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Diffstat (limited to 'util/sconfig/parsedesc.g')
| -rw-r--r-- | util/sconfig/parsedesc.g | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/util/sconfig/parsedesc.g b/util/sconfig/parsedesc.g deleted file mode 100644 index acb8524838..0000000000 --- a/util/sconfig/parsedesc.g +++ /dev/null @@ -1,195 +0,0 @@ -###################################################################### -# The remainder of this file is from parsedesc.{g,py} - -def append(lst, x): - "Imperative append" - lst.append(x) - return lst - -def add_inline_token(tokens, str): - tokens.insert( 0, (str, eval(str, {}, {})) ) - return Terminal(str) - -def cleanup_choice(lst): - if len(lst) == 0: return Sequence([]) - if len(lst) == 1: return lst[0] - return apply(Choice, tuple(lst)) - -def cleanup_sequence(lst): - if len(lst) == 1: return lst[0] - return apply(Sequence, tuple(lst)) - -def cleanup_rep(node, rep): - if rep == 'star': return Star(node) - elif rep == 'plus': return Plus(node) - else: return node - -def resolve_name(tokens, id, args): - if id in map(lambda x: x[0], tokens): - # It's a token - if args: - print 'Warning: ignoring parameters on TOKEN %s<<%s>>' % (id, args) - return Terminal(id) - else: - # It's a name, so assume it's a nonterminal - return NonTerminal(id, args) - -%% -parser ParserDescription: - option: "context-insensitive-scanner" - - ignore: "[ \t\r\n]+" - ignore: "#.*?\r?\n" - token END: "$" - token ATTR: "<<.+?>>" - token STMT: "{{.+?}}" - token ID: '[a-zA-Z_][a-zA-Z_0-9]*' - token STR: '[rR]?\'([^\\n\'\\\\]|\\\\.)*\'|[rR]?"([^\\n"\\\\]|\\\\.)*"' - token LP: '\\(' - token RP: '\\)' - token LB: '\\[' - token RB: '\\]' - token OR: '[|]' - token STAR: '[*]' - token PLUS: '[+]' - token QUEST: '[?]' - token COLON: ':' - - rule Parser: "parser" ID ":" - Options - Tokens - Rules<<Tokens>> - END - {{ return Generator(ID,Options,Tokens,Rules) }} - - rule Options: {{ opt = {} }} - ( "option" ":" Str {{ opt[Str] = 1 }} )* - {{ return opt }} - - rule Tokens: {{ tok = [] }} - ( - "token" ID ":" Str {{ tok.append( (ID,Str) ) }} - | "ignore" ":" Str {{ tok.append( ('#ignore',Str) ) }} - )* - {{ return tok }} - - rule Rules<<tokens>>: - {{ rul = [] }} - ( - "rule" ID OptParam ":" ClauseA<<tokens>> - {{ rul.append( (ID,OptParam,ClauseA) ) }} - )* - {{ return rul }} - - rule ClauseA<<tokens>>: - ClauseB<<tokens>> - {{ v = [ClauseB] }} - ( OR ClauseB<<tokens>> {{ v.append(ClauseB) }} )* - {{ return cleanup_choice(v) }} - - rule ClauseB<<tokens>>: - {{ v = [] }} - ( ClauseC<<tokens>> {{ v.append(ClauseC) }} )* - {{ return cleanup_sequence(v) }} - - rule ClauseC<<tokens>>: - ClauseD<<tokens>> - ( PLUS {{ return Plus(ClauseD) }} - | STAR {{ return Star(ClauseD) }} - | {{ return ClauseD }} ) - - rule ClauseD<<tokens>>: - STR {{ t = (STR, eval(STR,{},{})) }} - {{ if t not in tokens: tokens.insert( 0, t ) }} - {{ return Terminal(STR) }} - | ID OptParam {{ return resolve_name(tokens, ID, OptParam) }} - | LP ClauseA<<tokens>> RP {{ return ClauseA }} - | LB ClauseA<<tokens>> RB {{ return Option(ClauseA) }} - | STMT {{ return Eval(STMT[2:-2]) }} - - rule OptParam: [ ATTR {{ return ATTR[2:-2] }} ] {{ return '' }} - rule Str: STR {{ return eval(STR,{},{}) }} -%% - -# This replaces the default main routine - -yapps_options = [ - ('context-insensitive-scanner', 'context-insensitive-scanner', - 'Scan all tokens (see docs)') - ] - -def generate(inputfilename, outputfilename='', dump=0, **flags): - """Generate a grammar, given an input filename (X.g) - and an output filename (defaulting to X.py).""" - - if not outputfilename: - if inputfilename[-2:]=='.g': outputfilename = inputfilename[:-2]+'.py' - else: raise "Invalid Filename", outputfilename - - print ' SCONFIG ', join(outputfilename.split('/')[-4:], '/') - - DIVIDER = '\n%%\n' # This pattern separates the pre/post parsers - preparser, postparser = None, None # Code before and after the parser desc - - # Read the entire file - s = open(inputfilename,'r').read() - - # See if there's a separation between the pre-parser and parser - f = find(s, DIVIDER) - if f >= 0: preparser, s = s[:f]+'\n\n', s[f+len(DIVIDER):] - - # See if there's a separation between the parser and post-parser - f = find(s, DIVIDER) - if f >= 0: s, postparser = s[:f], '\n\n'+s[f+len(DIVIDER):] - - # Create the parser and scanner - p = ParserDescription(ParserDescriptionScanner(s)) - if not p: return - - # Now parse the file - t = wrap_error_reporter(p, 'Parser') - if not t: return # Error - if preparser is not None: t.preparser = preparser - if postparser is not None: t.postparser = postparser - - # Check the options - for f in t.options.keys(): - for opt,_,_ in yapps_options: - if f == opt: break - else: - print 'Warning: unrecognized option', f - # Add command line options to the set - for f in flags.keys(): t.options[f] = flags[f] - - # Generate the output - if dump: - t.dump_information() - else: - t.output = open(outputfilename, 'w') - t.generate_output() - -if __name__=='__main__': - import sys, getopt - optlist, args = getopt.getopt(sys.argv[1:], 'f:', ['dump']) - if not args or len(args) > 2: - print 'Usage:' - print ' python', sys.argv[0], '[flags] input.g [output.py]' - print 'Flags:' - print (' --dump' + ' '*40)[:35] + 'Dump out grammar information' - for flag, _, doc in yapps_options: - print (' -f' + flag + ' '*40)[:35] + doc - else: - # Read in the options and create a list of flags - flags = {} - for opt in optlist: - for flag, name, _ in yapps_options: - if opt == ('-f', flag): - flags[name] = 1 - break - else: - if opt == ('--dump', ''): - flags['dump'] = 1 - else: - print 'Warning - unrecognized option: ', opt[0], opt[1] - - apply(generate, tuple(args), flags) |