public static Expression TernaryAssign <T>(this ExpressionContainer <T> target, ExpressionContainer <bool> condition, ExpressionContainer <T> ifTrue, ExpressionContainer <T> ifFalse)
{
return(Expression.IfThenElse(
condition.Expression,
Expression.Assign(target, ifTrue),
Expression.Assign(target, ifFalse)));
}
/// <summary>
/// Adds parameter to <see cref="BlockExpression"/>
/// </summary>
public BlockBuilder Parameter <T>(out ExpressionContainer <T> parameter, T value)
{
var expression = Expression.Parameter(typeof(T));
parameter = ExpressionShortcuts.Arg <T>(expression);
return(Parameter(parameter, ExpressionShortcuts.Arg(value)));
}
/// <summary>
/// Adds parameter to <see cref="BlockExpression"/>
/// </summary>
public BlockBuilder Parameter <T>(string name, out ExpressionContainer <T> parameter, ExpressionContainer <T> value)
{
var expression = Expression.Parameter(typeof(T), name);
parameter = ExpressionShortcuts.Arg <T>(expression);
return(Parameter(parameter, value));
}
/// <summary>
/// Created <see langword="return"/> statement
/// </summary>
/// <param name="instance"></param>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static IEnumerable <Expression> Return <T>(this ExpressionContainer <T> instance)
{
var returnTarget = Expression.Label(typeof(T));
var returnExpression = Expression.Return(returnTarget, instance, typeof(T));
var returnLabel = Expression.Label(returnTarget, Null <T>());
return(new Expression[] { returnExpression, returnLabel });
}
/// <summary>
/// Creates new <see langword="case"/> expression for values specified in <paramref name="testValues"/>
/// </summary>
/// <param name="expression"></param>
/// <param name="testValues"></param>
/// <typeparam name="TR"></typeparam>
/// <returns></returns>
public SwitchBuilder <T, TR> Case <TR>(ExpressionContainer <TR> expression, params ExpressionContainer <T>[] testValues)
{
var switchBuilder = new SwitchBuilder <T, TR>(Value)
{
Cases = Cases,
ComparerMethod = ComparerMethod,
DefaultCase = DefaultCase
};
return(switchBuilder.Case(expression, testValues));
}
/// <summary>
/// Adds parameter to <see cref="BlockExpression"/> with initial assignment
/// </summary>
/// <exception cref="ArgumentException"><paramref name="expression"/> is not <see cref="ParameterExpression"/></exception>
public BlockBuilder Parameter <TV>(ExpressionContainer <TV> expression, Expression value)
{
if (!(expression.Expression is ParameterExpression parameterExpression))
{
throw new ArgumentException("is not ParameterExpression", nameof(expression));
}
_parameters.Add(parameterExpression);
_expressions.Add(expression.Assign(value));
return(this);
}
/// <summary>
/// Creates <see langword="default"/> case
/// </summary>
/// <param name="expression"></param>
/// <typeparam name="TR"></typeparam>
/// <returns></returns>
public SwitchBuilder <T, TR> Default <TR>(ExpressionContainer <TR> expression)
{
var switchBuilder = new SwitchBuilder <T, TR>(Value)
{
Cases = Cases,
ComparerMethod = ComparerMethod,
DefaultCase = DefaultCase
};
return(switchBuilder.Default(expression));
}
public static ExpressionContainer <TV> Member <T, TV>(this ExpressionContainer <T> instance, Expression <Func <T, TV> > propertyAccessor)
{
return(Member(instance.Expression, propertyAccessor));
}
public static SwitchBuilder <T> Switch <T>(ExpressionContainer <T> value)
{
return(new SwitchBuilder <T>(value));
}
/// <summary>
/// Occurs in case <see cref="If(System.Linq.Expressions.Expression)"/> condition evaluated to <c>true</c>
/// </summary>
/// <param name="then"></param>
/// <returns></returns>
public ConditionBuilder Then <T>(ExpressionContainer <T> then)
{
_then = then.Expression;
return(this);
}
/// <summary>
/// Adds <see langword="if"/> block
/// </summary>
/// <param name="condition"></param>
/// <returns></returns>
public ConditionBuilder If(ExpressionContainer <bool> condition)
{
_condition = condition;
return(this);
}
/// <summary>
/// Adds <see langword="else"/> block
/// </summary>
/// <param name="then"></param>
/// <returns></returns>
public ConditionBuilder Else <T>(ExpressionContainer <T> then)
{
_else = then;
return(this);
}
public static ExpressionContainer Code <T>(this ExpressionContainer <T> instance, Action <T> code)
{
return(Call(() => code(instance)));
}
public static ExpressionContainer <TV> Code <T, TV>(this ExpressionContainer <T> instance, Func <T, TV> code)
{
return(Call(() => code(instance)));
}
/// <summary>
/// Adds new "line" to <see cref="BlockExpression"/>
/// </summary>
public BlockBuilder Line <TV>(ExpressionContainer <TV> e)
{
_expressions.Add(e);
return(this);
}
/// <summary>
/// Creates new <see langword="case"/> expression for values specified in <paramref name="testValues"/>
/// </summary>
/// <param name="expression"></param>
/// <param name="testValues"></param>
/// <returns></returns>
public SwitchBuilder <T> Case(ExpressionContainer expression, params ExpressionContainer <T>[] testValues)
{
Cases.Add(Expression.SwitchCase(expression, testValues.Select(o => o.Expression)));
return(this);
}
public static ExpressionContainer Using <T>(this ExpressionContainer <T> instance, Action <ExpressionContainer <T>, BlockBuilder> blockBody) where T : IDisposable
{
return(Try()
.Body(block => blockBody(instance, block))
.Finally(instance.Call(o => o.Dispose())));
}
public static ExpressionContainer Assign <T>(this ExpressionContainer <T> target, Expression value)
{
return(new ExpressionContainer(Expression.Assign(target, value)));
}
public static ExpressionContainer Assign <T>(this ExpressionContainer <T> target, T value)
{
return(new ExpressionContainer(Expression.Assign(target, Expression.Constant(value, typeof(T)))));
}
internal SwitchBuilder(ExpressionContainer <T> value) : base(Expression.Empty())
{
Value = value;
}
public static ExpressionContainer Call <T>(this ExpressionContainer <T> instance, Expression <Action <T> > invocationExpression)
{
return(new ExpressionContainer(ExpressionUtils.ProcessCallLambda(invocationExpression, instance)));
}
/// <summary>
/// Creates <see langword="default"/> case
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public SwitchBuilder <T> Default(ExpressionContainer expression)
{
DefaultCase = expression;
return(this);
}
public static ExpressionContainer <TV> Call <T, TV>(this ExpressionContainer <T> instance, Expression <Func <T, TV> > invocationExpression)
{
return(Arg <TV>(ExpressionUtils.ProcessCallLambda(invocationExpression, instance)));
}
