Hi,
Sorry if this is incorrect place to ask, this is my first time using a
mailing list.
I have a language that I would like to parse:
if N == 2 {
A = 100;
}
if N == 3 {
B = 123;
}
To do this I have the relevant rules:
program:
statement program
| statement
;
statement:
assignment
| conditional
| loop
| END
conditional:
IF comparison '{' END program '}' END {
std::cout << "F: " << line_num << std::endl;
F_CONDITIONAL_BLOCK -= 1;
if (F_CONDITIONAL_BLOCK > 0) {
F_CONDITIONAL_ELSE_BLOCK =
PREVIOUS_F_CONDITIONAL_ELSE_BLOCK.top();
PREVIOUS_F_CONDITIONAL_ELSE_BLOCK.pop();
} else {
F_CONDITIONAL_ELSE_BLOCK = false;
}
link_with_parent();
}
My rule to match the IF token is as follows:
if {
std::cout << "S: " << line_num + 1 << std::endl;
/* some extra, non-related code */
return IF;
};
For the above program, I get the following output:
S: 1
S: 4
F: 3
F: 6
What is weird here is that IF token on line 4 is matched *before* the
conditional rule is matched on line 3.
I know I have probably done something wrong, I have mostly come up with
this myself, but I am pulling my hair out here trying to figure the
issue out.
Tom.
