diff --git a/src/cli/mod.rs b/src/cli/mod.rs
index 70db149..ea87b49 100644
--- a/src/cli/mod.rs
+++ b/src/cli/mod.rs
@@ -144,7 +144,7 @@ impl Cli {
 
 impl ValueEnum for LogLevel {
     fn value_variants<'a>() -> &'a [Self] {
-        return &[Self::Debug, Self::Info, Self::Warn, Self::Error, Self::None]
+        &[Self::Debug, Self::Info, Self::Warn, Self::Error, Self::None]
     }
 
     fn to_possible_value(&self) -> Option<PossibleValue> {
@@ -156,7 +156,7 @@ impl ValueEnum for LogLevel {
             LogLevel::None => { "none" }
         };
 
-        return Some(
+        Some(
             PossibleValue::new(name)
         )
     }
diff --git a/src/compiler/cst/parser.rs b/src/compiler/cst/parser.rs
index 6a715cf..e72d6d4 100644
--- a/src/compiler/cst/parser.rs
+++ b/src/compiler/cst/parser.rs
@@ -7,12 +7,14 @@ use crate::compiler::cst::{
     CstActualParameter, CstAtom, CstConstantStatement, CstEmitStatement, CstFunctionStatement,
 };
 use crate::match_ast;
+use crate::util::logger;
 
 #[derive(Default)]
 pub(crate) struct CstParser {}
 
 impl CstParser {
     pub(crate) fn parse(&self, path: &Path, ast_root: AstNode) -> Result<CstFile, Error> {
+        logger::debug!("Parsing CST of {:?}", path);
         parse_file(path, &ast_root)
     }
 }
diff --git a/src/compiler/compiler.rs b/src/compiler/hexo_compiler.rs
similarity index 100%
rename from src/compiler/compiler.rs
rename to src/compiler/hexo_compiler.rs
diff --git a/src/compiler/mod.rs b/src/compiler/mod.rs
index 8fb413a..a4c3493 100644
--- a/src/compiler/mod.rs
+++ b/src/compiler/mod.rs
@@ -1,5 +1,5 @@
 mod compilation_result;
-mod compiler;
+mod hexo_compiler;
 mod compiler_context;
 mod compiler_source;
 mod error;
@@ -9,7 +9,7 @@ mod cst;
 mod ast;
 
 pub(crate) use compilation_result::Compilation;
-pub(crate) use compiler::HexoCompiler;
+pub(crate) use hexo_compiler::HexoCompiler;
 pub(crate) use compiler_context::HexoCompilerContext;
 pub(crate) use compiler_source::{CompilerSource, FileCompilerSource};
 pub(crate) use error::Error;
diff --git a/src/util/logger.rs b/src/util/logger.rs
index 0131737..657d212 100644
--- a/src/util/logger.rs
+++ b/src/util/logger.rs
@@ -41,7 +41,7 @@ pub(crate) struct HexoLogger {
 
 impl HexoLogger {
     pub(crate) fn level(&self) -> &LogLevel {
-        return &self.level;
+        &self.level
     }
 
     pub(crate) fn set_level(level: LogLevel) {