from StdString import class toString
from lex import :: LexerOutput, :: Error, :: Token, :: TokenValue, :: Pos
-from AST import :: AST
+from AST import :: AST, :: Expr
:: ParserOutput :== Either Error AST
-parser :: LexerOutput -> ParserOutput
+parser :: [Token] -> ParserOutput
+makeStrExpr :: Pos [Char] -> Expr