test/langtrans_c.txl

   1 include "testcase.txl"
   2
   3 define c_statements
   4                 [repeat c_lang_stmt]
   5 end define
   6
   7 define c_lang_stmt
   8                 [al_ragel_stmt]
   9         |       [c_variable_decl]
  10         |       [c_expr_stmt]
  11         |       [c_if_stmt]
  12         |       [EX] '{ [IN] [NL] [c_statements] [EX] '} [IN] [NL]
  13 end define
  14
  15 define c_variable_decl
  16                 [c_type_decl] [id] [opt union] '; [NL]
  17 end define
  18
  19 define c_type_decl
  20                 [al_type_decl]
  21         |       'char '*
  22 end define
  23
  24 define c_expr_stmt
  25                 [c_expr] '; [NL]
  26 end define
  27
  28 define c_expr
  29                 [c_term] [repeat c_expr_extend]
  30 end define
  31
  32 define c_expr_extend
  33                 [al_expr_op] [c_term]
  34 end define
  35
  36 define c_term
  37                 [al_term]
  38         |       [id] '( [c_args] ')
  39 end define
  40
  41 define c_args
  42                 [list c_expr]
  43 end define
  44
  45 define c_sign
  46                 '- | '+
  47 end define
  48
  49 define c_if_stmt
  50                 'if '( [c_expr] ') [NL] [IN]
  51                         [c_lang_stmt] [EX]
  52                 [opt c_else]
  53 end define
  54
  55 define c_else
  56                 'else [NL] [IN]
  57                         [c_lang_stmt] [EX]
  58 end define
  59
  60 define c_lang
  61                 [c_statements]
  62                 '%% [NL]
  63                 [c_statements]
  64                 [ragel_def]
  65 end define
  66
  67 define program
  68                 [lang_indep]
  69         |       [c_lang]
  70 end define
  71
  72 redefine al_host_block
  73                 '{ [NL] [IN] [al_statements] [EX] '} [NL]
  74         |       '{ [NL] [IN] [c_statements] [EX] '} [NL]
  75 end define
  76
  77 redefine cond_action_stmt
  78                 'action [id] '{ [al_expr] '} [NL]
  79         |       'action [id] '{ [c_expr] '} [NL]
  80 end redefine
  81
  82
  83 rule boolTypes
  84         replace [al_type_decl]
  85                 'bool
  86         by
  87                 'int
  88 end rule
  89
  90 rule ptrTypes
  91         replace [c_type_decl]
  92                 'ptr
  93         by
  94                 'char '*
  95 end rule
  96
  97 rule boolVals1
  98         replace [al_term]
  99                 'true
 100         by
 101                 '1
 102 end rule
 103
 104 rule boolVals2
 105         replace [al_term]
 106                 'false
 107         by
 108                 '0
 109 end rule
 110
 111 function alStmtToC1 AlStmt [action_lang_stmt]
 112         deconstruct AlStmt
 113                 VarDecl [al_variable_decl]
 114         deconstruct VarDecl
 115                 Type [al_type_decl] Id [id] OptUnion [opt union]';
 116         construct CType [c_type_decl]
 117                 Type
 118         construct Result [c_variable_decl]
 119                 CType [boolTypes] [ptrTypes] Id OptUnion ';
 120         replace [repeat c_lang_stmt]
 121         by
 122                 Result
 123 end function
 124
 125 function alTermToC
 126         replace [al_term]
 127                 'first_token_char
 128         by
 129                 'tokstart '[0]
 130 end function
 131
 132 function alExprExtendToC AlExprExtend [repeat al_expr_extend]
 133         deconstruct AlExprExtend
 134                 Op [al_expr_op] Term [al_term] Rest [repeat al_expr_extend]
 135         construct RestC [repeat c_expr_extend]
 136                 _ [alExprExtendToC Rest]
 137         replace [repeat c_expr_extend]
 138         by
 139                 Op Term [alTermToC] RestC
 140 end function
 141
 142 function alExprToC AlExpr [al_expr]
 143         deconstruct AlExpr
 144                 ALTerm [al_term] AlExprExtend [repeat al_expr_extend]
 145         construct CExprExtend [repeat c_expr_extend]
 146                 _ [alExprExtendToC AlExprExtend]
 147         construct Result [opt c_expr]
 148                 ALTerm [alTermToC] CExprExtend
 149         replace [opt c_expr]
 150         by
 151                 Result [boolVals1] [boolVals2]
 152 end function
 153
 154 function alStmtToC2 AlStmt [action_lang_stmt]
 155         deconstruct AlStmt
 156                 AlExpr [al_expr] ';
 157         construct OptCExpr [opt c_expr]
 158                 _ [alExprToC AlExpr]
 159         deconstruct OptCExpr
 160                 CExpr [c_expr]
 161         replace [repeat c_lang_stmt]
 162         by
 163                 CExpr ';
 164 end function
 165
 166 function alOptElseC AlOptElse [opt al_else]
 167         deconstruct AlOptElse
 168                 'else
 169                         AlSubStmt [action_lang_stmt]
 170         construct AlSubStmts [repeat action_lang_stmt]
 171                 AlSubStmt
 172         construct CSubStmts [repeat c_lang_stmt]
 173                 _ [alToC AlSubStmts]
 174         deconstruct CSubStmts
 175                 CSubStmt [c_lang_stmt]
 176         replace [opt c_else]
 177         by
 178                 'else
 179                         CSubStmt
 180 end function
 181
 182 function alStmtToC3 AlStmt [action_lang_stmt]
 183         deconstruct AlStmt
 184                 'if '( AlExpr [al_expr] ')
 185                         AlSubStmt [action_lang_stmt]
 186                 AlOptElse [opt al_else]
 187         construct OptCExpr [opt c_expr]
 188                 _ [alExprToC AlExpr]
 189         deconstruct OptCExpr
 190                 CExpr [c_expr]
 191         construct AlSubStmts [repeat action_lang_stmt]
 192                 AlSubStmt
 193         construct CSubStmts [repeat c_lang_stmt]
 194                 _ [alToC AlSubStmts]
 195         deconstruct CSubStmts
 196                 CSubStmt [c_lang_stmt]
 197         construct OptCElse [opt c_else]
 198                 _ [alOptElseC AlOptElse]
 199         replace [repeat c_lang_stmt]
 200         by
 201                 'if '( CExpr ')
 202                         CSubStmt
 203                 OptCElse
 204 end function
 205
 206 function alStmtToC4a AlStmt [action_lang_stmt]
 207         deconstruct AlStmt
 208                 'printi Id [id] ';
 209         replace [repeat c_lang_stmt]
 210         by
 211                 'printf '( '"%i" ', Id ');
 212 end function
 213
 214 function alStmtToC4b AlStmt [action_lang_stmt]
 215         deconstruct AlStmt
 216                 'prints String [stringlit] ';
 217         replace [repeat c_lang_stmt]
 218         by
 219                 'fputs '( String , 'stdout ');
 220 end function
 221
 222 function alStmtToC4c AlStmt [action_lang_stmt]
 223         deconstruct AlStmt
 224                 'printb Id [id] ';
 225         replace [repeat c_lang_stmt]
 226         by
 227                 'fwrite '( Id ', '1 ', 'pos ', 'stdout ');
 228 end function
 229
 230 function alStmtToC4d AlStmt [action_lang_stmt]
 231         deconstruct AlStmt
 232                 'print_token ';
 233         replace [repeat c_lang_stmt]
 234         by
 235                 'fwrite '( 'tokstart ', '1 ', 'tokend '- 'tokstart ', 'stdout ');
 236 end function
 237
 238 function alStmtToC5 AlStmt [action_lang_stmt]
 239         deconstruct AlStmt
 240                 '{ AlSubStmts [repeat action_lang_stmt] '}
 241         construct CSubStmts [repeat c_lang_stmt]
 242                 _ [alToC AlSubStmts]
 243         replace [repeat c_lang_stmt]
 244         by
 245                 '{ CSubStmts '}
 246 end function
 247
 248 function alStmtToC6 AlStmt [action_lang_stmt]
 249         deconstruct AlStmt
 250                 RagelStmt [al_ragel_stmt]
 251         replace [repeat c_lang_stmt]
 252         by
 253                 RagelStmt
 254 end function
 255
 256 function alToC AlStmts [repeat action_lang_stmt]
 257         deconstruct AlStmts
 258                 FirstStmt [action_lang_stmt] Rest [repeat action_lang_stmt]
 259         construct FirstC [repeat c_lang_stmt]
 260                 _
 261                         [alStmtToC1 FirstStmt]
 262                         [alStmtToC2 FirstStmt]
 263                         [alStmtToC3 FirstStmt]
 264                         [alStmtToC4a FirstStmt]
 265                         [alStmtToC4b FirstStmt]
 266                         [alStmtToC4c FirstStmt]
 267                         [alStmtToC4d FirstStmt]
 268                         [alStmtToC5 FirstStmt]
 269                         [alStmtToC6 FirstStmt]
 270         construct RestC [repeat c_lang_stmt]
 271                 _ [alToC Rest]
 272         replace [repeat c_lang_stmt]
 273         by
 274                 FirstC [. RestC]
 275 end function
 276
 277 rule actionTransC
 278         replace [al_host_block]
 279                 '{ AlStmts [repeat action_lang_stmt] '}
 280         construct CStmts [repeat c_lang_stmt]
 281                 _ [alToC AlStmts]
 282         by
 283                 '{ CStmts '}
 284 end rule
 285
 286 rule condTransC
 287         replace [cond_action_stmt]
 288                 'action Id [id] '{ AlExpr [al_expr] '}
 289         construct OptCExpr [opt c_expr]
 290                 _ [alExprToC AlExpr]
 291         deconstruct OptCExpr
 292                 CExpr [c_expr]
 293         by
 294                 'action Id '{ CExpr '}
 295 end rule
 296
 297 function langTransC
 298         replace [program]
 299                 Definitions [repeat action_lang_stmt]
 300                 '%%
 301                 Initializations [repeat action_lang_stmt]
 302                 RagelDef [ragel_def]
 303         construct CDefinitions [repeat c_lang_stmt]
 304                 _ [alToC Definitions]
 305         construct CInitializations [repeat c_lang_stmt]
 306                 _ [alToC Initializations]
 307         by
 308                 CDefinitions
 309                 '%%
 310                 CInitializations
 311                 RagelDef [actionTransC] [condTransC]
 312 end function
 313
 314 function main
 315         replace [program]
 316                 P [program]
 317         by
 318                 P [langTransC]
 319 end function