The Right () results indicate successes: the parentheses matched. Prelude Text.Parsec> parse parens "" "()(())" Prelude Text.Parsec> parse parens "" "()" Prelude Text.Parsec> let parens = (many parenSet > eof) eof Prelude Text.Parsec> let parenSet = char '(' > many parenSet > char ')' :: Parsec String () Char Was made from GHCI (the interactive GHC environment), which we started cabal install parsecīelow we show how a very simple parser that tests matching parentheses This requires a working version of cabal and ghci, which are part ofĪny modern installation of Haskell, such asįirst install Parsec. We can find open source project that make use of Parsec. (an advanced fork of Parsec) as explained inīy analyzing Parsec's reverse dependencies on Hackage (Haskell's parser generator) as explained in twoĪnswers on separate StackExchange questions (Haskell's other prominent parser library) as explained in An introduction to parsing text in Haskell with Parsec on Wilson's blog.The 2001 paper written by Daan Leijen, some what outdated.It is simple, safe, wellĭocumented, has extensive libraries, good error messages, and is fast. Parsec is designedįrom scratch as an industrial-strength parser library. Please refer to the package description on Hackage for more information.Ī monadic parser combinator library, written by Daan Leijen. The exchange, which closed a $100M Series B round last June, faces pressure from Nevada state regulators, who on Thursday issued a cease and desist order that prompted the exchange to freeze withdrawals and deposits. Sheehan told The Defiant, adding, “They claim otherwise.” “The catalyst is all of the news around TUSD and Prime Trust, who had to halt deposits/withdrawals,” Parsec founder William Shehan. In addition, Ripcord, a service that alerts users to issues with TUSD reserves, showed discrepancies in the funds.Ī discrepancy on June 20 occurred “due to a delay in one of the new banking partner's API interface, which prevented the auditor(TNF) from reading the bank's latest escrow balance,” according to a Twitter thread from TrueUSD that went on to say “TUSD is 100% reserved and the attestation report is live again.” Contributing Factors “TUSD mints via Prime Trust are paused for further notification,” said a statement from TUSD on June 9. The report suggests that regulators could indirectly target DeFi protocols by focusing on dollar-pegged coins. TUSD concerns come as stablecoins as a whole are facing heightened regulatory pressure from the SEC, according to a report by investment bank Berenberg. On two occasions-June 10 and 14-Coingecko recorded TUSD slipping as low as $0.993. TUSD issuer TrueUSD halted TUSD mints via the exchange on June 9. TUSD jitters began in early June after the Prime Trust exchange suspended deposits and withdrawals. This brings the total number of long positions just over $90,000 across AAVE and Fuse protocols, while short positions against the stablecoin lie just under $5M as per data from the Parsec crypto data platform. A short trade is an investment strategy in which an investor sells borrowed assets with the intention of buying them back later at a lower price, aiming to profit from a decline in the asset's price. Shorts against TUSD have increased over time, and on June 21, one trader opened a $4M positions using the Aave protocol. Traders are shorting TUSD as concerns mount that the stablecoin may again shed its dollar peg.
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