nac3/nac3embedded/src/lib.rs

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use std::collections::HashMap;
use std::collections::hash_map::Entry;
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use pyo3::prelude::*;
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use pyo3::exceptions;
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use rustpython_parser::{ast, parser};
fn runs_on_core(decorator_list: &[ast::Expression]) -> bool {
for decorator in decorator_list.iter() {
if let ast::ExpressionType::Identifier { name } = &decorator.node {
if name == "kernel" || name == "portable" {
return true
}
}
}
false
}
#[pyclass(name=NAC3)]
struct Nac3 {
type_definitions: HashMap<i64, ast::Program>,
host_objects: HashMap<i64, i64>,
}
#[pymethods]
impl Nac3 {
#[new]
fn new() -> Self {
Nac3 {
type_definitions: HashMap::new(),
host_objects: HashMap::new(),
}
}
fn register_host_object(&mut self, obj: PyObject) -> PyResult<()> {
Python::with_gil(|py| -> PyResult<()> {
let obj: &PyAny = obj.extract(py)?;
let obj_type = obj.get_type();
let builtins = PyModule::import(py, "builtins")?;
let type_id = builtins.call1("id", (obj_type, ))?.extract()?;
let entry = self.type_definitions.entry(type_id);
if let Entry::Vacant(entry) = entry {
let source = PyModule::import(py, "inspect")?.call1("getsource", (obj_type, ))?;
let ast = parser::parse_program(source.extract()?).map_err(|e|
exceptions::PySyntaxError::new_err(format!("failed to parse host object source: {}", e)))?;
entry.insert(ast);
// TODO: examine AST and recursively register dependencies
};
let obj_id = builtins.call1("id", (obj, ))?.extract()?;
match self.host_objects.entry(obj_id) {
Entry::Vacant(entry) => entry.insert(type_id),
Entry::Occupied(_) => return Err(
exceptions::PyValueError::new_err("host object registered twice")),
};
// TODO: collect other information about host object, e.g. value of fields
Ok(())
})
}
fn compile_method(&self, obj: PyObject, name: String) -> PyResult<()> {
Python::with_gil(|py| -> PyResult<()> {
let obj: &PyAny = obj.extract(py)?;
let builtins = PyModule::import(py, "builtins")?;
let obj_id = builtins.call1("id", (obj, ))?.extract()?;
let type_id = self.host_objects.get(&obj_id).ok_or_else(||
exceptions::PyKeyError::new_err("type of host object not found"))?;
let ast = self.type_definitions.get(&type_id).ok_or_else(||
exceptions::PyKeyError::new_err("type definition not found"))?;
if let ast::StatementType::ClassDef {
name: _,
body,
bases: _,
keywords: _,
decorator_list: _ } = &ast.statements[0].node {
for statement in body.iter() {
if let ast::StatementType::FunctionDef {
is_async: _,
name: funcdef_name,
args: _,
body: _,
decorator_list,
returns: _ } = &statement.node {
if runs_on_core(decorator_list) && funcdef_name == &name {
println!("found: {:?}", &statement.node);
}
}
}
} else {
return Err(exceptions::PyValueError::new_err("expected ClassDef for type definition"));
}
Ok(())
})
}
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}
#[pymodule]
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fn nac3embedded(_py: Python, m: &PyModule) -> PyResult<()> {
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m.add_class::<Nac3>()?;
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Ok(())
}