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Chris Leishman edited this page May 23, 2016 · 12 revisions
Add documentation to AST constructors

Many of the AST constructors do not currently have doxygen comments to provide documentation. Adding these is a straightforward, tedious task, and very helpful task. I.e. https://github.com/cleishm/libcypher-parser/blob/v0.1.0/src/lib/cypher-parser.h#L524-L899

Add accessor methods for AST nodes

Many of the AST nodes do not currently have functions exposed for accessing their attributes (e.g. like the CYPHER_AST_COLLECTION node does). This is also a very easy task, although a little tedious.

Pretty printing

What good is a full AST, containing all the information needed to render out (including comment nodes), if there isn't an easy way to create a pretty rendering?

Semantic checking of ASTs

To provide much more interesting linting of cypher statements, it is necessary to add a complete semantic checking feature, which would take a parsed AST and evaluate a variety of semantic rules against it, including type checking.

Add tests for parsing

There are very few automated tests covering parsing of the Cypher grammar, and adding more would be a wonderful contribution. See https://github.com/cleishm/libcypher-parser/blob/v0.1.0/tests/check_command.c as an example, although it may be helpful to assert on an AST rendering to a memstream, instead of checking each node separately.

Improvements to leg

leg is a great tool, but has many shortcomings that had to be worked around. There are many improvements that could be made to leg, which would simplify the libcypher-parser implementation and provide performance advantages. These include:

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