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This is a very limited parser implementation which parses a single
function with return type i32 and body containing a return number statement.
The parser doesn't show the 'filepath:row:col' when it fails, a future
improvement would be display it to easy find where the compilation
problem is located.
The ast_nodes are taking the token.value ownership (which is a really
bad design since not all token.value ownership has been taken causing
memory leaking) but we never free them. For a future fix we could use a
string_view instead since we never change the original source code. The
string_view will also improve the performance a lot avoiding unnecessary
heap memory allocation.
Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
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