I'm implementing a programming language (katir) with the help of yacc and lex. Lex and yacc files are prepared and lex.yy.c and y.tab.c files are created without any error. But when I call gcc -o katir y.tab.c it gives a big list of error such as and it continues like this:
y.tab.c:557:41: error: expected ‘;’ before ‘goto’ yyloop: ^y.tab.c:558:8: error: called object is not a function or function pointer if ((yyn = yydefred[yystate]) != 0) goto yyreduce; ^y.tab.c:559:5: error: expected ‘;’ before ‘{’ token if (yychar < 0) ^y.tab.c:607:8: error: called object is not a function or function pointer yyinrecovery: ^y.tab.c:608:5: error: expected ‘;’ before ‘{’ token if (yyerrflag < 3) ^y.tab.c:666:8: error: called object is not a function or function pointer yym = yylen[yyn]; ^y.tab.c:667:9: error: expected ‘;’ before ‘yyval’ if (yym) ^y.tab.c:669:9: error: expected ‘;’ before ‘memset’ else ^y.tab.c:677:8: error: called object is not a function or function pointer yym = yylhs[yyn]; ^y.tab.c:678:5: error: expected ‘;’ before ‘{’ token if (yystate == 0 && yym == 0) ^y.tab.c:708:9: error: expected ‘;’ before ‘yystate’ else ^y.tab.c:714:8: error: called object is not a function or function pointer #endif ^y.tab.c:715:5: error: expected ‘;’ before ‘{’ token if (yystack.s_mark >= yystack.s_last && yygrowstack(&yystack)) ^y.tab.c:727:12: error: called object is not a function or function pointer yyfreestack(&yystack); ^y.tab.c:731:12: error: called object is not a function or function pointer yyfreestack(&yystack);My lex file is;
%{#include <stdlib.h>void yyerror(char *);%}begin beginend endassignment_op <-endline \ndifference diffset_type setinteger_type integerchar_type charboolean_type booleanstring_type stringfloat_type floatconstant constequal ==|eqcomment {hashtag}([^\n])*\nhashtag #and \&\&|andor \|\||orcardinality_op \|cp_op cpset_del delelse elsenot !|notlt <|ltgt >|gtlte <=|ltegte >=|gtelp \(rp \)lcb \{rcb \}comma ,endstmnt \;underscore _dot \.digit [0-9]letter[a-zA-Z]if ifthen thendo domultiplier \*divider \/subtractor \-adder \+union uniintersection intersubset subssuperset sups while whilefor forfc fcreturn returninput inputoutput outputtrue truefalse falsespace ([ ])boolean TRUE|FALSEinteger [+-]?({digit})+float ({integer})*(\.({digit})+|({digit})+\.)({digit})*char \'[^\\\']\'string \"([^\\\"]|\\\"|\\\n|\\\\)*\"identifier {letter}({letter}|{digit}|{underscore})*text ([^\\\"]|\\\"|\\\n|\\\\)*whitespace [ \t]%option yylineno%%{end} return end;{begin} return begin;{assignment_op} return assignment_op;{equal} return equality_op;{hashtag} return hashtag;{set_type} return set_type;{and} return and;{or} return or;{else} return else;{lp} return lp;{rp} return rp;{lcb} return lb;{rcb} return rb;{lt} return lt;{gt} return gt;{lte} return lte;{gte} return gte;{comma} return comma;{dot} return dot;{then} return then;{cardinality_op} return cardinality_op;{cp_op} return cp_op;{set_del} return del;{float} return float;{digit} return digit;{integer} return integer;{integer_type} return int_type;{char_type} return char_type;{boolean_type} return boolean_type;{string_type} return string_type;{float_type} return float_type;{if} return if;{do} return do;{while} return while;{for} return for;{true} return true;{false} return false;{difference} return difference;{union} return union;{intersection} return intersection;{subset} return subset;{superset} return superset;{constant} return constant;{boolean} return boolean;{char} return char;{fc} return fc;{endline} ;{whitespace};{return} return return;{output} return output;{input} return input;{string} return string;{identifier} return identifier;{comment} return comment;{endstmnt} return endstmnt;{underscore} return underscore;{multiplier} return multiplier;{divider} return divider;{subtractor} return subtractor;{adder} return adder;{text} return text;%%int yywrap(){return 1;}And yacc file is the following;
%{#include <stdio.h>#include <stdlib.h>%}%token begin%token end%token assignment_op%token equal%token hashtag%token constant%token and%token or%token then%token not%token else%token lp%token rp%token lcb%token rcb%token comment%token lt%token gt%token lte%token gte%token comma%token dot%token cardinality_op%token cp_op%token set_del%token float%token digit%token integer%token integer_type%token char_type%token boolean_type%token string_type%token float_type%token if%token do%token while%token for%token true%token false%token difference%token union%token set_type%token intersection%token subset%token superset%token constant%token boolean%token char%token fc%token return%token output %token input%token string%token identifier%token comment%token endstmnt%token underscore%token multiplier%token divider%token subtractor%token adder%token text%start program%right assignment_op%left adder subtractor difference intersection union%left multiplier divider%left cp_op%%//Start Ruleprogram: begin stmnt_l end; stmnt_l: stmnt endstmnt |stmnt endstmnt stmnt_l ;//Possible statement typesstmnt: if_stmnt;nan_if: loop_stmnt |expression |declare |initialize |in_out_stmnt |function ;loop_stmnt: while_stmnt |for_stmnt |do_while_stmnt ;if_stmnt: matched | unmatched;matched: if logical_expression then matched else matched| nan_if;unmatched: if logical_expression then stmnt | if logical_expression then matched else unmatched;while_stmnt: while lp logical_expression rp lcb stmnt_l rcb;do_while_stmnt: do lcb stmnt_l rcb while logical_expression ;for_stmnt: for lp initialize endstmnt logical_expression lp stmnt_l rp;term: var | constant_type | function_call;constant_type: constant var;var: identifier;//Typestype: boolean | string | integer | float; //|setprimitive: boolean_type | string_type | integer_type | float_type | set_type; set: lcb list rcb | lcb rcb;list: type | var | type comma list | var comma list;//----------------------------------Declerations----------------------------------------------declare: primitive var;init_types: type | function_call | set_exp;initialize: declare assignment_op init_types | var assignment_op init_types;//Connectiveslogical_operator: subset | superset | lt | gt | and | or | not | equal;logical_expression: term logical_operator logical_expression | term logical_operator term | not_expression;not_expression: not lp logical_expression rp;del_expression: set_del var;//Arithmeticarithmetic_expression: arithmetic_expression adder arithmetic_expression | exp2;exp2: exp2 subtractor exp2 | exp3;exp3: exp3 multiplier exp3 | exp4;exp4: exp4 divider exp4 | exp5;exp5: integer | float | function_call;//Set Expressionsset_exp: exp_uni;exp_uni: exp_uni union exp_uni | exp_intersection;exp_intersection: exp_intersection intersection exp_intersection| exp_diff;exp_diff: exp_diff difference exp_diff|exp_cartesian;exp_cartesian: exp_cartesian cp_op exp_cartesian | set;expression: arithmetic_expression | logical_expression | cardinality_expression | del_expression;cardinality_expression: cardinality_op var cardinality_op | cardinality_op set cardinality_op;//Input/Outputin_out_stmnt: input_stmnt | output_stmnt;input_stmnt: input lp input_body rp;input_body: type var;output_stmnt: output lp output_body rp;output_body: var;//Functionfunction: type var lp arguments rp lcb stmnt_l return_stmnt rcb | type var lp rp lcb stmnt_l return_stmnt rcb;arguments: primitive var | primitive var comma arguments;function_call: fc lp parameters rp | fc lp rp;parameters: var | var comma parameters |type comma parameters;return_stmnt: return var;%%#include "lex.yy.c"int yyerror(char *s) { fprintf(stdout, "line %d: %s\n", yylineno,s);}int main(){ return yyparse(); if(yynerrs < 1){ printf("Parsing is successful\n"); } return 0;}And finally all the code I call in linux terminal is the following;
flex katir.lyacc katir.yaccgcc -o katir y.tab.c