AUTOGEN_PARSEOPT = src/conf/parse_opts.cc
AUTOGEN_PARSER = src/ast/parser.cc
AUTOGEN_PARSER_HDR = src/ast/y.tab.h
+AUTOGEN_HELP = src/conf/help.cc
AUTOGEN = \
$(AUTOGEN_LEX) \
$(AUTOGEN_LEX_CONF) \
$(AUTOGEN_PARSER) \
$(AUTOGEN_PARSER_HDR) \
- $(AUTOGEN_PARSEOPT)
+ $(AUTOGEN_PARSEOPT)\
+ $(AUTOGEN_HELP)
nodist_re2c_SOURCES = $(AUTOGEN)
# bootstrap sources
BOOTSTRAP_PARSER = bootstrap/src/ast/parser.cc
BOOTSTRAP_PARSER_HDR = bootstrap/src/ast/y.tab.h
BOOTSTRAP_DOC = bootstrap/doc/re2c.1
+BOOTSTRAP_HELP = bootstrap/src/conf/help.cc
BOOTSTRAP = \
$(BOOTSTRAP_LEX) \
$(BOOTSTRAP_LEX_CONF) \
$(BOOTSTRAP_DOC) \
+ $(BOOTSTRAP_HELP) \
$(BOOTSTRAP_PARSER) \
$(BOOTSTRAP_PARSER_HDR) \
$(BOOTSTRAP_PARSEOPT)
CUSTOM_LEX_CONF = src/ast/lex_conf.re
CUSTOM_PARSEOPT = src/conf/parse_opts.re
CUSTOM_PARSER = src/ast/parser.ypp
+CUSTOM_HELP = doc/help.rst
CUSTOM = \
$(CUSTOM_LEX) \
$(CUSTOM_LEX_CONF) \
$(CUSTOM_PARSER) \
- $(CUSTOM_PARSEOPT)
+ $(CUSTOM_PARSEOPT) \
+ $(CUSTOM_HELP)
# docs
SRC_DOC = doc/manpage.rst
.PHONY: docs
if REBUILD_DOCS
-docs: $(DOC)
+docs: $(DOC) $(AUTOGEN_HELP)
$(DOC): $(SRC_DOC)
$(RST2MAN) $(top_builddir)/$(SRC_DOC) > $@
cp $@ $(top_srcdir)/$(BOOTSTRAP_DOC)
+$(AUTOGEN_HELP): $(CUSTOM_HELP)
+ $(RST2MAN) $(top_builddir)/$(CUSTOM_HELP) > $@.1
+ $(top_srcdir)/genhelp.sh $@.1 $@
+ cp $@ $(top_srcdir)/$(BOOTSTRAP_HELP)
else
-docs: $(DOC)
+docs: $(DOC) $(AUTOGEN_HELP)
@echo "Reconfigure to rebuild docs: ./configure --enable-docs"
$(DOC): $(BOOTSTRAP_DOC)
cp $(top_srcdir)/$(BOOTSTRAP_DOC) $@
+$(AUTOGEN_HELP): $(BOOTSTRAP_HELP)
+ cp $(top_srcdir)/$(BOOTSTRAP_HELP) $@
endif
all-local: docs $(BOOTSTRAP_PARSER)
--- /dev/null
+const char *help =
+"\n"
+" -? -h --help\n"
+" Show a short help screen:\n"
+"\n"
+" -b --bit-vectors\n"
+" Implies -s. Use bit vectors as well to try to coax better code\n"
+" out of the compiler. Most useful for specifications with more\n"
+" than a few keywords (e.g., for most programming languages).\n"
+"\n"
+" -c --conditions\n"
+" Used for (f)lex-like condition support.\n"
+"\n"
+" -d --debug-output\n"
+" Creates a parser that dumps information about the current posi‐\n"
+" tion and the state the parser is in. This is useful for debug‐\n"
+" ging parser issues and states. If you use this switch, you need\n"
+" to define a YYDEBUG macro, which will be called like a function\n"
+" with two parameters: void YYDEBUG (int state, char current).\n"
+" The first parameter receives the state or -1 and the second\n"
+" parameter receives the input at the current cursor.\n"
+"\n"
+" -D --emit-dot\n"
+" Emit Graphviz dot data, which can then be processed with e.g.,\n"
+" dot -Tpng input.dot > output.png. Please note that scanners with\n"
+" many states may crash dot.\n"
+"\n"
+" -e --ecb\n"
+" Generate a parser that supports EBCDIC. The generated code can\n"
+" deal with any character up to 0xFF. In this mode, re2c assumes\n"
+" an input character size of 1 byte. This switch is incompatible\n"
+" with -w, -x, -u, and -8.\n"
+"\n"
+" -f --storable-state\n"
+" Generate a scanner with support for storable state.\n"
+"\n"
+" -F --flex-syntax\n"
+" Partial support for flex syntax. When this flag is active, named\n"
+" definitions must be surrounded by curly braces and can be\n"
+" defined without an equal sign and the terminating semicolon.\n"
+" Instead, names are treated as direct double quoted strings.\n"
+"\n"
+" -g --computed-gotos\n"
+" Generate a scanner that utilizes GCC's computed-goto feature.\n"
+" That is, re2c generates jump tables whenever a decision is of\n"
+" certain complexity (e.g., a lot of if conditions would be other‐\n"
+" wise necessary). This is only usable with compilers that support\n"
+" this feature. Note that this implies -b and that the complexity\n"
+" threshold can be configured using the cgoto:threshold inplace\n"
+" configuration.\n"
+"\n"
+" -i --no-debug-info\n"
+" Do not output #line information. This is useful when you want\n"
+" use a CMS tool with re2c's output. You might want to do this if\n"
+" you do not want to impose re2c as a build requirement for your\n"
+" source.\n"
+"\n"
+" -o OUTPUT --output=OUTPUT\n"
+" Specify the OUTPUT file.\n"
+"\n"
+" -r --reusable\n"
+" Allows reuse of scanner definitions with /*!use:re2c */ after\n"
+" /*!rules:re2c */. In this mode, no /*!re2c */ block and exactly\n"
+" one /*!rules:re2c */ must be present. The rules are saved and\n"
+" used by every /*!use:re2c */ block that follows. These blocks\n"
+" can contain inplace configurations, especially re2c:flags:e,\n"
+" re2c:flags:w, re2c:flags:x, re2c:flags:u, and re2c:flags:8.\n"
+" That way it is possible to create the same scanner multiple\n"
+" times for different character types, different input mechanisms,\n"
+" or different output mechanisms. The /*!use:re2c */ blocks can\n"
+" also contain additional rules that will be appended to the set\n"
+" of rules in /*!rules:re2c */.\n"
+"\n"
+" -s --nested-ifs\n"
+" Generate nested ifs for some switches. Many compilers need this\n"
+" assist to generate better code.\n"
+"\n"
+" -t HEADER --type-header=HEADER\n"
+" Create a HEADER file that contains types for the (f)lex-like\n"
+" condition support. This can only be activated when -c is in use.\n"
+"\n"
+" -u --unicode\n"
+" Generate a parser that supports UTF-32. The generated code can\n"
+" deal with any valid Unicode character up to 0x10FFFF. In this\n"
+" mode, re2c assumes an input character size of 4 bytes. This\n"
+" switch is incompatible with -e, -w, -x, and -8. This implies -s.\n"
+"\n"
+" -v --version\n"
+" Show version information.\n"
+"\n"
+" -V --vernum\n"
+" Show the version as a number in the MMmmpp (Majorm, minor,\n"
+" patch) format.\n"
+"\n"
+" -w --wide-chars\n"
+" Generate a parser that supports UCS-2. The generated code can\n"
+" deal with any valid Unicode character up to 0xFFFF. In this\n"
+" mode, re2c assumes an input character size of 2 bytes. This\n"
+" switch is incompatible with -e, -x, -u, and -8. This implies -s.\n"
+"\n"
+" -x --utf-16\n"
+" Generate a parser that supports UTF-16. The generated code can\n"
+" deal with any valid Unicode character up to 0x10FFFF. In this\n"
+" mode, re2c assumes an input character size of 2 bytes. This\n"
+" switch is incompatible with -e, -w, -u, and -8. This implies -s.\n"
+"\n"
+" -8 --utf-8\n"
+" Generate a parser that supports UTF-8. The generated code can\n"
+" deal with any valid Unicode character up to 0x10FFFF. In this\n"
+" mode, re2c assumes an input character size of 1 byte. This\n"
+" switch is incompatible with -e, -w, -x, and -u.\n"
+"\n"
+" --case-insensitive\n"
+" Makes all strings case insensitive. This makes \"-quoted expres‐\n"
+" sions behave as '-quoted expressions.\n"
+"\n"
+" --case-inverted\n"
+" Invert the meaning of single and double quoted strings. With\n"
+" this switch, single quotes are case sensitive and double quotes\n"
+" are case insensitive.\n"
+"\n"
+" --no-generation-date\n"
+" Suppress date output in the generated file.\n"
+"\n"
+" --no-version\n"
+" Suppress version output in the generated file.\n"
+"\n"
+" --no-generation-date\n"
+" Suppress version output in the generated file.\n"
+"\n"
+" --encoding-policy POLICY\n"
+" Specify how re2c must treat Unicode surrogates. POLICY can be\n"
+" one of the following: fail (abort with an error when a surrogate\n"
+" is encountered), substitute (silently replace surrogates with\n"
+" the error code point 0xFFFD), ignore (treat surrogates as normal\n"
+" code points). By default, re2c ignores surrogates (for backward\n"
+" compatibility). The Unicode standard says that standalone surro‐\n"
+" gates are invalid code points, but different libraries and pro‐\n"
+" grams treat them differently.\n"
+"\n"
+" --input INPUT\n"
+" Specify re2c's input API. INPUT can be either default or custom.\n"
+"\n"
+" -S --skeleton\n"
+" Instead of embedding re2c-generated code into C/C++ source, gen‐\n"
+" erate a self-contained program for the same DFA. Most useful for\n"
+" correctness and performance testing.\n"
+"\n"
+" --empty-class POLICY\n"
+" What to do if the user uses an empty character class. POLICY can\n"
+" be one of the following: match-empty (match empty input: pretty\n"
+" illogical, but this is the default for backwards compatibility\n"
+" reasons), match-none (fail to match on any input), error (compi‐\n"
+" lation error). Note that there are various ways to construct an\n"
+" empty class, e.g., [], [^\\x00-\\xFF], [\\x00-\\xFF][\\x00-\\xFF].\n"
+"\n"
+" --dfa-minimization <table | moore>\n"
+" The internal algorithm used by re2c to minimize the DFA\n"
+" (defaults to moore). Both the table filling algorithm and the\n"
+" Moore algorithm should produce the same DFA (up to states rela‐\n"
+" beling). The table filling algorithm is much simpler and\n"
+" slower; it serves as a reference implementation.\n"
+"\n"
+" -1 --single-pass\n"
+" Deprecated. Does nothing (single pass is the default now).\n"
+"\n"
+" -W Turn on all warnings.\n"
+"\n"
+" -Werror\n"
+" Turn warnings into errors. Note that this option alone doesn't\n"
+" turn on any warnings; it only affects those warnings that have\n"
+" been turned on so far or will be turned on later.\n"
+"\n"
+" -W<warning>\n"
+" Turn on a warning.\n"
+"\n"
+" -Wno-<warning>\n"
+" Turn off a warning.\n"
+"\n"
+" -Werror-<warning>\n"
+" Turn on a warning and treat it as an error (this implies\n"
+" -W<warning>).\n"
+"\n"
+" -Wno-error-<warning>\n"
+" Don't treat this particular warning as an error. This doesn't\n"
+" turn off the warning itself.\n"
+"\n"
+" -Wcondition-order\n"
+" Warn if the generated program makes implicit assumptions about\n"
+" condition numbering. You should use either the -t, --type-header\n"
+" option or the /*!types:re2c*/ directive to generate a mapping of\n"
+" condition names to numbers and then use the autogenerated condi‐\n"
+" tion names.\n"
+"\n"
+" -Wempty-character-class\n"
+" Warn if a regular expression contains an empty character class.\n"
+" Rationally, trying to match an empty character class makes no\n"
+" sense: it should always fail. However, for backwards compatibil‐\n"
+" ity reasons, re2c allows empty character classes and treats them\n"
+" as empty strings. Use the --empty-class option to change the\n"
+" default behavior.\n"
+"\n"
+" -Wmatch-empty-string\n"
+" Warn if a regular expression in a rule is nullable (matches an\n"
+" empty string). If the DFA runs in a loop and an empty match is\n"
+" unintentional (the input position in not advanced manually), the\n"
+" lexer may get stuck in an infinite loop.\n"
+"\n"
+" -Wswapped-range\n"
+" Warn if the lower bound of a range is greater than its upper\n"
+" bound. The default behavior is to silently swap the range\n"
+" bounds.\n"
+"\n"
+" -Wundefined-control-flow\n"
+" Warn if some input strings cause undefined control flow in the\n"
+" lexer (the faulty patterns are reported). This is the most dan‐\n"
+" gerous and most common mistake. It can be easily fixed by adding\n"
+" the default rule (*) (this rule has the lowest priority, matches\n"
+" any code unit, and consumes exactly one code unit).\n"
+"\n"
+" -Wunreachable-rules\n"
+" Warn about rules that are shadowed by other rules and will never\n"
+" match.\n"
+"\n"
+" -Wuseless-escape\n"
+" Warn if a symbol is escaped when it shouldn't be. By default,\n"
+" re2c silently ignores such escapes, but this may as well indi‐\n"
+" cate a typo or error in the escape sequence.\n"
+"\n"
+;
AC_CONFIG_FILES([\
Makefile \
doc/manpage.rst \
+ doc/help.rst \
])
AC_CONFIG_FILES([run_tests.sh], [chmod +x run_tests.sh])
--- /dev/null
+.. include:: @top_srcdir@/doc/manual/options/options_list.rst
+
+.. include:: @top_srcdir@/doc/manual/warnings/warnings_general.rst
+
+.. include:: @top_srcdir@/doc/manual/warnings/warnings_list.rst
--- /dev/null
+
+echo "const char *help =" > "$2"
+PAGER=cat man "$1" \
+ | tail -n +7 \
+ | head -n -3 \
+ | sed -E -e 's/\x1b\x5b[0-9]+m//g' \
+ | sed 's/\\x/\\\\x/g' \
+ | sed -E 's/"/\\"/g' \
+ | sed -E 's/(.*)/"\1\\n"/' \
+ >> "$2"
+echo ";" >> "$2"
#include "config.h"
#include "src/conf/msg.h"
+extern const char *help; // autogenerated
+
namespace re2c {
void error (const char * fmt, ...)
warning_end (type, error);
}
-void usage ()
+void usage()
{
- fprintf (stdout,
- "usage: re2c [-bcdDefFghirsuvVwx18] [-o of] [-t th] file\n"
- /* MANWIDTH=88 PAGER=cat man re2c | sed -n '/^OPTIONS/,/^INTERFACE/ p' |tail -n+2|head -n-1|sed 's/ //' |
- c_doublequote */
-"\n"
-"-? -h --help\n"
-" Display this info\n"
-"\n"
-"-b --bit-vectors\n"
-" Implies -s. Use bit vectors as well to try to coax better code out of\n"
-" the compiler. Most useful for specifications with more than a few key\xe2\x80\x90\n"
-" words (e.g., for most programming languages).\n"
-"\n"
-"-c --conditions\n"
-" Used for (f)lex-like condition support.\n"
-"\n"
-"-d --debug-output\n"
-" Creates a parser that dumps information about the current position and\n"
-" the state the parser is in. This is useful for debugging parser issues\n"
-" and states. If you use this switch, you need to define a YYDEBUG macro,\n"
-" which will be called like a function with two parameters: void YYDEBUG\n"
-" (int state, char current). The first parameter receives the state or\n"
-" -1 and the second parameter receives the input at the current cursor.\n"
-"\n"
-"-D --emit-dot\n"
-" Emit Graphviz dot data, which can then be processed with e.g., dot\n"
-" -Tpng input.dot > output.png. Please note that scanners with many\n"
-" states may crash dot.\n"
-"\n"
-"-e --ecb\n"
-" Generate a parser that supports EBCDIC. The generated code can deal\n"
-" with any character up to 0xFF. In this mode, re2c assumes an input\n"
-" character size of 1 byte. This switch is incompatible with -w, -x, -u,\n"
-" and -8.\n"
-"\n"
-"-f --storable-state\n"
-" Generate a scanner with support for storable state.\n"
-"\n"
-"-F --flex-syntax\n"
-" Partial support for flex syntax. When this flag is active, named defi\xe2\x80\x90\n"
-" nitions must be surrounded by curly braces and can be defined without\n"
-" an equal sign and the terminating semicolon. Instead, names are\n"
-" treated as direct double quoted strings.\n"
-"\n"
-"-g --computed-gotos\n"
-" Generate a scanner that utilizes GCC's computed-goto feature. That is,\n"
-" re2c generates jump tables whenever a decision is of certain complexity\n"
-" (e.g., a lot of if conditions would be otherwise necessary). This is\n"
-" only usable with compilers that support this feature. Note that this\n"
-" implies -b and that the complexity threshold can be configured using\n"
-" the cgoto:threshold inplace configuration.\n"
-"\n"
-"-i --no-debug-info\n"
-" Do not output #line information. This is useful when you want use a CMS\n"
-" tool with re2c's output. You might want to do this if you do not want\n"
-" to impose re2c as a build requirement for your source.\n"
-"\n"
-"-o OUTPUT --output=OUTPUT\n"
-" Specify the OUTPUT file.\n"
-"\n"
-"-r --reusable\n"
-" Allows reuse of scanner definitions with /*!use:re2c */ after\n"
-" /*!rules:re2c */. In this mode, no /*!re2c */ block and exactly one\n"
-" /*!rules:re2c */ must be present. The rules are saved and used by\n"
-" every /*!use:re2c */ block that follows. These blocks can contain\n"
-" inplace configurations, especially re2c:flags:e, re2c:flags:w,\n"
-" re2c:flags:x, re2c:flags:u, and re2c:flags:8. That way it is possible\n"
-" to create the same scanner multiple times for different character\n"
-" types, different input mechanisms, or different output mechanisms. The\n"
-" /*!use:re2c */ blocks can also contain additional rules that will be\n"
-" appended to the set of rules in /*!rules:re2c */.\n"
-"\n"
-"-s --nested-ifs\n"
-" Generate nested ifs for some switches. Many compilers need this assist\n"
-" to generate better code.\n"
-"\n"
-"-t HEADER --type-header=HEADER\n"
-" Create a HEADER file that contains types for the (f)lex-like condition\n"
-" support. This can only be activated when -c is in use.\n"
-"\n"
-"-u --unicode\n"
-" Generate a parser that supports UTF-32. The generated code can deal\n"
-" with any valid Unicode character up to 0x10FFFF. In this mode, re2c\n"
-" assumes an input character size of 4 bytes. This switch is incompatible\n"
-" with -e, -w, -x, and -8. This implies -s.\n"
-"\n"
-"-v --version\n"
-" Show version information.\n"
-"\n"
-"-V --vernum\n"
-" Show the version as a number in the MMmmpp (Majorm, minor, patch) for\xe2\x80\x90\n"
-" mat.\n"
-"\n"
-"-w --wide-chars\n"
-" Generate a parser that supports UCS-2. The generated code can deal with\n"
-" any valid Unicode character up to 0xFFFF. In this mode, re2c assumes\n"
-" an input character size of 2 bytes. This switch is incompatible with\n"
-" -e, -x, -u, and -8. This implies -s.\n"
-"\n"
-"-x --utf-16\n"
-" Generate a parser that supports UTF-16. The generated code can deal\n"
-" with any valid Unicode character up to 0x10FFFF. In this mode, re2c\n"
-" assumes an input character size of 2 bytes. This switch is incompatible\n"
-" with -e, -w, -u, and -8. This implies -s.\n"
-"\n"
-"-8 --utf-8\n"
-" Generate a parser that supports UTF-8. The generated code can deal with\n"
-" any valid Unicode character up to 0x10FFFF. In this mode, re2c assumes\n"
-" an input character size of 1 byte. This switch is incompatible with -e,\n"
-" -w, -x, and -u.\n"
-"\n"
-"--case-insensitive\n"
-" Makes all strings case insensitive. This makes \"-quoted expressions\n"
-" behave as '-quoted expressions.\n"
-"\n"
-"--case-inverted\n"
-" Invert the meaning of single and double quoted strings. With this\n"
-" switch, single quotes are case sensitive and double quotes are case\n"
-" insensitive.\n"
-"\n"
-"--no-generation-date\n"
-" Suppress date output in the generated file.\n"
-"\n"
-"--no-version\n"
-" Suppress version output in the generated file.\n"
-"\n"
-"--no-generation-date\n"
-" Suppress version output in the generated file.\n"
-"\n"
-"--encoding-policy POLICY\n"
-" Specify how re2c must treat Unicode surrogates. POLICY can be one of\n"
-" the following: fail (abort with an error when a surrogate is encoun\xe2\x80\x90\n"
-" tered), substitute (silently replace surrogates with the error code\n"
-" point 0xFFFD), ignore (treat surrogates as normal code points). By\n"
-" default, re2c ignores surrogates (for backward compatibility). The Uni\xe2\x80\x90\n"
-" code standard says that standalone surrogates are invalid code points,\n"
-" but different libraries and programs treat them differently.\n"
-"\n"
-"--input INPUT\n"
-" Specify re2c's input API. INPUT can be either default or custom.\n"
-"\n"
-"-S --skeleton\n"
-" Instead of embedding re2c-generated code into C/C++ source, generate a\n"
-" self-contained program for the same DFA. Most useful for correctness\n"
-" and performance testing.\n"
-"\n"
-"--empty-class POLICY\n"
-" What to do if the user uses an empty character class. POLICY can be one\n"
-" of the following: match-empty (match empty input: pretty illogical, but\n"
-" this is the default for backwards compatibility reasons), match-none\n"
-" (fail to match on any input), error (compilation error). Note that\n"
-" there are various ways to construct an empty class, e.g., [],\n"
-" [^\\x00-\\xFF], [\\x00-\\xFF][\\x00-\\xFF].\n"
-"\n"
-"--dfa-minimization <table | moore>\n"
-" The internal algorithm used by re2c to minimize the DFA (defaults to\n"
-" moore). Both the table filling algorithm and the Moore algorithm\n"
-" should produce the same DFA (up to states relabeling). The table fill\xe2\x80\x90\n"
-" ing algorithm is much simpler and slower; it serves as a reference\n"
-" implementation.\n"
-"\n"
-"-1 --single-pass\n"
-" Deprecated. Does nothing (single pass is the default now).\n"
-"\n"
-"-W Turn on all warnings.\n"
-"\n"
-"-Werror\n"
-" Turn warnings into errors. Note that this option alone doesn't turn on\n"
-" any warnings at all; it only affects those warnings that have been\n"
-" turned on so far or those that will be turned on later.\n"
-"\n"
-"-W<warning>\n"
-" Turn on a warning.\n"
-"\n"
-"-Wno-<warning>\n"
-" Turn off a warning.\n"
-"\n"
-"-Werror-<warning>\n"
-" Turn on a warning and treat it as an error (this implies -W<warning>).\n"
-"\n"
-"-Wno-error-<warning>\n"
-" Don't treat this particular warning as an error. This doesn't turn off\n"
-" the warning itself.\n"
-"\n"
-"-Wcondition-order\n"
-" Warn if the generated program makes implicit assumptions about condi\xe2\x80\x90\n"
-" tion numbering. You should use either the -t, --type-header option or\n"
-" the /*!types:re2c*/ directive to generate a mapping of condition names\n"
-" to numbers and then use the autogenerated condition names.\n"
-"\n"
-"-Wempty-character-class\n"
-" Warn if a regular expression contains an empty character class. Ratio\xe2\x80\x90\n"
-" nally, trying to match an empty character class makes no sense: it\n"
-" should always fail. However, for backwards compatibility reasons, re2c\n"
-" allows empty character classes and treats them as empty strings. Use\n"
-" the --empty-class option to change the default behavior.\n"
-"\n"
-"-Wmatch-empty-string\n"
-" Warn if a regular expression in a rule is nullable (matches an empty\n"
-" string). If the DFA runs in a loop and an empty match is unintentional\n"
-" (the input position in not advanced manually), the lexer may get stuck\n"
-" in an infinite loop.\n"
-"\n"
-"-Wswapped-range\n"
-" Warn if the lower bound of a range is greater than its upper bound. The\n"
-" default behavior is to silently swap the range bounds.\n"
-"\n"
-"-Wundefined-control-flow\n"
-" Warn if some input strings cause undefined control flow in the lexer\n"
-" (the faulty patterns are reported). This is the most dangerous and most\n"
-" common mistake. It can be easily fixed by adding the default rule (*)\n"
-" (this rule has the lowest priority, matches any code unit, and consumes\n"
-" exactly one code unit).\n"
-"\n"
-"-Wunreachable-rules\n"
-" Warn about rules that are shadowed by other rules and will never match.\n"
-"\n"
-"-Wuseless-escape\n"
-" Warn if a symbol is escaped when it shouldn't be. By default, re2c\n"
-" silently ignores such escapes, but this may as well indicate a typo or\n"
-" error in the escape sequence.\n"
-"\n"
-""
- );
+ fprintf(stdout, "%s", help);
}
void vernum ()
projects / re2c / commitdiff