/SPO_Interpreter

Primary LanguageJava

SPO_Interpreter

Support items:

  • assign
  • declare
  • functions:
    • print
    • write
    • fact //factorial
    • pow
  • structs
  • while

Grammar will load from file "grammar" in main directory.

// print info: Parser: - match() - say() - print() PostfixMaker: - print() VarTable: - print()

/* NON_TERMINALS */

lang : (expr)+ expr : declare | assign | struct_expr | while_expr | function_kw declare : VAR_KW VAR SM assign : VAR ASSIGN_OP stmt SM stmt : operand (OP stmt)* SM operand : (BRK_O operand) | (stmtUnit (BRK_C)) | functionStmt stmtUnit : DIGIT | struct_stmt | VAR functionStmt : FUNCTION BRK_O stmtUnit (BRK_C | SEP stmtUnit BRK_C) struct_stmt : VAR DOT_OP VAR struct_expr : struct_decl CBRK_O struct_body CBRK_C struct_decl : STRUCT_KW VAR struct_body : (declare | assign) while_expr : while_loop while_loop : while_decl CBRK_O while_body CBRK_C while_decl : WHILE_KW BRK_O while_limit BRK_C while_body : (expr)* while_limit : VAR OP stmtUnit function_kw : FUNCTION BRK_O stmtUnit BRK_C SM

/* TERMINALS */

VAR_KW : var FOR_KW : for WHILE_KW : while STRUCT_KW : struct FUNCTION : pow|fact|print|write DIGIT : 0|[1-9]{1}[0-9]* VAR : [a-zA-Z_]+ WS : \s* SM : ';' SEP : ',' ASSIGN_OP : '=' DOT_OP : '.' PLUS_OP : '+' MINUS_OP : '-' DEL_OP : '/' MULT_OP : '*' GRT_OP : '>' LST_OP : '<' BRK_O : '(' BRK_C : ')' CBRK_O : '{' CBRK_C : '}'