refactor: make HashType and Base enum classes for type safety

Change-Id: I9fbd55a9d50464a56fe11cb42a06a206914150d8

2 files changed, 9 insertions, 9 deletions

diff --git a/src/libexpr/primops/fetchMercurial.cc b/src/libexpr/primops/fetchMercurial.cc
index 261722d1b..2031be299 100644
--- a/src/libexpr/primops/fetchMercurial.cc
+++ b/src/libexpr/primops/fetchMercurial.cc
@@ -31,7 +31,7 @@ static void prim_fetchMercurial(EvalState & state, const PosIdx pos, Value * * a
                 // be both a revision or a branch/tag name.
                 auto value = state.forceStringNoCtx(*attr.value, attr.pos, "while evaluating the `rev` attribute passed to builtins.fetchMercurial");
                 if (std::regex_match(value.begin(), value.end(), revRegex))
-                    rev = Hash::parseAny(value, htSHA1);
+                    rev = Hash::parseAny(value, HashType::SHA1);
                 else
                     ref = value;
             }
@@ -73,7 +73,7 @@ static void prim_fetchMercurial(EvalState & state, const PosIdx pos, Value * * a
         attrs2.alloc("branch").mkString(*input2.getRef());
     // Backward compatibility: set 'rev' to
     // 0000000000000000000000000000000000000000 for a dirty tree.
-    auto rev2 = input2.getRev().value_or(Hash(htSHA1));
+    auto rev2 = input2.getRev().value_or(Hash(HashType::SHA1));
     attrs2.alloc("rev").mkString(rev2.gitRev());
     attrs2.alloc("shortRev").mkString(rev2.gitRev().substr(0, 12));
     if (auto revCount = input2.getRevCount())
diff --git a/src/libexpr/primops/fetchTree.cc b/src/libexpr/primops/fetchTree.cc
index e289fe9ca..b0e14a26e 100644
--- a/src/libexpr/primops/fetchTree.cc
+++ b/src/libexpr/primops/fetchTree.cc
@@ -32,7 +32,7 @@ void emitTreeAttrs(
 
     auto narHash = input.getNarHash();
     assert(narHash);
-    attrs.alloc("narHash").mkString(narHash->to_string(SRI, true));
+    attrs.alloc("narHash").mkString(narHash->to_string(Base::SRI, true));
 
     if (input.getType() == "git")
         attrs.alloc("submodules").mkBool(
@@ -45,7 +45,7 @@ void emitTreeAttrs(
             attrs.alloc("shortRev").mkString(rev->gitShortRev());
         } else if (emptyRevFallback) {
             // Backwards compat for `builtins.fetchGit`: dirty repos return an empty sha1 as rev
-            auto emptyHash = Hash(htSHA1);
+            auto emptyHash = Hash(HashType::SHA1);
             attrs.alloc("rev").mkString(emptyHash.gitRev());
             attrs.alloc("shortRev").mkString(emptyHash.gitShortRev());
         }
@@ -226,7 +226,7 @@ static void fetch(EvalState & state, const PosIdx pos, Value * * args, Value & v
             if (n == "url")
                 url = state.forceStringNoCtx(*attr.value, attr.pos, "while evaluating the url we should fetch");
             else if (n == "sha256")
-                expectedHash = newHashAllowEmpty(state.forceStringNoCtx(*attr.value, attr.pos, "while evaluating the sha256 of the content we should fetch"), htSHA256);
+                expectedHash = newHashAllowEmpty(state.forceStringNoCtx(*attr.value, attr.pos, "while evaluating the sha256 of the content we should fetch"), HashType::SHA256);
             else if (n == "name")
                 name = state.forceStringNoCtx(*attr.value, attr.pos, "while evaluating the name of the content we should fetch");
             else
@@ -252,7 +252,7 @@ static void fetch(EvalState & state, const PosIdx pos, Value * * args, Value & v
         state.error<EvalError>("in pure evaluation mode, '%s' requires a 'sha256' argument", who).atPos(pos).debugThrow();
 
     // early exit if pinned and already in the store
-    if (expectedHash && expectedHash->type == htSHA256) {
+    if (expectedHash && expectedHash->type == HashType::SHA256) {
         auto expectedPath = state.store->makeFixedOutputPath(
             name,
             FixedOutputInfo {
@@ -277,13 +277,13 @@ static void fetch(EvalState & state, const PosIdx pos, Value * * args, Value & v
     if (expectedHash) {
         auto hash = unpack
             ? state.store->queryPathInfo(storePath)->narHash
-            : hashFile(htSHA256, state.store->toRealPath(storePath));
+            : hashFile(HashType::SHA256, state.store->toRealPath(storePath));
         if (hash != *expectedHash) {
             state.error<EvalError>(
                 "hash mismatch in file downloaded from '%s':\n  specified: %s\n  got:       %s",
                 *url,
-                expectedHash->to_string(Base32, true),
-                hash.to_string(Base32, true)
+                expectedHash->to_string(Base::Base32, true),
+                hash.to_string(Base::Base32, true)
             ).withExitStatus(102)
             .debugThrow();
         }