We don't actually need the range for layout nodes, so just store it
for token nodes. This will also make deferred node handling easier
later on, because we don't need to keep track of layout node ranges.
Previously, the passed in source file was implicitly terminated by the
first null character. The source file might, however, contain a null
character in the middle and we shouldn't stop parsing at it.
To ensure SwiftSyntax calls a compatible parser library, this patch sets
up a C API that returns a constant string calculated during compilation time to indicate
the version of syntax node declarations. The same hash will be calculated
in the SwiftSyntax (client) side as well by using the same algorithm.
During runtime, SwiftSyntax will verify its hash value is identical to the
result of calling swiftparse_node_declaration_hash before actual
parsing happens.
This patch only sets the API up. The actual implementation of the
hashing algorithm will come later.
Add a shared library with a C API that provides access to the syntactic parser with callbacks for the inference of raw syntax nodes.
This is primarily intended to be used by SwiftSyntax to speed-up source code parsing for it.
