parse.h

   1 #ifndef PARSE_H_
   2 #define PARSE_H_
   3
   4 #include "token.h"
   5
   6 extern char *pS;
   7 extern char *pC;
   8 extern char pT[];
   9 extern token  tk;
  10 extern ttype ttyp;
  11
  12 /*
  13 * Compiles a complete class.
  14 */
  15 void parse_class();
  16
  17 /*
  18 * Compiles a static declaration or a field declaration.
  19 */
  20 void parse_class_var_dec();
  21
  22 /*
  23 * Compiles a complete method, function or constructor.
  24 */
  25 void parse_subroutine();
  26
  27 /*
  28 * Compiles a (possibly empty) parameter list.
  29 * Skips over the parentheses.
  30 */
  31 void parse_params();
  32
  33 /*
  34 * Compiles a variable declaration.
  35 */
  36 void parse_var_dec();
  37
  38 /*
  39 * Compiles a sequence of statements.
  40 * Skips over opening and closing braces.
  41 */
  42 void parse_statements();
  43
  44 /*
  45 * Compiles do statement.
  46 */
  47 void parse_do();
  48
  49 /*
  50 * Compiles let statement.
  51 */
  52 void parse_let();
  53
  54 /*
  55 * Compiles while statement.
  56 */
  57 void parse_while();
  58
  59 /*
  60 * Compiles return statement.
  61 */
  62 void parse_return();
  63
  64 /*
  65 * Compiles an if statement, possibly including an else statement.
  66 */
  67 void parse_if();
  68
  69 /*
  70 * Compiles and expression.
  71 */
  72 void parse_expression();
  73
  74 /*
  75 * Compiles a term.
  76 * Must determine if if current token is an identifier and must
  77 * distinguish between a variable, array entry or a subroutine call.
  78 * The three tokens "[", "(" and "." determine the option.
  79 * Any other token is not part of this term and should not be advanced over.
  80 */
  81 void parse_term();
  82
  83 /*
  84  *      Compiles a call to a defined subroutine.
  85  */
  86 void parse_subroutine_call();
  87
  88 /*
  89 * Compiles a (possibly empty) comma-separated list of expressions.
  90 */
  91 void parse_expr_lst();
  92
  93 #endif