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