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1.1 root 1: %token FIRSTTOKEN /*must be first*/
2: %token FINAL FATAL
3: %token LT LE GT GE EQ NE
4: %token MATCH NOTMATCH
5: %token APPEND
6: %token ADD MINUS MULT DIVIDE MOD UMINUS
7: %token ASSIGN ADDEQ SUBEQ MULTEQ DIVEQ MODEQ
8: %token JUMP
9: %token XBEGIN XEND
10: %token NL
11: %token PRINT PRINTF SPRINTF SPLIT
12: %token IF ELSE WHILE FOR IN NEXT EXIT BREAK CONTINUE
13: %token PROGRAM PASTAT PASTAT2
14:
15: %right ASGNOP
16: %left BOR
17: %left AND
18: %left NOT
19: %left NUMBER VAR ARRAY FNCN SUBSTR LSUBSTR INDEX
20: %left GETLINE
21: %nonassoc RELOP MATCHOP
22: %left OR
23: %left STRING DOT CCL NCCL CHAR
24: %left '(' '^' '$'
25: %left CAT
26: %left '+' '-'
27: %left '*' '/' '%'
28: %left STAR PLUS QUEST
29: %left POSTINCR PREINCR POSTDECR PREDECR INCR DECR
30: %left FIELD INDIRECT
31: %token LASTTOKEN /* has to be last */
32:
33: %{
34: #include "awk.def"
35: #ifndef DEBUG
36: # define PUTS(x)
37: #endif
38: %}
39: %%
40:
41: program:
42: begin pa_stats end { if (errorflag==0) winner = (node *)stat3(PROGRAM, $1, $2, $3); }
43: | error { yyclearin; yyerror("bailing out"); }
44: ;
45:
46: begin:
47: XBEGIN '{' stat_list '}' { PUTS("XBEGIN list"); $$ = $3; }
48: | begin NL
49: | { PUTS("empty XBEGIN"); $$ = (hack)nullstat; }
50: ;
51:
52: end:
53: XEND '{' stat_list '}' { PUTS("XEND list"); $$ = $3; }
54: | end NL
55: | { PUTS("empty END"); $$ = (hack)nullstat; }
56: ;
57:
58: compound_conditional:
59: conditional BOR conditional { PUTS("cond||cond"); $$ = op2(BOR, $1, $3); }
60: | conditional AND conditional { PUTS("cond&&cond"); $$ = op2(AND, $1, $3); }
61: | NOT conditional { PUTS("!cond"); $$ = op1(NOT, $2); }
62: | '(' compound_conditional ')' { $$ = $2; }
63: ;
64:
65: compound_pattern:
66: pattern BOR pattern { PUTS("pat||pat"); $$ = op2(BOR, $1, $3); }
67: | pattern AND pattern { PUTS("pat&&pat"); $$ = op2(AND, $1, $3); }
68: | NOT pattern { PUTS("!pat"); $$ = op1(NOT, $2); }
69: | '(' compound_pattern ')' { $$ = $2; }
70: ;
71:
72: conditional:
73: expr { PUTS("expr"); $$ = op2(NE, $1, valtonode(lookup("$zero&null", symtab, 0), CCON)); }
74: | rel_expr { PUTS("relexpr"); }
75: | lex_expr { PUTS("lexexpr"); }
76: | compound_conditional { PUTS("compcond"); }
77: ;
78:
79: else:
80: ELSE optNL { PUTS("else"); }
81: ;
82:
83: field:
84: FIELD { PUTS("field"); $$ = valtonode($1, CFLD); }
85: | INDIRECT term { PUTS("ind field"); $$ = op1(INDIRECT, $2); }
86: ;
87:
88: if:
89: IF '(' conditional ')' optNL { PUTS("if(cond)"); $$ = $3; }
90: ;
91:
92: lex_expr:
93: expr MATCHOP regular_expr { PUTS("expr~re"); $$ = op2($2, $1, makedfa($3)); }
94: | '(' lex_expr ')' { PUTS("(lex_expr)"); $$ = $2; }
95: ;
96:
97: var:
98: NUMBER {PUTS("number"); $$ = valtonode($1, CCON); }
99: | STRING { PUTS("string"); $$ = valtonode($1, CCON); }
100: | VAR { PUTS("var"); $$ = valtonode($1, CVAR); }
101: | VAR '[' expr ']' { PUTS("array[]"); $$ = op2(ARRAY, $1, $3); }
102: | field
103: ;
104: term:
105: var
106: | GETLINE { PUTS("getline"); $$ = op1(GETLINE, 0); }
107: | FNCN { PUTS("func");
108: $$ = op2(FNCN, $1, valtonode(lookup("$record", symtab, 0), CFLD));
109: }
110: | FNCN '(' ')' { PUTS("func()");
111: $$ = op2(FNCN, $1, valtonode(lookup("$record", symtab, 0), CFLD));
112: }
113: | FNCN '(' expr ')' { PUTS("func(expr)"); $$ = op2(FNCN, $1, $3); }
114: | SPRINTF print_list { PUTS("sprintf"); $$ = op1($1, $2); }
115: | SUBSTR '(' expr ',' expr ',' expr ')'
116: { PUTS("substr(e,e,e)"); $$ = op3(SUBSTR, $3, $5, $7); }
117: | SUBSTR '(' expr ',' expr ')'
118: { PUTS("substr(e,e,e)"); $$ = op3(SUBSTR, $3, $5, nullstat); }
119: | SPLIT '(' expr ',' VAR ',' expr ')'
120: { PUTS("split(e,e,e)"); $$ = op3(SPLIT, $3, $5, $7); }
121: | SPLIT '(' expr ',' VAR ')'
122: { PUTS("split(e,e,e)"); $$ = op3(SPLIT, $3, $5, nullstat); }
123: | INDEX '(' expr ',' expr ')'
124: { PUTS("index(e,e)"); $$ = op2(INDEX, $3, $5); }
125: | '(' expr ')' {PUTS("(expr)"); $$ = $2; }
126: | term '+' term { PUTS("t+t"); $$ = op2(ADD, $1, $3); }
127: | term '-' term { PUTS("t-t"); $$ = op2(MINUS, $1, $3); }
128: | term '*' term { PUTS("t*t"); $$ = op2(MULT, $1, $3); }
129: | term '/' term { PUTS("t/t"); $$ = op2(DIVIDE, $1, $3); }
130: | term '%' term { PUTS("t%t"); $$ = op2(MOD, $1, $3); }
131: | '-' term %prec QUEST { PUTS("-term"); $$ = op1(UMINUS, $2); }
132: | '+' term %prec QUEST { PUTS("+term"); $$ = $2; }
133: | INCR var { PUTS("++var"); $$ = op1(PREINCR, $2); }
134: | DECR var { PUTS("--var"); $$ = op1(PREDECR, $2); }
135: | var INCR { PUTS("var++"); $$= op1(POSTINCR, $1); }
136: | var DECR { PUTS("var--"); $$= op1(POSTDECR, $1); }
137: ;
138:
139: expr:
140: term { PUTS("term"); }
141: | expr term { PUTS("expr term"); $$ = op2(CAT, $1, $2); }
142: | var ASGNOP expr { PUTS("var=expr"); $$ = stat2($2, $1, $3); }
143: ;
144:
145: optNL:
146: NL
147: |
148: ;
149:
150: pa_stat:
151: pattern { PUTS("pattern"); $$ = stat2(PASTAT, $1, genprint()); }
152: | pattern '{' stat_list '}' { PUTS("pattern {...}"); $$ = stat2(PASTAT, $1, $3); }
153: | pattern ',' pattern { PUTS("srch,srch"); $$ = pa2stat($1, $3, genprint()); }
154: | pattern ',' pattern '{' stat_list '}'
155: { PUTS("srch, srch {...}"); $$ = pa2stat($1, $3, $5); }
156: | '{' stat_list '}' { PUTS("null pattern {...}"); $$ = stat2(PASTAT, nullstat, $2); }
157: ;
158:
159: pa_stats:
160: pa_stats pa_stat st { PUTS("pa_stats pa_stat"); $$ = linkum($1, $2); }
161: | { PUTS("null pa_stat"); $$ = (hack)nullstat; }
162: | pa_stats pa_stat {PUTS("pa_stats pa_stat"); $$ = linkum($1, $2); }
163: ;
164:
165: pattern:
166: regular_expr { PUTS("regex");
167: $$ = op2(MATCH, valtonode(lookup("$record", symtab, 0), CFLD), makedfa($1));
168: }
169: | rel_expr { PUTS("relexpr"); }
170: | lex_expr { PUTS("lexexpr"); }
171: | compound_pattern { PUTS("comp pat"); }
172: ;
173:
174: print_list:
175: expr { PUTS("expr"); }
176: | pe_list { PUTS("pe_list"); }
177: | { PUTS("null print_list"); $$ = valtonode(lookup("$record", symtab, 0), CFLD); }
178: ;
179:
180: pe_list:
181: expr ',' expr {$$ = linkum($1, $3); }
182: | pe_list ',' expr {$$ = linkum($1, $3); }
183: | '(' pe_list ')' {$$ = $2; }
184: ;
185:
186: redir:
187: RELOP
188: | '|'
189: ;
190:
191: regular_expr:
192: '/' { startreg(); }
193: r '/'
194: { PUTS("/r/"); $$ = $3; }
195: ;
196:
197: r:
198: CHAR { PUTS("regex CHAR"); $$ = op2(CHAR, (node *) 0, $1); }
199: | DOT { PUTS("regex DOT"); $$ = op2(DOT, (node *) 0, (node *) 0); }
200: | CCL { PUTS("regex CCL"); $$ = op2(CCL, (node *) 0, cclenter($1)); }
201: | NCCL { PUTS("regex NCCL"); $$ = op2(NCCL, (node *) 0, cclenter($1)); }
202: | '^' { PUTS("regex ^"); $$ = op2(CHAR, (node *) 0, HAT); }
203: | '$' { PUTS("regex $"); $$ = op2(CHAR, (node *) 0 ,(node *) 0); }
204: | r OR r { PUTS("regex OR"); $$ = op2(OR, $1, $3); }
205: | r r %prec CAT
206: { PUTS("regex CAT"); $$ = op2(CAT, $1, $2); }
207: | r STAR { PUTS("regex STAR"); $$ = op2(STAR, $1, (node *) 0); }
208: | r PLUS { PUTS("regex PLUS"); $$ = op2(PLUS, $1, (node *) 0); }
209: | r QUEST { PUTS("regex QUEST"); $$ = op2(QUEST, $1, (node *) 0); }
210: | '(' r ')' { PUTS("(regex)"); $$ = $2; }
211: ;
212:
213: rel_expr:
214: expr RELOP expr
215: { PUTS("expr relop expr"); $$ = op2($2, $1, $3); }
216: | '(' rel_expr ')'
217: { PUTS("(relexpr)"); $$ = $2; }
218: ;
219:
220: st:
221: NL
222: | ';'
223: ;
224:
225: simple_stat:
226: PRINT print_list redir expr
227: { PUTS("print>stat"); $$ = stat3($1, $2, $3, $4); }
228: | PRINT print_list
229: { PUTS("print list"); $$ = stat3($1, $2, nullstat, nullstat); }
230: | PRINTF print_list redir expr
231: { PUTS("printf>stat"); $$ = stat3($1, $2, $3, $4); }
232: | PRINTF print_list
233: { PUTS("printf list"); $$ = stat3($1, $2, nullstat, nullstat); }
234: | expr { PUTS("expr"); $$ = exptostat($1); }
235: | { PUTS("null simple statement"); $$ = (hack)nullstat; }
236: | error { yyclearin; yyerror("illegal statement"); }
237: ;
238:
239: statement:
240: simple_stat st { PUTS("simple stat"); }
241: | if statement { PUTS("if stat"); $$ = stat3(IF, $1, $2, nullstat); }
242: | if statement else statement
243: { PUTS("if-else stat"); $$ = stat3(IF, $1, $2, $4); }
244: | while statement { PUTS("while stat"); $$ = stat2(WHILE, $1, $2); }
245: | for { PUTS("for stat"); }
246: | NEXT st { PUTS("next"); $$ = stat1(NEXT, 0); }
247: | EXIT st { PUTS("exit"); $$ = stat1(EXIT, 0); }
248: | EXIT expr st { PUTS("exit"); $$ = stat1(EXIT, $2); }
249: | BREAK st { PUTS("break"); $$ = stat1(BREAK, 0); }
250: | CONTINUE st { PUTS("continue"); $$ = stat1(CONTINUE, 0); }
251: | '{' stat_list '}' { PUTS("{statlist}"); $$ = $2; }
252: ;
253:
254: stat_list:
255: stat_list statement { PUTS("stat_list stat"); $$ = linkum($1, $2); }
256: | { PUTS("null stat list"); $$ = (hack)nullstat; }
257: ;
258:
259: while:
260: WHILE '(' conditional ')' optNL { PUTS("while(cond)"); $$ = $3; }
261: ;
262:
263: for:
264: FOR '(' simple_stat ';' conditional ';' simple_stat ')' optNL statement
265: { PUTS("for(e;e;e)"); $$ = stat4(FOR, $3, $5, $7, $10); }
266: | FOR '(' simple_stat ';' ';' simple_stat ')' optNL statement
267: { PUTS("for(e;e;e)"); $$ = stat4(FOR, $3, nullstat, $6, $9); }
268: | FOR '(' VAR IN VAR ')' optNL statement
269: { PUTS("for(v in v)"); $$ = stat3(IN, $3, $5, $8); }
270: ;
271:
272: %%
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