Annotation of parser3/src/main/compile.y, revision 1.59
1.24 paf 1: /*
1.59 ! paf 2: $Id: compile.y,v 1.58 2001/03/06 17:03:18 paf Exp $
1.24 paf 3: */
4:
1.1 paf 5: %{
1.9 paf 6: #define YYSTYPE Array/*<op>*/ *
7: #define YYPARSE_PARAM pc
8: #define YYLEX_PARAM pc
9: #define YYDEBUG 1
1.1 paf 10: #define YYERROR_VERBOSE
1.9 paf 11: #define yyerror(msg) real_yyerror((parse_control *)pc, msg)
12: #define YYPRINT(file, type, value) yyprint(file, type, value)
1.1 paf 13:
14: #include <stdio.h>
15: #include <string.h>
16: #include <stdlib.h>
17:
18: #include "compile_tools.h"
1.8 paf 19: #include "pa_value.h"
1.12 paf 20: #include "pa_request.h"
1.39 paf 21: #include "pa_vobject.h"
1.52 paf 22: #include "pa_vdouble.h"
1.39 paf 23:
24: #define SELF_NAME "self"
25: #define USES_NAME "USES"
1.1 paf 26:
1.9 paf 27: int real_yyerror(parse_control *pc, char *s);
28: static void yyprint(FILE *file, int type, YYSTYPE value);
1.1 paf 29: int yylex(YYSTYPE *lvalp, void *pc);
30:
31:
1.8 paf 32: // local convinient inplace typecast & var
1.9 paf 33: #define PC ((parse_control *)pc)
1.25 paf 34: #define POOL *PC->pool
35: #undef NEW
36: #define NEW new(POOL)
1.1 paf 37: %}
38:
39: %pure_parser
40:
1.13 paf 41: %token EON
1.4 paf 42: %token STRING
1.1 paf 43: %token BOGUS
1.55 paf 44:
1.58 paf 45: %token BAD_STRING_COMPARISON_OPERATOR
46:
1.59 ! paf 47: %token LAND "&&"
1.58 paf 48: %token LOR "||"
1.59 ! paf 49: %token LXOR "##"
1.58 paf 50:
51: %token NLE "<="
52: %token NGE ">="
53: %token NEQ "=="
54: %token NNE "!="
55:
56: %token SLT "lt"
57: %token SGT "gt"
58: %token SLE "le"
59: %token SGE "ge"
60: %token SEQ "eq"
61: %token SNE "ne"
62:
1.57 paf 63: /* logical */
1.59 ! paf 64: %left '<' '>' "<=" ">=" "##"
1.57 paf 65: %left "==" "!="
66: %left "||"
67: %left "&&"
68: %left NOT /* not: unary ! */
69:
70: /* bitwise */
1.59 ! paf 71: %left '#'
1.57 paf 72: %left '&' '|'
73: %left INV /* invertion: unary ~ */
74:
1.56 paf 75: /* numerical */
1.55 paf 76: %left '-' '+'
1.57 paf 77: %left '*' '/' '%'
1.56 paf 78: %left NEG /* negation: unary - */
1.1 paf 79:
80: %%
81:
1.10 paf 82: all:
83: one_big_piece {
1.25 paf 84: String& name_main=*NEW String(POOL);
1.11 paf 85: name_main.APPEND_CONST(MAIN_METHOD_NAME);
1.25 paf 86: Array& param_names=*NEW Array(POOL);
87: Array& local_names=*NEW Array(POOL);
1.34 paf 88: Method& method=*NEW Method(POOL, name_main, param_names, local_names, *$1);
89: PC->vclass->add_method(name_main, method);
1.10 paf 90: }
91: | methods;
92:
93: methods: method | methods method;
94: one_big_piece: maybe_codes;
95:
1.34 paf 96: method: control_method | code_method;
97:
98: control_method: '@' STRING '\n'
99: control_strings {
1.38 paf 100: String& name=*SLA2S($2);
1.34 paf 101: YYSTYPE strings_code=$4;
1.37 paf 102: if(strings_code->size()<1*2) {
103: strcpy(PC->error, "@");
104: strcat(PC->error, name.cstr());
105: strcat(PC->error, " is empty");
106: YYERROR;
107: }
1.36 paf 108: if(name==CLASS_NAME) {
1.34 paf 109: if(strings_code->size()==1*2)
1.38 paf 110: PC->vclass->set_name(*SLA2S(strings_code));
1.34 paf 111: else {
112: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
113: YYERROR;
114: }
115: } else {
1.36 paf 116: if(name==USES_NAME) {
1.34 paf 117: for(int i=0; i<strings_code->size(); i+=2) {
1.38 paf 118: String *file=SLA2S(strings_code, i);
1.35 paf 119: file->APPEND_CONST(".p");
120: PC->request->use(file->cstr(), 0);
1.34 paf 121: }
1.45 paf 122: } else if(name==BASE_NAME) {
123: if(strings_code->size()==1*2) {
124: String& base_name=*SLA2S(strings_code);
125: VClass *base=static_cast<VClass *>(
126: PC->request->classes().get(base_name));
127: if(!base) {
128: strcpy(PC->error, base_name.cstr());
129: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.34 paf 130: YYERROR;
131: }
1.45 paf 132: PC->vclass->set_base(*base);
133: } else {
134: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
135: YYERROR;
1.34 paf 136: }
137: } else {
1.36 paf 138: strcpy(PC->error, name.cstr());
1.34 paf 139: strcat(PC->error, ": invalid special name. valid names are "
1.45 paf 140: CLASS_NAME", "USES_NAME" and "BASE_NAME);
1.34 paf 141: YYERROR;
142: }
143: }
144: };
1.37 paf 145: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
146: control_string: maybe_string '\n';
147: maybe_string: empty | STRING;
1.34 paf 148:
149: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 150: maybe_codes {
1.38 paf 151: const String *name=SLA2S($2);
1.10 paf 152:
153: YYSTYPE params_names_code=$3;
1.25 paf 154: Array& params_names=*NEW Array(POOL);
1.10 paf 155: for(int i=0; i<params_names_code->size(); i+=2)
1.38 paf 156: params_names+=SLA2S(params_names_code, i);
1.10 paf 157:
158: YYSTYPE locals_names_code=$4;
1.25 paf 159: Array& locals_names=*NEW Array(POOL);
1.10 paf 160: for(int i=0; i<locals_names_code->size(); i+=2)
1.38 paf 161: locals_names+=SLA2S(locals_names_code, i);
1.10 paf 162:
1.34 paf 163: Method& method=*NEW Method(POOL, *name, params_names, locals_names, *$7);
164: PC->vclass->add_method(*name, method);
1.8 paf 165: };
1.10 paf 166:
167: maybe_bracketed_strings: empty | bracketed_maybe_strings;
168: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
169: maybe_strings: empty | strings;
170: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
171:
172: maybe_comment: empty | STRING;
1.1 paf 173:
174: /* codes */
175:
1.10 paf 176: maybe_codes: empty | codes;
177:
1.1 paf 178: codes: code | codes code {
179: $$=$1;
1.9 paf 180: P($$, $2);
1.1 paf 181: };
182: code: write_str_literal | action;
183: action: get | put | with | call;
184:
185: /* get */
186:
1.42 paf 187: get: '$' get_name {
1.1 paf 188: $$=$2; /* stack: resulting value */
1.54 paf 189: O($$, OP_WRITE); /* value=pop; write(value) */
1.1 paf 190: };
1.43 paf 191: get_name: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 192: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 193: name_without_curly_rdive:
194: name_without_curly_rdive_read
195: | name_without_curly_rdive_root
196: | name_without_curly_rdive_class;
1.19 paf 197: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 198: $$=N(POOL);
1.22 paf 199: Array *diving_code=$1;
1.38 paf 200: String *first_name=SLA2S(diving_code);
1.23 paf 201: if(first_name && *first_name==SELF_NAME) {
1.54 paf 202: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 203: P($$, diving_code,
204: /* skip over... */
205: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
206: } else {
1.54 paf 207: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 208: P($$, diving_code);
209: }
210: /* diving code; stack: current context */
1.1 paf 211: };
1.19 paf 212: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 213: $$=N(POOL);
1.54 paf 214: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 215: P($$, $2); /* diving code; stack: current context */
216: };
1.44 paf 217: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 218: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 219:
220: /* put */
221:
1.52 paf 222: put: '$' name_expr_wdive constructor_value {
1.20 paf 223: $$=$2; /* stack: context,name */
1.52 paf 224: P($$, $3); /* stack: context,name,constructor_value */
1.54 paf 225: O($$, OP_CONSTRUCT); /* value=pop; name=pop; context=pop; construct(context,name,value) */
1.20 paf 226: };
1.44 paf 227: name_expr_wdive:
228: name_expr_wdive_write
229: | name_expr_wdive_root
230: | name_expr_wdive_class;
1.28 paf 231: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 232: $$=N(POOL);
1.23 paf 233: Array *diving_code=$1;
1.38 paf 234: String *first_name=SLA2S(diving_code);
1.23 paf 235: if(first_name && *first_name==SELF_NAME) {
1.54 paf 236: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 237: P($$, diving_code,
238: /* skip over... */
239: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
240: } else {
1.54 paf 241: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 242: P($$, diving_code);
243: }
244: /* diving code; stack: current context */
1.20 paf 245: };
1.28 paf 246: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 247: $$=N(POOL);
1.54 paf 248: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 249: P($$, $2); /* diving code; stack: context,name */
1.1 paf 250: };
1.44 paf 251: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 252:
1.1 paf 253: constructor_value:
1.55 paf 254: '[' any_constructor_code_value ']' { $$=$2 }
1.56 paf 255: | '(' any_expr ')' { $$=$2 }
1.52 paf 256: ;
1.55 paf 257: any_constructor_code_value:
258: empty_string_value /* optimized $var[] case */
1.52 paf 259: | STRING /* optimized $var[STRING] case */
1.55 paf 260: | constructor_code_value /* $var[something complex] */
1.1 paf 261: ;
1.55 paf 262: constructor_code_value: constructor_code {
1.25 paf 263: $$=N(POOL);
1.54 paf 264: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.9 paf 265: P($$, $1); /* some codes to that context */
1.54 paf 266: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 267: };
1.55 paf 268: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 269: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
270:
1.1 paf 271: /* call */
272:
1.38 paf 273: call: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 274: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 275: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 276: P($$, $3); /* filling method_frame.store_params */
1.54 paf 277: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) */
1.1 paf 278: };
279:
1.43 paf 280: call_name: name_without_curly_rdive;
1.38 paf 281:
1.9 paf 282: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.1 paf 283: store_param: store_round_param | store_curly_param;
1.47 paf 284: store_round_param: '[' store_param_parts ']' {$$=$2};
1.31 paf 285: store_param_parts:
1.32 paf 286: store_param_part
287: | store_param_parts ';' store_param_part { $$=$1; P($$, $3) }
1.31 paf 288: ;
1.10 paf 289: store_curly_param: '{' maybe_codes '}' {
1.25 paf 290: $$=N(POOL);
1.29 paf 291: PCA($$, $2);
1.54 paf 292: O($$, OP_STORE_PARAM);
1.1 paf 293: };
1.32 paf 294: store_param_part:
1.33 paf 295: empty /* optimized () case */
296: | STRING { /* optimized (STRING) case */
1.32 paf 297: $$=$1;
1.54 paf 298: O($$, OP_STORE_PARAM);
1.32 paf 299: }
1.55 paf 300: | constructor_code_value { /* (something complex) */
1.32 paf 301: $$=$1;
1.54 paf 302: O($$, OP_STORE_PARAM);
1.32 paf 303: }
304: ;
1.1 paf 305:
306: /* name */
307:
1.20 paf 308: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 309:
1.9 paf 310: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 311: name_step: name_advance1 '.';
312: name_advance1: name_expr_value {
313: /* stack: context */
314: $$=$1; /* stack: context,name */
1.54 paf 315: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 316: };
317: name_advance2: name_expr_value {
318: /* stack: context */
319: $$=$1; /* stack: context,name */
1.54 paf 320: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 321: }
1.4 paf 322: | STRING BOGUS
1.1 paf 323: ;
324: name_expr_value:
1.4 paf 325: STRING /* subname_is_const */
1.1 paf 326: | name_expr_subvar_value /* $subname_is_var_value */
327: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
328: ;
329: name_expr_subvar_value: '$' subvar_ref_name_rdive {
330: $$=$2;
1.54 paf 331: O($$, OP_GET_ELEMENT);
1.1 paf 332: };
1.4 paf 333: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 334: $$=N(POOL);
1.54 paf 335: O($$, OP_CREATE_EWPOOL);
1.9 paf 336: P($$, $1);
1.54 paf 337: O($$, OP_WRITE);
1.9 paf 338: P($$, $2);
1.54 paf 339: O($$, OP_REDUCE_EWPOOL);
1.1 paf 340: };
1.18 paf 341: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
342: subvar_ref_name_rdive_read: STRING {
1.25 paf 343: $$=N(POOL);
1.54 paf 344: O($$, OP_WITH_READ);
1.9 paf 345: P($$, $1);
1.1 paf 346: };
1.18 paf 347: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 348: $$=N(POOL);
1.54 paf 349: O($$, OP_WITH_ROOT);
1.18 paf 350: P($$, $2);
351: };
1.9 paf 352: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 353: subvar__get_write: '$' subvar_ref_name_rdive {
354: $$=$2;
1.54 paf 355: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 356: };
357:
1.44 paf 358: class_prefix: STRING ':' {
1.42 paf 359: String& name=*SLA2S($1);
360: VClass *vclass=static_cast<VClass *>(PC->request->classes().get(name));
361: if(!vclass) {
362: strcpy(PC->error, "'");
363: strcat(PC->error, name.cstr());
364: strcat(PC->error, "' class is undefined in call");
365: YYERROR;
366: }
1.48 paf 367: //TODO: убрать зависимость от статических @USE, сделать имя, а не ссылку
1.42 paf 368: $$=CL(vclass); // vclass
1.1 paf 369: };
370:
371:
372: /* with */
373:
374: with: '$' name_without_curly_rdive '{' codes '}' {
375: $$=$2;
1.54 paf 376: O($$, OP_CREATE_RWPOOL);
1.9 paf 377: P($$, $4);
1.54 paf 378: O($$, OP_REDUCE_RWPOOL);
379: O($$, OP_WRITE);
1.1 paf 380: };
1.53 paf 381:
1.56 paf 382: /* expr */
1.53 paf 383:
1.56 paf 384: any_expr:
1.55 paf 385: empty_double_value /* optimized $var() case */
1.56 paf 386: | expr /* $var(something) */
1.53 paf 387: ;
1.56 paf 388: expr:
1.55 paf 389: number
1.57 paf 390: | '-' expr %prec NEG {
391: $$=$2; // stack: operand
392: O($$, OP_NEG); // value=-operand; stack: value
393: }
394: | '~' expr %prec INV {
395: $$=$2; // stack: operand
396: O($$, OP_INV); // value=~operand; stack: value
397: }
398: | '!' expr %prec NOT {
399: $$=$2; // stack: operand
400: O($$, OP_NOT); // value=!operand; stack: value
401: }
402: /*todo: def in fexists*/
403: | expr '-' expr {
1.55 paf 404: $$=$1; // stack: first operand
405: P($$, $3); // stack: first,second operands
1.57 paf 406: O($$, OP_SUB); // value=first-second; stack: value
1.55 paf 407: }
1.57 paf 408: | expr '+' expr {
1.55 paf 409: $$=$1; // stack: first operand
410: P($$, $3); // stack: first,second operands
1.57 paf 411: O($$, OP_ADD); // value=first+second; stack: value
1.55 paf 412: }
1.56 paf 413: | expr '*' expr {
1.53 paf 414: $$=$1; // stack: first operand
415: P($$, $3); // stack: first,second operands
1.54 paf 416: O($$, OP_MUL); // value=first*second; stack: value
1.55 paf 417: }
1.56 paf 418: | expr '/' expr {
1.55 paf 419: $$=$1; // stack: first operand
420: P($$, $3); // stack: first,second operands
1.56 paf 421: O($$, OP_DIV); // value=first/second; stack: value
422: }
1.57 paf 423: | expr '%' expr {
424: $$=$1; // stack: first operand
425: P($$, $3); // stack: first,second operands
426: O($$, OP_MOD); // value=first%second; stack: value
427: }
428: | expr '&' expr {
429: $$=$1; // stack: first operand
430: P($$, $3); // stack: first,second operands
431: O($$, OP_BIN_AND); // value=first&second; stack: value
432: }
433: | expr '|' expr {
434: $$=$1; // stack: first operand
435: P($$, $3); // stack: first,second operands
436: O($$, OP_BIN_OR); // value=first|second; stack: value
437: }
1.59 ! paf 438: | expr '#' expr {
! 439: $$=$1; // stack: first operand
! 440: P($$, $3); // stack: first,second operands
! 441: O($$, OP_BIN_XOR); // value=first^second; stack: value
! 442: }
1.57 paf 443: | expr "&&" expr {
444: $$=$1; // stack: first operand
445: P($$, $3); // stack: first,second operands
446: O($$, OP_LOG_AND); // value=first&&second; stack: value
447: }
448: | expr "||" expr {
449: $$=$1; // stack: first operand
450: P($$, $3); // stack: first,second operands
451: O($$, OP_LOG_OR); // value=first||second; stack: value
452: }
1.59 ! paf 453: | expr "##" expr {
! 454: $$=$1; // stack: first operand
! 455: P($$, $3); // stack: first,second operands
! 456: O($$, OP_LOG_XOR); // value=first^second; stack: value
! 457: }
1.57 paf 458: | expr '<' expr {
459: $$=$1; // stack: first operand
460: P($$, $3); // stack: first,second operands
461: O($$, OP_NUM_LT); // value=first<second; stack: value
462: }
463: | expr '>' expr {
464: $$=$1; // stack: first operand
465: P($$, $3); // stack: first,second operands
466: O($$, OP_NUM_GT); // value=first>second; stack: value
467: }
468: | expr "<=" expr {
469: $$=$1; // stack: first operand
470: P($$, $3); // stack: first,second operands
471: O($$, OP_NUM_LE); // value=first<=second; stack: value
472: }
473: | expr ">=" expr {
474: $$=$1; // stack: first operand
475: P($$, $3); // stack: first,second operands
476: O($$, OP_NUM_GE); // value=first>=second; stack: value
1.56 paf 477: }
1.57 paf 478: | expr "==" expr {
479: $$=$1; // stack: first operand
480: P($$, $3); // stack: first,second operands
481: O($$, OP_NUM_EQ); // value=first==second; stack: value
1.56 paf 482: }
1.57 paf 483: | expr "!=" expr {
484: $$=$1; // stack: first operand
485: P($$, $3); // stack: first,second operands
486: O($$, OP_NUM_NE); // value=first!=second; stack: value
1.56 paf 487: }
1.57 paf 488: /*
489: OP_STR_LT, OP_STR_GT, OP_STR_LE, OP_STR_GE, OP_STR_EQ, OP_STR_NE
490: */
1.56 paf 491: | '(' expr ')' { $$ = $2; }
492: ;
1.55 paf 493:
1.53 paf 494: /*
1.56 paf 495: complex_expr_value: complex_expr {
1.53 paf 496: $$=N(POOL);
1.54 paf 497: O($$, OP_CREATE_SWPOOL); /* stack: empty write context * /
1.53 paf 498: P($$, $1); /* some codes to that context * /
1.54 paf 499: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() * /
1.53 paf 500: };
501: */
1.1 paf 502:
1.27 paf 503: /* basics */
1.1 paf 504:
1.4 paf 505: write_str_literal: STRING {
1.59 ! paf 506: $$=$1;
! 507: O($$, OP_WRITE);
! 508: /*
! 509:
! 510: if(SLA2S($1)->size()) {
1.30 paf 511: $$=$1;
1.54 paf 512: O($$, OP_WRITE);
1.30 paf 513: } else {
514: // optimized case of special end of macro. see yylex
515: $$=N(POOL);
516: }
1.59 ! paf 517: */
1.26 paf 518: };
1.54 paf 519: number: STRING {
520: change_string_literal_to_double_literal($$=$1);
521: };
522:
1.55 paf 523: empty_double_value: /* empty */ { $$=VL(NEW VDouble(POOL)) };
524: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 525: empty: /* empty */ { $$=N(POOL) };
1.1 paf 526:
527: %%
528:
529: /*
530: 000$111(2222)00
531: 000$111{3333}00
1.9 paf 532: $,^: push,=0
1.1 paf 533: 1:( { break=pop
534: 2:( ) pop
535: 3:{ } pop
536:
537: 000^111(2222)4444{33333}4000
1.9 paf 538: $,^: push,=0
1.1 paf 539: 1:( { break=pop
540: 2:( )=4
541: 3:{ }=4
542: 4:[^({]=pop
543: */
544:
545: int yylex(YYSTYPE *lvalp, void *pc) {
546: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 547: #define RC {result=c; goto break2; }
1.1 paf 548:
549: register int c;
550: int result;
551:
552: if(PC->pending_state) {
553: result=PC->pending_state;
554: PC->pending_state=0;
555: return result;
556: }
557:
1.9 paf 558: char *begin=PC->source;
559: char *end;
560: int begin_line=PC->line;
1.58 paf 561: bool skip_analized_char=false;
1.50 paf 562: while(true) {
1.9 paf 563: c=*(end=(PC->source++));
1.1 paf 564:
1.4 paf 565: if(c=='\n') {
1.1 paf 566: PC->line++;
1.8 paf 567: PC->col=0;
1.10 paf 568: } else
1.4 paf 569: PC->col++;
1.1 paf 570:
1.48 paf 571: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
572: if(c=='^')
573: switch(*PC->source) {
574: case '^': case '$': case ';':
575: case '[': case ']':
576: case '{': case '}':
577: case '"':
1.40 paf 578: if(end!=begin) {
579: // append piece till ^
580: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
581: }
582: // reset piece 'start' position & line
583: begin=PC->source; // ^
1.9 paf 584: begin_line=PC->line;
1.40 paf 585: // skip over ^ and _
1.50 paf 586: PC->source++; PC->col++;
1.40 paf 587: // skip analysis = forced literal
1.1 paf 588: continue;
589: }
590: switch(PC->ls) {
1.10 paf 591:
592: // USER'S = NOT OURS
1.1 paf 593: case LS_USER:
1.48 paf 594: switch(c) {
595: case '$':
1.10 paf 596: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 597: RC;
598: case '^':
599: push_LS(PC, LS_METHOD_NAME);
600: RC;
601: case '@':
602: if(PC->col==0+1) {
603: push_LS(PC, LS_DEF_NAME);
604: RC;
605: }
606: break;
1.1 paf 607: }
1.48 paf 608: break;
609:
610: // STRING IN EXPRESSION
611: case LS_EXPRESSION_STRING:
612: switch(c) {
613: case '"':
614: pop_LS(PC); //"abc".
615: RC;
616: case '$':
617: push_LS(PC, LS_VAR_NAME_SIMPLE);
618: RC;
619: case '^':
1.10 paf 620: push_LS(PC, LS_METHOD_NAME);
1.48 paf 621: RC;
1.10 paf 622: }
623: break;
624:
625: // METHOD DEFINITION
626: case LS_DEF_NAME:
1.48 paf 627: switch(c) {
628: case '[':
1.10 paf 629: PC->ls=LS_DEF_PARAMS;
1.48 paf 630: RC;
631: case '\n':
632: PC->ls=LS_DEF_SPECIAL_BODY;
633: RC;
1.10 paf 634: }
635: break;
1.48 paf 636:
1.10 paf 637: case LS_DEF_PARAMS:
1.48 paf 638: switch(c) {
639: case ';':
640: RC;
641: case ']':
1.10 paf 642: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 643: RC;
1.49 paf 644: case '\n': // wrong. bailing out
1.10 paf 645: pop_LS(PC);
1.48 paf 646: RC;
1.10 paf 647: }
648: break;
1.48 paf 649:
1.10 paf 650: case LS_DEF_LOCALS:
1.48 paf 651: switch(c) {
652: case '[':
653: case ';':
654: RC;
655: case ']':
1.10 paf 656: PC->ls=LS_DEF_COMMENT;
1.48 paf 657: RC;
658: case '\n': // wrong. bailing out
1.10 paf 659: pop_LS(PC);
1.48 paf 660: RC;
1.10 paf 661: }
662: break;
1.48 paf 663:
1.10 paf 664: case LS_DEF_COMMENT:
665: if(c=='\n') {
666: pop_LS(PC);
1.48 paf 667: RC;
1.37 paf 668: }
669: break;
670:
1.48 paf 671: case LS_DEF_SPECIAL_BODY:
1.37 paf 672: if(c=='\n') {
1.48 paf 673: switch(*PC->source) {
674: case '@': case 0: // end of special_code
1.37 paf 675: pop_LS(PC);
1.48 paf 676: break;
677: }
678: RC;
679: }
680: break;
681:
682: // (EXPRESSION)
683: case LS_EXPRESSION_BODY:
684: switch(c) {
685: case ')':
686: if(--lexical_brackets_nestage==0)
687: pop_LS(PC); //(EXPRESSION).
688: RC;
689: case '$':
690: push_LS(PC, LS_VAR_NAME_IN_EXPRESSION);
691: RC;
692: case '^':
693: push_LS(PC, LS_METHOD_NAME);
694: RC;
695: case '(':
696: lexical_brackets_nestage++;
697: RC;
698: case '+': case '-': case '*': case '/': case '%':
1.58 paf 699: case '~':
1.48 paf 700: case ';':
701: RC;
1.59 ! paf 702: case '&': case '|': case '#':
1.58 paf 703: if(*PC->source==c) { // && ||
1.59 ! paf 704: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.58 paf 705: skip_analized_char=true;
706: } else
707: result=c;
708: goto break2;
709: case '<': case '>': case '=': case '!':
710: if(*PC->source=='=') { // <= >= == !=
711: skip_analized_char=true;
712: switch(c) {
713: case '<': result=NLE; break;
714: case '>': result=NGE; break;
715: case '=': result=NEQ; break;
716: case '!': result=NNE; break;
717: }
718: } else
719: result=c;
720: goto break2;
1.48 paf 721: case '"':
722: push_LS(PC, LS_EXPRESSION_STRING);
723: RC;
1.50 paf 724: case 'l': case 'g': case 'e': case 'n':
1.51 paf 725: if(end==begin) // right after whitespace
1.58 paf 726: switch(*PC->source) {
1.51 paf 727: // case '?': // ok [and bad cases, yacc would bark at them]
728: case 't': // lt gt [et nt]
1.58 paf 729: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
730: goto break2;
1.51 paf 731: case 'e': // le ge ne [ee]
1.58 paf 732: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
733: goto break2;
1.51 paf 734: case 'q': // eq [lq gq nq]
1.58 paf 735: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
736: goto break2;
1.50 paf 737: }
1.48 paf 738: break;
739: case ' ': case '\t': case '\n':
740: if(end!=begin) {
1.58 paf 741: // append piece till whitespace char
1.48 paf 742: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
743: }
744: // reset piece 'start' position & line
1.58 paf 745: begin=PC->source; // after whitespace char
1.48 paf 746: begin_line=PC->line;
747: continue;
1.1 paf 748: }
749: break;
750:
1.10 paf 751: // VARIABLE GET/PUT/WITH
1.1 paf 752: case LS_VAR_NAME_SIMPLE:
1.48 paf 753: case LS_VAR_NAME_IN_EXPRESSION:
754: if(PC->ls==LS_VAR_NAME_IN_EXPRESSION) {
1.56 paf 755: // name in expr ends also before binary operators
1.48 paf 756: switch(c) {
757: case '+': case '-': case '*': case '/': case '%':
758: case '&': case '|':
759: case '<': case '>': case '=': case '!':
760: pop_LS(PC);
761: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
762: result=EON;
763: goto break2;
764: }
765: }
766: switch(c) {
767: case 0:
768: case ' ': case '\t': case '\n':
769: case ';':
770: case ']': case '}':
1.1 paf 771: pop_LS(PC);
1.32 paf 772: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 773: result=EON;
1.1 paf 774: goto break2;
1.48 paf 775: case '[':
776: PC->ls=LS_VAR_SQUARE;
1.1 paf 777: lexical_brackets_nestage=1;
1.48 paf 778: RC;
779: case '{':
780: if(begin==end) { // ${name}, no need of EON, switching LS
781: PC->ls=LS_VAR_NAME_CURLY;
782: } else {
783: PC->ls=LS_VAR_CURLY;
784: lexical_brackets_nestage=1;
785: }
786:
787: RC;
788: case '(':
789: PC->ls=LS_EXPRESSION_BODY;
1.1 paf 790: lexical_brackets_nestage=1;
1.48 paf 791: RC;
792: case '.': // name part delim
793: case '$': // name part subvar
794: case ':': // ':name' or 'class:name'
795: RC;
1.1 paf 796: }
797: break;
1.48 paf 798:
1.1 paf 799: case LS_VAR_NAME_CURLY:
1.48 paf 800: switch(c) {
801: case '}': // ${name} finished, restoring LS
1.1 paf 802: pop_LS(PC);
1.48 paf 803: RC;
804: case '.': // name part delim
805: case '$': // name part subvar
806: case ':': // ':name' or 'class:name'
807: RC;
1.1 paf 808: }
809: break;
1.48 paf 810:
811: case LS_VAR_SQUARE:
812: switch(c) {
813: case '$':
1.10 paf 814: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 815: RC;
816: case '^':
1.10 paf 817: push_LS(PC, LS_METHOD_NAME);
1.48 paf 818: RC;
819: case ']':
1.1 paf 820: if(--lexical_brackets_nestage==0) {
821: pop_LS(PC);
1.48 paf 822: RC;
1.1 paf 823: }
1.48 paf 824: break;
825: case ';': // operator_or_fmt;value delim
826: RC;
827: case '[':
828: lexical_brackets_nestage++;
829: break;
1.1 paf 830: }
831: break;
1.48 paf 832:
1.1 paf 833: case LS_VAR_CURLY:
1.48 paf 834: switch(c) {
835: case '$':
1.10 paf 836: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 837: RC;
838: case '^':
1.10 paf 839: push_LS(PC, LS_METHOD_NAME);
1.48 paf 840: RC;
841: case '}':
1.1 paf 842: if(--lexical_brackets_nestage==0) {
843: pop_LS(PC);
1.48 paf 844: RC;
1.1 paf 845: }
1.48 paf 846: break;
847: case '{':
1.1 paf 848: lexical_brackets_nestage++;
1.48 paf 849: break;
850: }
1.1 paf 851: break;
852:
1.10 paf 853: // METHOD CALL
1.1 paf 854: case LS_METHOD_NAME:
1.48 paf 855: switch(c) {
856: case '[':
857: PC->ls=LS_METHOD_SQUARE;
1.1 paf 858: lexical_brackets_nestage=1;
1.48 paf 859: RC;
860: case '{':
1.1 paf 861: PC->ls=LS_METHOD_CURLY;
862: lexical_brackets_nestage=1;
1.48 paf 863: RC;
864: case '.': // name part delim
865: case '$': // name part subvar
866: case ':': // ':name' or 'class:name'
867: RC;
1.1 paf 868: }
869: break;
1.48 paf 870:
871: case LS_METHOD_SQUARE:
872: switch(c) {
873: case '$':
1.10 paf 874: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 875: RC;
876: case '^':
1.10 paf 877: push_LS(PC, LS_METHOD_NAME);
1.48 paf 878: RC;
879: case ';': // param delim
880: RC;
881: case ']':
1.1 paf 882: if(--lexical_brackets_nestage==0) {
883: PC->ls=LS_METHOD_AFTER;
1.48 paf 884: RC;
1.1 paf 885: }
1.48 paf 886: break;
887: case '[':
1.1 paf 888: lexical_brackets_nestage++;
1.48 paf 889: break;
890: }
1.1 paf 891: break;
1.48 paf 892:
1.1 paf 893: case LS_METHOD_CURLY:
1.48 paf 894: switch(c) {
895: case '$':
1.10 paf 896: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 897: RC;
898: case '^':
1.10 paf 899: push_LS(PC, LS_METHOD_NAME);
1.48 paf 900: RC;
901: case '}':
1.1 paf 902: if(--lexical_brackets_nestage==0) {
903: PC->ls=LS_METHOD_AFTER;
1.48 paf 904: RC;
1.1 paf 905: }
1.48 paf 906: break;
907: case '{':
1.1 paf 908: lexical_brackets_nestage++;
1.48 paf 909: break;
910: }
1.1 paf 911: break;
1.48 paf 912:
1.1 paf 913: case LS_METHOD_AFTER:
1.47 paf 914: if(c=='[') {/* )( }( */
1.48 paf 915: PC->ls=LS_METHOD_SQUARE;
1.1 paf 916: lexical_brackets_nestage=1;
1.48 paf 917: RC;
1.1 paf 918: }
919: if(c=='{') {/* ){ }{ */
920: PC->ls=LS_METHOD_CURLY;
921: lexical_brackets_nestage=1;
1.48 paf 922: RC;
1.1 paf 923: }
924: pop_LS(PC);
1.32 paf 925: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 926: result=EON;
1.1 paf 927: goto break2;
928: }
1.9 paf 929: if(c==0) {
1.1 paf 930: result=-1;
931: break;
932: }
933: }
934:
935: break2:
1.59 ! paf 936: if(end!=begin) { // there is last piece?
! 937: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
! 938: // strip last \n
1.10 paf 939: end--;
1.59 ! paf 940: }
! 941: if(end!=begin) { // last piece still alive?
! 942: // append it
1.30 paf 943: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
944: }
1.59 ! paf 945: }
! 946: if(PC->string->size()) { // something accumulated?
1.17 paf 947: // create STRING value: array of OP_VALUE+vstring
1.55 paf 948: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 949: // new pieces storage
1.25 paf 950: PC->string=NEW String(POOL);
1.58 paf 951: // make current result be pending for next call, return STRING for now
952: PC->pending_state=result; result=STRING;
953: }
954: if(skip_analized_char) {
955: PC->source++; PC->col++;
1.1 paf 956: }
1.58 paf 957: return result;
1.1 paf 958: }
959:
1.9 paf 960: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 961: {
1.16 paf 962: //fprintf(stderr, "[%s]\n", s);
1.6 paf 963:
1.46 paf 964: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 965: return 1;
966: }
967:
968: static void
1.9 paf 969: yyprint(
1.1 paf 970: FILE *file,
971: int type,
972: YYSTYPE value)
973: {
1.9 paf 974: if(type==STRING)
1.38 paf 975: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 976: }
977:
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to compile.y CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / main