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| version 1.165.4.2, 2001/09/17 14:26:56 | version 1.186, 2002/04/18 11:41:29 |
|---|---|
| Line 1 | Line 1 |
| %{ | |
| /** @file | /** @file |
| Parser: compiler(lexical parser and grammar). | Parser: compiler(lexical parser and grammar). |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) |
| $Id$ | |
| */ | */ |
| %{ | |
| static char *RCSId="$Id$"; | |
| /** | /** |
| @todo parser4: | @todo parser4: |
| Line 59 static int yylex(YYSTYPE *lvalp, void *p | Line 59 static int yylex(YYSTYPE *lvalp, void *p |
| %token BAD_STRING_COMPARISON_OPERATOR | %token BAD_STRING_COMPARISON_OPERATOR |
| %token BAD_HEX_LITERAL | %token BAD_HEX_LITERAL |
| %token BAD_METHOD_DECL_START | |
| %token LAND "&&" | %token LAND "&&" |
| %token LOR "||" | %token LOR "||" |
| Line 99 static int yylex(YYSTYPE *lvalp, void *p | Line 100 static int yylex(YYSTYPE *lvalp, void *p |
| /* numerical */ | /* numerical */ |
| %left '-' '+' | %left '-' '+' |
| %left '*' '/' '%' | %left '*' '/' '%' '\\' |
| %left NEG /* negation: unary - */ | %left NEG /* negation: unary - */ |
| %% | %% |
| Line 238 action: get | put | call; | Line 239 action: get | put | call; |
| /* get */ | /* get */ |
| get: get_value { | get: get_value { |
| $$=$1; /* stack: resulting value */ | $$=$1; /* stack: resulting value */ |
| O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */ | changetail_or_append($$, |
| OP_GET_ELEMENT, false, /*->*/OP_GET_ELEMENT__WRITE, | |
| /*or */OP_WRITE_VALUE | |
| ); /* value=pop; wcontext.write(value) */ | |
| }; | }; |
| get_value: '$' get_name_value { $$=$2 }; | get_value: '$' get_name_value { $$=$2 }; |
| get_name_value: name_without_curly_rdive EON | name_in_curly_rdive; | get_name_value: name_without_curly_rdive EON | name_in_curly_rdive; |
| Line 251 name_without_curly_rdive_read: name_with | Line 255 name_without_curly_rdive_read: name_with |
| $$=N(POOL); | $$=N(POOL); |
| Array *diving_code=$1; | Array *diving_code=$1; |
| const String *first_name=LA2S(diving_code); | const String *first_name=LA2S(diving_code); |
| // self.xxx... -> xxx... | |
| // OP_VALUE+string+OP_GET_ELEMENT+... -> OP_WITH_SELF+... | |
| if(first_name && *first_name==SELF_ELEMENT_NAME) { | if(first_name && *first_name==SELF_ELEMENT_NAME) { |
| O($$, OP_WITH_SELF); /* stack: starting context */ | O($$, OP_WITH_SELF); /* stack: starting context */ |
| P($$, diving_code, | P($$, diving_code, |
| /* skip over... */ | /* skip over... */ |
| diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/); | diving_code->size()>=3?3/*OP_VALUE+string+OP_GET_ELEMENTx*/:2/*OP_+string*/); |
| } else { | } else { |
| O($$, OP_WITH_READ); /* stack: starting context */ | O($$, OP_WITH_READ); /* stack: starting context */ |
| // ^if ELEMENT -> ^if ELEMENT_OR_OPERATOR | |
| // OP_VALUE+string+OP_GET_ELEMENT. -> OP_VALUE+string+OP_GET_ELEMENT_OR_OPERATOR. | |
| if(PC.in_call_value && diving_code->size()==3) | |
| diving_code->put_int(2, OP_GET_ELEMENT_OR_OPERATOR); | |
| P($$, diving_code); | P($$, diving_code); |
| } | } |
| /* diving code; stack: current context */ | /* diving code; stack: current context */ |
| Line 279 name_expr_wdive_root: name_expr_dive_cod | Line 290 name_expr_wdive_root: name_expr_dive_cod |
| $$=N(POOL); | $$=N(POOL); |
| Array *diving_code=$1; | Array *diving_code=$1; |
| const String *first_name=LA2S(diving_code); | const String *first_name=LA2S(diving_code); |
| // $self.xxx... -> $xxx... | |
| // OP_VALUE+string+OP_GET_ELEMENT+... -> OP_WITH_SELF+... | |
| if(first_name && *first_name==SELF_ELEMENT_NAME) { | if(first_name && *first_name==SELF_ELEMENT_NAME) { |
| O($$, OP_WITH_SELF); /* stack: starting context */ | O($$, OP_WITH_SELF); /* stack: starting context */ |
| P($$, diving_code, | P($$, diving_code, |
| /* skip over... */ | /* skip over... */ |
| diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/); | diving_code->size()>=3?3/*OP_VALUE+string+OP_GET_ELEMENTx*/:2/*OP_+string*/); |
| } else { | } else { |
| O($$, OP_WITH_ROOT); /* stack: starting context */ | O($$, OP_WITH_ROOT); /* stack: starting context */ |
| P($$, diving_code); | P($$, diving_code); |
| Line 309 construct_square: '[' any_constructor_co | Line 322 construct_square: '[' any_constructor_co |
| } | } |
| ; | ; |
| construct_round: '(' expr_value ')' { | construct_round: '(' expr_value ')' { |
| $$=N(POOL); | |
| O($$, OP_PREPARE_TO_EXPRESSION); | |
| // stack: context, name | // stack: context, name |
| $$=$2; // stack: context, name, value | P($$, $2); // stack: context, name, value |
| O($$, OP_CONSTRUCT_EXPR); /* value=pop->as_expr_result; name=pop; context=pop; construct(context,name,value) */ | O($$, OP_CONSTRUCT_EXPR); /* value=pop->as_expr_result; name=pop; context=pop; construct(context,name,value) */ |
| } | } |
| ; | ; |
| construct_curly: '{' maybe_codes '}' { | construct_curly: '{' maybe_codes '}' { |
| // stack: context, name | // stack: context, name |
| $$=N(POOL); | $$=N(POOL); |
| CCA($$, $2); /* code=pop; name=pop; context=pop; construct(context,name,junction(code)) */ | OA($$, OP_CURLY_CODE__CONSTRUCT, $2); /* code=pop; name=pop; context=pop; construct(context,name,junction(code)) */ |
| }; | }; |
| any_constructor_code_value: | any_constructor_code_value: |
| Line 327 any_constructor_code_value: | Line 342 any_constructor_code_value: |
| ; | ; |
| constructor_code_value: constructor_code { | constructor_code_value: constructor_code { |
| $$=N(POOL); | $$=N(POOL); |
| O($$, OP_CREATE_EWPOOL); /* stack: empty write context */ | OA($$, OP_OBJECT_POOL, $1); /* stack: empty write context */ |
| P($$, $1); /* some code that writes to that context */ | /* some code that writes to that context */ |
| O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */ | /* context=pop; stack: context.value() */ |
| }; | }; |
| constructor_code: codes__excluding_sole_str_literal; | constructor_code: codes__excluding_sole_str_literal; |
| codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) }; | codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) }; |
| Line 338 codes__excluding_sole_str_literal: actio | Line 353 codes__excluding_sole_str_literal: actio |
| call: call_value { | call: call_value { |
| $$=$1; /* stack: value */ | $$=$1; /* stack: value */ |
| O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */ | changetail_or_append($$, |
| OP_CALL, true, /*->*/ OP_CALL__WRITE, | |
| /*or */OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */ | |
| }; | }; |
| call_value: '^' { PC.object_constructor_allowed=true } | call_value: '^' { |
| call_name { PC.object_constructor_allowed=false } | PC.in_call_value=true; |
| } | |
| call_name { | |
| PC.in_call_value=false; | |
| } | |
| store_params EON { /* ^field.$method{vasya} */ | store_params EON { /* ^field.$method{vasya} */ |
| $$=$3; /* with_xxx,diving code; stack: context,method_junction */ | $$=$3; /* with_xxx,diving code; stack: context,method_junction */ |
| O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */ | |
| YYSTYPE params_code=$5; | YYSTYPE params_code=$5; |
| if(params_code->size()==3) // probably [] case. [OP_VALUE + Void + STORE_PARAM] | if(params_code->size()==3) { // probably [] case. [OP_VALUE + Void + STORE_PARAM] |
| if(Value *value=LA2V(params_code)) // it is OP_VALUE + value? | if(Value *value=LA2V(params_code)) // it is OP_VALUE + value? |
| if(!value->is_defined()) // value is VVoid? | if(!value->is_defined()) // value is VVoid? |
| params_code=0; // ^zzz[] case. don't append lone empty param. | params_code=0; // ^zzz[] case. don't append lone empty param. |
| if(params_code) | } |
| P($$, params_code); // filling method_frame.store_params | /* stack: context, method_junction */ |
| O($$, OP_CALL); // method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value | OA($$, OP_CALL, params_code); // method_frame=make frame(pop junction); ncontext=pop; call(ncontext,method_frame) stack: value |
| }; | }; |
| call_name: name_without_curly_rdive; | call_name: name_without_curly_rdive; |
| Line 385 store_code_param_part: code_param_value | Line 405 store_code_param_part: code_param_value |
| }; | }; |
| store_expr_param_part: write_expr_value { | store_expr_param_part: write_expr_value { |
| $$=N(POOL); | $$=N(POOL); |
| PEA($$, $1); | OA($$, OP_EXPR_CODE__STORE_PARAM, $1); |
| }; | }; |
| store_curly_param_part: maybe_codes { | store_curly_param_part: maybe_codes { |
| $$=N(POOL); | $$=N(POOL); |
| PCA($$, $1); | OA($$, OP_CURLY_CODE__STORE_PARAM, $1); |
| }; | }; |
| code_param_value: | code_param_value: |
| void_value /* optimized [;...] case */ | void_value /* optimized [;...] case */ |
| Line 397 code_param_value: | Line 417 code_param_value: |
| | constructor_code_value /* [something complex] */ | | constructor_code_value /* [something complex] */ |
| ; | ; |
| write_expr_value: expr_value { | write_expr_value: expr_value { |
| $$=$1; | $$=N(POOL); |
| O($$, OP_PREPARE_TO_EXPRESSION); | |
| P($$, $1); | |
| O($$, OP_WRITE_EXPR_RESULT); | O($$, OP_WRITE_EXPR_RESULT); |
| }; | }; |
| Line 408 name_expr_dive_code: name_expr_value | n | Line 430 name_expr_dive_code: name_expr_value | n |
| name_path: name_step | name_path name_step { $$=$1; P($$, $2) }; | name_path: name_step | name_path name_step { $$=$1; P($$, $2) }; |
| name_step: name_advance1 '.'; | name_step: name_advance1 '.'; |
| name_advance1: name_expr_value { | name_advance1: name_expr_value { |
| // we know that name_advance1 not called from ^xxx context | |
| // so we'll not check for operator call possibility as we do in name_advance2 | |
| /* stack: context */ | /* stack: context */ |
| $$=$1; /* stack: context,name */ | $$=$1; /* stack: context,name */ |
| O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */ | O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */ |
| Line 430 name_expr_subvar_value: '$' subvar_ref_n | Line 455 name_expr_subvar_value: '$' subvar_ref_n |
| O($$, OP_GET_ELEMENT); | O($$, OP_GET_ELEMENT); |
| }; | }; |
| name_expr_with_subvar_value: STRING subvar_get_writes { | name_expr_with_subvar_value: STRING subvar_get_writes { |
| Array *code; | |
| { | |
| change_string_literal_to_write_string_literal(code=$1); | |
| P(code, $2); | |
| } | |
| $$=N(POOL); | $$=N(POOL); |
| O($$, OP_CREATE_EWPOOL); | OA($$, OP_STRING_POOL, code); |
| P($$, $1); | |
| O($$, OP_WRITE_VALUE); | |
| P($$, $2); | |
| O($$, OP_REDUCE_EWPOOL); | |
| }; | }; |
| name_square_code_value: '[' codes ']' { | name_square_code_value: '[' codes ']' { |
| $$=N(POOL); | $$=N(POOL); |
| O($$, OP_CREATE_EWPOOL); | OA($$, OP_OBJECT_POOL, $2); /* stack: empty write context */ |
| P($$, $2); | /* some code that writes to that context */ |
| O($$, OP_REDUCE_EWPOOL); | /* context=pop; stack: context.value() */ |
| }; | }; |
| subvar_ref_name_rdive: STRING { | subvar_ref_name_rdive: STRING { |
| $$=N(POOL); | $$=N(POOL); |
| Line 464 class_static_prefix: STRING ':' { | Line 490 class_static_prefix: STRING ':' { |
| }; | }; |
| class_constructor_prefix: class_static_prefix ':' { | class_constructor_prefix: class_static_prefix ':' { |
| $$=$1; | $$=$1; |
| if(!PC.object_constructor_allowed) { | if(!PC.in_call_value) { |
| strcpy(PC.error, ":: not allowed here"); | strcpy(PC.error, ":: not allowed here"); |
| YYERROR; | YYERROR; |
| } | } |
| Line 475 class_constructor_prefix: class_static_p | Line 501 class_constructor_prefix: class_static_p |
| /* expr */ | /* expr */ |
| expr_value: expr { | expr_value: expr { |
| // see OP_PREPARE_TO_EXPRESSION!! | |
| if(($$=$1)->size()==2) // only one string literal in there? | if(($$=$1)->size()==2) // only one string literal in there? |
| change_string_literal_to_double_literal($$); // make that string literal Double | change_string_literal_to_double_literal($$); // make that string literal Double |
| }; | }; |
| Line 500 expr: | Line 527 expr: |
| | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) } | | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) } |
| | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) } | | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) } |
| | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) } | | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) } |
| | expr '\\' expr { $$=$1; P($$, $3); O($$, OP_INTDIV) } | |
| | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) } | | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) } |
| | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) } | | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) } |
| | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) } | | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) } |
| | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) } | | expr "&&" expr { $$=$1; OA($$, OP_NESTED_CODE, $3); O($$, OP_LOG_AND) } |
| | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) } | | expr "||" expr { $$=$1; OA($$, OP_NESTED_CODE, $3); O($$, OP_LOG_OR) } |
| | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) } | | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) } |
| | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) } | | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) } |
| | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) } | | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) } |
| Line 523 expr: | Line 551 expr: |
| string_inside_quotes_value: maybe_codes { | string_inside_quotes_value: maybe_codes { |
| $$=N(POOL); | $$=N(POOL); |
| O($$, OP_CREATE_SWPOOL); /* stack: empty write context */ | OA($$, OP_STRING_POOL, $1); /* stack: empty write context */ |
| P($$, $1); /* some code that writes to that context */ | /* some code that writes to that context */ |
| O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */ | /* context=pop; stack: context.get_string() */ |
| }; | }; |
| /* basics */ | /* basics */ |
| Line 558 empty: /* empty */ { $$=N(POOL) }; | Line 586 empty: /* empty */ { $$=N(POOL) }; |
| */ | */ |
| static int yylex(YYSTYPE *lvalp, void *pc) { | static int yylex(YYSTYPE *lvalp, void *pc) { |
| #define lexical_brackets_nestage PC.brackets_nestages[PC.sp] | #define lexical_brackets_nestage PC.brackets_nestages[PC.ls_sp] |
| #define RC {result=c; goto break2; } | #define RC {result=c; goto break2; } |
| register int c; | register int c; |
| Line 584 static int yylex(YYSTYPE *lvalp, void *p | Line 612 static int yylex(YYSTYPE *lvalp, void *p |
| } else | } else |
| PC.col++; | PC.col++; |
| if(c=='^' && PC.ls!=LS_COMMENT && PC.ls!=LS_DEF_COMMENT) | if(c=='@' && PC.col==0+1) { |
| if(PC.ls==LS_DEF_SPECIAL_BODY) { | |
| // @SPECIAL | |
| // ... | |
| // @<here = | |
| pop_LS(PC); // exiting from LS_DEF_SPECIAL_BODY state | |
| } // continuing checks | |
| if(PC.ls==LS_USER) { | |
| push_LS(PC, LS_DEF_NAME); | |
| RC; | |
| } else // @ in first column inside some code [when could that be?] | |
| result=BAD_METHOD_DECL_START; | |
| goto break2; | |
| } else if(c=='^') | |
| switch(PC.ls) { | |
| case LS_EXPRESSION_VAR_NAME_WITH_COLON: | |
| case LS_EXPRESSION_VAR_NAME_WITHOUT_COLON: | |
| case LS_VAR_NAME_SIMPLE_WITH_COLON: | |
| case LS_VAR_NAME_SIMPLE_WITHOUT_COLON: | |
| case LS_VAR_NAME_CURLY: | |
| case LS_METHOD_NAME: | |
| case LS_COMMENT: | |
| case LS_DEF_COMMENT: | |
| // no literals in names, please | |
| break; | |
| default: | |
| switch(*PC.source) { | switch(*PC.source) { |
| // ^escaping some punctuators | // ^escaping some punctuators |
| case '^': case '$': case ';': | case '^': case '$': case ';': |
| case '(': case ')': | case '(': case ')': |
| case '[': case ']': | case '[': case ']': |
| case '{': case '}': | case '{': case '}': |
| case '"': | case '"': case ':': |
| if(end!=begin) { | if(end!=begin) { |
| // append piece till ^ | // append piece till ^ |
| PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line); | PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line); |
| Line 639 static int yylex(YYSTYPE *lvalp, void *p | Line 692 static int yylex(YYSTYPE *lvalp, void *p |
| } | } |
| break; | break; |
| } | } |
| break; | |
| } | |
| // #comment start skipping | // #comment start skipping |
| if(c=='#' && PC.col==1) { | if(c=='#' && PC.col==1) { |
| if(end!=begin) { | if(end!=begin) { |
| Line 647 static int yylex(YYSTYPE *lvalp, void *p | Line 702 static int yylex(YYSTYPE *lvalp, void *p |
| } | } |
| // fall into COMMENT lexical state [wait for \n] | // fall into COMMENT lexical state [wait for \n] |
| push_LS(PC, LS_COMMENT); | push_LS(PC, LS_COMMENT); |
| continue; | |
| } | } |
| switch(PC.ls) { | switch(PC.ls) { |
| Line 669 static int yylex(YYSTYPE *lvalp, void *p | Line 725 static int yylex(YYSTYPE *lvalp, void *p |
| case '^': | case '^': |
| push_LS(PC, LS_METHOD_NAME); | push_LS(PC, LS_METHOD_NAME); |
| RC; | RC; |
| case '@': | |
| if(PC.col==0+1) { | |
| push_LS(PC, LS_DEF_NAME); | |
| RC; | |
| } | |
| break; | |
| case ']': | case ']': |
| if(PC.ls==LS_NAME_SQUARE_PART) | if(PC.ls==LS_NAME_SQUARE_PART) |
| if(--lexical_brackets_nestage==0) {// $name.[co<]?>de<]?> | if(--lexical_brackets_nestage==0) {// $name.[co<]?>de<]?> |
| Line 770 static int yylex(YYSTYPE *lvalp, void *p | Line 820 static int yylex(YYSTYPE *lvalp, void *p |
| break; | break; |
| case LS_DEF_SPECIAL_BODY: | case LS_DEF_SPECIAL_BODY: |
| // @todo in case | if(c=='\n') |
| // ################ | |
| // @next-method | |
| // we are here with c=='@' | |
| // which is wrong, and need action | |
| if(c=='\n') { | |
| switch(*PC.source) { | |
| case '@': case 0: // end of special_code | |
| pop_LS(PC); | |
| break; | |
| } | |
| RC; | RC; |
| } | |
| break; | break; |
| // (EXPRESSION) | // (EXPRESSION) |
| Line 820 static int yylex(YYSTYPE *lvalp, void *p | Line 859 static int yylex(YYSTYPE *lvalp, void *p |
| goto break2; | goto break2; |
| } | } |
| goto break2; | goto break2; |
| case '+': case '*': case '/': case '%': | case '+': case '*': case '/': case '%': case '\\': |
| case '~': | case '~': |
| case ';': | case ';': |
| RC; | RC; |
| Line 914 static int yylex(YYSTYPE *lvalp, void *p | Line 953 static int yylex(YYSTYPE *lvalp, void *p |
| if( | if( |
| PC.ls==LS_EXPRESSION_VAR_NAME_WITH_COLON || | PC.ls==LS_EXPRESSION_VAR_NAME_WITH_COLON || |
| PC.ls==LS_EXPRESSION_VAR_NAME_WITHOUT_COLON) { | PC.ls==LS_EXPRESSION_VAR_NAME_WITHOUT_COLON) { |
| // name in expr ends also before binary operators | // name in expr ends also before |
| switch(c) { | switch(c) { |
| // expression minus | |
| case '-': | case '-': |
| // expression integer division | |
| case '\\': | |
| pop_LS(PC); | pop_LS(PC); |
| PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; } | PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; } |
| result=EON; | result=EON; |
| Line 1080 static int yylex(YYSTYPE *lvalp, void *p | Line 1122 static int yylex(YYSTYPE *lvalp, void *p |
| case '.': // name part delim | case '.': // name part delim |
| case '$': // name part subvar | case '$': // name part subvar |
| case ':': // ':name' or 'class:name' | case ':': // ':name' or 'class:name' |
| case '^': // ^abc^xxx wrong. bailing out | |
| case ']': case '}': case ')': // ^abc]}) wrong. bailing out | |
| RC; | RC; |
| } | } |
| break; | break; |