Add string and float literals to the object language

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

src/Bergamot/ObjectLanguage.elm

@@ -1,6 +1,7 @@
 module Bergamot.ObjectLanguage exposing (..)
 
 import Bergamot.Syntax as Syntax exposing (Metavariable)
+import Bergamot.Parser exposing (strLit)
 
 import Parser exposing (Parser, Trailing(..), (|.), (|=))
 import Set
@@ -13,6 +14,7 @@ type Type
 
 type Expr
     = IntLit Int
+    | FloatLit Float
     | StrLit String
     | Plus Expr Expr
     | Pair Expr Expr
@@ -99,7 +101,15 @@ exprApps =
 
 exprBasic : Parser Expr
 exprBasic = Parser.lazy <| \() -> Parser.oneOf
-    [ Parser.backtrackable (Parser.succeed IntLit |= Parser.int)
+    [ Parser.backtrackable <|
+      Parser.number
+        { int = Just IntLit
+        , hex = Nothing
+        , octal = Nothing
+        , binary = Nothing
+        , float = Just FloatLit
+        }
+    , Parser.backtrackable (Parser.succeed StrLit |= strLit)
     , Parser.backtrackable <| Parser.map (\(a, b) -> Pair a b) <| pair expr
     , Parser.succeed Fst
         |. Parser.keyword "fst"
@@ -137,6 +147,7 @@ exprToTerm : Expr -> Syntax.Term Metavariable
 exprToTerm e =
     case e of
         IntLit i -> Syntax.Call "intlit" [Syntax.IntLit i]
+        FloatLit f -> Syntax.Call "floatlit" [Syntax.FloatLit f]
         StrLit s -> Syntax.Call "strlit" [Syntax.StringLit s]
         Plus e1 e2 -> Syntax.Call "plus" [exprToTerm e1, exprToTerm e2]
         Pair e1 e2 -> Syntax.Call "pair" [exprToTerm e1, exprToTerm e2]