cleanup and correct string literal content implementation

src/base/file_provider.rs

@@ -27,6 +27,15 @@ impl Default for FsProvider {
     }
 }
 
+impl<P> From<P> for FsProvider
+where
+    P: Into<PathBuf>,
+{
+    fn from(root: P) -> Self {
+        Self { root: root.into() }
+    }
+}
+
 impl FileProvider for FsProvider {
     fn read_to_string<P: AsRef<Path>>(&self, path: P) -> Result<String, Error> {
         let full_path = self.root.join(path);

src/base/log.rs

@@ -1,7 +1,6 @@
 //! Module containing structures and implementations for logging messages to the user.
 
 use colored::Colorize;
-use path_absolutize::Absolutize;
 use std::{fmt::Display, sync::Arc};
 
 use super::source_file::{Location, SourceFile, Span};
@@ -74,7 +73,7 @@ impl<'a, T> SourceCodeDisplay<'a, T> {
     }
 }
 
-impl<'a, T: std::fmt::Display> Display for SourceCodeDisplay<'a, T> {
+impl<'a, T: Display> Display for SourceCodeDisplay<'a, T> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let start_location = self.span.start_location();
         let end_location = self.span.end_location();
@@ -100,12 +99,7 @@ impl<'a, T: std::fmt::Display> Display for SourceCodeDisplay<'a, T> {
             "-->".cyan().bold(),
             format_args!(
                 "{}:{}:{}",
-                self.span
-                    .source_file()
-                    .path()
-                    .absolutize()
-                    .unwrap_or_else(|_| std::borrow::Cow::Borrowed(self.span.source_file().path()))
-                    .display(),
+                self.span.source_file().path().display(),
                 start_location.line,
                 start_location.column
             )

src/lexical/token.rs

@@ -1,6 +1,6 @@
 //! Contains the [`Token`] struct and its related types.
 
-use std::{collections::HashMap, str::FromStr, sync::OnceLock};
+use std::{borrow::Cow, collections::HashMap, fmt::Display, str::FromStr, sync::OnceLock};
 
 use crate::base::{
     source_file::{SourceElement, SourceIterator, Span},
@@ -42,9 +42,9 @@ pub enum KeywordKind {
     Import,
 }
 
-impl ToString for KeywordKind {
-    fn to_string(&self) -> String {
-        self.as_str().to_string()
+impl Display for KeywordKind {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.as_str())
     }
 }
 
@@ -259,11 +259,22 @@ pub struct StringLiteral {
 }
 
 impl StringLiteral {
-    /// Returns the string without the leading and trailing double quotes.
+    /// Returns the string content without escapement characters, leading and trailing double quotes.
     #[must_use]
-    pub fn str_content(&self) -> &str {
+    pub fn str_content(&self) -> Cow<str> {
         let string = self.span.str();
-        &string[1..string.len() - 1]
+        let string = &string[1..string.len() - 1];
+        if string.contains('\\') {
+            let escaped = string
+                .replace("\\n", "\n")
+                .replace("\\r", "\r")
+                .replace("\\t", "\t")
+                .replace("\\\"", "\"")
+                .replace("\\\\", "\\");
+            Cow::Owned(escaped)
+        } else {
+            Cow::Borrowed(string)
+        }
     }
 }
 
@@ -603,3 +614,38 @@ impl Token {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::base::source_file::SourceFile;
+    use shulkerbox::virtual_fs::{VFile, VFolder};
+    use std::path::Path;
+
+    use super::*;
+
+    fn get_span(content: &str) -> Span {
+        let source_file = VFile::Text(String::from(content));
+        let mut vfolder = VFolder::new();
+        vfolder.add_file("test.shu", source_file);
+        let source_file = SourceFile::load(Path::new("test.shu"), &vfolder).unwrap();
+
+        Span::new(source_file, 0, content.len()).unwrap()
+    }
+
+    #[test]
+    fn test_string_literal() {
+        let span = get_span(r#""Hello, World!""#);
+        let string_literal = StringLiteral { span };
+
+        let content = string_literal.str_content();
+        assert_eq!(content, "Hello, World!");
+        assert!(matches!(content, Cow::Borrowed(_)));
+
+        let escaped_string_literal = StringLiteral {
+            span: get_span(r#""Hello, \"World\"!""#),
+        };
+        let escaped_content = escaped_string_literal.str_content();
+        assert_eq!(escaped_content, "Hello, \"World\"!");
+        assert!(matches!(escaped_content, Cow::Owned(_)));
+    }
+}

src/syntax/syntax_tree/program.rs

@@ -89,9 +89,9 @@ impl<'a> Parser<'a> {
                 // eat the keyword
                 self.forward();
 
-                let namespace_name = self
-                    .parse_string_literal(handler)
-                    .and_then(|name| Namespace::validate_str(name.str_content()).then_some(name))?;
+                let namespace_name = self.parse_string_literal(handler).and_then(|name| {
+                    Namespace::validate_str(name.str_content().as_ref()).then_some(name)
+                })?;
 
                 let semicolon = self.parse_punctuation(';', true, handler)?;