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source: src/main.cc @ 046a890

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since 046a890 was 046a890, checked in by Andrew Beach <ajbeach@…>, 4 years ago
That should get default operations working for throws. More tests to come.
Property mode set to `100644`
File size: 25.6 KB

Line
1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// main.cc --
8	//
9	// Author : Peter Buhr and Rob Schluntz
10	// Created On : Fri May 15 23:12:02 2015
11	// Last Modified By : Andrew Beach
12	// Last Modified On : Tue May 19 12:03:00 2020
13	// Update Count : 634
14	//
15
16	#include <cxxabi.h> // for __cxa_demangle
17	#include <execinfo.h> // for backtrace, backtrace_symbols
18	#include <getopt.h> // for no_argument, optind, geto...
19	#include <cassert> // for assertf
20	#include <cstdio> // for fopen, FILE, fclose, stdin
21	#include <cstdlib> // for exit, free, abort, EXIT_F...
22	#include <csignal> // for signal, SIGABRT, SIGSEGV
23	#include <cstring> // for index
24	#include <fstream> // for ofstream
25	#include <iostream> // for operator<<, basic_ostream
26	#include <iomanip>
27	#include <iterator> // for back_inserter
28	#include <list> // for list
29	#include <string> // for char_traits, operator<<
30
31	using namespace std;
32
33
34	#include "CompilationState.h"
35	#include "../config.h" // for CFA_LIBDIR
36	#include "CodeGen/FixMain.h" // for FixMain
37	#include "CodeGen/FixNames.h" // for fixNames
38	#include "CodeGen/Generate.h" // for generate
39	#include "CodeTools/DeclStats.h" // for printDeclStats
40	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
41	#include "CodeTools/TrackLoc.h" // for fillLocations
42	#include "Common/CompilerError.h" // for CompilerError
43	#include "Common/Stats.h"
44	#include "Common/PassVisitor.h"
45	#include "Common/SemanticError.h" // for SemanticError
46	#include "Common/UnimplementedError.h" // for UnimplementedError
47	#include "Common/utility.h" // for deleteAll, filter, printAll
48	#include "Concurrency/Waitfor.h" // for generateWaitfor
49	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
50	#include "ControlStruct/Mutate.h" // for mutate
51	#include "GenPoly/Box.h" // for box
52	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
53	#include "GenPoly/Lvalue.h" // for convertLvalue
54	#include "GenPoly/Specialize.h" // for convertSpecializations
55	#include "InitTweak/FixInit.h" // for fix
56	#include "InitTweak/GenInit.h" // for genInit
57	#include "MakeLibCfa.h" // for makeLibCfa
58	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
59	#include "Parser/TypedefTable.h" // for TypedefTable
60	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
61	#include "ResolvExpr/Resolver.h" // for resolve
62	#include "SymTab/Validate.h" // for validate
63	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
64	#include "SynTree/Declaration.h" // for Declaration
65	#include "SynTree/Visitor.h" // for acceptAll
66	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
67	#include "Virtual/ExpandCasts.h" // for expandCasts
68
69
70	static void NewPass( const char * const name ) {
71	Stats::Heap::newPass( name );
72	using namespace Stats::Counters;
73	{
74	static auto group = build<CounterGroup>( "Pass Visitor" );
75	auto pass = build<CounterGroup>( name, group );
76	pass_visitor_stats.depth = 0;
77	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
78	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
79	}
80	{
81	static auto group = build<CounterGroup>( "Syntax Node" );
82	auto pass = build<CounterGroup>( name, group );
83	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
84	}
85	}
86
87	#define PASS( name, pass ) \
88	if ( errorp ) { cerr << name << endl; } \
89	NewPass(name); \
90	Stats::Time::StartBlock(name); \
91	pass; \
92	Stats::Time::StopBlock();
93
94	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
95	TypedefTable typedefTable;
96	DeclarationNode * parseTree = nullptr; // program parse tree
97
98	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
99
100	static string PreludeDirector = "";
101
102	static void parse_cmdline( int argc, char *argv[] );
103	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
104	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
105
106	static void backtrace( int start ) { // skip first N stack frames
107	enum { Frames = 50, }; // maximum number of stack frames
108	void * array[Frames];
109	size_t size = ::backtrace( array, Frames );
110	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
111
112	*index( messages[0], '(' ) = '\0'; // find executable name
113	cerr << "Stack back trace for: " << messages[0] << endl;
114
115	// skip last 2 stack frames after main
116	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
117	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
118
119	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
120	if ( *p == '(' ) {
121	mangled_name = p;
122	} else if ( *p == '+' ) {
123	offset_begin = p;
124	} else if ( *p == ')' ) {
125	offset_end = p;
126	break;
127	} // if
128	} // for
129
130	// if line contains symbol, attempt to demangle
131	int frameNo = i - start;
132	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
133	*mangled_name++ = '\0'; // delimit strings
134	*offset_begin++ = '\0';
135	*offset_end++ = '\0';
136
137	int status;
138	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
139	// bug in __cxa_demangle for single-character lower-case non-mangled names
140	if ( status == 0 ) { // demangling successful ?
141	cerr << "(" << frameNo << ") " << messages[i] << " : "
142	<< real_name << "+" << offset_begin << offset_end << endl;
143	} else { // otherwise, output mangled name
144	cerr << "(" << frameNo << ") " << messages[i] << " : "
145	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
146	} // if
147
148	free( real_name );
149	} else { // otherwise, print the whole line
150	cerr << "(" << frameNo << ") " << messages[i] << endl;
151	} // if
152	} // for
153
154	free( messages );
155	} // backtrace
156
157	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
158
159	static void Signal( int sig, void (*handler)(SIGPARMS), int flags ) {
160	struct sigaction act;
161
162	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
163	act.sa_flags = flags;
164
165	if ( sigaction( sig, &act, nullptr ) == -1 ) {
166	cerr << "CFA runtime error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
167	_exit( EXIT_FAILURE );
168	} // if
169	} // Signal
170
171	static void sigSegvBusHandler( SIGPARMS ) {
172	if ( sfp->si_addr == nullptr ) {
173	cerr << "Null pointer (nullptr) dereference." << endl;
174	} else {
175	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
176	<< "Possible cause is reading outside the address space or writing to a protected area within the address space with an invalid pointer or subscript." << endl;
177	} // if
178	backtrace( 2 ); // skip first 2 stack frames
179	abort(); // cause core dump for debugging
180	} // sigSegvBusHandler
181
182	static void sigFpeHandler( SIGPARMS ) {
183	const char * msg;
184
185	switch ( sfp->si_code ) {
186	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
187	case FPE_FLTOVF: msg = "overflow"; break;
188	case FPE_FLTUND: msg = "underflow"; break;
189	case FPE_FLTRES: msg = "inexact result"; break;
190	case FPE_FLTINV: msg = "invalid operation"; break;
191	default: msg = "unknown";
192	} // choose
193	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
194	<< "Possible cause is constant-expression evaluation invalid." << endl;
195	backtrace( 2 ); // skip first 2 stack frames
196	abort(); // cause core dump for debugging
197	} // sigFpeHandler
198
199	static void sigAbortHandler( SIGPARMS ) {
200	backtrace( 6 ); // skip first 6 stack frames
201	Signal( SIGABRT, (void (*)(SIGPARMS))SIG_DFL, SA_SIGINFO ); // reset default signal handler
202	raise( SIGABRT ); // reraise SIGABRT
203	} // sigAbortHandler
204
205	int main( int argc, char * argv[] ) {
206	FILE * input; // use FILE rather than istream because yyin is FILE
207	ostream * output = & cout;
208	list< Declaration * > translationUnit;
209
210	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
211	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
212	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
213	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
214
215	// cout << "main" << endl;
216	// for ( int i = 0; i < argc; i += 1 ) {
217	// cout << '\t' << argv[i] << endl;
218	// } // for
219
220	parse_cmdline( argc, argv ); // process command-line arguments
221	CodeGen::FixMain::setReplaceMain( !nomainp );
222
223	if ( waiting_for_gdb ) {
224	cerr << "Waiting for gdb" << endl;
225	cerr << "run :" << endl;
226	cerr << " gdb attach " << getpid() << endl;
227	raise(SIGSTOP);
228	} // if
229
230	try {
231	// choose to read the program from a file or stdin
232	if ( optind < argc ) { // any commands after the flags ? => input file name
233	input = fopen( argv[ optind ], "r" );
234	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
235	optind += 1;
236	} else { // no input file name
237	input = stdin;
238	} // if
239
240	Stats::Time::StartGlobal();
241	NewPass("Parse");
242	Stats::Time::StartBlock("Parse");
243
244	// read in the builtins, extras, and the prelude
245	if ( ! nopreludep ) { // include gcc builtins
246	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
247
248	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
249
250	// Read to gcc builtins, if not generating the cfa library
251	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
252	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
253	parse( gcc_builtins, LinkageSpec::Compiler );
254
255	// read the extra prelude in, if not generating the cfa library
256	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
257	assertf( extras, "cannot open extras.cf\n" );
258	parse( extras, LinkageSpec::BuiltinC );
259
260	if ( ! libcfap ) {
261	// read the prelude in, if not generating the cfa library
262	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
263	assertf( prelude, "cannot open prelude.cfa\n" );
264	parse( prelude, LinkageSpec::Intrinsic );
265
266	// Read to cfa builtins, if not generating the cfa library
267	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
268	assertf( builtins, "cannot open builtins.cf\n" );
269	parse( builtins, LinkageSpec::BuiltinCFA );
270	} // if
271	} // if
272
273	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
274
275	if ( parsep ) {
276	parseTree->printList( cout );
277	delete parseTree;
278	return EXIT_SUCCESS;
279	} // if
280
281	buildList( parseTree, translationUnit );
282	delete parseTree;
283	parseTree = nullptr;
284
285	if ( astp ) {
286	dump( translationUnit );
287	return EXIT_SUCCESS;
288	} // if
289
290	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
291	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
292	// works okay for now.
293	CodeTools::fillLocations( translationUnit );
294	Stats::Time::StopBlock();
295
296	// add the assignment statement after the initialization of a type parameter
297	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
298	if ( symtabp ) {
299	deleteAll( translationUnit );
300	return EXIT_SUCCESS;
301	} // if
302
303	if ( expraltp ) {
304	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
305	acceptAll( translationUnit, printer );
306	return EXIT_SUCCESS;
307	} // if
308
309	if ( validp ) {
310	dump( translationUnit );
311	return EXIT_SUCCESS;
312	} // if
313
314	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
315	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
316	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
317	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
318	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
319	if ( libcfap ) {
320	// generate the bodies of cfa library functions
321	LibCfa::makeLibCfa( translationUnit );
322	} // if
323
324	if ( declstatsp ) {
325	CodeTools::printDeclStats( translationUnit );
326	deleteAll( translationUnit );
327	return EXIT_SUCCESS;
328	} // if
329
330	if ( bresolvep ) {
331	dump( translationUnit );
332	return EXIT_SUCCESS;
333	} // if
334
335	CodeTools::fillLocations( translationUnit );
336
337	if ( resolvprotop ) {
338	CodeTools::dumpAsResolvProto( translationUnit );
339	return EXIT_SUCCESS;
340	} // if
341
342	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
343	if ( exprp ) {
344	dump( translationUnit );
345	return EXIT_SUCCESS;
346	} // if
347
348	// fix ObjectDecl - replaces ConstructorInit nodes
349	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
350	if ( ctorinitp ) {
351	dump ( translationUnit );
352	return EXIT_SUCCESS;
353	} // if
354
355	PASS( "Expand Unique Expr", Tuples::expandUniqueExpr( translationUnit ) ); // xxx - is this the right place for this? want to expand ASAP so tha, sequent passes don't need to worry about double-visiting a unique expr - needs to go after InitTweak::fix so that copy constructed return declarations are reused
356
357	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
358
359	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
360
361	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
362
363	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
364
365	if ( tuplep ) {
366	dump( translationUnit );
367	return EXIT_SUCCESS;
368	} // if
369
370	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
371
372	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
373	if ( genericsp ) {
374	dump( translationUnit );
375	return EXIT_SUCCESS;
376	} // if
377
378	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
379
380	if ( bboxp ) {
381	dump( translationUnit );
382	return EXIT_SUCCESS;
383	} // if
384	PASS( "Box", GenPoly::box( translationUnit ) );
385
386	if ( bcodegenp ) {
387	dump( translationUnit );
388	return EXIT_SUCCESS;
389	} // if
390
391	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
392	output = new ofstream( argv[ optind ] );
393	} // if
394
395	CodeTools::fillLocations( translationUnit );
396	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
397
398	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
399	if ( output != &cout ) {
400	delete output;
401	} // if
402	} catch ( SemanticErrorException &e ) {
403	if ( errorp ) {
404	cerr << "---AST at error:---" << endl;
405	dump( translationUnit, cerr );
406	cerr << endl << "---End of AST, begin error message:---\n" << endl;
407	} // if
408	e.print();
409	if ( output != &cout ) {
410	delete output;
411	} // if
412	return EXIT_FAILURE;
413	} catch ( UnimplementedError &e ) {
414	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
415	if ( output != &cout ) {
416	delete output;
417	} // if
418	return EXIT_FAILURE;
419	} catch ( CompilerError &e ) {
420	cerr << "Compiler Error: " << e.get_what() << endl;
421	cerr << "(please report bugs to [REDACTED])" << endl;
422	if ( output != &cout ) {
423	delete output;
424	} // if
425	return EXIT_FAILURE;
426	} catch ( ... ) {
427	exception_ptr eptr = current_exception();
428	try {
429	if (eptr) {
430	rethrow_exception(eptr);
431	} else {
432	cerr << "Exception Uncaught and Unknown" << endl;
433	} // if
434	} catch(const exception& e) {
435	cerr << "Uncaught Exception \"" << e.what() << "\"\n";
436	} // try
437	return EXIT_FAILURE;
438	} // try
439
440	deleteAll( translationUnit );
441	Stats::print();
442	return EXIT_SUCCESS;
443	} // main
444
445
446	static const char optstring[] = ":c:ghlLmNnpdP:S:twW:D:";
447
448	enum { PreludeDir = 128 };
449	static struct option long_opts[] = {
450	{ "colors", required_argument, nullptr, 'c' },
451	{ "gdb", no_argument, nullptr, 'g' },
452	{ "help", no_argument, nullptr, 'h' },
453	{ "libcfa", no_argument, nullptr, 'l' },
454	{ "linemarks", no_argument, nullptr, 'L' },
455	{ "no-main", no_argument, 0, 'm' },
456	{ "no-linemarks", no_argument, nullptr, 'N' },
457	{ "no-prelude", no_argument, nullptr, 'n' },
458	{ "prototypes", no_argument, nullptr, 'p' },
459	{ "deterministic-out", no_argument, nullptr, 'd' },
460	{ "print", required_argument, nullptr, 'P' },
461	{ "prelude-dir", required_argument, nullptr, PreludeDir },
462	{ "statistics", required_argument, nullptr, 'S' },
463	{ "tree", no_argument, nullptr, 't' },
464	{ "", no_argument, nullptr, 0 }, // -w
465	{ "", no_argument, nullptr, 0 }, // -W
466	{ "", no_argument, nullptr, 0 }, // -D
467	{ nullptr, 0, nullptr, 0 }
468	}; // long_opts
469
470	static const char * description[] = {
471	"diagnostic color: never, always, or auto.", // -c
472	"wait for gdb to attach", // -g
473	"print help message", // -h
474	"generate libcfa.c", // -l
475	"generate line marks", // -L
476	"do not replace main", // -m
477	"do not generate line marks", // -N
478	"do not read prelude", // -n
479	"generate prototypes for prelude functions", // -p
480	"don't print output that isn't deterministic", // -d
481	"print", // -P
482	"<directory> prelude directory for debug/nodebug", // no flag
483	"<option-list> enable profiling information:\n counters,heap,time,all,none", // -S
484	"building cfa standard lib", // -t
485	"", // -w
486	"", // -W
487	"", // -D
488	}; // description
489
490	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
491
492	static struct Printopts {
493	const char * name;
494	int & flag;
495	int val;
496	const char * descript;
497	} printopts[] = {
498	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
499	{ "asterr", errorp, true, "print AST on error" },
500	{ "declstats", declstatsp, true, "code property statistics" },
501	{ "parse", yydebug, true, "yacc (parsing) debug information" },
502	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
503	{ "rproto", resolvprotop, true, "resolver-proto instance" },
504	{ "rsteps", resolvep, true, "print resolver steps" },
505	{ "tree", parsep, true, "print parse tree" },
506	// code dumps
507	{ "ast", astp, true, "print AST after parsing" },
508	{ "symevt", symtabp, true, "print AST after symbol table events" },
509	{ "altexpr", expraltp, true, "print alternatives for expressions" },
510	{ "astdecl", validp, true, "print AST after declaration validation pass" },
511	{ "resolver", bresolvep, true, "print AST before resolver step" },
512	{ "astexpr", exprp, true, "print AST after expression analysis" },
513	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
514	{ "tuple", tuplep, true, "print AST after tuple expansion" },
515	{ "astgen", genericsp, true, "print AST after instantiate generics" },
516	{ "box", bboxp, true, "print AST before box step" },
517	{ "codegen", bcodegenp, true, "print AST before code generation" },
518	};
519	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
520
521	static void usage( char *argv[] ) {
522	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
523	int i = 0, j = 1; // j skips starting colon
524	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
525	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
526	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
527	cout << " -" << optstring[j] << ",";
528	} else { // no flag
529	j -= 1; // compensate
530	cout << " ";
531	} // if
532	cout << " --" << left << setw(12) << long_opts[i].name << " ";
533	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
534	cout << "one of: " << endl;
535	for ( int i = 0; i < printoptsSize; i += 1 ) {
536	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
537	} // for
538	} else {
539	cout << description[i] << endl;
540	} // if
541	} // if
542	if ( optstring[j + 1] == ':' ) j += 1;
543	} // for
544	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
545	exit( EXIT_FAILURE );
546	} // usage
547
548	static void parse_cmdline( int argc, char * argv[] ) {
549	opterr = 0; // (global) prevent getopt from printing error messages
550
551	bool Wsuppress = false, Werror = false;
552	int c;
553	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
554	switch ( c ) {
555	case 'c': // diagnostic colors
556	if ( strcmp( optarg, "always" ) == 0 ) {
557	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
558	} else if ( strcmp( optarg, "never" ) == 0 ) {
559	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
560	} else if ( strcmp( optarg, "auto" ) == 0 ) {
561	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
562	} // if
563	break;
564	case 'h': // help message
565	usage( argv ); // no return
566	break;
567	case 'l': // generate libcfa.c
568	libcfap = true;
569	break;
570	case 'L': // generate line marks
571	linemarks = true;
572	break;
573	case 'm': // do not replace main
574	nomainp = true;
575	break;
576	case 'N': // do not generate line marks
577	linemarks = false;
578	break;
579	case 'n': // do not read prelude
580	nopreludep = true;
581	break;
582	case 'p': // generate prototypes for prelude functions
583	genproto = true;
584	break;
585	case 'd': // don't print non-deterministic output
586	deterministic_output = true;
587	break;
588	case 'P': // print options
589	for ( int i = 0;; i += 1 ) {
590	if ( i == printoptsSize ) {
591	cout << "Unknown --print option " << optarg << endl;
592	goto Default;
593	} // if
594	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
595	printopts[i].flag = printopts[i].val;
596	break;
597	} // if
598	} // for
599	break;
600	case PreludeDir: // prelude directory for debug/nodebug, hidden
601	PreludeDirector = optarg;
602	break;
603	case 'S': // enable profiling information, argument comma separated list of names
604	Stats::parse_params( optarg );
605	break;
606	case 't': // building cfa stdlib
607	treep = true;
608	break;
609	case 'g': // wait for gdb
610	waiting_for_gdb = true;
611	break;
612	case 'w': // suppress all warnings, hidden
613	Wsuppress = true;
614	break;
615	case 'W': // coordinate gcc -W with CFA, hidden
616	if ( strcmp( optarg, "all" ) == 0 ) {
617	SemanticWarning_EnableAll();
618	} else if ( strcmp( optarg, "error" ) == 0 ) {
619	Werror = true;
620	} else {
621	char * warning = optarg;
622	Severity s;
623	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
624	warning += 3;
625	s = Severity::Suppress;
626	} else {
627	s = Severity::Warn;
628	} // if
629	SemanticWarning_Set( warning, s );
630	} // if
631	break;
632	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
633	break;
634	case '?': // unknown option
635	if ( optopt ) { // short option ?
636	cout << "Unknown option -" << (char)optopt << endl;
637	} else {
638	cout << "Unknown option " << argv[optind - 1] << endl;
639	} // if
640	goto Default;
641	case ':': // missing option
642	if ( optopt ) { // short option ?
643	cout << "Missing option for -" << (char)optopt << endl;
644	} else {
645	cout << "Missing option for " << argv[optind - 1] << endl;
646	} // if
647	goto Default;
648	Default:
649	default:
650	usage( argv ); // no return
651	} // switch
652	} // while
653
654	if ( Werror ) {
655	SemanticWarning_WarningAsError();
656	} // if
657	if ( Wsuppress ) {
658	SemanticWarning_SuppressAll();
659	} // if
660	// for ( const auto w : WarningFormats ) {
661	// cout << w.name << ' ' << (int)w.severity << endl;
662	// } // for
663	} // parse_cmdline
664
665	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
666	extern int yyparse( void );
667	extern FILE * yyin;
668	extern int yylineno;
669
670	::linkage = linkage; // set globals
671	yyin = input;
672	yylineno = 1;
673	int parseStatus = yyparse();
674
675	fclose( input );
676	if ( shouldExit \|\| parseStatus != 0 ) {
677	exit( parseStatus );
678	} // if
679	} // parse
680
681	static bool notPrelude( Declaration * decl ) {
682	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
683	} // notPrelude
684
685	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
686	list< Declaration * > decls;
687
688	if ( genproto ) {
689	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
690	} else {
691	decls = translationUnit;
692	} // if
693
694	// depending on commandline options, either generate code or dump the AST
695	if ( codegenp ) {
696	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
697	} else {
698	printAll( decls, out );
699	} // if
700	deleteAll( translationUnit );
701	} // dump
702
703	// Local Variables: //
704	// tab-width: 4 //
705	// mode: c++ //
706	// compile-command: "make install" //
707	// End: //

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