From 5e6fe2d2c99012b4c18f215c1974bd55e4d2cce6 Mon Sep 17 00:00:00 2001
From: Yuta Saito <kateinoigakukun@gmail.com>
Date: Sun, 26 Jun 2022 03:42:37 +0900
Subject: [PATCH] Fix build and tests for 5.7 toolchain (#499)

---
 .github/workflows/ci.yml                               | 10 +++++++++-
 .../Reflection/Pointers/MetadataOffset.swift           |  4 +++-
 Sources/TokamakDOM/Storage/WebStorage.swift            |  2 +-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9d3a3617d..d56b77522 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,11 +20,19 @@ jobs:
           ls -la Bundle
           ls -lh Bundle/*.wasm | awk '{printf  "::warning file=Sources/TokamakDemo/main.swift,line=1,col=1::TokamakDemo Wasm is %s.",$5}'
 
-  swiftwasm_test_5_6:
+  swiftwasm_test:
     runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: true
+      matrix:
+        include:
+          - { toolchain: wasm-5.6.0-RELEASE }
+          - { toolchain: wasm-5.7-SNAPSHOT-2022-06-01-a }
+          - { toolchain: wasm-DEVELOPMENT-SNAPSHOT-2022-06-23-a }
 
     steps:
       - uses: actions/checkout@v2
+      - run: echo "${{ matrix.toolchain }}" > .swift-version
       - uses: swiftwasm/swiftwasm-action@v5.6
         with:
           shell-action: carton test --environment node
diff --git a/Sources/TokamakCore/Reflection/Pointers/MetadataOffset.swift b/Sources/TokamakCore/Reflection/Pointers/MetadataOffset.swift
index 83cec8ced..794e3faa7 100644
--- a/Sources/TokamakCore/Reflection/Pointers/MetadataOffset.swift
+++ b/Sources/TokamakCore/Reflection/Pointers/MetadataOffset.swift
@@ -24,7 +24,9 @@ struct MetadataOffset<Pointee> {
   let offset: Int32
 
   func apply(to ptr: UnsafeRawPointer) -> UnsafePointer<Pointee> {
-    #if arch(wasm32)
+    // Data pointers in constant metadata are absolute until SwiftWasm 5.6
+    // Since SwiftWasm 5.7, they are relative as well as other platforms.
+    #if arch(wasm32) && !compiler(>=5.7)
     return UnsafePointer<Pointee>(bitPattern: Int(offset))!
     #else
     return ptr.advanced(by: numericCast(offset)).assumingMemoryBound(to: Pointee.self)
diff --git a/Sources/TokamakDOM/Storage/WebStorage.swift b/Sources/TokamakDOM/Storage/WebStorage.swift
index 2daecf53f..2cbe27562 100644
--- a/Sources/TokamakDOM/Storage/WebStorage.swift
+++ b/Sources/TokamakDOM/Storage/WebStorage.swift
@@ -73,6 +73,6 @@ extension WebStorage {
   }
 
   public func read(key: String) -> String? {
-    getItem(key: key, String.init)
+    getItem(key: key, { $0 })
   }
 }