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 Type String Expr
+:: VarDecl = VarDecl Pos Type String Expr
:: Type
= TupleType (Type, Type)
| ListType Type
| CharType
| VarType
:: Expr
- = VarExpr VarDef
- | Op2Expr Expr Op2 Expr
- | Op1Expr Op1 Expr
- | IntExpr Int
- | CharExpr Char
- | BoolExpr Bool
- | FunExpr FunCall
- | EmptyListExpr
- | TupleExpr (Expr, Expr)
+ = VarExpr Pos VarDef
+ | Op2Expr Pos Expr Op2 Expr
+ | Op1Expr Pos Op1 Expr
+ | IntExpr Pos Int
+ | CharExpr Pos Char
+ | BoolExpr Pos Bool
+ | FunExpr Pos FunCall
+ | EmptyListExpr Pos
+ | TupleExpr Pos (Expr, Expr)
:: VarDef = VarDef String [FieldSelector]
:: FieldSelector = FieldHd | FieldTl | FieldFst | FieldSnd
:: Op1 = UnNegation | UnMinus
:: Op2 = BiPlus | BiMinus | BiTimes | BiDivide | BiMod | BiEquals | BiLesser |
BiGreater | BiLesserEq | BiGreaterEq | BiUnEqual | BiAnd | BiOr | BiCons
-:: FunDecl = FunDecl String [String] (Maybe FunType) [VarDecl] [Stmt]
+:: FunDecl = FunDecl Pos String [String] (Maybe FunType) [VarDecl] [Stmt]
:: FunType = FunType [Type] (Maybe Type)
:: FunCall = FunCall String [Expr]
:: Stmt