Annotation of parser3/src/main/compile.y, revision 1.87
1.24 paf 1: /*
1.87 ! paf 2: Parser
! 3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
! 4: Author: Alexander Petrosyan <paf@design.ru>
! 5:
! 6: $Id: pa_string.C,v 1.35 2001/03/10 12:12:51 paf Exp $
1.24 paf 7: */
8:
1.1 paf 9: %{
1.9 paf 10: #define YYSTYPE Array/*<op>*/ *
11: #define YYPARSE_PARAM pc
12: #define YYLEX_PARAM pc
13: #define YYDEBUG 1
1.1 paf 14: #define YYERROR_VERBOSE
1.9 paf 15: #define yyerror(msg) real_yyerror((parse_control *)pc, msg)
16: #define YYPRINT(file, type, value) yyprint(file, type, value)
1.1 paf 17:
18: #include <stdio.h>
19: #include <string.h>
20: #include <stdlib.h>
21:
22: #include "compile_tools.h"
1.8 paf 23: #include "pa_value.h"
1.12 paf 24: #include "pa_request.h"
1.39 paf 25: #include "pa_vobject.h"
1.52 paf 26: #include "pa_vdouble.h"
1.85 paf 27: #include "core.h"
1.39 paf 28:
1.85 paf 29: #define SELF_ELEMENT_NAME "self"
30: #define USE_CONTROL_METHOD_NAME "USE"
1.1 paf 31:
1.9 paf 32: int real_yyerror(parse_control *pc, char *s);
33: static void yyprint(FILE *file, int type, YYSTYPE value);
1.1 paf 34: int yylex(YYSTYPE *lvalp, void *pc);
35:
36:
1.8 paf 37: // local convinient inplace typecast & var
1.9 paf 38: #define PC ((parse_control *)pc)
1.25 paf 39: #define POOL *PC->pool
40: #undef NEW
41: #define NEW new(POOL)
1.1 paf 42: %}
43:
44: %pure_parser
45:
1.13 paf 46: %token EON
1.4 paf 47: %token STRING
1.1 paf 48: %token BOGUS
1.55 paf 49:
1.58 paf 50: %token BAD_STRING_COMPARISON_OPERATOR
51:
1.59 paf 52: %token LAND "&&"
1.58 paf 53: %token LOR "||"
1.59 paf 54: %token LXOR "##"
1.58 paf 55:
56: %token NLE "<="
57: %token NGE ">="
58: %token NEQ "=="
59: %token NNE "!="
60:
61: %token SLT "lt"
62: %token SGT "gt"
63: %token SLE "le"
64: %token SGE "ge"
65: %token SEQ "eq"
66: %token SNE "ne"
67:
1.67 paf 68: %token DEF "def"
69: %token IN "in"
70: %token FEXISTS "-f"
71:
1.57 paf 72: /* logical */
1.61 paf 73: %left "lt" "gt" "le" "ge"
74: %left "eq" "ne"
1.59 paf 75: %left '<' '>' "<=" ">=" "##"
1.57 paf 76: %left "==" "!="
77: %left "||"
78: %left "&&"
1.67 paf 79: %left "def" "in" "-f"
1.68 paf 80: %left '!'
1.57 paf 81:
82: /* bitwise */
1.59 paf 83: %left '#'
1.57 paf 84: %left '&' '|'
1.68 paf 85: %left '~'
1.57 paf 86:
1.56 paf 87: /* numerical */
1.55 paf 88: %left '-' '+'
1.57 paf 89: %left '*' '/' '%'
1.56 paf 90: %left NEG /* negation: unary - */
1.1 paf 91:
92: %%
93:
1.74 paf 94: all: /* TODO: у ^execute непременно задать какой-то name, см. 'RUN' */
1.10 paf 95: one_big_piece {
1.75 paf 96: Method& method=*NEW Method(POOL,
1.85 paf 97: *main_method_name,
1.81 paf 98: 0, 0, /*min, max numbered_params_count*/
1.75 paf 99: 0/*param_names*/, 0/*local_names*/,
100: $1/*parser_code*/, 0/*native_code*/);
1.85 paf 101: PC->vclass->add_method(*main_method_name, method);
1.10 paf 102: }
103: | methods;
104:
105: methods: method | methods method;
106: one_big_piece: maybe_codes;
107:
1.34 paf 108: method: control_method | code_method;
109:
110: control_method: '@' STRING '\n'
111: control_strings {
1.82 paf 112: const String& command=*SLA2S($2);
1.34 paf 113: YYSTYPE strings_code=$4;
1.37 paf 114: if(strings_code->size()<1*2) {
115: strcpy(PC->error, "@");
1.74 paf 116: strcat(PC->error, command.cstr());
1.37 paf 117: strcat(PC->error, " is empty");
118: YYERROR;
119: }
1.74 paf 120: if(command==CLASS_NAME) {
1.76 paf 121: if(PC->vclass!=&PC->request->root_class) { // already changed from default?
1.73 paf 122: strcpy(PC->error, "class already have a name '");
123: strncat(PC->error, PC->vclass->name().cstr(), 100);
124: strcat(PC->error, "'");
125: YYERROR;
126: }
127: if(strings_code->size()==1*2) {
128: // new class' name
1.82 paf 129: const String *name=SLA2S(strings_code);
1.73 paf 130: // creating the class
131: PC->vclass=NEW VClass(POOL);
132: PC->vclass->set_name(*name);
133: // defaulting base. may change with @BASE
1.76 paf 134: PC->vclass->set_base(PC->request->root_class);
1.73 paf 135: // append to request's classes
136: PC->request->classes_array()+=PC->vclass;
137: PC->request->classes().put(*name, PC->vclass);
138: } else {
1.34 paf 139: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
140: YYERROR;
141: }
142: } else {
1.85 paf 143: if(command==USE_CONTROL_METHOD_NAME) {
1.34 paf 144: for(int i=0; i<strings_code->size(); i+=2) {
1.82 paf 145: String file(*SLA2S(strings_code, i));
146: file.APPEND_CONST(".p");
1.86 paf 147: PC->request->use(file.cstr());
1.34 paf 148: }
1.74 paf 149: } else if(command==BASE_NAME) {
1.76 paf 150: if(PC->vclass->base()!=&PC->request->root_class) { // already changed from default?
1.86 paf 151: strcpy(PC->error, "class already have a base '");
152: strncat(PC->error, PC->vclass->base()->name().cstr(), 100);
153: strcat(PC->error, "'");
1.73 paf 154: YYERROR;
155: }
1.45 paf 156: if(strings_code->size()==1*2) {
1.73 paf 157: // TODO: преодолеть self и циклические base
1.82 paf 158: const String& base_name=*SLA2S(strings_code);
1.45 paf 159: VClass *base=static_cast<VClass *>(
160: PC->request->classes().get(base_name));
161: if(!base) {
162: strcpy(PC->error, base_name.cstr());
163: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.34 paf 164: YYERROR;
165: }
1.45 paf 166: PC->vclass->set_base(*base);
167: } else {
168: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
169: YYERROR;
1.34 paf 170: }
171: } else {
1.74 paf 172: strcpy(PC->error, command.cstr());
1.34 paf 173: strcat(PC->error, ": invalid special name. valid names are "
1.85 paf 174: CLASS_NAME", "USE_CONTROL_METHOD_NAME" and "BASE_NAME);
1.34 paf 175: YYERROR;
176: }
177: }
178: };
1.37 paf 179: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
180: control_string: maybe_string '\n';
181: maybe_string: empty | STRING;
1.34 paf 182:
183: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 184: maybe_codes {
1.38 paf 185: const String *name=SLA2S($2);
1.10 paf 186:
187: YYSTYPE params_names_code=$3;
1.75 paf 188: Array *params_names=0;
189: if(int size=params_names_code->size()) {
190: params_names=NEW Array(POOL);
191: for(int i=0; i<size; i+=2)
192: *params_names+=SLA2S(params_names_code, i);
193: }
1.10 paf 194:
195: YYSTYPE locals_names_code=$4;
1.75 paf 196: Array *locals_names=0;
197: if(int size=locals_names_code->size()) {
198: locals_names=NEW Array(POOL);
199: for(int i=0; i<size; i+=2)
200: *locals_names+=SLA2S(locals_names_code, i);
201: }
1.10 paf 202:
1.76 paf 203: Method& method=*NEW Method(POOL,
204: *name,
1.81 paf 205: 0, 0/*min,max numbered_params_count*/,
1.76 paf 206: params_names, locals_names,
207: $7, 0);
1.34 paf 208: PC->vclass->add_method(*name, method);
1.8 paf 209: };
1.10 paf 210:
211: maybe_bracketed_strings: empty | bracketed_maybe_strings;
212: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
213: maybe_strings: empty | strings;
214: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
215:
216: maybe_comment: empty | STRING;
1.1 paf 217:
218: /* codes */
219:
1.10 paf 220: maybe_codes: empty | codes;
221:
1.1 paf 222: codes: code | codes code {
223: $$=$1;
1.9 paf 224: P($$, $2);
1.1 paf 225: };
1.81 paf 226: code: write_string | action;
1.1 paf 227: action: get | put | with | call;
228:
229: /* get */
230:
1.64 paf 231: get: get_value {
232: $$=$1; /* stack: resulting value */
1.66 paf 233: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
1.1 paf 234: };
1.64 paf 235: get_value: '$' get_name_value { $$=$2 }
236: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 237: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 238: name_without_curly_rdive:
239: name_without_curly_rdive_read
240: | name_without_curly_rdive_root
241: | name_without_curly_rdive_class;
1.19 paf 242: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 243: $$=N(POOL);
1.22 paf 244: Array *diving_code=$1;
1.82 paf 245: const String *first_name=SLA2S(diving_code);
1.85 paf 246: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 247: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 248: P($$, diving_code,
249: /* skip over... */
250: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
251: } else {
1.54 paf 252: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 253: P($$, diving_code);
254: }
255: /* diving code; stack: current context */
1.1 paf 256: };
1.19 paf 257: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 258: $$=N(POOL);
1.54 paf 259: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 260: P($$, $2); /* diving code; stack: current context */
261: };
1.44 paf 262: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 263: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 264:
265: /* put */
266:
1.81 paf 267: put: '$' name_expr_wdive construct {
1.20 paf 268: $$=$2; /* stack: context,name */
1.52 paf 269: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 270: };
1.44 paf 271: name_expr_wdive:
272: name_expr_wdive_write
273: | name_expr_wdive_root
274: | name_expr_wdive_class;
1.28 paf 275: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 276: $$=N(POOL);
1.23 paf 277: Array *diving_code=$1;
1.82 paf 278: const String *first_name=SLA2S(diving_code);
1.85 paf 279: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 280: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 281: P($$, diving_code,
282: /* skip over... */
283: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
284: } else {
1.54 paf 285: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 286: P($$, diving_code);
287: }
288: /* diving code; stack: current context */
1.20 paf 289: };
1.28 paf 290: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 291: $$=N(POOL);
1.54 paf 292: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 293: P($$, $2); /* diving code; stack: context,name */
1.1 paf 294: };
1.44 paf 295: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 296:
1.81 paf 297: construct: construct_by_code | construct_by_expr;
298: construct_by_code: '[' any_constructor_code_value ']' {
299: $$=$2; /* stack: context, name, value */
300: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
301: }
302: ;
303: construct_by_expr: '(' any_expr ')' {
304: $$=$2; /* stack: context, name, value */
305: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
306: }
1.52 paf 307: ;
1.55 paf 308: any_constructor_code_value:
309: empty_string_value /* optimized $var[] case */
1.52 paf 310: | STRING /* optimized $var[STRING] case */
1.55 paf 311: | constructor_code_value /* $var[something complex] */
1.1 paf 312: ;
1.55 paf 313: constructor_code_value: constructor_code {
1.25 paf 314: $$=N(POOL);
1.54 paf 315: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 316: P($$, $1); /* some code that writes to that context */
1.54 paf 317: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 318: };
1.55 paf 319: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 320: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
321:
1.1 paf 322: /* call */
323:
1.66 paf 324: call: call_value {
325: $$=$1; /* stack: value */
326: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
327: };
328: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 329: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 330: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 331: P($$, $3); /* filling method_frame.store_params */
1.66 paf 332: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 333: };
334:
1.43 paf 335: call_name: name_without_curly_rdive;
1.38 paf 336:
1.9 paf 337: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 338: store_param:
339: store_square_param
340: | store_round_param
341: | store_curly_param
1.31 paf 342: ;
1.69 paf 343: store_square_param: '[' store_code_param_parts ']' {$$=$2};
344: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.10 paf 345: store_curly_param: '{' maybe_codes '}' {
1.25 paf 346: $$=N(POOL);
1.29 paf 347: PCA($$, $2);
1.1 paf 348: };
1.69 paf 349: store_code_param_parts:
350: store_code_param_part
351: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
352: ;
353: store_expr_param_parts:
354: store_expr_param_part
355: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
356: ;
357: store_code_param_part:
1.78 paf 358: empty /* optimized [] case */
359: | STRING { /* optimized [STRING] case */
1.32 paf 360: $$=$1;
1.54 paf 361: O($$, OP_STORE_PARAM);
1.32 paf 362: }
1.78 paf 363: | constructor_code_value { /* [something complex] */
1.32 paf 364: $$=$1;
1.77 paf 365: O($$, OP_STORE_PARAM);
1.32 paf 366: }
367: ;
1.69 paf 368: store_expr_param_part: write_expr_value {
369: $$=N(POOL);
370: PCA($$, $1);
371: };
372: write_expr_value: any_expr {
373: $$=$1;
374: O($$, OP_WRITE);
375: };
1.1 paf 376:
377: /* name */
378:
1.20 paf 379: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 380:
1.9 paf 381: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 382: name_step: name_advance1 '.';
383: name_advance1: name_expr_value {
384: /* stack: context */
385: $$=$1; /* stack: context,name */
1.54 paf 386: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 387: };
388: name_advance2: name_expr_value {
389: /* stack: context */
390: $$=$1; /* stack: context,name */
1.54 paf 391: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 392: }
1.4 paf 393: | STRING BOGUS
1.1 paf 394: ;
395: name_expr_value:
1.4 paf 396: STRING /* subname_is_const */
1.1 paf 397: | name_expr_subvar_value /* $subname_is_var_value */
398: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
399: ;
400: name_expr_subvar_value: '$' subvar_ref_name_rdive {
401: $$=$2;
1.54 paf 402: O($$, OP_GET_ELEMENT);
1.1 paf 403: };
1.4 paf 404: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 405: $$=N(POOL);
1.54 paf 406: O($$, OP_CREATE_EWPOOL);
1.9 paf 407: P($$, $1);
1.54 paf 408: O($$, OP_WRITE);
1.9 paf 409: P($$, $2);
1.54 paf 410: O($$, OP_REDUCE_EWPOOL);
1.1 paf 411: };
1.18 paf 412: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
413: subvar_ref_name_rdive_read: STRING {
1.25 paf 414: $$=N(POOL);
1.54 paf 415: O($$, OP_WITH_READ);
1.9 paf 416: P($$, $1);
1.1 paf 417: };
1.18 paf 418: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 419: $$=N(POOL);
1.54 paf 420: O($$, OP_WITH_ROOT);
1.18 paf 421: P($$, $2);
422: };
1.9 paf 423: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 424: subvar__get_write: '$' subvar_ref_name_rdive {
425: $$=$2;
1.54 paf 426: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 427: };
428:
1.44 paf 429: class_prefix: STRING ':' {
1.72 paf 430: $$=$1; // stack: class name string
431: O($$, OP_GET_CLASS);
1.1 paf 432: };
433:
434:
435: /* with */
436:
437: with: '$' name_without_curly_rdive '{' codes '}' {
438: $$=$2;
1.54 paf 439: O($$, OP_CREATE_RWPOOL);
1.9 paf 440: P($$, $4);
1.54 paf 441: O($$, OP_REDUCE_RWPOOL);
442: O($$, OP_WRITE);
1.1 paf 443: };
1.53 paf 444:
1.56 paf 445: /* expr */
1.53 paf 446:
1.56 paf 447: any_expr:
1.55 paf 448: empty_double_value /* optimized $var() case */
1.81 paf 449: | expr_value /* $var(something) */
1.53 paf 450: ;
1.81 paf 451: expr_value: expr {
452: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 453: change_string_literal_to_double_literal($$); // make that string literal Double
454: };
1.56 paf 455: expr:
1.62 paf 456: STRING
1.64 paf 457: | get_value
1.66 paf 458: | call_value
1.64 paf 459: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 460: | '(' expr ')' { $$ = $2; }
461: /* stack: operand // stack: @operand */
462: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 463: | '~' expr { $$=$2; O($$, OP_INV) }
464: | '!' expr { $$=$2; O($$, OP_NOT) }
465: | "def" expr { $$=$2; O($$, OP_DEF) }
466: | "in" expr { $$=$2; O($$, OP_IN) }
467: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 468: /* stack: a,b // stack: a@b */
469: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
470: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
471: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
472: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
473: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
474: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
475: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
476: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
477: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
478: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
479: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
480: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
481: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
482: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
483: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
484: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
485: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 486: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
487: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
488: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
489: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
490: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
491: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.56 paf 492: ;
1.55 paf 493:
1.65 paf 494: string_inside_quotes_value: maybe_codes {
1.64 paf 495: $$=N(POOL);
496: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 497: P($$, $1); /* some code that writes to that context */
1.64 paf 498: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 499: };
1.1 paf 500:
1.27 paf 501: /* basics */
1.1 paf 502:
1.81 paf 503: write_string: STRING {
1.84 paf 504: // optimized from OP_STRING+OP_WRITE to OP_STRING__WRITE
505: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 506: };
507:
1.79 paf 508: empty_double_value: /* empty */ { $$=VL(NEW VDouble(POOL, 0)) };
1.81 paf 509: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 510: empty: /* empty */ { $$=N(POOL) };
1.1 paf 511:
512: %%
513:
514: /*
515: 000$111(2222)00
516: 000$111{3333}00
1.9 paf 517: $,^: push,=0
1.1 paf 518: 1:( { break=pop
519: 2:( ) pop
520: 3:{ } pop
521:
522: 000^111(2222)4444{33333}4000
1.9 paf 523: $,^: push,=0
1.1 paf 524: 1:( { break=pop
525: 2:( )=4
526: 3:{ }=4
527: 4:[^({]=pop
528: */
529:
530: int yylex(YYSTYPE *lvalp, void *pc) {
531: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 532: #define RC {result=c; goto break2; }
1.1 paf 533:
534: register int c;
535: int result;
536:
537: if(PC->pending_state) {
538: result=PC->pending_state;
539: PC->pending_state=0;
540: return result;
541: }
542:
1.9 paf 543: char *begin=PC->source;
544: char *end;
545: int begin_line=PC->line;
1.67 paf 546: int skip_analized=0;
1.50 paf 547: while(true) {
1.9 paf 548: c=*(end=(PC->source++));
1.1 paf 549:
1.4 paf 550: if(c=='\n') {
1.1 paf 551: PC->line++;
1.8 paf 552: PC->col=0;
1.10 paf 553: } else
1.4 paf 554: PC->col++;
1.73 paf 555:
556: // todo: # in 0+1 column comment
1.1 paf 557:
1.48 paf 558: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
559: if(c=='^')
560: switch(*PC->source) {
561: case '^': case '$': case ';':
562: case '[': case ']':
563: case '{': case '}':
564: case '"':
1.40 paf 565: if(end!=begin) {
566: // append piece till ^
567: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
568: }
1.63 paf 569: // reset piece 'begin' position & line
1.40 paf 570: begin=PC->source; // ^
1.9 paf 571: begin_line=PC->line;
1.40 paf 572: // skip over ^ and _
1.50 paf 573: PC->source++; PC->col++;
1.40 paf 574: // skip analysis = forced literal
1.1 paf 575: continue;
576: }
577: switch(PC->ls) {
1.10 paf 578:
579: // USER'S = NOT OURS
1.1 paf 580: case LS_USER:
1.48 paf 581: switch(c) {
582: case '$':
1.10 paf 583: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 584: RC;
585: case '^':
586: push_LS(PC, LS_METHOD_NAME);
587: RC;
588: case '@':
589: if(PC->col==0+1) {
590: push_LS(PC, LS_DEF_NAME);
591: RC;
592: }
593: break;
1.1 paf 594: }
1.48 paf 595: break;
596:
597: // STRING IN EXPRESSION
598: case LS_EXPRESSION_STRING:
599: switch(c) {
600: case '"':
601: pop_LS(PC); //"abc".
602: RC;
603: case '$':
604: push_LS(PC, LS_VAR_NAME_SIMPLE);
605: RC;
606: case '^':
1.10 paf 607: push_LS(PC, LS_METHOD_NAME);
1.48 paf 608: RC;
1.10 paf 609: }
610: break;
611:
612: // METHOD DEFINITION
613: case LS_DEF_NAME:
1.48 paf 614: switch(c) {
615: case '[':
1.10 paf 616: PC->ls=LS_DEF_PARAMS;
1.48 paf 617: RC;
618: case '\n':
619: PC->ls=LS_DEF_SPECIAL_BODY;
620: RC;
1.10 paf 621: }
622: break;
1.48 paf 623:
1.10 paf 624: case LS_DEF_PARAMS:
1.48 paf 625: switch(c) {
626: case ';':
627: RC;
628: case ']':
1.10 paf 629: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 630: RC;
1.49 paf 631: case '\n': // wrong. bailing out
1.10 paf 632: pop_LS(PC);
1.48 paf 633: RC;
1.10 paf 634: }
635: break;
1.48 paf 636:
1.10 paf 637: case LS_DEF_LOCALS:
1.48 paf 638: switch(c) {
639: case '[':
640: case ';':
641: RC;
642: case ']':
1.10 paf 643: PC->ls=LS_DEF_COMMENT;
1.48 paf 644: RC;
645: case '\n': // wrong. bailing out
1.10 paf 646: pop_LS(PC);
1.48 paf 647: RC;
1.10 paf 648: }
649: break;
1.48 paf 650:
1.10 paf 651: case LS_DEF_COMMENT:
652: if(c=='\n') {
653: pop_LS(PC);
1.48 paf 654: RC;
1.37 paf 655: }
656: break;
657:
1.48 paf 658: case LS_DEF_SPECIAL_BODY:
1.37 paf 659: if(c=='\n') {
1.48 paf 660: switch(*PC->source) {
661: case '@': case 0: // end of special_code
1.37 paf 662: pop_LS(PC);
1.48 paf 663: break;
664: }
665: RC;
666: }
667: break;
668:
669: // (EXPRESSION)
1.69 paf 670: case LS_VAR_ROUND:
671: case LS_METHOD_ROUND:
1.48 paf 672: switch(c) {
673: case ')':
674: if(--lexical_brackets_nestage==0)
1.69 paf 675: if(PC->ls==LS_METHOD_ROUND) // method round param ended
676: PC->ls=LS_METHOD_AFTER; // look for method end
677: else // PC->ls==LS_VAR_ROUND // variable constructor ended
678: pop_LS(PC); // return to normal life
1.48 paf 679: RC;
680: case '$':
1.69 paf 681: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 682: RC;
683: case '^':
684: push_LS(PC, LS_METHOD_NAME);
685: RC;
686: case '(':
687: lexical_brackets_nestage++;
688: RC;
1.67 paf 689: case '-':
690: if(*PC->source=='f') { // -f
691: skip_analized=1;
692: result=FEXISTS;
693: } else
694: result=c;
695: goto break2;
696: case '+': case '*': case '/': case '%':
1.58 paf 697: case '~':
1.48 paf 698: case ';':
699: RC;
1.59 paf 700: case '&': case '|': case '#':
1.58 paf 701: if(*PC->source==c) { // && ||
1.59 paf 702: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 703: skip_analized=1;
1.58 paf 704: } else
705: result=c;
706: goto break2;
707: case '<': case '>': case '=': case '!':
708: if(*PC->source=='=') { // <= >= == !=
1.67 paf 709: skip_analized=1;
1.58 paf 710: switch(c) {
711: case '<': result=NLE; break;
712: case '>': result=NGE; break;
713: case '=': result=NEQ; break;
714: case '!': result=NNE; break;
715: }
716: } else
717: result=c;
718: goto break2;
1.48 paf 719: case '"':
720: push_LS(PC, LS_EXPRESSION_STRING);
721: RC;
1.50 paf 722: case 'l': case 'g': case 'e': case 'n':
1.51 paf 723: if(end==begin) // right after whitespace
1.58 paf 724: switch(*PC->source) {
1.51 paf 725: // case '?': // ok [and bad cases, yacc would bark at them]
726: case 't': // lt gt [et nt]
1.62 paf 727: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 728: skip_analized=1;
1.58 paf 729: goto break2;
1.51 paf 730: case 'e': // le ge ne [ee]
1.58 paf 731: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 732: skip_analized=1;
1.58 paf 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;
1.67 paf 736: skip_analized=1;
737: goto break2;
738: }
739: break;
740: case 'i':
741: if(end==begin) // right after whitespace
742: if(PC->source[0]=='n') { // in
743: skip_analized=1;
744: result=IN;
745: goto break2;
746: }
747: break;
748: case 'd':
749: if(end==begin) // right after whitespace
750: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
751: skip_analized=2;
752: result=DEF;
1.58 paf 753: goto break2;
1.50 paf 754: }
1.48 paf 755: break;
756: case ' ': case '\t': case '\n':
1.63 paf 757: if(end!=begin) { // there were a string after previous operator?
758: result=0; // return that string
759: goto break2;
1.48 paf 760: }
1.63 paf 761: // that's a leading|traling space or after-operator-space
762: // ignoring it
763: // reset piece 'begin' position & line
1.58 paf 764: begin=PC->source; // after whitespace char
1.48 paf 765: begin_line=PC->line;
766: continue;
1.1 paf 767: }
768: break;
769:
1.10 paf 770: // VARIABLE GET/PUT/WITH
1.1 paf 771: case LS_VAR_NAME_SIMPLE:
1.69 paf 772: case LS_EXPRESSION_VAR_NAME:
773: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 774: // name in expr ends also before binary operators
1.48 paf 775: switch(c) {
776: case '+': case '-': case '*': case '/': case '%':
777: case '&': case '|':
1.83 paf 778: case '=': case '!':
1.48 paf 779: pop_LS(PC);
780: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
781: result=EON;
782: goto break2;
783: }
784: }
785: switch(c) {
786: case 0:
787: case ' ': case '\t': case '\n':
788: case ';':
1.64 paf 789: case ']': case '}': case ')': case '"':
1.83 paf 790: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.1 paf 791: pop_LS(PC);
1.32 paf 792: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 793: result=EON;
1.1 paf 794: goto break2;
1.48 paf 795: case '[':
796: PC->ls=LS_VAR_SQUARE;
1.1 paf 797: lexical_brackets_nestage=1;
1.48 paf 798: RC;
799: case '{':
800: if(begin==end) { // ${name}, no need of EON, switching LS
801: PC->ls=LS_VAR_NAME_CURLY;
802: } else {
803: PC->ls=LS_VAR_CURLY;
804: lexical_brackets_nestage=1;
805: }
1.69 paf 806:
1.48 paf 807: RC;
808: case '(':
1.69 paf 809: PC->ls=LS_VAR_ROUND;
1.1 paf 810: lexical_brackets_nestage=1;
1.48 paf 811: RC;
812: case '.': // name part delim
813: case '$': // name part subvar
814: case ':': // ':name' or 'class:name'
815: RC;
1.1 paf 816: }
817: break;
1.48 paf 818:
1.1 paf 819: case LS_VAR_NAME_CURLY:
1.48 paf 820: switch(c) {
821: case '}': // ${name} finished, restoring LS
1.1 paf 822: pop_LS(PC);
1.48 paf 823: RC;
824: case '.': // name part delim
825: case '$': // name part subvar
826: case ':': // ':name' or 'class:name'
827: RC;
1.1 paf 828: }
829: break;
1.48 paf 830:
831: case LS_VAR_SQUARE:
832: switch(c) {
833: case '$':
1.10 paf 834: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 835: RC;
836: case '^':
1.10 paf 837: push_LS(PC, LS_METHOD_NAME);
1.48 paf 838: RC;
839: case ']':
1.1 paf 840: if(--lexical_brackets_nestage==0) {
841: pop_LS(PC);
1.48 paf 842: RC;
1.1 paf 843: }
1.48 paf 844: break;
845: case ';': // operator_or_fmt;value delim
846: RC;
847: case '[':
848: lexical_brackets_nestage++;
849: break;
1.1 paf 850: }
851: break;
1.48 paf 852:
1.1 paf 853: case LS_VAR_CURLY:
1.48 paf 854: switch(c) {
855: case '$':
1.10 paf 856: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 857: RC;
858: case '^':
1.10 paf 859: push_LS(PC, LS_METHOD_NAME);
1.48 paf 860: RC;
861: case '}':
1.1 paf 862: if(--lexical_brackets_nestage==0) {
863: pop_LS(PC);
1.48 paf 864: RC;
1.1 paf 865: }
1.48 paf 866: break;
867: case '{':
1.1 paf 868: lexical_brackets_nestage++;
1.48 paf 869: break;
870: }
1.1 paf 871: break;
872:
1.10 paf 873: // METHOD CALL
1.1 paf 874: case LS_METHOD_NAME:
1.48 paf 875: switch(c) {
876: case '[':
877: PC->ls=LS_METHOD_SQUARE;
1.1 paf 878: lexical_brackets_nestage=1;
1.48 paf 879: RC;
880: case '{':
1.1 paf 881: PC->ls=LS_METHOD_CURLY;
882: lexical_brackets_nestage=1;
1.48 paf 883: RC;
1.69 paf 884: case '(':
885: PC->ls=LS_METHOD_ROUND;
886: lexical_brackets_nestage=1;
887: RC;
1.48 paf 888: case '.': // name part delim
889: case '$': // name part subvar
890: case ':': // ':name' or 'class:name'
891: RC;
1.1 paf 892: }
893: break;
1.48 paf 894:
895: case LS_METHOD_SQUARE:
896: switch(c) {
897: case '$':
1.10 paf 898: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 899: RC;
900: case '^':
1.10 paf 901: push_LS(PC, LS_METHOD_NAME);
1.48 paf 902: RC;
903: case ';': // param delim
904: RC;
905: case ']':
1.1 paf 906: if(--lexical_brackets_nestage==0) {
907: PC->ls=LS_METHOD_AFTER;
1.48 paf 908: RC;
1.1 paf 909: }
1.48 paf 910: break;
911: case '[':
1.1 paf 912: lexical_brackets_nestage++;
1.48 paf 913: break;
914: }
1.1 paf 915: break;
1.48 paf 916:
1.1 paf 917: case LS_METHOD_CURLY:
1.48 paf 918: switch(c) {
919: case '$':
1.10 paf 920: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 921: RC;
922: case '^':
1.10 paf 923: push_LS(PC, LS_METHOD_NAME);
1.48 paf 924: RC;
925: case '}':
1.1 paf 926: if(--lexical_brackets_nestage==0) {
927: PC->ls=LS_METHOD_AFTER;
1.48 paf 928: RC;
1.1 paf 929: }
1.48 paf 930: break;
931: case '{':
1.1 paf 932: lexical_brackets_nestage++;
1.48 paf 933: break;
934: }
1.1 paf 935: break;
1.48 paf 936:
1.1 paf 937: case LS_METHOD_AFTER:
1.69 paf 938: if(c=='[') {/* ][ }[ )[ */
1.48 paf 939: PC->ls=LS_METHOD_SQUARE;
1.1 paf 940: lexical_brackets_nestage=1;
1.48 paf 941: RC;
1.1 paf 942: }
1.69 paf 943: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 944: PC->ls=LS_METHOD_CURLY;
1.69 paf 945: lexical_brackets_nestage=1;
946: RC;
947: }
948: if(c=='(') {/* ]( }( )( */
949: PC->ls=LS_METHOD_ROUND;
1.1 paf 950: lexical_brackets_nestage=1;
1.48 paf 951: RC;
1.1 paf 952: }
953: pop_LS(PC);
1.32 paf 954: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 955: result=EON;
1.1 paf 956: goto break2;
957: }
1.9 paf 958: if(c==0) {
1.1 paf 959: result=-1;
960: break;
961: }
962: }
963:
964: break2:
1.59 paf 965: if(end!=begin) { // there is last piece?
966: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
967: // strip last \n
1.10 paf 968: end--;
1.59 paf 969: }
970: if(end!=begin) { // last piece still alive?
971: // append it
1.30 paf 972: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
973: }
1.59 paf 974: }
975: if(PC->string->size()) { // something accumulated?
1.17 paf 976: // create STRING value: array of OP_VALUE+vstring
1.55 paf 977: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 978: // new pieces storage
1.25 paf 979: PC->string=NEW String(POOL);
1.58 paf 980: // make current result be pending for next call, return STRING for now
981: PC->pending_state=result; result=STRING;
982: }
1.67 paf 983: if(skip_analized) {
984: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 985: }
1.58 paf 986: return result;
1.1 paf 987: }
988:
1.9 paf 989: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 990: {
1.16 paf 991: //fprintf(stderr, "[%s]\n", s);
1.6 paf 992:
1.46 paf 993: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 994: return 1;
995: }
996:
997: static void
1.9 paf 998: yyprint(
1.1 paf 999: FILE *file,
1000: int type,
1001: YYSTYPE value)
1002: {
1.9 paf 1003: if(type==STRING)
1.38 paf 1004: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 1005: }
1006:
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