Basic-level-Bangla-Programming-Language/Final_parser.txt at main · sararahman1729/Basic-level-Bangla-Programming-Language · GitHub

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// Parser Rules
program
    : statement* EOF
    ;

statement
    : declaration
    | assignment
    | arrayDeclaration
    | arrayAssignment
    | fileOperation
    | flowControl
    ;

declaration
    : type IDENTIFIER (ASSIGN_OP expression)?
    ;

assignment
    : IDENTIFIER ASSIGN_OP expression
    ;

arrayDeclaration
    : type IDENTIFIER '[' NUMBER ']'
    ;


type
    : INTEGER
    ;

arrayAssignment
    : IDENTIFIER '[' expression ']' ASSIGN_OP expression
    ;

fileOperation
    : 'filekhola' '(' STRING ')'
    | 'filelekha' '(' STRING ',' STRING ')'
    | 'filepora' '(' STRING ')'
    ;

expression
    : IDENTIFIER
    | NUMBER
    | STRING
    | expression ARITH_OP expression
    | IDENTIFIER '[' expression ']'
    | '(' expression ')'
    ;

flowControl
    : ifElse
    | whileLoop
    | forLoop
    ;

ifElse
    : 'jodi' '(' condition ')' statements ('nahole' statements)?
    ;

whileLoop
    : 'jokhon' '(' condition ')' statements
    ;

forLoop
    : 'proti' '(' (declaration | assignment)? ';' condition? ';' assignment? ')' statements
    ;

condition
    : expression COMPARE_OP expression
    ;

statements
    : statement+
    ;