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source: src/main.cc @ 2a3d446

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

Last change on this file since 2a3d446 was 49d3128, checked in by Thierry Delisle <tdelisle@…>, 5 years ago
cfa command now properly supports -fdiagnostics-color and -fno-diagnostics-color
Property mode set to `100644`
File size: 23.8 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 : Peter A. Buhr
12	// Last Modified On : Fri Aug 23 06:50:08 2019
13	// Update Count : 607
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	#include "CompilationState.h"
32	#include "../config.h" // for CFA_LIBDIR
33	#include "CodeGen/FixMain.h" // for FixMain
34	#include "CodeGen/FixNames.h" // for fixNames
35	#include "CodeGen/Generate.h" // for generate
36	#include "CodeTools/DeclStats.h" // for printDeclStats
37	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
38	#include "CodeTools/TrackLoc.h" // for fillLocations
39	#include "Common/CompilerError.h" // for CompilerError
40	#include "Common/Stats.h"
41	#include "Common/PassVisitor.h"
42	#include "Common/SemanticError.h" // for SemanticError
43	#include "Common/UnimplementedError.h" // for UnimplementedError
44	#include "Common/utility.h" // for deleteAll, filter, printAll
45	#include "Concurrency/Waitfor.h" // for generateWaitfor
46	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
47	#include "ControlStruct/Mutate.h" // for mutate
48	#include "GenPoly/Box.h" // for box
49	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
50	#include "GenPoly/Lvalue.h" // for convertLvalue
51	#include "GenPoly/Specialize.h" // for convertSpecializations
52	#include "InitTweak/FixInit.h" // for fix
53	#include "InitTweak/GenInit.h" // for genInit
54	#include "MakeLibCfa.h" // for makeLibCfa
55	#include "Parser/LinkageSpec.h" // for Spec, Cforall, Intrinsic
56	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
57	#include "Parser/TypedefTable.h" // for TypedefTable
58	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
59	#include "ResolvExpr/Resolver.h" // for resolve
60	#include "SymTab/Validate.h" // for validate
61	#include "SynTree/Declaration.h" // for Declaration
62	#include "SynTree/Visitor.h" // for acceptAll
63	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
64	#include "Virtual/ExpandCasts.h" // for expandCasts
65
66
67	using namespace std;
68
69	static void NewPass( const char * const name ) {
70	Stats::Heap::newPass( name );
71	using namespace Stats::Counters;
72	{
73	static auto group = build<CounterGroup>( "Pass Visitor" );
74	auto pass = build<CounterGroup>( name, group );
75	pass_visitor_stats.depth = 0;
76	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
77	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
78	}
79	{
80	static auto group = build<CounterGroup>( "Syntax Node" );
81	auto pass = build<CounterGroup>( name, group );
82	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
83	}
84	}
85
86	#define PASS( name, pass ) \
87	if ( errorp ) { cerr << name << endl; } \
88	NewPass(name); \
89	Stats::Time::StartBlock(name); \
90	pass; \
91	Stats::Time::StopBlock();
92
93	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
94	TypedefTable typedefTable;
95	DeclarationNode * parseTree = nullptr; // program parse tree
96
97	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
98
99	static std::string PreludeDirector = "";
100
101	static void parse_cmdline( int argc, char *argv[] );
102	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
103	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
104
105	static void backtrace( int start ) { // skip first N stack frames
106	enum { Frames = 50 };
107	void * array[Frames];
108	int size = ::backtrace( array, Frames );
109	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
110
111	*index( messages[0], '(' ) = '\0'; // find executable name
112	cerr << "Stack back trace for: " << messages[0] << endl;
113
114	// skip last 2 stack frames after main
115	for ( int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
116	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
117	for ( char p = messages[i]; p; ++p ) { // find parantheses and +offset
118	if ( *p == '(' ) {
119	mangled_name = p;
120	} else if ( *p == '+' ) {
121	offset_begin = p;
122	} else if ( *p == ')' ) {
123	offset_end = p;
124	break;
125	} // if
126	} // for
127
128	// if line contains symbol, attempt to demangle
129	int frameNo = i - start;
130	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
131	*mangled_name++ = '\0'; // delimit strings
132	*offset_begin++ = '\0';
133	*offset_end++ = '\0';
134
135	int status;
136	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
137	// bug in __cxa_demangle for single-character lower-case non-mangled names
138	if ( status == 0 ) { // demangling successful ?
139	cerr << "(" << frameNo << ") " << messages[i] << " : "
140	<< real_name << "+" << offset_begin << offset_end << endl;
141	} else { // otherwise, output mangled name
142	cerr << "(" << frameNo << ") " << messages[i] << " : "
143	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
144	} // if
145
146	free( real_name );
147	} else { // otherwise, print the whole line
148	cerr << "(" << frameNo << ") " << messages[i] << endl;
149	} // if
150	} // for
151
152	free( messages );
153	} // backtrace
154
155	static void sigSegvBusHandler( int sig_num ) {
156	cerr << "CFA runtime error program cfa-cpp terminated with "
157	<< (sig_num == SIGSEGV ? "segment fault" : "bus error")
158	<< "." << endl;
159	backtrace( 2 ); // skip first 2 stack frames
160	//_exit( EXIT_FAILURE );
161	abort(); // cause core dump for debugging
162	} // sigSegvBusHandler
163
164	static void sigAbortHandler( __attribute__((unused)) int sig_num ) {
165	backtrace( 6 ); // skip first 6 stack frames
166	signal( SIGABRT, SIG_DFL); // reset default signal handler
167	raise( SIGABRT ); // reraise SIGABRT
168	} // sigAbortHandler
169
170	int main( int argc, char * argv[] ) {
171	FILE * input; // use FILE rather than istream because yyin is FILE
172	ostream * output = & cout;
173	list< Declaration * > translationUnit;
174
175	signal( SIGSEGV, sigSegvBusHandler );
176	signal( SIGBUS, sigSegvBusHandler );
177	signal( SIGABRT, sigAbortHandler );
178
179	// std::cout << "main" << std::endl;
180	// for ( int i = 0; i < argc; i += 1 ) {
181	// std::cout << '\t' << argv[i] << std::endl;
182	// } // for
183
184	parse_cmdline( argc, argv ); // process command-line arguments
185	CodeGen::FixMain::setReplaceMain( !nomainp );
186
187	if ( waiting_for_gdb ) {
188	std::cerr << "Waiting for gdb" << std::endl;
189	std::cerr << "run :" << std::endl;
190	std::cerr << " gdb attach " << getpid() << std::endl;
191	raise(SIGSTOP);
192	} // if
193
194	try {
195	// choose to read the program from a file or stdin
196	if ( optind < argc ) { // any commands after the flags ? => input file name
197	input = fopen( argv[ optind ], "r" );
198	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
199	optind += 1;
200	} else { // no input file name
201	input = stdin;
202	} // if
203
204	Stats::Time::StartGlobal();
205	NewPass("Parse");
206	Stats::Time::StartBlock("Parse");
207
208	// read in the builtins, extras, and the prelude
209	if ( ! nopreludep ) { // include gcc builtins
210	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
211
212	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
213
214	// Read to gcc builtins, if not generating the cfa library
215	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
216	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
217	parse( gcc_builtins, LinkageSpec::Compiler );
218
219	// read the extra prelude in, if not generating the cfa library
220	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
221	assertf( extras, "cannot open extras.cf\n" );
222	parse( extras, LinkageSpec::BuiltinC );
223
224	if ( ! libcfap ) {
225	// read the prelude in, if not generating the cfa library
226	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
227	assertf( prelude, "cannot open prelude.cfa\n" );
228	parse( prelude, LinkageSpec::Intrinsic );
229
230	// Read to cfa builtins, if not generating the cfa library
231	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
232	assertf( builtins, "cannot open builtins.cf\n" );
233	parse( builtins, LinkageSpec::BuiltinCFA );
234	} // if
235	} // if
236
237	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
238
239	if ( parsep ) {
240	parseTree->printList( cout );
241	delete parseTree;
242	return EXIT_SUCCESS;
243	} // if
244
245	buildList( parseTree, translationUnit );
246	delete parseTree;
247	parseTree = nullptr;
248
249	if ( astp ) {
250	dump( translationUnit );
251	return EXIT_SUCCESS;
252	} // if
253
254	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
255	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
256	// works okay for now.
257	CodeTools::fillLocations( translationUnit );
258	Stats::Time::StopBlock();
259
260	// add the assignment statement after the initialization of a type parameter
261	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
262	if ( symtabp ) {
263	deleteAll( translationUnit );
264	return EXIT_SUCCESS;
265	} // if
266
267	if ( expraltp ) {
268	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
269	acceptAll( translationUnit, printer );
270	return EXIT_SUCCESS;
271	} // if
272
273	if ( validp ) {
274	dump( translationUnit );
275	return EXIT_SUCCESS;
276	} // if
277
278	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
279	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
280	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
281	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
282	if ( libcfap ) {
283	// generate the bodies of cfa library functions
284	LibCfa::makeLibCfa( translationUnit );
285	} // if
286
287	if ( declstatsp ) {
288	CodeTools::printDeclStats( translationUnit );
289	deleteAll( translationUnit );
290	return EXIT_SUCCESS;
291	} // if
292
293	if ( bresolvep ) {
294	dump( translationUnit );
295	return EXIT_SUCCESS;
296	} // if
297
298	CodeTools::fillLocations( translationUnit );
299
300	if ( resolvprotop ) {
301	CodeTools::dumpAsResolvProto( translationUnit );
302	return EXIT_SUCCESS;
303	} // if
304
305	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
306	if ( exprp ) {
307	dump( translationUnit );
308	return EXIT_SUCCESS;
309	} // if
310
311	// fix ObjectDecl - replaces ConstructorInit nodes
312	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
313	if ( ctorinitp ) {
314	dump ( translationUnit );
315	return EXIT_SUCCESS;
316	} // if
317
318	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
319
320	PASS( "Translate EHM" , ControlStruct::translateEHM( translationUnit ) );
321
322	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
323
324	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
325
326	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
327
328	if ( tuplep ) {
329	dump( translationUnit );
330	return EXIT_SUCCESS;
331	} // if
332
333	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
334
335	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
336	if ( genericsp ) {
337	dump( translationUnit );
338	return EXIT_SUCCESS;
339	} // if
340
341	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
342
343	if ( bboxp ) {
344	dump( translationUnit );
345	return EXIT_SUCCESS;
346	} // if
347	PASS( "Box", GenPoly::box( translationUnit ) );
348
349	if ( bcodegenp ) {
350	dump( translationUnit );
351	return EXIT_SUCCESS;
352	} // if
353
354	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
355	output = new ofstream( argv[ optind ] );
356	} // if
357
358	CodeTools::fillLocations( translationUnit );
359	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
360
361	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
362	if ( output != &cout ) {
363	delete output;
364	} // if
365	} catch ( SemanticErrorException &e ) {
366	if ( errorp ) {
367	cerr << "---AST at error:---" << endl;
368	dump( translationUnit, cerr );
369	cerr << endl << "---End of AST, begin error message:---\n" << endl;
370	} // if
371	e.print();
372	if ( output != &cout ) {
373	delete output;
374	} // if
375	return EXIT_FAILURE;
376	} catch ( UnimplementedError &e ) {
377	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
378	if ( output != &cout ) {
379	delete output;
380	} // if
381	return EXIT_FAILURE;
382	} catch ( CompilerError &e ) {
383	cerr << "Compiler Error: " << e.get_what() << endl;
384	cerr << "(please report bugs to [REDACTED])" << endl;
385	if ( output != &cout ) {
386	delete output;
387	} // if
388	return EXIT_FAILURE;
389	} catch ( ... ) {
390	std::exception_ptr eptr = std::current_exception();
391	try {
392	if (eptr) {
393	std::rethrow_exception(eptr);
394	} else {
395	std::cerr << "Exception Uncaught and Unknown" << std::endl;
396	} // if
397	} catch(const std::exception& e) {
398	std::cerr << "Uncaught Exception \"" << e.what() << "\"\n";
399	} // try
400	return EXIT_FAILURE;
401	} // try
402
403	deleteAll( translationUnit );
404	Stats::print();
405	return EXIT_SUCCESS;
406	} // main
407
408
409	static const char optstring[] = ":c:ghlLmNnpP:S:twW:D:";
410
411	enum { PreludeDir = 128 };
412	static struct option long_opts[] = {
413	{ "colors", required_argument, nullptr, 'c' },
414	{ "gdb", no_argument, nullptr, 'g' },
415	{ "help", no_argument, nullptr, 'h' },
416	{ "libcfa", no_argument, nullptr, 'l' },
417	{ "linemarks", no_argument, nullptr, 'L' },
418	{ "no-main", no_argument, 0, 'm' },
419	{ "no-linemarks", no_argument, nullptr, 'N' },
420	{ "no-prelude", no_argument, nullptr, 'n' },
421	{ "prototypes", no_argument, nullptr, 'p' },
422	{ "print", required_argument, nullptr, 'P' },
423	{ "prelude-dir", required_argument, nullptr, PreludeDir },
424	{ "statistics", required_argument, nullptr, 'S' },
425	{ "tree", no_argument, nullptr, 't' },
426	{ "", no_argument, nullptr, 0 }, // -w
427	{ "", no_argument, nullptr, 0 }, // -W
428	{ "", no_argument, nullptr, 0 }, // -D
429	{ nullptr, 0, nullptr, 0 }
430	}; // long_opts
431
432	static const char * description[] = {
433	"diagnostic color: never, always, or auto.", // -c
434	"wait for gdb to attach", // -g
435	"print help message", // -h
436	"generate libcfa.c", // -l
437	"generate line marks", // -L
438	"do not replace main", // -m
439	"do not generate line marks", // -N
440	"do not read prelude", // -n
441	"generate prototypes for prelude functions", // -p
442	"print", // -P
443	"<directory> prelude directory for debug/nodebug", // no flag
444	"<option-list> enable profiling information:\n counters,heap,time,all,none", // -S
445	"building cfa standard lib", // -t
446	"", // -w
447	"", // -W
448	"", // -D
449	}; // description
450
451	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
452
453	static struct Printopts {
454	const char * name;
455	int & flag;
456	int val;
457	const char * descript;
458	} printopts[] = {
459	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
460	{ "asterr", errorp, true, "print AST on error" },
461	{ "declstats", declstatsp, true, "code property statistics" },
462	{ "parse", yydebug, true, "yacc (parsing) debug information" },
463	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
464	{ "rproto", resolvprotop, true, "resolver-proto instance" },
465	{ "rsteps", resolvep, true, "print resolver steps" },
466	{ "tree", parsep, true, "print parse tree" },
467	// code dumps
468	{ "ast", astp, true, "print AST after parsing" },
469	{ "symevt", symtabp, true, "print AST after symbol table events" },
470	{ "altexpr", expraltp, true, "print alternatives for expressions" },
471	{ "astdecl", validp, true, "print AST after declaration validation pass" },
472	{ "resolver", bresolvep, true, "print AST before resolver step" },
473	{ "astexpr", exprp, true, "print AST after expression analysis" },
474	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
475	{ "tuple", tuplep, true, "print AST after tuple expansion" },
476	{ "astgen", genericsp, true, "print AST after instantiate generics" },
477	{ "box", bboxp, true, "print AST before box step" },
478	{ "codegen", bcodegenp, true, "print AST before code generation" },
479	};
480	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
481
482	static void usage( char *argv[] ) {
483	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
484	int i = 0, j = 1; // j skips starting colon
485	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
486	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
487	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
488	cout << " -" << optstring[j] << ",";
489	} else { // no flag
490	j -= 1; // compensate
491	cout << " ";
492	} // if
493	cout << " --" << left << setw(12) << long_opts[i].name << " ";
494	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
495	cout << "one of: " << endl;
496	for ( int i = 0; i < printoptsSize; i += 1 ) {
497	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
498	} // for
499	} else {
500	cout << description[i] << endl;
501	} // if
502	} // if
503	if ( optstring[j + 1] == ':' ) j += 1;
504	} // for
505	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
506	exit( EXIT_FAILURE );
507	} // usage
508
509	static void parse_cmdline( int argc, char * argv[] ) {
510	opterr = 0; // (global) prevent getopt from printing error messages
511
512	bool Wsuppress = false, Werror = false;
513	int c;
514	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
515	switch ( c ) {
516	case 'c': // diagnostic colors
517	if ( strcmp( optarg, "always" ) == 0 ) {
518	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
519	} else if ( strcmp( optarg, "never" ) == 0 ) {
520	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
521	} else if ( strcmp( optarg, "auto" ) == 0 ) {
522	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
523	} // if
524	break;
525	case 'h': // help message
526	usage( argv ); // no return
527	break;
528	case 'l': // generate libcfa.c
529	libcfap = true;
530	break;
531	case 'L': // generate line marks
532	linemarks = true;
533	break;
534	case 'm': // do not replace main
535	nomainp = true;
536	break;
537	case 'N': // do not generate line marks
538	linemarks = false;
539	break;
540	case 'n': // do not read prelude
541	nopreludep = true;
542	break;
543	case 'p': // generate prototypes for prelude functions
544	genproto = true;
545	break;
546	case 'P': // print options
547	for ( int i = 0;; i += 1 ) {
548	if ( i == printoptsSize ) {
549	cout << "Unknown --print option " << optarg << endl;
550	goto Default;
551	} // if
552	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
553	printopts[i].flag = printopts[i].val;
554	break;
555	} // if
556	} // for
557	break;
558	case PreludeDir: // prelude directory for debug/nodebug, hidden
559	PreludeDirector = optarg;
560	break;
561	case 'S': // enable profiling information, argument comma separated list of names
562	Stats::parse_params( optarg );
563	break;
564	case 't': // building cfa stdlib
565	treep = true;
566	break;
567	case 'g': // wait for gdb
568	waiting_for_gdb = true;
569	break;
570	case 'w': // suppress all warnings, hidden
571	Wsuppress = true;
572	break;
573	case 'W': // coordinate gcc -W with CFA, hidden
574	if ( strcmp( optarg, "all" ) == 0 ) {
575	SemanticWarning_EnableAll();
576	} else if ( strcmp( optarg, "error" ) == 0 ) {
577	Werror = true;
578	} else {
579	char * warning = optarg;
580	Severity s;
581	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
582	warning += 3;
583	s = Severity::Suppress;
584	} else {
585	s = Severity::Warn;
586	} // if
587	SemanticWarning_Set( warning, s );
588	} // if
589	break;
590	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
591	break;
592	case '?': // unknown option
593	if ( optopt ) { // short option ?
594	cout << "Unknown option -" << (char)optopt << endl;
595	} else {
596	cout << "Unknown option " << argv[optind - 1] << endl;
597	} // if
598	goto Default;
599	case ':': // missing option
600	if ( optopt ) { // short option ?
601	cout << "Missing option for -" << (char)optopt << endl;
602	} else {
603	cout << "Missing option for " << argv[optind - 1] << endl;
604	} // if
605	goto Default;
606	Default:
607	default:
608	usage( argv ); // no return
609	} // switch
610	} // while
611
612	if ( Werror ) {
613	SemanticWarning_WarningAsError();
614	} // if
615	if ( Wsuppress ) {
616	SemanticWarning_SuppressAll();
617	} // if
618	// for ( const auto w : WarningFormats ) {
619	// cout << w.name << ' ' << (int)w.severity << endl;
620	// } // for
621	} // parse_cmdline
622
623	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
624	extern int yyparse( void );
625	extern FILE * yyin;
626	extern int yylineno;
627
628	::linkage = linkage; // set globals
629	yyin = input;
630	yylineno = 1;
631	int parseStatus = yyparse();
632
633	fclose( input );
634	if ( shouldExit \|\| parseStatus != 0 ) {
635	exit( parseStatus );
636	} // if
637	} // parse
638
639	static bool notPrelude( Declaration * decl ) {
640	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
641	} // notPrelude
642
643	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
644	list< Declaration * > decls;
645
646	if ( genproto ) {
647	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
648	} else {
649	decls = translationUnit;
650	} // if
651
652	// depending on commandline options, either generate code or dump the AST
653	if ( codegenp ) {
654	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
655	} else {
656	printAll( decls, out );
657	} // if
658	deleteAll( translationUnit );
659	} // dump
660
661	// Local Variables: //
662	// tab-width: 4 //
663	// mode: c++ //
664	// compile-command: "make install" //
665	// End: //

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