On 24 Aug 2006, at 08:00, Erik Sandberg wrote:
I found a solution to my problem: If a function takes two
arguments, then the
lexer generates three tokens for the function name:
\function
=>
FUNCTION EXPECT_ARG EXPECT_ARG
and then the grammar for the argument list looks like:
argument_list: /*nothing*/ | EXPECT_ARG argument_list argument;
which works perfectly.
The idea of letting the lexer to insert a token has been used, for
example, in the .l grammar of Bison self.
The advantage is that it simplifies the parser (.y) grammar, but it
may result in a complicated lexer (.l) grammar. So if this becomes a
problem, a GLR grammar might be attempted.
Hans Aberg
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