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Diffstat (limited to 'compilerplugins/clang/test/stringadd.cxx')
| -rw-r--r-- | compilerplugins/clang/test/stringadd.cxx | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/compilerplugins/clang/test/stringadd.cxx b/compilerplugins/clang/test/stringadd.cxx new file mode 100644 index 000000000..f76464b9a --- /dev/null +++ b/compilerplugins/clang/test/stringadd.cxx @@ -0,0 +1,262 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#include <rtl/strbuf.hxx> +#include <rtl/string.hxx> +#include <rtl/ustrbuf.hxx> +#include <rtl/ustring.hxx> + +#pragma clang diagnostic ignored "-Wunknown-warning-option" // for Clang < 13 +#pragma clang diagnostic ignored "-Wunused-but-set-parameter" +#pragma clang diagnostic ignored "-Wunused-but-set-variable" + +// --------------------------------------------------------------- +// += tests + +namespace test1 +{ +static const char XXX1[] = "xxx"; +static constexpr char16_t XXX1u[] = u"xxx"; +static const char XXX2[] = "xxx"; +void f1(OUString s1, int i, OString o) +{ + OUString s2 = s1; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += s1; + s2 = s1 + "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += s1; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += OUString::number(i); + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += XXX1; + // expected-error-re@+2 {{rather use O[U]String::Concat than constructing 'rtl::OUStringLiteral<4>' from 'const char16_t{{ ?}}[4]' on LHS of + (where RHS is of type 'const char{{ ?}}[4]') [loplugin:stringadd]}} + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += OUStringLiteral(XXX1u) + XXX2; + + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += OStringToOUString(o, RTL_TEXTENCODING_UTF8); +} +void f2(OString s1, int i, OUString u) +{ + OString s2 = s1; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += s1; + s2 = s1 + "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += s1; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += OString::number(i); + + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += OUStringToOString(u, RTL_TEXTENCODING_ASCII_US); +} +void f3(OUString aStr, int nFirstContent) +{ + OUString aFirstStr = aStr.copy(0, nFirstContent); + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + aFirstStr += "..."; +} +OUString side_effect(); +void f4(int i) +{ + OUString s1; + OUString s2("xxx"); + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += "xxx"; + ++i; + // any other kind of statement breaks the chain (at least for now) + s2 += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s2 += side_effect(); + s1 += "yyy"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s1 += "yyy"; +} +} + +namespace test2 +{ +void f(OUString s3) +{ + s3 += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s3 += "xxx"; +} +void g(OString s3) +{ + s3 += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s3 += "xxx"; +} +} + +namespace test3 +{ +struct Bar +{ + OUString m_field; +}; +void f(Bar b1, Bar& b2, Bar* b3) +{ + OUString s3 = "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s3 += b1.m_field; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s3 += b2.m_field; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s3 += b3->m_field; +} +OUString side_effect(); +void f2(OUString s) +{ + OUString sRet = "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sRet += side_effect(); + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sRet += "xxx"; + sRet += side_effect(); + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sRet += "xxx"; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sRet += "xxx"; + sRet += s; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sRet += "xxx"; +} +} + +// no warning expected +namespace test4 +{ +OUString side_effect(); +void f() +{ + OUString sRet = "xxx"; +#if OSL_DEBUG_LEVEL > 0 + sRet += ";"; +#endif + sRet += " "; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sRet += side_effect(); +} +} + +// no warning expected +namespace test5 +{ +OUString side_effect(); +void f() +{ + OUString sRet = side_effect(); + sRet += side_effect(); +} +} + +namespace test6 +{ +void f(OUString sComma, OUString maExtension, int mnDocumentIconID) +{ + OUString sValue; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sValue += sComma + sComma + maExtension + sComma; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sValue += OUString::number(mnDocumentIconID) + sComma; +} +struct Foo +{ + OUString sFormula1; +}; +void g(int x, const Foo& aValidation) +{ + OUString sCondition; + switch (x) + { + case 1: + sCondition += "cell-content-is-in-list("; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + sCondition += aValidation.sFormula1 + ")"; + } +} +} + +// --------------------------------------------------------------- +// detecting OUString temporary construction in + + +namespace test9 +{ +OUString getByValue(); +const OUString& getByRef(); +void f1(OUString s, OUString t, int i, const char* pChar) +{ + // no warning expected + t = t + "xxx"; + // expected-error-re@+1 {{rather use O[U]String::Concat than constructing 'rtl::OUString' from 'const char{{ ?}}[4]' on RHS of + (where LHS is of type 'rtl::OUString') [loplugin:stringadd]}} + s = s + OUString("xxx"); + // expected-error@+1 {{rather use O[U]String::Concat than constructing 'rtl::OUString' from 'const rtl::OUString' on RHS of + (where LHS is of type 'rtl::OUString') [loplugin:stringadd]}} + s = s + OUString(getByRef()); + + // no warning expected + OUString a; + a = a + getByValue(); + + // no warning expected + OUString b; + b = b + (i == 1 ? "aaa" : "bbb"); + + // no warning expected + OUString c; + c = c + OUString(pChar, strlen(pChar), RTL_TEXTENCODING_UTF8); + + OUStringBuffer buf; + // expected-error@+1 {{chained append, rather use single append call and + operator [loplugin:stringadd]}} + buf.append(" ").append(b); +} +void f2(char ch) +{ + OString s; + // expected-error-re@+1 {{rather use O[U]String::Concat than constructing 'rtl::OString' from 'const char{{ ?}}[4]' on RHS of + (where LHS is of type 'rtl::OString') [loplugin:stringadd]}} + s = s + OString("xxx"); + // expected-error@+1 {{rather use O[U]String::Concat than constructing 'rtl::OString' from 'char' on RHS of + (where LHS is of type 'rtl::OString') [loplugin:stringadd]}} + s = s + OString(ch); +} +} + +namespace test10 +{ +struct C +{ + OString constStringFunction(int) const; + OString nonConstStringFunction(); + int constIntFunction() const; + int nonConstIntFunction(); +}; + +C getC(); + +void f1(C c) +{ + OString s; + // expected-error@+1 {{simplify by merging with the preceding assignment [loplugin:stringadd]}} + s += c.constStringFunction(c.constIntFunction()); + s += c.constStringFunction(c.nonConstIntFunction()); + s += c.nonConstStringFunction(); + s += getC().constStringFunction(c.constIntFunction()); +} +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */ |