from Data.Maybe import :: Maybe
from StdOverloaded import class toString
-/*
- * Type errors can happen in either
- * - variable declarations (x :: Int = True)
- * - function declarations (f :: (Char -> Int) = (+)1)
- * - Expressions (1 + 'a')
- * So these are the items that will get position metadata
- */
-
:: Pos = {line :: Int, col :: Int}
-
:: AST = AST [VarDecl] [FunDecl]
:: VarDecl = VarDecl Pos Type String Expr
:: Type
= TupleType (Type, Type)
| ListType Type
- | IdType String
+ | IdType String
| IntType
| BoolType
| CharType
| VarType
+ | VoidType
+ | (->>) infixl 7 Type Type
:: Expr
= VarExpr Pos VarDef
| Op2Expr Pos Expr Op2 Expr
:: Op1 = UnNegation | UnMinus
:: Op2 = BiPlus | BiMinus | BiTimes | BiDivide | BiMod | BiEquals | BiLesser |
BiGreater | BiLesserEq | BiGreaterEq | BiUnEqual | BiAnd | BiOr | BiCons
-
-:: FunDecl = FunDecl Pos String [String] (Maybe FunType) [VarDecl] [Stmt]
-:: FunType = FunType [Type] (Maybe Type)
+:: FunDecl = FunDecl Pos String [String] (Maybe Type) [VarDecl] [Stmt]
:: FunCall = FunCall String [Expr]
:: Stmt
= IfStmt Expr [Stmt] [Stmt]
| ReturnStmt (Maybe Expr)
instance toString AST
+instance toString Type
+instance toString Pos