Rust graph (Peter)

rust/Cargo.toml

@@ -8,17 +8,25 @@ name = "_rustgrimp"
 crate-type = ["cdylib", "rlib"]
 
 [dependencies]
-log = "0.4.19"
-pyo3-log = "0.12.1"
-serde_json = "1.0.103"
 rayon = "1.10"
-petgraph = "0.6.5"
 bimap = "0.6.3"
+slotmap = "1.0.7"
+getset = "0.1.3"
+derive-new = "0.7.0"
+lazy_static = "1.5.0"
+string-interner = "0.18.0"
+thiserror = "2.0.11"
+itertools = "0.14.0"
+tap = "1.0.1"
 rustc-hash = "2.1.0"
+indexmap = "2.7.1"
 
 [dependencies.pyo3]
 version = "0.23.4"
 
 [features]
 extension-module = ["pyo3/extension-module"]
 default = ["extension-module"]
+
+[dev-dependencies]
+serde_json = "1.0.137"

rust/src/errors.rs

@@ -0,0 +1,29 @@
+use crate::exceptions::{ModuleNotPresent, NoSuchContainer};
+use pyo3::exceptions::PyValueError;
+use pyo3::PyErr;
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum GrimpError {
+    #[error("Module {0} is not present in the graph.")]
+    ModuleNotPresent(String),
+
+    #[error("Container {0} does not exist.")]
+    NoSuchContainer(String),
+
+    #[error("Modules have shared descendants.")]
+    SharedDescendants,
+}
+
+pub type GrimpResult<T> = Result<T, GrimpError>;
+
+impl From<GrimpError> for PyErr {
+    fn from(value: GrimpError) -> Self {
+        // A default mapping from `GrimpError`s to python exceptions.
+        match value {
+            GrimpError::ModuleNotPresent(_) => ModuleNotPresent::new_err(value.to_string()),
+            GrimpError::NoSuchContainer(_) => NoSuchContainer::new_err(value.to_string()),
+            GrimpError::SharedDescendants => PyValueError::new_err(value.to_string()),
+        }
+    }
+}

rust/src/exceptions.rs

@@ -0,0 +1,4 @@
+use pyo3::create_exception;
+
+create_exception!(_rustgrimp, ModuleNotPresent, pyo3::exceptions::PyException);
+create_exception!(_rustgrimp, NoSuchContainer, pyo3::exceptions::PyException);