Function rustc_interface::passes::configure_and_expand

pub fn configure_and_expand(
    sess: Lrc<Session>, 
    lint_store: Lrc<LintStore>, 
    metadata_loader: Box<MetadataLoaderDyn>, 
    krate: Crate, 
    crate_name: &str
) -> Result<(Crate, BoxedResolver)>

Runs the "early phases" of the compiler: initial cfg processing, loading compiler plugins, syntax expansion, secondary cfg expansion, synthesis of a test harness if one is to be provided, injection of a dependency on the standard library and prelude, and name resolution.

Returns None if we're aborting after handling -W help.