/// <summary>
/// Visits a <see cref="ConstantExpression" />.
/// </summary>
/// <param name="constantExpression">The constant expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void Constant(
ConstantExpression constantExpression,
RewritingParameters rewritingParameters,
Reference <Expression> currentResult)
{
currentResult.Value = rewritingParameters.FlatRepresentationConsumer.GetResultingExpression(constantExpression);
}
/// <summary>
/// Visits a <see cref="VariableExpression" />.
/// </summary>
/// <param name="variableExpression">The variable expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void Variable(
VariableExpression variableExpression,
RewritingParameters rewritingParameters,
Reference <Expression> currentResult)
{
currentResult.Value = rewritingParameters.FlatRepresentationConsumer.GetResultingExpression(variableExpression);
}
/// <summary>
/// Units the specified unit expression.
/// </summary>
/// <param name="unitExpression">The unit expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void Unit(
UnitExpression unitExpression,
RewritingParameters rewritingParameters,
Reference <Expression> currentResult)
{
currentResult.Value = rewritingParameters.FlatRepresentationConsumer.GetResultingExpression(unitExpression, rewritingParameters.ReduceByBaseUnit);
}
/// <summary>
/// Visits a <see cref="MagnitudeExpression" />.
/// </summary>
/// <param name="magnitudeExpression">The magnitude expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void Magnitude(
MagnitudeExpression magnitudeExpression,
RewritingParameters rewritingParameters,
Reference <Expression> currentResult)
{
magnitudeExpression.Lhs.Visit(this, rewritingParameters, currentResult);
}
/// <summary>
/// Visits a <see cref="ParenthesisExpression" />.
/// </summary>
/// <param name="parenthesisExpression">The parentheses expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void Parenthesis(
ParenthesisExpression parenthesisExpression,
RewritingParameters rewritingParameters,
Reference <Expression> currentResult)
{
parenthesisExpression.Expression.Visit(this, rewritingParameters, currentResult);
if (ReferenceEquals(parenthesisExpression.Expression, currentResult.Value))
{
currentResult.Value = parenthesisExpression;
}
else
{
currentResult.Value = new ParenthesisExpression(currentResult.Value);
}
}
/// <summary>
/// Visits a <see cref="DivisionExpression" />.
/// </summary>
/// <param name="divisionExpression">The division expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void Divide(
DivisionExpression divisionExpression,
RewritingParameters rewritingParameters,
Reference <Expression> currentResult)
{
divisionExpression.Lhs.Visit(this, rewritingParameters, currentResult);
var lhs = currentResult.Value;
divisionExpression.Rhs.Visit(this, rewritingParameters, currentResult);
var rhs = currentResult.Value;
currentResult.Value = this.SelectCurrentExpression(
divisionExpression,
lhs,
rhs,
(newLhs, newRhs) => new DivisionExpression(newLhs, newRhs));
}
/// <summary>
/// Visits a <see cref="MultiplicationExpression" />.
/// </summary>
/// <param name="multiplicationExpression">The multiplication expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void Multiply(
MultiplicationExpression multiplicationExpression,
RewritingParameters rewritingParameters,
Reference <Expression> currentResult)
{
multiplicationExpression.Lhs.Visit(this, rewritingParameters, currentResult);
var lhs = currentResult.Value;
multiplicationExpression.Rhs.Visit(this, rewritingParameters, currentResult);
var rhs = currentResult.Value;
currentResult.Value = this.SelectCurrentExpression(
multiplicationExpression,
lhs,
rhs,
(newLhs, newRhs) => new MultiplicationExpression(newLhs, newRhs));
}
/// <summary>
/// Visits the specified expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
/// <returns>
/// The rewritten <see cref="Expression" />.
/// </returns>
public Expression Visit(
Expression expression,
RewritingParameters rewritingParameters = null,
Reference <Expression> currentResult = null)
{
rewritingParameters = rewritingParameters ??
new RewritingParameters(false, new FlatRepresentationConsumer(new Dictionary <string, IFlatIdentifierRepresentation>()));
currentResult = currentResult ?? new Reference <Expression>(expression);
expression.Visit(this, rewritingParameters, currentResult);
var result = currentResult.Value;
if (result == null)
{
return(ConstantExpression.One);
}
return(result);
}
/// <summary>
/// Visits the unknown.
/// </summary>
/// <param name="expresstion">The expresstion.</param>
/// <param name="rewritingParameters">The rewriting parameters.</param>
/// <param name="currentResult">The current result.</param>
public void VisitUnknown(Expression expresstion, RewritingParameters rewritingParameters = null, Reference <Expression> currentResult = null)
{
throw VisitException.Create(expresstion, rewritingParameters, currentResult);
}