84 lines
2.8 KiB
Swift
84 lines
2.8 KiB
Swift
// MIT License
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//
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// Copyright (c) 2020 Point-Free, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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import Foundation
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@_transparent
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@usableFromInline
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@inline(__always)
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func runtimeWarn(
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_ message: @autoclosure () -> String,
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category: String? = "SwiftUIIntrospect"
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) {
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#if DEBUG
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let message = message()
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let category = category ?? "Runtime Warning"
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#if canImport(os)
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os_log(
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.fault,
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dso: dso,
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log: OSLog(subsystem: "com.apple.runtime-issues", category: category),
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"%@",
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message
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)
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#else
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fputs("\(formatter.string(from: Date())) [\(category)] \(message)\n", stderr)
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#endif
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#endif
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}
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#if DEBUG
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#if canImport(os)
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import os
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// NB: Xcode runtime warnings offer a much better experience than traditional assertions and
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// breakpoints, but Apple provides no means of creating custom runtime warnings ourselves.
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// To work around this, we hook into SwiftUI's runtime issue delivery mechanism, instead.
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//
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// Feedback filed: https://gist.github.com/stephencelis/a8d06383ed6ccde3e5ef5d1b3ad52bbc
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@usableFromInline
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let dso = { () -> UnsafeMutableRawPointer in
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let count = _dyld_image_count()
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for i in 0..<count {
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if let name = _dyld_get_image_name(i) {
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let swiftString = String(cString: name)
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if swiftString.hasSuffix("/SwiftUI") {
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if let header = _dyld_get_image_header(i) {
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return UnsafeMutableRawPointer(mutating: UnsafeRawPointer(header))
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}
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}
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}
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}
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return UnsafeMutableRawPointer(mutating: #dsohandle)
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}()
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#else
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import Foundation
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@usableFromInline
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let formatter: DateFormatter = {
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let formatter = DateFormatter()
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formatter.dateFormat = "yyyy-MM-dd HH:MM:SS.sssZ"
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return formatter
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}()
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#endif
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#endif
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