skeleton

src/source.rs

@@ -0,0 +1,59 @@
+use std::{
+    hash::{Hash, Hasher},
+    sync::{Arc, LazyLock},
+};
+
+use crate::Line;
+#[allow(unused_imports)]
+use crate::prelude::*;
+use crate::color::{ANSI_CYAN, ANSI_RESET};
+
+#[derive(Debug, Clone, PartialEq, Hash)]
+pub struct SourceLine {
+    pub line: Line,
+    pub path: Arc<Path>,
+    pub text: Arc<str>,
+}
+
+impl Display for SourceLine {
+    fn fmt(&self, f: &mut Formatter) -> FmtResult {
+        write!(f, "line {:03}: `{ANSI_CYAN}{}{ANSI_RESET}`", self.line.linenr(), self.text.trim())
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Hash)]
+pub struct SourcePath {
+    path: Arc<Path>,
+}
+
+#[derive(Debug, Clone)]
+pub struct SourceFile {
+    path: Arc<Path>,
+    file: Arc<File>,
+}
+
+impl PartialEq for SourceFile {
+    fn eq(&self, other: &Self) -> bool {
+        let paths_match = *self.path == *other.path;
+        if paths_match && self.file.as_raw_fd() != other.file.as_raw_fd() {
+            todo!("handle the case where source file paths match but FD numbers don't");
+        }
+        paths_match
+    }
+}
+
+impl Hash for SourceFile {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.path.hash(state);
+        self.file.as_raw_fd().hash(state);
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Hash)]
+enum SourceInner {
+    Path(SourcePath),
+    File(SourceFile),
+}
+
+#[derive(Debug, Clone, PartialEq, Hash)]
+pub struct Source(SourceInner);