proc hashNonProc(s: PSym): SigHash {....raises: [Exception, OSError, KeyError,
    ValueError, IOError], tags: [RootEffect, WriteIOEffect, ReadEnvEffect,
                                 ReadIOEffect, ReadDirEffect], forbids: [].}

proc hashOwner(s: PSym): SigHash {....raises: [Exception, OSError, KeyError,
    ValueError, IOError], tags: [RootEffect, WriteIOEffect, ReadEnvEffect,
                                 ReadIOEffect, ReadDirEffect], forbids: [].}

proc hashType(t: PType; conf: ConfigRef; flags: set[ConsiderFlag] = {CoType}): SigHash {.
    ...raises: [Exception, OSError, KeyError, ValueError, IOError], tags: [
    RootEffect, WriteIOEffect, ReadEnvEffect, ReadIOEffect, ReadDirEffect],
    forbids: [].}

proc idOrSig(s: PSym; currentModule: string;
             sigCollisions: var CountTable[SigHash]; conf: ConfigRef): Rope {.
    ...raises: [Exception, OSError, KeyError, ValueError, IOError], tags: [
    RootEffect, WriteIOEffect, ReadEnvEffect, ReadIOEffect, ReadDirEffect],
    forbids: [].}

proc sigHash(s: PSym; conf: ConfigRef): SigHash {.
    ...raises: [Exception, OSError, KeyError, ValueError, IOError], tags: [
    RootEffect, WriteIOEffect, ReadEnvEffect, ReadIOEffect, ReadDirEffect],
    forbids: [].}

proc symBodyDigest(graph: ModuleGraph; sym: PSym): SigHash {.
    ...raises: [Exception, OSError, KeyError, ValueError, IOError], tags: [
    RootEffect, WriteIOEffect, ReadEnvEffect, ReadIOEffect, ReadDirEffect],
    forbids: [].}