Struct FileRegistryConfig 

pub struct FileRegistryConfig<T> {
    pub extensions: &'static [&'static str],
    pub transform: fn(&str) -> Result<T, LoadError>,
}

Configuration for a file registry.

Specifies which file extensions to recognize and how to transform file content into the target type.

Example

// For template files (identity transform)
FileRegistryConfig {
    extensions: &[".tmpl", ".jinja2", ".j2"],
    transform: |content| Ok(content.to_string()),
}

// For stylesheet files (YAML parsing)
FileRegistryConfig {
    extensions: &[".yaml", ".yml"],
    transform: |content| parse_style_definitions(content),
}

Fields

extensions: &'static [&'static str]

Valid file extensions in priority order (first = highest priority).

When multiple files exist with the same base name but different extensions, the extension appearing earlier in this list wins for extensionless lookups.

transform: fn(&str) -> Result<T, LoadError>

Transform function: file content → typed value.

Called when reading a file to convert raw string content into the target type. Return Err(LoadError::Transform { .. }) for parse failures.