[erlang-questions] Are newlines significant in Erlang grammar?
Tue Dec 20 17:45:44 CET 2011
I have been playing around with making a lexer/parser for Erlang using
boost::spirit and using the YRL from lib\stdlib-1.17.5\src\erl_parse.yrl as
my grammar. It isn't specifically called out there (or anywhere else I can
find), but I assume that newlines are significant and implied as input
For instance the following is accepted by the compiler (ignore the
meaninglessness/infinite recursion of blah)
However, if I put it all on one line, like so:
it is not accepted. It seems to be because .foo.blah is being parsed as a
single instance of expr_900, which is defined as
expr_900 -> '.' atom
expr_900 -> expr_900 '.' atom
expr_900 -> expr_max
I am fine treating newlines as input terminators but it isn't clear which
non-terminals require the presence of a newline and which don't.
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