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Pods/SnapKit/Sources/ConstraintConstantTarget.swift
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Pods/SnapKit/Sources/ConstraintConstantTarget.swift
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//
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// SnapKit
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//
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// Copyright (c) 2011-Present SnapKit Team - https://github.com/SnapKit
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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
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// all 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
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// THE SOFTWARE.
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#if os(iOS) || os(tvOS)
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import UIKit
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#else
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import AppKit
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#endif
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public protocol ConstraintConstantTarget {
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}
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extension CGPoint: ConstraintConstantTarget {
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}
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extension CGSize: ConstraintConstantTarget {
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}
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extension ConstraintInsets: ConstraintConstantTarget {
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}
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#if os(iOS) || os(tvOS)
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@available(iOS 11.0, tvOS 11.0, *)
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extension ConstraintDirectionalInsets: ConstraintConstantTarget {
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}
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#endif
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extension ConstraintConstantTarget {
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internal func constraintConstantTargetValueFor(layoutAttribute: LayoutAttribute) -> CGFloat {
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if let value = self as? CGFloat {
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return value
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}
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if let value = self as? Float {
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return CGFloat(value)
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}
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if let value = self as? Double {
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return CGFloat(value)
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}
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if let value = self as? Int {
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return CGFloat(value)
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}
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if let value = self as? UInt {
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return CGFloat(value)
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}
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if let value = self as? CGSize {
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if layoutAttribute == .width {
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return value.width
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} else if layoutAttribute == .height {
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return value.height
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} else {
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return 0.0
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}
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}
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if let value = self as? CGPoint {
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#if os(iOS) || os(tvOS)
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switch layoutAttribute {
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case .left, .right, .leading, .trailing, .centerX, .leftMargin, .rightMargin, .leadingMargin, .trailingMargin, .centerXWithinMargins:
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return value.x
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case .top, .bottom, .centerY, .topMargin, .bottomMargin, .centerYWithinMargins, .lastBaseline, .firstBaseline:
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return value.y
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case .width, .height, .notAnAttribute:
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return 0.0
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#if swift(>=5.0)
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@unknown default:
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return 0.0
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#endif
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}
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#else
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switch layoutAttribute {
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case .left, .right, .leading, .trailing, .centerX:
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return value.x
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case .top, .bottom, .centerY, .lastBaseline, .firstBaseline:
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return value.y
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case .width, .height, .notAnAttribute:
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return 0.0
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#if swift(>=5.0)
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@unknown default:
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return 0.0
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#endif
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}
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#endif
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}
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if let value = self as? ConstraintInsets {
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#if os(iOS) || os(tvOS)
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switch layoutAttribute {
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case .left, .leftMargin:
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return value.left
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case .top, .topMargin, .firstBaseline:
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return value.top
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case .right, .rightMargin:
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return -value.right
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case .bottom, .bottomMargin, .lastBaseline:
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return -value.bottom
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case .leading, .leadingMargin:
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return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? value.left : value.right
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case .trailing, .trailingMargin:
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return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? -value.right : -value.left
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case .centerX, .centerXWithinMargins:
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return (value.left - value.right) / 2
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case .centerY, .centerYWithinMargins:
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return (value.top - value.bottom) / 2
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case .width:
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return -(value.left + value.right)
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case .height:
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return -(value.top + value.bottom)
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case .notAnAttribute:
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return 0.0
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#if swift(>=5.0)
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@unknown default:
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return 0.0
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#endif
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}
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#else
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switch layoutAttribute {
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case .left:
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return value.left
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case .top, .firstBaseline:
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return value.top
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case .right:
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return -value.right
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case .bottom, .lastBaseline:
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return -value.bottom
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case .leading:
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return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? value.left : value.right
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case .trailing:
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return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? -value.right : -value.left
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case .centerX:
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return (value.left - value.right) / 2
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case .centerY:
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return (value.top - value.bottom) / 2
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case .width:
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return -(value.left + value.right)
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case .height:
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return -(value.top + value.bottom)
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case .notAnAttribute:
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return 0.0
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#if swift(>=5.0)
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@unknown default:
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return 0.0
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#endif
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}
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#endif
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}
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#if os(iOS) || os(tvOS)
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if #available(iOS 11.0, tvOS 11.0, *), let value = self as? ConstraintDirectionalInsets {
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switch layoutAttribute {
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case .left, .leftMargin:
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return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? value.leading : value.trailing
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case .top, .topMargin, .firstBaseline:
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return value.top
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case .right, .rightMargin:
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return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? -value.trailing : -value.leading
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case .bottom, .bottomMargin, .lastBaseline:
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return -value.bottom
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case .leading, .leadingMargin:
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return value.leading
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case .trailing, .trailingMargin:
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return -value.trailing
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case .centerX, .centerXWithinMargins:
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return (value.leading - value.trailing) / 2
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case .centerY, .centerYWithinMargins:
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return (value.top - value.bottom) / 2
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case .width:
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return -(value.leading + value.trailing)
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case .height:
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return -(value.top + value.bottom)
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case .notAnAttribute:
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return 0.0
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#if swift(>=5.0)
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@unknown default:
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return 0.0
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#else
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default:
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return 0.0
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#endif
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}
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}
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#endif
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return 0.0
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}
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}
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