You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: compile.rs
    path of file: ./repos/erg/crates/erg_compiler
    
    the code of the file until where you have to start completion: //! defines `Compiler`.
//!
//! コンパイラーを定義する
use std::path::Path;

use erg_common::config::ErgConfig;
use erg_common::dict::Dict;
use erg_common::error::{ErrorDisplay, ErrorKind, MultiErrorDisplay};
use erg_common::log;
use erg_common::traits::{BlockKind, ExitStatus, New, Runnable, Stream};

use erg_parser::ast::{VarName, AST};
use erg_parser::ParserRunner;

use crate::artifact::{Buildable, CompleteArtifact, ErrorArtifact};
use crate::build_package::PackageBuilder;
use crate::codegen::PyCodeGenerator;
use crate::context::{Context, ContextProvider};
use crate::desugar_hir::HIRDesugarer;
use crate::error::{CompileError, CompileErrors, CompileWarnings};
use crate::hir::Expr;
use crate::link_hir::HIRLinker;
use crate::module::SharedCompilerResource;
use crate::optimize::HIROptimizer;
use crate::ty::codeobj::CodeObj;
use crate::varinfo::VarInfo;

/// * registered as global -> Global
/// * defined in the toplevel scope (and called in the inner scope) -> Global
/// * defined and called in the toplevel scope -> Local
/// * not defined in the toplevel and called in the inner sco
    
    fn finish(&mut self) {}

    fn initialize(&mut self) {
        self.builder.initialize();
        self.code_generator.clear();
        // .mod_cache will be initialized in .builder
    }

    fn clear(&mut self) {
        self.builder.clear();
        self.code_generator.clear();
    }

    fn set_input(&mut self, input: erg_common::io::Input) {
        self.cfg.input = input;
        self.builder.set_input(self.cfg.input.clone());
        self.code_generator.set_input(self.cfg.input.clone());
    }

    fn exec(&mut self) -> Result<ExitStatus, Self::Errs> {
        let path = self.cfg.dump_pyc_path();
        let src = self.cfg.input.read();
        let warns = self
            .compile_and_dump_as_pyc(path, src, "exec")
            .map_err(|eart| {
                eart.warns.write_all_stderr();
                eart.errors
            })?;
        warns.write_all_stderr();
        Ok(ExitStatus::compile_passed(warns.len()))
    }

    fn eval(&mut self, src: String) -> Result<String, CompileErrors> {
        let arti = self.compile(src, "eval").map_err(|eart| {
            eart.warns.write_all_stderr();
            eart.errors
        })?;
        arti.warns.write_all_stderr();
        Ok(arti.object.code_info(Some(self.code_generator.py_version)))
    }

    fn expect_block(&self, src: &str) -> BlockKind {
        let mut parser = ParserRunner::new(self.cfg().clone());
        match parser.eval(src.to_string()) {
            Err(errs) => {
                let kind = errs
                    .iter()
                    .filter(|e| e.core().kind == ErrorKind::ExpectNextLine)
                    .map(|e| {
                        let msg = e.core().sub_messages.last().unwrap();
                        // ExpectNextLine error must have msg otherwise it's a bug
                        msg.get_msg().first().unwrap().to_owned()
                    })
                    .next();
                if let Some(kind) = kind {
                    return BlockKind::from(kind.as_str());
                }
                if errs
                    .iter()
                    .any(|err| err.core.main_message.contains("\"\"\""))
                {
                    return BlockKind::MultiLineStr;
                }
                BlockKind::Error
            }
            Ok(_) => {
                if src.contains("Class") {
                    return BlockKind::ClassDef;
                }
                BlockKind::None
            }
        }
    }
}