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kroeningkroening
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C23 keywords
This adds scanner, parser and typechecker support for the new C23 keywords.
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‎README.md

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About
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=====
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CBMC is a Bounded Model Checker for C and C++ programs. It supports C89, C99,
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most of C11 and most compiler extensions provided by gcc and Visual Studio. It
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also supports SystemC using Scoot. It allows verifying array bounds (buffer
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overflows), pointer safety, exceptions and user-specified assertions.
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Furthermore, it can check C and C++ for consistency with other languages, such
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as Verilog. The verification is performed by unwinding the loops in the program
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and passing the resulting equation to a decision procedure.
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CBMC is a Bounded Model Checker for C and C++ programs. It supports C89,
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C99, most of C11, C17, C23 and most compiler extensions provided by gcc and
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Visual Studio. It also supports SystemC using Scoot. It allows verifying
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array bounds (buffer overflows), pointer safety, exceptions and
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user-specified assertions. Furthermore, it can check C and C++ for
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consistency with other languages, such as Verilog. The verification is
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performed by unwinding the loops in the program and passing the resulting
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equation to a decision procedure.
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For full information see [cprover.org](http://www.cprover.org/cbmc).
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‎doc/architectural/front-page.md

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<a href="https://github.com/diffblue/cbmc">repository</a> hosted on GitHub. CBMC
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is part of CProver.
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CBMC is a Bounded Model Checker for C and C++ programs. It supports C89, C99,
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most of C11 and most compiler extensions provided by gcc and Visual Studio. It
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also supports SystemC using Scoot. It allows verifying array bounds (buffer
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overflows), pointer safety, arithmetic exceptions and user-specified assertions.
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Furthermore, it can check C and C++ for consistency with other languages, such
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as Verilog. The verification is performed by unwinding the loops in the program
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and passing the resulting equation to a decision procedure.
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CBMC is a Bounded Model Checker for C and C++ programs. It supports C89,
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C99, most of C11, C17, C23 and most compiler extensions provided by gcc and
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Visual Studio. It also supports SystemC using Scoot. It allows verifying
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array bounds (buffer overflows), pointer safety, arithmetic exceptions and
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user-specified assertions. Furthermore, it can check C and C++ for
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consistency with other languages, such as Verilog. The verification is
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performed by unwinding the loops in the program and passing the resulting
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equation to a decision procedure.
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For further information see [cprover.org](http://www.cprover.org/cbmc).
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‎doc/man/cbmc.1

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\fB\-D\fR macro
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define preprocessor macro (C/C++)
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.TP
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\fB\-\-c89\fR, \fB\-\-c99\fR, \fB\-\-c11\fR
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\fB\-\-c89\fR, \fB\-\-c99\fR, \fB\-\-c11\fR, \fB\-\-c17\fR, \fB\-\-c23\fR
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set C language standard (default: c11)
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.TP
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\fB\-\-cpp98\fR, \fB\-\-cpp03\fR, \fB\-\-cpp11\fR

‎doc/man/goto-analyzer.1

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\fB\-D\fR macro
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define preprocessor macro (C/C++)
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.TP
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\fB\-\-c89\fR, \fB\-\-c99\fR, \fB\-\-c11\fR
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\fB\-\-c89\fR, \fB\-\-c99\fR, \fB\-\-c11\fR, \fB\-\-c17\fR, \fB\-\-c23\fR
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set C language standard (default: c11)
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.TP
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\fB\-\-cpp98\fR, \fB\-\-cpp03\fR, \fB\-\-cpp11\fR

‎regression/cbmc/_BitInt/_BitInt1.c

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// _BitInt is a C23 feature
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// sizeof
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static_assert(sizeof(unsigned _BitInt(1)) == 1);
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static_assert(sizeof(_BitInt(32)) == 4);
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static_assert(sizeof(_BitInt(33)) == 8);
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static_assert(sizeof(_BitInt(65)) == 16);
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static_assert(sizeof(_BitInt(128)) == 16);
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int main()
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{
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return 0;
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}

‎regression/cbmc/_BitInt/_BitInt1.desc

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CORE
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_BitInt1.c
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--c23
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^EXIT=0$
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^SIGNAL=0$
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--
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^warning: ignoring
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^CONVERSION ERROR$

‎regression/cbmc/_BitInt/_BitInt2.c

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// _BitInt is a C23 feature
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#include <assert.h>
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int main()
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{
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// casts
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// assert((_BitInt(4))17 == 1);
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// assert((_BitInt(4)) - 1 == -1);
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// assert((unsigned _BitInt(4)) - 1 == 15);
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// promotion (or lack thereof)
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// assert((unsigned _BitInt(4))15 + (unsigned _BitInt(4))1 == 0);
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// assert((unsigned _BitInt(4))15 + (unsigned _BitInt(5))1 == 16);
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// assert((unsigned _BitInt(4))15 + (signed _BitInt(5))1 == -16);
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// assert((unsigned _BitInt(4))15 + 1 == 16);
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return 0;
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}

‎regression/cbmc/_BitInt/_BitInt2.desc

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KNOWNBUG
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_BitInt2.c
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--c23
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^EXIT=0$
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^SIGNAL=0$
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--
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^warning: ignoring
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^CONVERSION ERROR$
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--
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_BitInt implementation is missing.

‎regression/cbmc/_BitInt/_BitInt3.c

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// _BitInt is a C23 feature
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#include <assert.h>
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int main()
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{
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// pointers
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_BitInt(3) x, *p = &x;
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*p = 1;
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return 0;
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}

‎regression/cbmc/_BitInt/_BitInt3.desc

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KNOWNBUG
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_BitInt3.c
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--c23
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^EXIT=0$
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^SIGNAL=0$
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--
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^warning: ignoring
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^CONVERSION ERROR$
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--
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_BitInt implementation is missing.

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