Parser question - tilda binary operator

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Feb 26, 2015, 2:30:34 PM2/26/15

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The tilda (~) binary operator is special cased in julia_parser.scm (line 552) to :(@~ <lhs> <rhs>) what is the special case used for ?

There is no macro defined for ~ so this just reports "@~ not defined"

Is this something which should be removed from the parser?

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Feb 26, 2015, 2:59:28 PM2/26/15

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This is used in various stats packages to construct formula objects a la R:

It's not defined by default because Base doesn't provide any meaning for it.

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Feb 26, 2015, 4:20:41 PM2/26/15

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Out of interest why is that a macro and not a standard operator ?

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Feb 26, 2015, 4:53:12 PM2/26/15

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To make formulas work, you need access to the AST, not just two values, so it has to be.

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Feb 26, 2015, 5:08:32 PM2/26/15

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