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Add SETSTR/INCLUDESTR for some basic code building It seemed useful to have the ability to build up a variable containing arbitrary text and then to be able to include that in the assembly process like an include file. So add, undocumented for now, the following: SETTSTR varname="string" INCLUDESTSR "string" "string" must be enclosed in double quotes and may contain most of the usual escape sequences (\t, \r, etc.) as well as %(varname) to interpolate a variable value. To use it to create assembleable source code, you need to make sure it creates lines (ended by either \r or \n) with appropriate whitespace in appropriate places.
author William Astle <lost@l-w.ca>
date Sun, 19 Dec 2021 17:01:42 -0700
parents a3e277c58df9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 %include {
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2 #include <assert.h> // only needed due to a bug in lemon
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3 #include <stdio.h>
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4 #include "parse.h"
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5 #include "tree.h"
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6 }
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7
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8 %token_type { struct tokendata * }
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9 %token_prefix PTOK_
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10 %token_destructor { tokendata_free($$); }
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11 %default_type { node_t * }
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12 %extra_argument { struct parserinfo *pinfo }
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13
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14 program(A) ::= rprogram(B). { A = B; pinfo -> parsetree = A; }
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15
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16 rprogram(A) ::= rprogram(C) globaldecl(B). {
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17 A = C;
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18 node_addchild(A, B);
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19 }
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20 rprogram(A) ::= . { A = node_create(NODE_PROGRAM); }
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21
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22 globaldecl(A) ::= vardecl(B). { A = B; }
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23 globaldecl(A) ::= fundecl(B). { A = B; }
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24
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25 vardecl(A) ::= datatype(B) ident(C) ENDS. {
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26 A = node_create(NODE_DECL, B, C);
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27 }
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28
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29 ident(A) ::= IDENTIFIER(B). { A = node_create(NODE_IDENT, B -> strval); }
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30
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31 datatype(A) ::= typename(B). { A = B; }
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32 datatype(A) ::= datatype(B) STAR. { A = node_create(NODE_TYPE_PTR, B); }
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33
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34 typename(A) ::= KW_VOID. { A = node_create(NODE_TYPE_VOID); }
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35 typename(A) ::= KW_FLOAT. { A = node_create(NODE_TYPE_FLOAT); }
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36 typename(A) ::= KW_DOUBLE. { A = node_create(NODE_TYPE_DOUBLE); }
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37 typename(A) ::= KW_LONG KW_DOUBLE. { A = node_create(NODE_TYPE_LDOUBLE); }
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38 typename(A) ::= baseint(B). { A = B; }
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39 typename(A) ::= KW_UNSIGNED. { A = node_create(NODE_TYPE_UINT); }
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40 typename(A) ::= KW_SIGNED. { A = node_create(NODE_TYPE_INT); }
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41 typename(A) ::= KW_SIGNED baseint(B). { A = B; if (A -> type == NODE_TYPE_CHAR) A -> type = NODE_TYPE_SCHAR; }
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42 typename(A) ::= KW_UNSIGNED baseint(B). {
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43 A = B;
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44 switch (A -> type)
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45 {
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46 case NODE_TYPE_CHAR:
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47 A -> type = NODE_TYPE_UCHAR;
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48 break;
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49 case NODE_TYPE_SHORT:
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50 A -> type = NODE_TYPE_USHORT;
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51 break;
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52 case NODE_TYPE_INT:
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53 A -> type = NODE_TYPE_UINT;
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54 break;
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55 case NODE_TYPE_LONG:
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56 A -> type = NODE_TYPE_ULONG;
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57 break;
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58 case NODE_TYPE_LONGLONG:
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59 A -> type = NODE_TYPE_ULONGLONG;
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60 break;
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61 }
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62 }
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64 baseint(A) ::= KW_INT. { A = node_create(NODE_TYPE_INT); }
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65 baseint(A) ::= KW_LONG. { A = node_create(NODE_TYPE_LONG); }
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66 baseint(A) ::= KW_LONG KW_INT. { A = node_create(NODE_TYPE_LONG); }
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67 baseint(A) ::= KW_LONG KW_LONG. { A = node_create(NODE_TYPE_LONGLONG); }
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68 baseint(A) ::= KW_SHORT. { A = node_create(NODE_TYPE_SHORT); }
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69 baseint(A) ::= KW_LONG KW_LONG KW_INT. { A = node_create(NODE_TYPE_LONGLONG); }
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70 baseint(A) ::= KW_SHORT KW_INT. { A = node_create(NODE_TYPE_SHORT); }
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71 baseint(A) ::= KW_CHAR. { A = node_create(NODE_TYPE_CHAR); }
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72
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73
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74 fundecl(A) ::= datatype(B) ident(C) arglist(D) statementblock(E). {
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75 A = node_create(NODE_FUNDEF, B, C, D, E);
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76 }
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77
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78 fundecl(A) ::= datatype(B) ident(C) arglist(D) ENDS. {
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79 A = node_create(NODE_FUNDECL, B, C, D);
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80 }
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81
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82 arglist(A) ::= OPAREN CPAREN. { A = node_create(NODE_FUNARGS); }
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83
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84 statementblock(A) ::= OBRACE CBRACE. { A = node_create(NODE_BLOCK); }
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85
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86 %parse_failure {
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87 fprintf(stderr, "Parse error\n");
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88 }
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89
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90 %stack_overflow {
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91 fprintf(stderr, "Parser stack overflow\n");
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92 }
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93
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94 %syntax_error {
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95 fprintf(stderr, "Undexpected token %d: ", TOKEN -> tokid);
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96 tokendata_print(stderr, TOKEN);
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97 }