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Caltech Intermediate Form

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Caltech Intermediate Form is a programming language created in 1980.

#2931on PLDB 44Years Old
Wikipedia

Caltech Intermediate Form (CIF) is a file format for describing integrated circuits. CIF provides a limited set of graphics primitives that are useful for describing the two-dimensional shapes on the different layers of a chip. The format allows hierarchical description, which makes the representation concise. Read more on Wikipedia...


Example from Wikipedia:
cifFile ::= (blank* command? semi)* endCommand blank* command ::= primCommand | defDeleteCommand | defStartCommand semi (blank* primCommand? semi)* defFinishCommand primCommand ::= polygonCommand | boxCommand | roundFlashCommand | wireCommand | layerCommand | callCommand | userExtensionCommand | commentCommand polygonCommand ::= "P" path boxCommand ::= "B" integer sep integer sep point (sep point)? roundFlashCommand ::= "R" integer sep point wireCommand ::= "W" integer sep path layerCommand ::= "L" blank* shortname defStartCommand ::= "D" blank* "S" integer (sep integer sep integer)? defFinishCommand ::= "D" blank* "F" defDeleteCommand ::= "D" blank* "D" integer callCommand ::= "C" integer transformation userExtensionCommand ::= digit userText commentCommand ::= "(" commentText ")" endCommand ::= "E" transformation ::= (blank* ("T" point |"M" blank* "X" |"M" blank* "Y" |"R" point)*)* path ::= point (sep point)* point ::= sInteger sep sInteger sInteger ::= sep* "-"? integerD integer ::= sep* integerD integerD ::= digit+ shortname ::= c c? c? c? c ::= digit | upperChar userText ::= userChar* commentText ::= commentChar* | commentText "(" commentText ")" commentText semi ::= blank* ";" blank* sep ::= upperChar | blank digit ::= "0" | "1" | ... | "9" upperChar ::= "A" | "B" | ... | "Z" blank ::= any ASCII character except digit, upperChar, "-", "(", ")", or ";" userChar ::= any ASCII character except ";" commentChar ::= any ASCII character except "(" or ")"

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