Nodes and their locations: Implicit nodes

[konradweiss]

A node in the CPG graph gets the location of a rawNode handed over by some parser. However, not all nodes we create have a rawNode in the representation of the original parser AST, e.g., Block or KeyValueExpression in Python. Currently, we can hand over a different rawNodee.g., the parent or omit it entirely, . The first results in having the code and location of the different nodes, and the second results in no location or code bring set in the final CPG node.

Problem: This can result in confusing representations, e.g., a block also has code and location spanning the function header.

Proposed Solution:

• When a rawNode is specified, either as a regular AST parser node for the CPG Node or replacement: Nothing changes
• New default behavior: When no rawNode is specified and the CPG Node has AST Children, the location and code are extracted from the AST children, spanning the code and location of the children.