cairo-lang-filesystem 2.9.0-dev.0

Virtual filesystem for the compiler.
Documentation 
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use cairo_lang_utils::Upcast;

use crate::db::{AsFilesGroupMut, ExternalFiles, FilesDatabase, FilesGroup, init_files_group};

// Test salsa database.
#[salsa::database(FilesDatabase)]
pub struct FilesDatabaseForTesting {
    storage: salsa::Storage<FilesDatabaseForTesting>,
}
impl salsa::Database for FilesDatabaseForTesting {}
impl ExternalFiles for FilesDatabaseForTesting {}
impl Default for FilesDatabaseForTesting {
    fn default() -> Self {
        let mut res = Self { storage: Default::default() };
        init_files_group(&mut res);
        res
    }
}
impl Upcast<dyn FilesGroup> for FilesDatabaseForTesting {
    fn upcast(&self) -> &(dyn FilesGroup + 'static) {
        self
    }
}
impl AsFilesGroupMut for FilesDatabaseForTesting {
    fn as_files_group_mut(&mut self) -> &mut (dyn FilesGroup + 'static) {
        self
    }
}