Grammar

Formal Grammar (BNF)

This is the formal grammar for the current version of Parakeet

<compound statement> ::= <statement> <eol> | <statement> <eol> <compound statement>
<statement>          ::= <expression> | <assign> | <id> | <type declaration> | <id> <arguments>
<expression>         ::= <term> | <expression> "+" <term> | <expression> "-" <term>
<term>               ::= <pow> | <term> "*" <pow> | <term> "/" <pow> | <term> "%" <pow>
<pow>                ::= <factor> | <pow> "^" <factor>
<factor>             ::= <int> | <float> | <str> | <char> | "(" <expression> ")" | <id>
<string>             ::= """ <string contents> """ | "'" <string contents> "'"
<string contents>    ::= "" | <char> <string contents>
<int>                ::= "" | <num> <int>
<float>               ::= "" | <int> "." <int>
<num>                ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
<char>               ::= -- Any Unicode Character --
<alphabetic char>    ::= -- Any Alphabetic Character --
<assign>             ::= "let" <id> <assign value> | "let" <id> "(" <arguments> ")" <assign value>
<assign value>       ::= "=" <statement> | "= {" <compound statement> "}"
<id>                 ::= <alphabetic char> <id tail>
<id tail>            ::= "" | <allowed id char> <id tail>
<allowed id char>    ::= -- Any Unicode Character excluding : --
<eol>                ::= "\n" | ";"
<type declaration>   ::= <id> ":" <id>
<arguments>          ::= <type declaration> ", " <arguments> | <type declaration>

BNF Wikipedia Page