Add support for multiple integer types.

src/syntax/ast.rs

@@ -1,3 +1,4 @@
+pub use crate::syntax::tokens::ConstantType;
 use crate::syntax::Location;
 
 /// The set of valid binary operators.
@@ -76,7 +77,7 @@ impl PartialEq for Expression {
             Expression::Cast(_, t1, e1) => match other {
                 Expression::Cast(_, t2, e2) => t1 == t2 && e1 == e2,
                 _ => false,
-            }
+            },
             Expression::Primitive(_, prim1, args1) => match other {
                 Expression::Primitive(_, prim2, args2) => prim1 == prim2 && args1 == args2,
                 _ => false,
@@ -88,6 +89,12 @@ impl PartialEq for Expression {
 /// A value from the source syntax
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum Value {
-    /// The value of the number, and an optional base that it was written in
-    Number(Option<u8>, i64),
+    /// The value of the number, an optional base that it was written in, and any
+    /// type information provided.
+    ///
+    /// u64 is chosen because it should be big enough to carry the amount of
+    /// information we need, and technically we interpret -4 as the primitive unary
+    /// operation "-" on the number 4. We'll translate this into a type-specific
+    /// number at a later time.
+    Number(Option<u8>, Option<ConstantType>, u64),
 }