operator       = @{ "operator" } // TODO
operand        = @{ "operand" }  // TODO

variable       =@{ ASCII_ALPHA
                 ~ (ASCII_ALPHANUMERIC | " ")*
                 }

decNum         =_{ ASCII_DIGIT+ }
hexNum         =_{ "0x" ~ ASCII_HEX_DIGIT+ }
num            = { hexNum | decNum }

var            =@{ "var"    ~ spacing+ ~ variable }
delvar         =@{ "delvar" ~ spacing+ ~ variable }

point          =@{ "point"  ~ spacing+ ~ variable }
pointm         =@{ "pointm" ~ spacing+ ~ variable }

add            =@{ "add"    ~ spacing+ ~ num }
addb           =@{ "addb"   ~ spacing+ ~ num }
addv           =@{ "addv"   ~ spacing+ ~ variable }

sub            =@{ "sub"    ~ spacing+ ~ num }
subb           =@{ "subb"   ~ spacing+ ~ num }
subv           =@{ "subv"   ~ spacing+ ~ variable }

copy           =@{ "copy"   ~ spacing+ ~ variable }

instruction    =_{ var
                 | delvar

                 | point
                 | pointm

                 | add
                 | addb
                 | addv

                 | sub
                 | subb
                 | subv

                 | copy

                 | operator ~ (spacing+ ~ operand)?
                 }

loopBlockStart = { "[" ~ NEWLINE }
loopBlockEnd   = { "]" }
loopBlock      = { loopBlockStart
                 ~ statements
                 ~ loopBlockEnd
                 }

statement      = _{ spacing*
                  ~ (instruction | loopBlock)
                  }

statements     = _{ (statement | NEWLINE)* }

spacing        = _{ " "  | "\t" }
COMMENT        = _{ ";;" ~ (!NEWLINE ~ ANY)* ~ NEWLINE}

file = {SOI ~ (statement ~ NEWLINE+)* ~ EOI}