others/jflex/iotparser.jflex

   1 // JFlex parser specification written by
   2 // Rahmadi Trimananda
   3 // for Sentinel system
   4 // University of California, Irvine
   5
   6 // Technische Universitaet Muenchen
   7 // Fakultaet fuer Informatik
   8
   9 import java_cup.runtime.Symbol;
  10 import java_cup.runtime.ComplexSymbolFactory;
  11 import java_cup.runtime.ComplexSymbolFactory.Location;
  12
  13 %%
  14
  15 %public
  16 %class Lexer
  17 %cup
  18 %implements sym
  19 %char
  20 %line
  21 %column
  22
  23 %{
  24     StringBuffer string = new StringBuffer();
  25     public Lexer(java.io.Reader in, ComplexSymbolFactory sf){
  26         this(in);
  27         symbolFactory = sf;
  28     }
  29     ComplexSymbolFactory symbolFactory;
  30
  31   private Symbol symbol(String name, int sym) {
  32       return symbolFactory.newSymbol(name, sym, new Location(yyline+1,yycolumn+1,yychar), new Location(yyline+1,yycolumn+yylength(),yychar+yylength()));
  33   }
  34
  35   private Symbol symbol(String name, int sym, Object val) {
  36       Location left = new Location(yyline+1,yycolumn+1,yychar);
  37       Location right= new Location(yyline+1,yycolumn+yylength(), yychar+yylength());
  38       return symbolFactory.newSymbol(name, sym, left, right,val);
  39   }
  40   private Symbol symbol(String name, int sym, Object val,int buflength) {
  41       Location left = new Location(yyline+1,yycolumn+yylength()-buflength,yychar+yylength()-buflength);
  42       Location right= new Location(yyline+1,yycolumn+yylength(), yychar+yylength());
  43       return symbolFactory.newSymbol(name, sym, left, right,val);
  44   }
  45   private void error(String message) {
  46     System.out.println("Error at line "+(yyline+1)+", column "+(yycolumn+1)+" : "+message);
  47   }
  48 %}
  49
  50 %eofval{
  51      return symbolFactory.newSymbol("EOF", EOF, new Location(yyline+1,yycolumn+1,yychar), new Location(yyline+1,yycolumn+1,yychar+1));
  52 %eofval}
  53
  54
  55 Ident = [a-zA-Z$_] [a-zA-Z0-9$_]*
  56
  57 new_line = \r|\n|\r\n;
  58
  59 white_space = {new_line} | [ \t\f]
  60
  61 %state STRING
  62
  63 %%
  64
  65 <YYINITIAL>{
  66 /* keywords */
  67 "int"             { return symbol("int",TYPE, "int" ); }
  68 "short"           { return symbol("short",TYPE, "short" ); }
  69 "byte"            { return symbol("byte",TYPE, "byte" ); }
  70 "long"            { return symbol("long",TYPE, "long" ); }
  71 "float"           { return symbol("float",TYPE, "float" ); }
  72 "double"          { return symbol("double",TYPE, "double" ); }
  73 "char"            { return symbol("char",TYPE, "char" ); }
  74 "string"          { return symbol("string",TYPE, "String" ); }
  75 "String"          { return symbol("String",TYPE, "String" ); }
  76 "boolean"         { return symbol("boolean",TYPE, "boolean" ); }
  77 "void"            { return symbol("void",TYPE, "void" ); }
  78 "public"          { return symbol("public",PUBLIC); }
  79 "interface"       { return symbol("interface",INTERFACE); }
  80 "capability"      { return symbol("capability",CAPABILITY); }
  81 "description"     { return symbol("description",DESCRIPTION); }
  82 "method"          { return symbol("method",METHOD); }
  83 "requires"        { return symbol("requires",REQUIRES); }
  84 "with"            { return symbol("with",WITH); }
  85 "as"              { return symbol("as",AS); }
  86
  87 /* names */
  88 {Ident}           { return symbol("Identifier",IDENT, yytext()); }
  89
  90
  91 /* string literals */
  92
  93 /* char literal */
  94
  95 /* bool literal */
  96
  97 /* literals */
  98
  99
 100
 101 /* separators */
 102   \"              { string.setLength(0); yybegin(STRING); }
 103 ";"               { return symbol("semicolon",SEMICOLON); }
 104 ","               { return symbol("comma",COMMA); }
 105 "("               { return symbol("(",LPAR); }
 106 ")"               { return symbol(")",RPAR); }
 107 "<"               { return symbol("<",LANG); }
 108 ">"               { return symbol(">",RANG); }
 109 "{"               { return symbol("{",BEGIN); }
 110 "}"               { return symbol("}",END); }
 111 "="               { return symbol("=",ASSIGN); }
 112
 113 {white_space}     { /* ignore */ }
 114
 115 }
 116
 117 <STRING> {
 118   \"                             { yybegin(YYINITIAL);
 119       return symbol("StringConst",STRINGCONST,string.toString(),string.length()); }
 120   [^\n\r\"\\]+                   { string.append( yytext() ); }
 121   \\t                            { string.append('\t'); }
 122   \\n                            { string.append('\n'); }
 123
 124   \\r                            { string.append('\r'); }
 125   \\\"                           { string.append('\"'); }
 126   \\                             { string.append('\\'); }
 127 }
 128
 129
 130 /* error fallback */
 131 .|\n              {  /* throw new Error("Illegal character <"+ yytext()+">");*/
 132                     error("Illegal character <"+ yytext()+">");
 133                   }