1 files changed, 39 insertions, 0 deletions
diff --git a/src/semantic/translate.rs b/src/semantic/translate.rs
new file mode 100644
index 0000000..7bcd646
--- /dev/null
+++ b/src/semantic/translate.rs
@@ -0,0 +1,39 @@
+use ::ast::{self, WithLocation};
+use super::environment;
+use super::types::Ty;
+
+#[derive(Debug)]
+pub enum TypeError {
+    Unimplemented,
+}
+
+type TypeEnvironment<'a> = environment::Environment<'a, String, Ty>;
+pub type Result = ::std::result::Result<Ty, WithLocation<TypeError>>;
+
+pub fn translate(program: &ast::Program) -> Result {
+    trans_exp(TypeEnvironment::new(None), &*program.0)
+}
+
+fn trans_exp<'a>(venv: TypeEnvironment<'a>, exp: &WithLocation<ast::Expression>) -> Result {
+    use ast::Expression::*;
+
+    match &exp.value {
+        &Let(ref decls, ref body) => {
+            Err(WithLocation::new(TypeError::Unimplemented, exp.start, exp.end))
+        },
+        &UnaryOp(ref op, ref operand) => {
+            Err(WithLocation::new(TypeError::Unimplemented, exp.start, exp.end))
+        },
+        &BinOp(ref op, ref left, ref right) => {
+            Err(WithLocation::new(TypeError::Unimplemented, exp.start, exp.end))
+        },
+        &Number(_) => Ok(Ty::Int),
+        &String(_) => Ok(Ty::String),
+        &Name(ref name) => {
+            Err(WithLocation::new(TypeError::Unimplemented, exp.start, exp.end))
+        },
+        &Nil => {
+            Err(WithLocation::new(TypeError::Unimplemented, exp.start, exp.end))
+        },
+    }
+}