/// <summary>Indicates whether the current object is equal to another object of the same type.</summary>
/// <param name="other">An object to compare with this object.</param>
/// <returns>true if the current object is equal to the <paramref name="other">other</paramref> parameter; otherwise, false.</returns>
public bool Equals(CompoundExpression other)
{
if (ReferenceEquals(_components, other._components))
{
return(true);
}
if (_components is null || other._components is null)
{
return(false);
}
if (_components.Length != other._components.Length)
{
return(false);
}
for (var i = 0; i < _components.Length; i++)
{
if (!((IEquatable <ExpressionComponent>)_components[i]).Equals(other._components[i]))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Converts the string representation of a expression to its structured equivalent.
/// A return value indicates whether the conversion succeeded.
/// </summary>
/// <param name="s">A string containing a expression to convert.</param>
/// <param name="result">
/// When this method returns, contains the structured equivalent of the expression contained in <paramref name="s"/>,
/// if the conversion succeeded, or default if the conversion failed. The conversion fails if the <paramref name="s"/> parameter
/// is not in a format compliant with the Open API expression specification. This parameter is passed uninitialized;
/// any value originally supplied in result will be overwritten.
/// </param>
/// <returns><c>true</c> if s was converted successfully; otherwise, <c>false</c>.</returns>
public static bool TryParse(string s, out CompoundExpression result)
{
if (string.IsNullOrEmpty(s))
{
result = default;
return(s != null);
}
var currentComponent = new StringBuilder();
var components = new List <ExpressionComponent>();
var lastIndex = s.Length - 1;
for (var i = 0; i < s.Length; i++)
{
var c = s[i];
if (c == '{' || c == '}')
{
if (i == lastIndex)
{
result = default;
return(false);
}
i++;
if (s[i] == c)
{
currentComponent.Append(c);
}
else
{
if (c != '{' || !FieldExpression.TryParse(s, out var field, ref i, true) || i >= s.Length || s[i] != '}')
{
result = default;
return(false);
}
if (currentComponent.Length != 0)
{
components.Add(new LiteralExpression(currentComponent.ToString()));
currentComponent.Clear();
}
components.Add(field);
}
}
else
{
currentComponent.Append(c);
}
}
if (currentComponent.Length != 0)
{
components.Add(new LiteralExpression(currentComponent.ToString()));
currentComponent.Clear();
}
result = new CompoundExpression(components.ToArray());
return(true);
}
