Haskell-src-exts 抛出模板Haskell 错误

Question

我正在尝试使用 haskell-src-exts package to parse Haskell modules. Currently, I'm trying to parse the acme-io 包的模块，但无论我尝试哪种解析模式，我都会收到此错误：

*** Exception: fromParseResult: Parse failed at [System/IO/Unsafe/Really/IMeanIt] (1:57): TemplateHaskell is not enabled

提到的模块没有引用 TemplateHaskell，不在它的 LANGUAGE 编译指示中，源文件中也没有 $。

我想知道我的解析模式是否与它有关 - 这里是：

defaultParseMode { parseFilename = toFilePath m
                 , baseLanguage = Haskell2010
                 , extensions = []
                 , ignoreLanguagePragmas = True
                 , ignoreLinePragmas = True
                 , fixities = Nothing
                 }

我也曾尝试用 the parsing suite 中的 knownExtensions 替换 extensions 字段，但没有成功。

Answer 1

这是一个重复的问题 this answer - using the parseFile function fixed the issue. However, the reader should note that haskell-src-exts uses different parsing than GHC - I ran into another similar issue right after this, because haskell-src-exts can't handle multi-param contexts without -XMultiParamTypeClasses, yet GHC can, borking the parser if you're scraping Hackage. Hint 可能是更好的选择，但不能肯定。

Haskell-src-exts 抛出模板Haskell 错误

Haskell-src-exts throws TemplateHaskell error

parsing

haskell

abstract-syntax-tree

template-haskell