From 4c6fd6e670264b01a84ee76e99e28d6be7789f1a Mon Sep 17 00:00:00 2001
From: David Li <li.davidm96@gmail.com>
Date: Tue, 7 Nov 2017 16:50:39 -0500
Subject: Add stub of frame module

---
 src/semantic/frame.rs | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/semantic/frame.rs

(limited to 'src/semantic/frame.rs')

diff --git a/src/semantic/frame.rs b/src/semantic/frame.rs
new file mode 100644
index 0000000..ddfc330
--- /dev/null
+++ b/src/semantic/frame.rs
@@ -0,0 +1,44 @@
+use super::temp;
+
+pub enum Location {
+    InFrame {
+        offset: usize,
+    },
+    Register(temp::TempName),
+}
+
+pub enum Escape {
+    No,
+    Yes,
+}
+
+pub trait Frame {
+    fn new(name: temp::TempLabel, formals: Vec<Escape>) -> Self;
+    fn name(&self) -> temp::TempLabel;
+    fn formals(&self) -> &[Location];
+    fn alloc_local(&mut self, escapes: Escape) -> Location;
+}
+
+pub struct Amd64Frame {
+    name: temp::TempLabel,
+}
+
+impl Frame for Amd64Frame {
+    fn new(name: temp::TempLabel, formals: Vec<Escape>) -> Self {
+        Amd64Frame {
+            name,
+        }
+    }
+
+    fn name(&self) -> temp::TempLabel {
+        self.name
+    }
+
+    fn formals(&self) -> &[Location] {
+        unimplemented!();
+    }
+
+    fn alloc_local(&mut self, escapes: Escape) -> Location {
+        unimplemented!();
+    }
+}
-- 
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