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Since it is possible to look a future token without consuming it, it was
possible to split the block parser into small chunks of code.
There is the performance drawback, because now the parser makes multiple
lookups to the same token. However IMO that it is not a big concern
given the small computation required to get a token. Also it can be
easily addressed by computing all token in advance.
Memory Leak:
During the refactor I found some extra memory leaks related to not
released scopes. So then, more than just printing a message I introduced
an assert on scope.c to make sure developers will get this feedback asap
because our testing framework suppress messages from stderr when the
test passes.
Signed-off-by: Carlos Maniero <carlos@maniero.me>
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We are parsing variables/functions and checking if they are defined on
scope. Otherwise we fail the parsing with a nice message.
Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
Co-authored-by: Carlos Maniero <carlosmaniero@gmail.com>
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After run `make CC=clang` we found the following problems:
error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
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Before accepting an identifier, the parser should check if that
identifier will be available. With this implementation it will be
possible. Take the following code example:
main(): i32 {
return my_exit_code;
}
The parser must return an error informing that *my_exit_code* is not
defined in the example above. The ast scope is a support module for
parser and ast, simplifying identifier resolution.
Once a curly bracket ({) is open the *scope_enter()* is called and when
it is closed (}) we pop the entire stack with *scope_leave()*.
Signed-off-by: Carlos Maniero <carlosmaniero@gmail.com>
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