Struct NoLoader 

pub struct NoLoader;

A loader that resolves nothing, and says so.

The default for run, so a program using use in a context with no packaging configured gets a typed error naming the package — not a silently-undefined function that fails much later as an unbound symbol pointing at innocent code.

Trait Implementations

impl Loader for NoLoader

fn load(&self, name: &str) -> Result<Vec<(String, String)>, String>

The .b sources of name, as (label, source) pairs.

fn entry_package(&self, _path: &Path) -> Option<String>

The bidama an ENTRY file at path belongs to, if it belongs to one: the package(name, …) of the Bluefile beside it. blue test bidamas/retsu/retsu.b checks and runs retsu’s own definitions, under retsu’s namespace, exactly as an importer sees them.

fn needs( &self, _package: &str, _entry_dir: Option<&Path>, ) -> Option<BTreeSet<String>>

The bidamas package’s Bluefile.lock records as needs (with no lock, its Bluefile’s rows), when the loader can read it. None when it cannot, and the check stage then has nothing to compare the package’s use forms against (B0019).

fn version(&self, _package: &str, _entry_dir: Option<&Path>) -> Option<String>

Bidama package’s Bluefile version, when the loader can read it — what a legacy_names window is measured against.

fn parse(&self, src: &str) -> Result<Vec<Spanned>, ParseError>

The spanned tree of one source this loader handed out, or of the entry. Resolution parses through here, so a loader that has seen a text before (an editor’s session) can answer without parsing it again.

fn available(&self) -> Vec<String>

Every bidama this loader could load, by name, when it can enumerate them: what an editor offers behind a use the file does not have yet.

fn frontend(&self, _entry: &Path) -> Option<Frontend>