src/st-node.h

   1 /*
   2  * st-node.h
   3  *
   4  * Copyright (c) 2008 Vincent Geddes
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23 */
  24
  25 #ifndef __ST_NODE_H__
  26 #define __ST_NODE_H__
  27
  28 #include <st-types.h>
  29 #include <st-utils.h>
  30
  31 typedef enum
  32 {
  33     ST_METHOD_NODE,
  34     ST_BLOCK_NODE,
  35     ST_VARIABLE_NODE,
  36     ST_ASSIGN_NODE,
  37     ST_RETURN_NODE,
  38     ST_MESSAGE_NODE,
  39     ST_CASCADE_NODE,
  40     ST_LITERAL_NODE,
  41
  42 } st_node_type;
  43
  44 typedef enum
  45 {
  46     ST_UNARY_PRECEDENCE,
  47     ST_BINARY_PRECEDENCE,
  48     ST_KEYWORD_PRECEDENCE,
  49
  50 } STMessagePrecedence;
  51
  52 typedef struct st_node st_node;
  53
  54 struct st_node
  55 {
  56     st_node_type type;
  57     int        line;
  58     st_node    *next;
  59
  60     union {
  61
  62         struct {
  63             STMessagePrecedence precedence;
  64             int     primitive;
  65             st_oop  selector;
  66             st_node *statements;
  67             st_node *temporaries;
  68             st_node *arguments;
  69
  70         } method;
  71
  72         struct {
  73             STMessagePrecedence precedence;
  74             bool    is_statement;
  75             st_oop  selector;
  76             st_node *receiver;
  77             st_node *arguments;
  78
  79             bool super_send;
  80
  81         } message;
  82
  83         struct {
  84             char *name;
  85
  86         } variable;
  87
  88         struct {
  89             st_oop value;
  90
  91         } literal;
  92
  93         struct {
  94             st_node *assignee;
  95             st_node *expression;
  96
  97         } assign;
  98
  99         struct {
 100             st_node *expression;
 101
 102         } retrn;
 103
 104         struct {
 105             st_node *statements;
 106             st_node *temporaries;
 107             st_node *arguments;
 108
 109         } block;
 110
 111         struct {
 112             st_node *receiver;
 113             st_list *messages;
 114             bool is_statement;
 115
 116         } cascade;
 117
 118     };
 119
 120 };
 121
 122 st_node *st_node_new          (st_node_type type);
 123
 124 st_node *st_node_list_append  (st_node *list, st_node *node);
 125
 126 st_node *st_node_list_at      (st_node *list, st_uint index);
 127
 128 st_uint  st_node_list_length  (st_node *list);
 129
 130 void     st_print_method_node (st_node *method);
 131
 132 void     st_node_destroy      (st_node *node);
 133
 134 #endif /* __ST_NODE_H__ */
 135