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d5d1eb717d
This adds `cppgen`, creating structured C++ classes mirroring QL classes out of `schema.yml`. An example of generated code at the time of this commit can be found [in this gist][1]. [1]: https://gist.github.com/redsun82/57304ddb487a8aa40eaa0caa695048fa Closes https://github.com/github/codeql-c-team/issues/863
68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
import functools
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import inflection
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from typing import Dict
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from toposort import toposort_flatten
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from swift.codegen.lib import cpp, generator, schema
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def _get_type(t: str) -> str:
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if t == "string":
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return "std::string"
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if t == "boolean":
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return "bool"
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if t[0].isupper():
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return f"TrapLabel<{t}Tag>"
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return t
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def _get_field(cls: schema.Class, p: schema.Property) -> cpp.Field:
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trap_name = None
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if not p.is_single:
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trap_name = inflection.pluralize(inflection.camelize(f"{cls.name}_{p.name}")) + "Trap"
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args = dict(
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name=p.name + ("_" if p.name in cpp.cpp_keywords else ""),
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type=_get_type(p.type),
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is_optional=p.is_optional,
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is_repeated=p.is_repeated,
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trap_name=trap_name,
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)
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args.update(cpp.get_field_override(p.name))
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return cpp.Field(**args)
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class Processor:
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def __init__(self, data: Dict[str, schema.Class]):
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self._classmap = data
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@functools.cache
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def _get_class(self, name: str) -> cpp.Class:
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cls = self._classmap[name]
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trap_name = None
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if not cls.derived or any(p.is_single for p in cls.properties):
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trap_name = inflection.pluralize(cls.name) + "Trap"
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return cpp.Class(
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name=name,
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bases=[self._get_class(b) for b in cls.bases],
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fields=[_get_field(cls, p) for p in cls.properties],
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final=not cls.derived,
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trap_name=trap_name,
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)
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def get_classes(self):
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inheritance_graph = {k: cls.bases for k, cls in self._classmap.items()}
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return [self._get_class(cls) for cls in toposort_flatten(inheritance_graph)]
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def generate(opts, renderer):
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processor = Processor({cls.name: cls for cls in schema.load(opts.schema).classes})
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out = opts.cpp_output
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renderer.render(cpp.ClassList(processor.get_classes()), out / "TrapClasses.h")
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tags = ("cpp", "schema")
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if __name__ == "__main__":
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generator.run()
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