parser: support float expressions

trunk_parser/src/ast.rs

@@ -303,6 +303,9 @@ pub enum Expression {
     Int {
         i: i64
     },
+    Float {
+        f: f64,
+    },
     Variable {
         name: String
     },

trunk_parser/src/parser/mod.rs

@@ -992,6 +992,11 @@ impl Parser {
                 self.next();
                 e
             },
+            TokenKind::Float(f) => {
+                let f = Expression::Float { f: *f };
+                self.next();
+                f
+            },
             TokenKind::Identifier(i) | TokenKind::QualifiedIdentifier(i) | TokenKind::FullyQualifiedIdentifier(i) => {
                 let e = Expression::Identifier { name: i.to_string() };
                 self.next();