [*]a.unexportedStringerOtherFields" |
| |
| ue := unexportedError{ |
| e: &errorer{}, |
| } |
| fmt.Printf("%s", ue) // want "Printf format %s has arg ue of wrong type a.unexportedError" |
| fmt.Printf("%s", &ue) // want "Printf format %s has arg &ue of wrong type [*]a.unexportedError" |
| |
| uef := unexportedErrorOtherFields{ |
| s: "foo", |
| e: &errorer{}, |
| S: "bar", |
| } |
| fmt.Printf("%s", uef) // want "Printf format %s has arg uef of wrong type a.unexportedErrorOtherFields" |
| fmt.Printf("%s", &uef) // want "Printf format %s has arg &uef of wrong type [*]a.unexportedErrorOtherFields" |
| |
| uce := unexportedCustomError{ |
| e: errorer{}, |
| } |
| fmt.Printf("%s", uce) // want "Printf format %s has arg uce of wrong type a.unexportedCustomError" |
| |
| uei := unexportedErrorInterface{} |
| fmt.Printf("%s", uei) // want "Printf format %s has arg uei of wrong type a.unexportedErrorInterface" |
| fmt.Println("foo\n", "bar") // not an error |
| |
| fmt.Println("foo\n") // want "Println arg list ends with redundant newline" |
| fmt.Println("foo\\n") // not an error |
| fmt.Println(`foo\n`) // not an error |
| |
| intSlice := []int{3, 4} |
| fmt.Printf("%s", intSlice) // want `fmt.Printf format %s has arg intSlice of wrong type \[\]int` |
| nonStringerArray := [1]unexportedStringer{{}} |
| fmt.Printf("%s", nonStringerArray) // want `fmt.Printf format %s has arg nonStringerArray of wrong type \[1\]a.unexportedStringer` |
| fmt.Printf("%s", []stringer{3, 4}) // not an error |
| fmt.Printf("%s", [2]stringer{3, 4}) // not an error |
| } |
| |
| // TODO: Disable complaint about '0' for Go 1.10. To be fixed properly in 1.11. |
| // See issues 23598 and 23605. |
| func DisableErrorForFlag0() { |
| fmt.Printf("%0t", true) |
| } |
| |
| // Issue 26486. |
| func dbg(format string, args ...interface{}) { |
| if format == "" { |
| format = "%v" |
| } |
| fmt.Printf(format, args...) |
| } |
| |
| func PointersToCompoundTypes() { |
| stringSlice := []string{"a", "b"} |
| fmt.Printf("%s", &stringSlice) // not an error |
| |
| intSlice := []int{3, 4} |
| fmt.Printf("%s", &intSlice) // want `fmt.Printf format %s has arg &intSlice of wrong type \*\[\]int` |
| |
| stringArray := [2]string{"a", "b"} |
| fmt.Printf("%s", &stringArray) // not an error |
| |
| intArray := [2]int{3, 4} |
| fmt.Printf("%s", &intArray) // want `fmt.Printf format %s has arg &intArray of wrong type \*\[2\]int` |
| |
| stringStruct := struct{ F string }{"foo"} |
| fmt.Printf("%s", &stringStruct) // not an error |
| |
| intStruct := struct{ F int }{3} |
| fmt.Printf("%s", &intStruct) // want `fmt.Printf format %s has arg &intStruct of wrong type \*struct{F int}` |
| |
| stringMap := map[string]string{"foo": "bar"} |
| fmt.Printf("%s", &stringMap) // not an error |
| |
| intMap := map[int]int{3: 4} |
| fmt.Printf("%s", &intMap) // want `fmt.Printf format %s has arg &intMap of wrong type \*map\[int\]int` |
| |
| type T2 struct { |
| X string |
| } |
| type T1 struct { |
| X *T2 |
| } |
| fmt.Printf("%s\n", T1{&T2{"x"}}) // want `fmt.Printf format %s has arg T1{&T2{.x.}} of wrong type a\.T1` |
| } |
| |
| // Printf wrappers from external package |
| func externalPackage() { |
| b.Wrapf("%s", 1) // want "Wrapf format %s has arg 1 of wrong type int" |
| b.Wrap("%s", 1) // want "Wrap call has possible formatting directive %s" |
| b.NoWrap("%s", 1) |
| b.Wrapf2("%s", 1) // want "Wrapf2 format %s has arg 1 of wrong type int" |
| } |
| |
| func PointerVerbs() { |
| // Use booleans, so that we don't just format the elements like in |
| // PointersToCompoundTypes. Bools can only be formatted with verbs like |
| // %t and %v, and none of the ones below. |
| ptr := new(bool) |
| slice := []bool{} |
| array := [3]bool{} |
| map_ := map[bool]bool{} |
| chan_ := make(chan bool) |
| func_ := func(bool) {} |
| |
| // %p, %b, %d, %o, %O, %x, and %X all support pointers. |
| fmt.Printf("%p", ptr) |
| fmt.Printf("%b", ptr) |
| fmt.Printf("%d", ptr) |
| fmt.Printf("%o", ptr) |
| fmt.Printf("%O", ptr) |
| fmt.Printf("%x", ptr) |
| fmt.Printf("%X", ptr) |
| |
| // %p, %b, %d, %o, %O, %x, and %X all support channels. |
| fmt.Printf("%p", chan_) |
| fmt.Printf("%b", chan_) |
| fmt.Printf("%d", chan_) |
| fmt.Printf("%o", chan_) |
| fmt.Printf("%O", chan_) |
| fmt.Printf("%x", chan_) |
| fmt.Printf("%X", chan_) |
| |
| // %p is the only one that supports funcs. |
| fmt.Printf("%p", func_) |
| fmt.Printf("%b", func_) // want `fmt.Printf format %b arg func_ is a func value, not called` |
| fmt.Printf("%d", func_) // want `fmt.Printf format %d arg func_ is a func value, not called` |
| fmt.Printf("%o", func_) // want `fmt.Printf format %o arg func_ is a func value, not called` |
| fmt.Printf("%O", func_) // want `fmt.Printf format %O arg func_ is a func value, not called` |
| fmt.Printf("%x", func_) // want `fmt.Printf format %x arg func_ is a func value, not called` |
| fmt.Printf("%X", func_) // want `fmt.Printf format %X arg func_ is a func value, not called` |
| |
| // %p is the only one that supports all slices, by printing the address |
| // of the 0th element. |
| fmt.Printf("%p", slice) // supported; address of 0th element |
| fmt.Printf("%b", slice) // want `fmt.Printf format %b has arg slice of wrong type \[\]bool` |
| |
| fmt.Printf("%d", slice) // want `fmt.Printf format %d has arg slice of wrong type \[\]bool` |
| |
| fmt.Printf("%o", slice) // want `fmt.Printf format %o has arg slice of wrong type \[\]bool` |
| fmt.Printf("%O", slice) // want `fmt.Printf format %O has arg slice of wrong type \[\]bool` |
| |
| fmt.Printf("%x", slice) // want `fmt.Printf format %x has arg slice of wrong type \[\]bool` |
| fmt.Printf("%X", slice) // want `fmt.Printf format %X has arg slice of wrong type \[\]bool` |
| |
| // None support arrays. |
| fmt.Printf("%p", array) // want `fmt.Printf format %p has arg array of wrong type \[3\]bool` |
| fmt.Printf("%b", array) // want `fmt.Printf format %b has arg array of wrong type \[3\]bool` |
| fmt.Printf("%d", array) // want `fmt.Printf format %d has arg array of wrong type \[3\]bool` |
| fmt.Printf("%o", array) // want `fmt.Printf format %o has arg array of wrong type \[3\]bool` |
| fmt.Printf("%O", array) // want `fmt.Printf format %O has arg array of wrong type \[3\]bool` |
| fmt.Printf("%x", array) // want `fmt.Printf format %x has arg array of wrong type \[3\]bool` |
| fmt.Printf("%X", array) // want `fmt.Printf format %X has arg array of wrong type \[3\]bool` |
| |
| // %p is the only one that supports all maps. |
| fmt.Printf("%p", map_) // supported; address of 0th element |
| fmt.Printf("%b", map_) // want `fmt.Printf format %b has arg map_ of wrong type map\[bool\]bool` |
| |
| fmt.Printf("%d", map_) // want `fmt.Printf format %d has arg map_ of wrong type map\[bool\]bool` |
| |
| fmt.Printf("%o", map_) // want `fmt.Printf format %o has arg map_ of wrong type map\[bool\]bool` |
| fmt.Printf("%O", map_) // want `fmt.Printf format %O has arg map_ of wrong type map\[bool\]bool` |
| |
| fmt.Printf("%x", map_) // want `fmt.Printf format %x has arg map_ of wrong type map\[bool\]bool` |
| fmt.Printf("%X", map_) // want `fmt.Printf format %X has arg map_ of wrong type map\[bool\]bool` |
| } |
