expr = QuasiQuoter { quoteExp = parseExprExp, quotePat = parseExprPat,
                     quoteType = undefined, quoteDec = undefined }
expr = QuasiQuoter { quoteExp = parseExprExp, quotePat = parseExprPat,
                     quoteType = undefined, quoteDec = undefined }
expr = QuasiQuoter { quoteExp = parseExprExp, quotePat = parseExprPat,
                     quoteType = undefined, quoteDec = undefined }