Add lexer

1 files changed, 61 insertions, 0 deletions

diff --git a/compiler/src/span.rs b/compiler/src/span.rs
new file mode 100644
index 0000000..0644c1c
--- /dev/null
+++ b/compiler/src/span.rs
@@ -0,0 +1,61 @@
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct Pos {
+    line: usize,
+    column: usize,
+    cursor: usize,
+}
+
+impl Pos {
+    pub fn new(line: usize, column: usize, cursor: usize) -> Self {
+        Self {
+            line,
+            column,
+            cursor,
+        }
+    }
+
+    pub fn line(self) -> usize {
+        self.line
+    }
+
+    pub fn column(self) -> usize {
+        self.column
+    }
+
+    pub fn cursor(self) -> usize {
+        self.cursor
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct Span<T> {
+    inner: T,
+    start: Pos,
+    end: Pos,
+}
+
+impl<T> Span<T> {
+    pub fn new(inner: T, start: Pos, end: Pos) -> Self {
+        Self { inner, start, end }
+    }
+
+    pub fn inner(&self) -> &T {
+        &self.inner
+    }
+
+    pub fn inner_mut(&mut self) -> &mut T {
+        &mut self.inner
+    }
+
+    pub fn into_inner(self) -> T {
+        self.inner
+    }
+
+    pub fn start(&self) -> Pos {
+        self.start
+    }
+
+    pub fn end(&self) -> Pos {
+        self.end
+    }
+}