147 lines
3.9 KiB
Plaintext
147 lines
3.9 KiB
Plaintext
%{
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#define YYDEBUG 1
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#include <stdio.h>
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extern int yylineno;
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void yyerror(const char*);
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int yylex();
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%}
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%debug
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%define parse.error detailed
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%token TOKEN_EOF
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%token TOKEN_IDENTIFICATION
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%token TOKEN_KEYWORD_DIVISION
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%token TOKEN_KEYWORD_DATA
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%token TOKEN_KEYWORD_SECTION
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%token TOKEN_PROGRAM_ID
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%token TOKEN_WORKING_STORAGE
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%token TOKEN_PROCEDURE
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%token TOKEN_STOP
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%token TOKEN_RUN
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%token TOKEN_MOVE
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%token TOKEN_KEYWORD_TO
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%token TOKEN_PERFORM
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%token TOKEN_VARYING
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%token TOKEN_KEYWORD_FROM
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%token TOKEN_KEYWORD_BY
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%token TOKEN_UNTIL
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%token TOKEN_END_PERFORM
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%token TOKEN_IF
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%token TOKEN_ELSE
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%token TOKEN_ELSE_IF
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%token TOKEN_END_IF
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%token TOKEN_SPACE
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%token TOKEN_KEYWORD_OCCURS
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%token TOKEN_KEYWORD_VALUE
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%token TOKEN_KEYWORD_COMPUTE
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%token TOKEN_KEYWORD_FUNCTION
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%token TOKEN_IDENT
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%token TOKEN_STRING
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%token TOKEN_INTEGER
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%token TOKEN_PICTURE
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%token TOKEN_ALPHANUMERIC
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%token TOKEN_NUMERIC
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%token TOKEN_SIGNED_NUMERIC
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%token TOKEN_IMPLIED_DECIMAL
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%token TOKEN_COMPUTATION_LEVEL_0
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%token TOKEN_COMPUTATION_LEVEL_1
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%token TOKEN_COMPUTATION_LEVEL_2
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%token TOKEN_COMPUTATION_LEVEL_3
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%token TOKEN_LEFT_PARENTHESIS
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%token TOKEN_RIGHT_PARENTHESIS
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%token TOKEN_DOT
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%token TOKEN_COMMENT
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%token TOKEN_ADD
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%token TOKEN_SUB
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%token TOKEN_MULTIPLY
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%token TOKEN_DIVIDE
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%token TOKEN_EQUAL
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%token TOKEN_GREATER_THAN
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%token TOKEN_LESS_THAN
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%token TOKEN_EXPONENTIAL
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%token TOKEN_DISPLAY
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%%
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file : statements
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statements : statements statement
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| statement
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;
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statement : section
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| sect_data
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| simple_stmt
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| data_space
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| data_declaration
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;
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section : type TOKEN_KEYWORD_DIVISION TOKEN_DOT
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| type TOKEN_RUN TOKEN_DOT
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;
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sect_data : TOKEN_PROGRAM_ID TOKEN_DOT TOKEN_IDENT TOKEN_DOT
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;
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type : TOKEN_IDENTIFICATION
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| TOKEN_PROCEDURE
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| TOKEN_STOP
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| TOKEN_KEYWORD_DATA
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;
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simple_stmt : function
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| TOKEN_KEYWORD_FUNCTION cbl_function
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;
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cbl_function : TOKEN_KEYWORD_COMPUTE parms
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;
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function : TOKEN_DISPLAY parms
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| function simple_stmt
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| if_branch
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;
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parms : TOKEN_STRING
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;
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if_branch : if_branch parms if_branch
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| TOKEN_IF
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| TOKEN_ELSE_IF
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| TOKEN_ELSE
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| TOKEN_END_IF
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;
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data_space : TOKEN_WORKING_STORAGE
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| TOKEN_KEYWORD_SECTION
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| TOKEN_DOT
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;
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data_category : TOKEN_ALPHANUMERIC
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| TOKEN_NUMERIC
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| TOKEN_SIGNED_NUMERIC
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| TOKEN_IMPLIED_DECIMAL
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;
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categry_contain : TOKEN_LEFT_PARENTHESIS TOKEN_INTEGER TOKEN_RIGHT_PARENTHESIS
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;
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complete_category: complete_category complete_category
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| data_category categry_contain
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;
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data_clause : TOKEN_COMPUTATION_LEVEL_0
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| TOKEN_COMPUTATION_LEVEL_1
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| TOKEN_COMPUTATION_LEVEL_2
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| TOKEN_COMPUTATION_LEVEL_3
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| TOKEN_KEYWORD_VALUE
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| TOKEN_KEYWORD_OCCURS
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;
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full_data_clause: data_clause data_clause
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| data_clause
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;
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data_declaration: simple_decl
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| full_decl
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;
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simple_decl : TOKEN_INTEGER TOKEN_IDENT TOKEN_DOT
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;
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full_decl : TOKEN_INTEGER TOKEN_IDENT TOKEN_PICTURE complete_category TOKEN_DOT
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| TOKEN_INTEGER TOKEN_IDENT TOKEN_PICTURE complete_category full_data_clause TOKEN_DOT
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| TOKEN_INTEGER TOKEN_IDENT TOKEN_PICTURE complete_category full_data_clause TOKEN_INTEGER TOKEN_DOT
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;
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%%
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void yyerror(const char* msg) {
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fprintf(stderr, "Error | Line: %d\n%s\n",yylineno,msg);
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}
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