asttypes.txt

Solidity ASTs:
*. each node has nodeType
*. each node, and some "pseudo-nodes", have src
*. each node has id, which is unique per-compilation
*. top level: SourceUnit
*. expression and variable nodes don't list their datatype

Yul ASTs:
*. each node has nodeType, starting with "Yul"
*. each node has src
*. there are no IDs
*. top level: YulBlock, but maybe sometimes other Yul things?
*. there are no datatypes (currently)

Vyper ASTs, as of 0.1.0-beta.17:
*. each node has ast_type
*. sourced nodes have src
*. each node has node_id, which is unique per *source*
*. top level: Module
*. variable nodes list their datatypes (obliquely), but expression nodes don't
*. uses "id" not as a node ID, but rather for names of things!

Vyper ASTs, prior to 0.1.0-beta.17:
*. like above, except there's NO ROOT NODE.  Instead the root node is just an
	array!! @_@

Solidity legacy ASTs, 0.4.0 forward:
*. each node has *name* as the nodeType (!)
*. each node has src
*. each node has id which is unique per compilation
*. top level: SourceUnit

Solidity legacy ASTs, 0.3.6:
*. each node has *name* as the node type (!)
*. each node has src
*. each node has id which is unique per compilation
*. top level: root (!)

Solidity legacy ASTs, prior to 0.3.6:
*. each node has *name* as the node type (!)
*. there are no source ranges
*. there are no IDs
*. top level: root