windjammer 0.48.0

A simple language inspired by Go, Ruby, and Elixir that transpiles to Rust - 80% of Rust's power with 20% of the complexity
Documentation 
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//! Filter dependency metadata so locally-defined types always win during inference.

use std::collections::HashSet;

/// Unqualified struct name from an associated-method registry key (`Type::method` or `mod::Type::method`).
pub fn struct_name_from_method_key(name: &str) -> Option<&str> {
    let (parent, method) = name.rsplit_once("::")?;
    if method.contains("::") {
        return None;
    }
    let struct_name = parent.rsplit("::").next().unwrap_or(parent);
    if !struct_name.chars().next().is_some_and(|c| c.is_uppercase()) {
        return None;
    }
    Some(struct_name)
}

/// True when `name` is an associated method on a struct defined in the current crate.
pub fn signature_targets_local_struct(name: &str, local_struct_names: &HashSet<String>) -> bool {
    struct_name_from_method_key(name).is_some_and(|s| local_struct_names.contains(s))
}

/// Remove dependency signatures for types the current crate defines locally.
pub fn drop_dependency_signatures_for_local_types<T>(
    signatures: &mut std::collections::HashMap<String, T>,
    local_struct_names: &HashSet<String>,
) {
    signatures.retain(|name, _| !signature_targets_local_struct(name, local_struct_names));
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn module_qualified_local_struct_is_detected() {
        let locals: HashSet<String> = ["DialogueNodeTree".to_string()].into_iter().collect();
        assert!(signature_targets_local_struct(
            "dialogue::tree::DialogueNodeTree::get_node",
            &locals
        ));
        assert!(signature_targets_local_struct(
            "DialogueNodeTree::get_node",
            &locals
        ));
        assert!(!signature_targets_local_struct(
            "dialogue_tree::DialogueTree::get_node",
            &locals
        ));
    }
}