library /*isNonNullableByDefault*/;
import self as self;
import "dart:core" as core;

class DeltaBlue extends core::Object {
  synthetic constructor •() → self::DeltaBlue
    : super core::Object::•()
    ;
  method run() → void {
    self::chainTest(100);
    self::projectionTest(100);
  }
}
class Strength extends core::Object /*hasConstConstructor*/  {
  final field core::int value;
  final field core::String name;
  const constructor •(core::int value, core::String name) → self::Strength
    : self::Strength::value = value, self::Strength::name = name, super core::Object::•()
    ;
  method nextWeaker() → self::Strength
    return #C19.{core::List::[]}(this.{self::Strength::value}{core::int}){(core::int) → self::Strength};
  static method stronger(self::Strength s1, self::Strength s2) → core::bool {
    return s1.{self::Strength::value}{core::int}.{core::num::<}(s2.{self::Strength::value}{core::int}){(core::num) → core::bool};
  }
  static method weaker(self::Strength s1, self::Strength s2) → core::bool {
    return s1.{self::Strength::value}{core::int}.{core::num::>}(s2.{self::Strength::value}{core::int}){(core::num) → core::bool};
  }
  static method weakest(self::Strength s1, self::Strength s2) → self::Strength {
    return self::Strength::weaker(s1, s2) ?{self::Strength} s1 : s2;
  }
  static method strongest(self::Strength s1, self::Strength s2) → self::Strength {
    return self::Strength::stronger(s1, s2) ?{self::Strength} s1 : s2;
  }
}
abstract class Constraint extends core::Object /*hasConstConstructor*/  {
  final field self::Strength strength;
  const constructor •(self::Strength strength) → self::Constraint
    : self::Constraint::strength = strength, super core::Object::•()
    ;
  abstract method isSatisfied() → core::bool;
  abstract method markUnsatisfied() → void;
  abstract method addToGraph() → void;
  abstract method removeFromGraph() → void;
  abstract method chooseMethod(core::int mark) → void;
  abstract method markInputs(core::int mark) → void;
  abstract method inputsKnown(core::int mark) → core::bool;
  abstract method output() → self::Variable;
  abstract method execute() → void;
  abstract method recalculate() → void;
  method addConstraint() → void {
    this.{self::Constraint::addToGraph}(){() → void};
    self::planner.{self::Planner::incrementalAdd}(this){(self::Constraint) → void};
  }
  method satisfy(dynamic mark) → self::Constraint? {
    this.{self::Constraint::chooseMethod}(mark as{TypeError,ForDynamic,ForNonNullableByDefault} core::int){(core::int) → void};
    if(!this.{self::Constraint::isSatisfied}(){() → core::bool}) {
      if(this.{self::Constraint::strength}{self::Strength} =={core::Object::==}{(core::Object) → core::bool} #C22) {
        core::print("Could not satisfy a required constraint!");
      }
      return null;
    }
    this.{self::Constraint::markInputs}(mark as{TypeError,ForDynamic,ForNonNullableByDefault} core::int){(core::int) → void};
    self::Variable out = this.{self::Constraint::output}(){() → self::Variable};
    self::Constraint? overridden = out.{self::Variable::determinedBy}{self::Constraint?};
    if(!(overridden == null))
      overridden{self::Constraint}.{self::Constraint::markUnsatisfied}(){() → void};
    out.{self::Variable::determinedBy} = this;
    if(!self::planner.{self::Planner::addPropagate}(this, mark as{TypeError,ForDynamic,ForNonNullableByDefault} core::int){(self::Constraint, core::int) → core::bool})
      core::print("Cycle encountered");
    out.{self::Variable::mark} = mark as{TypeError,ForDynamic,ForNonNullableByDefault} core::int;
    return overridden;
  }
  method destroyConstraint() → void {
    if(this.{self::Constraint::isSatisfied}(){() → core::bool})
      self::planner.{self::Planner::incrementalRemove}(this){(self::Constraint) → void};
    this.{self::Constraint::removeFromGraph}(){() → void};
  }
  method isInput() → core::bool
    return false;
}
abstract class UnaryConstraint extends self::Constraint {
  final field self::Variable myOutput;
  field core::bool satisfied = false;
  constructor •(self::Variable myOutput, self::Strength strength) → self::UnaryConstraint
    : self::UnaryConstraint::myOutput = myOutput, super self::Constraint::•(strength) {
    this.{self::Constraint::addConstraint}(){() → void};
  }
  method addToGraph() → void {
    this.{self::UnaryConstraint::myOutput}{self::Variable}.{self::Variable::addConstraint}(this){(self::Constraint) → void};
    this.{self::UnaryConstraint::satisfied} = false;
  }
  method chooseMethod(core::int mark) → void {
    this.{self::UnaryConstraint::satisfied} = !(this.{self::UnaryConstraint::myOutput}{self::Variable}.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark) && self::Strength::stronger(this.{self::Constraint::strength}{self::Strength}, this.{self::UnaryConstraint::myOutput}{self::Variable}.{self::Variable::walkStrength}{self::Strength});
  }
  method isSatisfied() → core::bool
    return this.{self::UnaryConstraint::satisfied}{core::bool};
  method markInputs(core::int mark) → void {}
  method output() → self::Variable
    return this.{self::UnaryConstraint::myOutput}{self::Variable};
  method recalculate() → void {
    this.{self::UnaryConstraint::myOutput}{self::Variable}.{self::Variable::walkStrength} = this.{self::Constraint::strength}{self::Strength};
    this.{self::UnaryConstraint::myOutput}{self::Variable}.{self::Variable::stay} = !this.{self::Constraint::isInput}(){() → core::bool};
    if(this.{self::UnaryConstraint::myOutput}{self::Variable}.{self::Variable::stay}{core::bool})
      this.{self::Constraint::execute}(){() → void};
  }
  method markUnsatisfied() → void {
    this.{self::UnaryConstraint::satisfied} = false;
  }
  method inputsKnown(core::int mark) → core::bool
    return true;
  method removeFromGraph() → void {
    if(!(this.{self::UnaryConstraint::myOutput}{self::Variable} == null))
      this.{self::UnaryConstraint::myOutput}{self::Variable}.{self::Variable::removeConstraint}(this){(self::Constraint) → void};
    this.{self::UnaryConstraint::satisfied} = false;
  }
}
class StayConstraint extends self::UnaryConstraint {
  constructor •(self::Variable v, self::Strength str) → self::StayConstraint
    : super self::UnaryConstraint::•(v, str)
    ;
  method execute() → void {}
}
class EditConstraint extends self::UnaryConstraint {
  constructor •(self::Variable v, self::Strength str) → self::EditConstraint
    : super self::UnaryConstraint::•(v, str)
    ;
  method isInput() → core::bool
    return true;
  method execute() → void {}
}
abstract class BinaryConstraint extends self::Constraint {
  field self::Variable v1;
  field self::Variable v2;
  field core::int direction = #C1;
  constructor •(self::Variable v1, self::Variable v2, self::Strength strength) → self::BinaryConstraint
    : self::BinaryConstraint::v1 = v1, self::BinaryConstraint::v2 = v2, super self::Constraint::•(strength) {
    this.{self::Constraint::addConstraint}(){() → void};
  }
  method chooseMethod(core::int mark) → void {
    if(this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark) {
      this.{self::BinaryConstraint::direction} = !(this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark) && self::Strength::stronger(this.{self::Constraint::strength}{self::Strength}, this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::walkStrength}{self::Strength}) ?{core::int} #C4 : #C1;
    }
    if(this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark) {
      this.{self::BinaryConstraint::direction} = !(this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark) && self::Strength::stronger(this.{self::Constraint::strength}{self::Strength}, this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::walkStrength}{self::Strength}) ?{core::int} #C20 : #C1;
    }
    if(self::Strength::weaker(this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::walkStrength}{self::Strength}, this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::walkStrength}{self::Strength})) {
      this.{self::BinaryConstraint::direction} = self::Strength::stronger(this.{self::Constraint::strength}{self::Strength}, this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::walkStrength}{self::Strength}) ?{core::int} #C20 : #C1;
    }
    else {
      this.{self::BinaryConstraint::direction} = self::Strength::stronger(this.{self::Constraint::strength}{self::Strength}, this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::walkStrength}{self::Strength}) ?{core::int} #C4 : #C20;
    }
  }
  method addToGraph() → void {
    this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::addConstraint}(this){(self::Constraint) → void};
    this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::addConstraint}(this){(self::Constraint) → void};
    this.{self::BinaryConstraint::direction} = #C1;
  }
  method isSatisfied() → core::bool
    return !(this.{self::BinaryConstraint::direction}{core::int} =={core::num::==}{(core::Object) → core::bool} #C1);
  method markInputs(core::int mark) → void {
    this.{self::BinaryConstraint::input}(){() → self::Variable}.{self::Variable::mark} = mark;
  }
  method input() → self::Variable
    return this.{self::BinaryConstraint::direction}{core::int} =={core::num::==}{(core::Object) → core::bool} #C4 ?{self::Variable} this.{self::BinaryConstraint::v1}{self::Variable} : this.{self::BinaryConstraint::v2}{self::Variable};
  method output() → self::Variable
    return this.{self::BinaryConstraint::direction}{core::int} =={core::num::==}{(core::Object) → core::bool} #C4 ?{self::Variable} this.{self::BinaryConstraint::v2}{self::Variable} : this.{self::BinaryConstraint::v1}{self::Variable};
  method recalculate() → void {
    self::Variable ihn = this.{self::BinaryConstraint::input}(){() → self::Variable};
    self::Variable out = this.{self::BinaryConstraint::output}(){() → self::Variable};
    out.{self::Variable::walkStrength} = self::Strength::weakest(this.{self::Constraint::strength}{self::Strength}, ihn.{self::Variable::walkStrength}{self::Strength});
    out.{self::Variable::stay} = ihn.{self::Variable::stay}{core::bool};
    if(out.{self::Variable::stay}{core::bool})
      this.{self::Constraint::execute}(){() → void};
  }
  method markUnsatisfied() → void {
    this.{self::BinaryConstraint::direction} = #C1;
  }
  method inputsKnown(core::int mark) → core::bool {
    self::Variable i = this.{self::BinaryConstraint::input}(){() → self::Variable};
    return i.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark || i.{self::Variable::stay}{core::bool} || i.{self::Variable::determinedBy}{self::Constraint?} == null;
  }
  method removeFromGraph() → void {
    if(!(this.{self::BinaryConstraint::v1}{self::Variable} == null))
      this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::removeConstraint}(this){(self::Constraint) → void};
    if(!(this.{self::BinaryConstraint::v2}{self::Variable} == null))
      this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::removeConstraint}(this){(self::Constraint) → void};
    this.{self::BinaryConstraint::direction} = #C1;
  }
}
class ScaleConstraint extends self::BinaryConstraint {
  final field self::Variable scale;
  final field self::Variable offset;
  constructor •(self::Variable src, self::Variable scale, self::Variable offset, self::Variable dest, self::Strength strength) → self::ScaleConstraint
    : self::ScaleConstraint::scale = scale, self::ScaleConstraint::offset = offset, super self::BinaryConstraint::•(src, dest, strength)
    ;
  method addToGraph() → void {
    super.{self::BinaryConstraint::addToGraph}();
    this.{self::ScaleConstraint::scale}{self::Variable}.{self::Variable::addConstraint}(this){(self::Constraint) → void};
    this.{self::ScaleConstraint::offset}{self::Variable}.{self::Variable::addConstraint}(this){(self::Constraint) → void};
  }
  method removeFromGraph() → void {
    super.{self::BinaryConstraint::removeFromGraph}();
    if(!(this.{self::ScaleConstraint::scale}{self::Variable} == null))
      this.{self::ScaleConstraint::scale}{self::Variable}.{self::Variable::removeConstraint}(this){(self::Constraint) → void};
    if(!(this.{self::ScaleConstraint::offset}{self::Variable} == null))
      this.{self::ScaleConstraint::offset}{self::Variable}.{self::Variable::removeConstraint}(this){(self::Constraint) → void};
  }
  method markInputs(core::int mark) → void {
    super.{self::BinaryConstraint::markInputs}(mark);
    this.{self::ScaleConstraint::scale}{self::Variable}.{self::Variable::mark} = this.{self::ScaleConstraint::offset}{self::Variable}.{self::Variable::mark} = mark;
  }
  method execute() → void {
    if(this.{self::BinaryConstraint::direction}{core::int} =={core::num::==}{(core::Object) → core::bool} #C4) {
      this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::value} = this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::value}{core::int}.{core::num::*}(this.{self::ScaleConstraint::scale}{self::Variable}.{self::Variable::value}{core::int}){(core::num) → core::int}.{core::num::+}(this.{self::ScaleConstraint::offset}{self::Variable}.{self::Variable::value}{core::int}){(core::num) → core::int};
    }
    else {
      this.{self::BinaryConstraint::v1}{self::Variable}.{self::Variable::value} = this.{self::BinaryConstraint::v2}{self::Variable}.{self::Variable::value}{core::int}.{core::num::-}(this.{self::ScaleConstraint::offset}{self::Variable}.{self::Variable::value}{core::int}){(core::num) → core::int}.{core::num::~/}(this.{self::ScaleConstraint::scale}{self::Variable}.{self::Variable::value}{core::int}){(core::num) → core::int};
    }
  }
  method recalculate() → void {
    self::Variable ihn = this.{self::BinaryConstraint::input}(){() → self::Variable};
    self::Variable out = this.{self::BinaryConstraint::output}(){() → self::Variable};
    out.{self::Variable::walkStrength} = self::Strength::weakest(this.{self::Constraint::strength}{self::Strength}, ihn.{self::Variable::walkStrength}{self::Strength});
    out.{self::Variable::stay} = ihn.{self::Variable::stay}{core::bool} && this.{self::ScaleConstraint::scale}{self::Variable}.{self::Variable::stay}{core::bool} && this.{self::ScaleConstraint::offset}{self::Variable}.{self::Variable::stay}{core::bool};
    if(out.{self::Variable::stay}{core::bool})
      this.{self::ScaleConstraint::execute}(){() → void};
  }
}
class EqualityConstraint extends self::BinaryConstraint {
  constructor •(self::Variable v1, self::Variable v2, self::Strength strength) → self::EqualityConstraint
    : super self::BinaryConstraint::•(v1, v2, strength)
    ;
  method execute() → void {
    this.{self::BinaryConstraint::output}(){() → self::Variable}.{self::Variable::value} = this.{self::BinaryConstraint::input}(){() → self::Variable}.{self::Variable::value}{core::int};
  }
}
class Variable extends core::Object {
  field core::List<self::Constraint> constraints = <self::Constraint>[];
  field self::Constraint? determinedBy = null;
  field core::int mark = 0;
  field self::Strength walkStrength = #C18;
  field core::bool stay = true;
  field core::int value;
  final field core::String name;
  constructor •(core::String name, core::int value) → self::Variable
    : self::Variable::name = name, self::Variable::value = value, super core::Object::•()
    ;
  method addConstraint(self::Constraint c) → void {
    this.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::add}(c){(self::Constraint) → void};
  }
  method removeConstraint(self::Constraint c) → void {
    this.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::remove}(c){(core::Object?) → core::bool};
    if(this.{self::Variable::determinedBy}{self::Constraint?} =={core::Object::==}{(core::Object) → core::bool} c)
      this.{self::Variable::determinedBy} = null;
  }
}
class Planner extends core::Object {
  field core::int currentMark = 0;
  synthetic constructor •() → self::Planner
    : super core::Object::•()
    ;
  method incrementalAdd(self::Constraint c) → void {
    core::int mark = this.{self::Planner::newMark}(){() → core::int};
    for (self::Constraint? overridden = c.{self::Constraint::satisfy}(mark){(dynamic) → self::Constraint?}; !(overridden == null); overridden = overridden{self::Constraint}.{self::Constraint::satisfy}(mark){(dynamic) → self::Constraint?})
      ;
  }
  method incrementalRemove(self::Constraint c) → void {
    self::Variable out = c.{self::Constraint::output}(){() → self::Variable};
    c.{self::Constraint::markUnsatisfied}(){() → void};
    c.{self::Constraint::removeFromGraph}(){() → void};
    core::List<self::Constraint> unsatisfied = this.{self::Planner::removePropagateFrom}(out){(self::Variable) → core::List<self::Constraint>};
    self::Strength strength = #C22;
    do {
      for (core::int i = 0; i.{core::num::<}(unsatisfied.{core::List::length}{core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
        self::Constraint u = unsatisfied.{core::List::[]}(i){(core::int) → self::Constraint};
        if(u.{self::Constraint::strength}{self::Strength} =={core::Object::==}{(core::Object) → core::bool} strength)
          this.{self::Planner::incrementalAdd}(u){(self::Constraint) → void};
      }
      strength = strength.{self::Strength::nextWeaker}(){() → self::Strength};
    }
    while (!(strength =={core::Object::==}{(core::Object) → core::bool} #C18))
  }
  method newMark() → core::int
    return this.{self::Planner::currentMark} = this.{self::Planner::currentMark}{core::int}.{core::num::+}(1){(core::num) → core::int};
  method makePlan(core::List<self::Constraint> sources) → self::Plan {
    core::int mark = this.{self::Planner::newMark}(){() → core::int};
    self::Plan plan = new self::Plan::•();
    core::List<self::Constraint> todo = sources;
    while (todo.{core::List::length}{core::int}.{core::num::>}(0){(core::num) → core::bool}) {
      self::Constraint c = todo.{core::List::removeLast}(){() → self::Constraint};
      if(!(c.{self::Constraint::output}(){() → self::Variable}.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark) && c.{self::Constraint::inputsKnown}(mark){(core::int) → core::bool}) {
        plan.{self::Plan::addConstraint}(c){(self::Constraint) → void};
        c.{self::Constraint::output}(){() → self::Variable}.{self::Variable::mark} = mark;
        this.{self::Planner::addConstraintsConsumingTo}(c.{self::Constraint::output}(){() → self::Variable}, todo){(self::Variable, core::List<self::Constraint>) → void};
      }
    }
    return plan;
  }
  method extractPlanFromConstraints(core::List<self::Constraint> constraints) → self::Plan {
    core::List<self::Constraint> sources = <self::Constraint>[];
    for (core::int i = 0; i.{core::num::<}(constraints.{core::List::length}{core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
      self::Constraint c = constraints.{core::List::[]}(i){(core::int) → self::Constraint};
      if(c.{self::Constraint::isInput}(){() → core::bool} && c.{self::Constraint::isSatisfied}(){() → core::bool})
        sources.{core::List::add}(c){(self::Constraint) → void};
    }
    return this.{self::Planner::makePlan}(sources){(core::List<self::Constraint>) → self::Plan};
  }
  method addPropagate(self::Constraint c, core::int mark) → core::bool {
    core::List<self::Constraint> todo = <self::Constraint>[c];
    while (todo.{core::List::length}{core::int}.{core::num::>}(0){(core::num) → core::bool}) {
      self::Constraint d = todo.{core::List::removeLast}(){() → self::Constraint};
      if(d.{self::Constraint::output}(){() → self::Variable}.{self::Variable::mark}{core::int} =={core::num::==}{(core::Object) → core::bool} mark) {
        this.{self::Planner::incrementalRemove}(c){(self::Constraint) → void};
        return false;
      }
      d.{self::Constraint::recalculate}(){() → void};
      this.{self::Planner::addConstraintsConsumingTo}(d.{self::Constraint::output}(){() → self::Variable}, todo){(self::Variable, core::List<self::Constraint>) → void};
    }
    return true;
  }
  method removePropagateFrom(self::Variable out) → core::List<self::Constraint> {
    out.{self::Variable::determinedBy} = null;
    out.{self::Variable::walkStrength} = #C18;
    out.{self::Variable::stay} = true;
    core::List<self::Constraint> unsatisfied = <self::Constraint>[];
    core::List<self::Variable> todo = <self::Variable>[out];
    while (todo.{core::List::length}{core::int}.{core::num::>}(0){(core::num) → core::bool}) {
      self::Variable v = todo.{core::List::removeLast}(){() → self::Variable};
      for (core::int i = 0; i.{core::num::<}(v.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::length}{core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
        self::Constraint c = v.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::[]}(i){(core::int) → self::Constraint};
        if(!c.{self::Constraint::isSatisfied}(){() → core::bool})
          unsatisfied.{core::List::add}(c){(self::Constraint) → void};
      }
      self::Constraint? determining = v.{self::Variable::determinedBy}{self::Constraint?};
      for (core::int i = 0; i.{core::num::<}(v.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::length}{core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
        self::Constraint next = v.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::[]}(i){(core::int) → self::Constraint};
        if(!(next =={core::Object::==}{(core::Object) → core::bool} determining) && next.{self::Constraint::isSatisfied}(){() → core::bool}) {
          next.{self::Constraint::recalculate}(){() → void};
          todo.{core::List::add}(next.{self::Constraint::output}(){() → self::Variable}){(self::Variable) → void};
        }
      }
    }
    return unsatisfied;
  }
  method addConstraintsConsumingTo(self::Variable v, core::List<self::Constraint> coll) → void {
    self::Constraint? determining = v.{self::Variable::determinedBy}{self::Constraint?};
    for (core::int i = 0; i.{core::num::<}(v.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::length}{core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
      self::Constraint c = v.{self::Variable::constraints}{core::List<self::Constraint>}.{core::List::[]}(i){(core::int) → self::Constraint};
      if(!(c =={core::Object::==}{(core::Object) → core::bool} determining) && c.{self::Constraint::isSatisfied}(){() → core::bool})
        coll.{core::List::add}(c){(self::Constraint) → void};
    }
  }
}
class Plan extends core::Object {
  field core::List<self::Constraint> list = <self::Constraint>[];
  synthetic constructor •() → self::Plan
    : super core::Object::•()
    ;
  method addConstraint(self::Constraint c) → void {
    this.{self::Plan::list}{core::List<self::Constraint>}.{core::List::add}(c){(self::Constraint) → void};
  }
  method size() → core::int
    return this.{self::Plan::list}{core::List<self::Constraint>}.{core::List::length}{core::int};
  method execute() → void {
    for (core::int i = 0; i.{core::num::<}(this.{self::Plan::list}{core::List<self::Constraint>}.{core::List::length}{core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
      this.{self::Plan::list}{core::List<self::Constraint>}.{core::List::[]}(i){(core::int) → self::Constraint}.{self::Constraint::execute}(){() → void};
    }
  }
}
static const field self::Strength REQUIRED = #C22;
static const field self::Strength STRONG_PREFERRED = #C3;
static const field self::Strength PREFERRED = #C6;
static const field self::Strength STRONG_DEFAULT = #C9;
static const field self::Strength NORMAL = #C12;
static const field self::Strength WEAK_DEFAULT = #C15;
static const field self::Strength WEAKEST = #C18;
static const field core::int NONE = #C1;
static const field core::int FORWARD = #C4;
static const field core::int BACKWARD = #C20;
late static field self::Planner planner;
static method main() → dynamic {
  new self::DeltaBlue::•().{self::DeltaBlue::run}(){() → void};
}
static method chainTest(core::int n) → void {
  self::planner = new self::Planner::•();
  has-declared-initializer self::Variable? prev = null;
  has-declared-initializer self::Variable? first = null;
  has-declared-initializer self::Variable? last = null;
  for (core::int i = 0; i.{core::num::<=}(n){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
    self::Variable v = new self::Variable::•("v${i}", 0);
    if(!(prev == null))
      new self::EqualityConstraint::•(prev{self::Variable}, v, #C22);
    if(i =={core::num::==}{(core::Object) → core::bool} 0)
      first = v;
    if(i =={core::num::==}{(core::Object) → core::bool} n)
      last = v;
    prev = v;
  }
  new self::StayConstraint::•(last!, #C9);
  self::EditConstraint edit = new self::EditConstraint::•(first!, #C6);
  self::Plan plan = self::planner.{self::Planner::extractPlanFromConstraints}(<self::Constraint>[edit]){(core::List<self::Constraint>) → self::Plan};
  for (core::int i = 0; i.{core::num::<}(100){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
    first{self::Variable}.{self::Variable::value} = i;
    plan.{self::Plan::execute}(){() → void};
    if(!(last{self::Variable}.{self::Variable::value}{core::int} =={core::num::==}{(core::Object) → core::bool} i)) {
      core::print("Chain test failed:");
      core::print("Expected last value to be ${i} but it was ${last{self::Variable}.{self::Variable::value}{core::int}}.");
    }
  }
}
static method projectionTest(core::int n) → void {
  self::planner = new self::Planner::•();
  self::Variable scale = new self::Variable::•("scale", 10);
  self::Variable offset = new self::Variable::•("offset", 1000);
  has-declared-initializer self::Variable? src = null;
  has-declared-initializer self::Variable? dst = null;
  core::List<self::Variable> dests = <self::Variable>[];
  for (core::int i = 0; i.{core::num::<}(n){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
    src = new self::Variable::•("src", i);
    dst = new self::Variable::•("dst", i);
    dests.{core::List::add}(dst{self::Variable}){(self::Variable) → void};
    new self::StayConstraint::•(src{self::Variable}, #C12);
    new self::ScaleConstraint::•(src{self::Variable}, scale, offset, dst{self::Variable}, #C22);
  }
  self::change(src!, 17);
  if(!(dst!.{self::Variable::value}{core::int} =={core::num::==}{(core::Object) → core::bool} 1170))
    core::print("Projection 1 failed");
  self::change(dst{self::Variable}, 1050);
  if(!(src{self::Variable}.{self::Variable::value}{core::int} =={core::num::==}{(core::Object) → core::bool} 5))
    core::print("Projection 2 failed");
  self::change(scale, 5);
  for (core::int i = 0; i.{core::num::<}(n.{core::num::-}(1){(core::num) → core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
    if(!(dests.{core::List::[]}(i){(core::int) → self::Variable}.{self::Variable::value}{core::int} =={core::num::==}{(core::Object) → core::bool} i.{core::num::*}(5){(core::num) → core::int}.{core::num::+}(1000){(core::num) → core::int}))
      core::print("Projection 3 failed");
  }
  self::change(offset, 2000);
  for (core::int i = 0; i.{core::num::<}(n.{core::num::-}(1){(core::num) → core::int}){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
    if(!(dests.{core::List::[]}(i){(core::int) → self::Variable}.{self::Variable::value}{core::int} =={core::num::==}{(core::Object) → core::bool} i.{core::num::*}(5){(core::num) → core::int}.{core::num::+}(2000){(core::num) → core::int}))
      core::print("Projection 4 failed");
  }
}
static method change(self::Variable v, core::int newValue) → void {
  self::EditConstraint edit = new self::EditConstraint::•(v, #C6);
  self::Plan plan = self::planner.{self::Planner::extractPlanFromConstraints}(<self::EditConstraint>[edit]){(core::List<self::Constraint>) → self::Plan};
  for (core::int i = 0; i.{core::num::<}(10){(core::num) → core::bool}; i = i.{core::num::+}(1){(core::num) → core::int}) {
    v.{self::Variable::value} = newValue;
    plan.{self::Plan::execute}(){() → void};
  }
  edit.{self::Constraint::destroyConstraint}(){() → void};
}

constants  {
  #C1 = 1
  #C2 = "strongPreferred"
  #C3 = self::Strength {value:#C1, name:#C2}
  #C4 = 2
  #C5 = "preferred"
  #C6 = self::Strength {value:#C4, name:#C5}
  #C7 = 3
  #C8 = "strongDefault"
  #C9 = self::Strength {value:#C7, name:#C8}
  #C10 = 4
  #C11 = "normal"
  #C12 = self::Strength {value:#C10, name:#C11}
  #C13 = 5
  #C14 = "weakDefault"
  #C15 = self::Strength {value:#C13, name:#C14}
  #C16 = 6
  #C17 = "weakest"
  #C18 = self::Strength {value:#C16, name:#C17}
  #C19 = <self::Strength*>[#C3, #C6, #C9, #C12, #C15, #C18]
  #C20 = 0
  #C21 = "required"
  #C22 = self::Strength {value:#C20, name:#C21}
}


Constructor coverage from constants:
org-dartlang-testcase:///DeltaBlue.dart:
- Strength. (from org-dartlang-testcase:///DeltaBlue.dart:59:9)
- Object. (from org-dartlang-sdk:///sdk/lib/core/object.dart)