proc openParser(p: var Parser; fileIdx: FileIndex; inputstream: PLLStream;
                cache: IdentCache; config: ConfigRef) {...}{.
    raises: [IOError, Exception, ValueError, ERecoverableError, KeyError], tags: [
    ReadIOEffect, RootEffect, WriteIOEffect, ReadEnvEffect, ReadDirEffect].}

proc setupParser(p: var Parser; fileIdx: FileIndex; cache: IdentCache;
                 config: ConfigRef): bool {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError, KeyError], tags: [
    RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect, ReadDirEffect].}

proc parseFile(fileIdx: FileIndex; cache: IdentCache; config: ConfigRef): PNode {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError, KeyError], tags: [
    RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect, ReadDirEffect].}