root ::= (declaration)*
declaration ::= dataType identifier "(" parameter? ")" "{" statement* "}"
dataType ::= "int" ws | "float" ws | "char" ws
identifier ::= [a-zA-Z_] [a-zA-Z_0-9]*
parameter ::= dataType identifier
statement ::=
( dataType identifier ws "=" ws expression ";" ) |
( identifier ws "=" ws expression ";" ) |
( identifier ws "(" argList? ")" ";" ) |
( "return" ws expression ";" ) |
( "while" "(" condition ")" "{" statement* "}" ) |
( "for" "(" forInit ";" ws condition ";" ws forUpdate ")" "{" statement* "}" ) |
( "if" "(" condition ")" "{" statement* "}" ("else" "{" statement* "}")? ) |
( singleLineComment ) |
( multiLineComment )
forInit ::= dataType identifier ws "=" ws expression | identifier ws "=" ws expression
forUpdate ::= identifier ws "=" ws expression
condition ::= expression relationOperator expression
relationOperator ::= ("<=" | "<" | "==" | "!=" | ">=" | ">")
expression ::= term (("+" | "-") term)*
term ::= factor(("*" | "/") factor)*
factor ::= identifier | number | unaryTerm | funcCall | parenExpression
unaryTerm ::= "-" factor
funcCall ::= identifier "(" argList? ")"
parenExpression ::= "(" ws expression ws ")"
argList ::= expression ("," ws expression)*
number ::= [0-9]+
singleLineComment ::= "//" [^\n]* "\n"
multiLineComment ::= "/*" ( [^*] | ("*" [^/]) )* "*/"
ws ::= ([ \t\n]+)