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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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