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