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