/// <summary>
/// Finds least binding parameter, taking ( and ) into account.
/// </summary>
/// <param name="code"></param>
/// <returns></returns>
private int FindLeastBinding(List <ParseCode> code)
{
// Make sure no additional ()s.
RemoveUnneededGroups(code);
if (code.Count == 1)
{
if (code[0].Id != ParseCodeId.Identifier)
{
throw
new InvalidMathExpression("Cannot compile expression, identifier expected.");
}
return(0);
}
int index = -1;
ParseCodeId id = ParseCodeId.None;
int depth = 0;
for (int i = 0; i < code.Count; i++)
{
ParseCode c = code[i];
if (depth == 0 && c.Id != ParseCodeId.Identifier && c.Id != ParseCodeId.Comma)
{
if ((int)c.Id > (int)id)
{
index = i;
id = c.Id;
}
}
// We advance depth.
if (c.Id == ParseCodeId.Begin || c.Id == ParseCodeId.BeginFunction)
{
depth++;
}
if (c.Id == ParseCodeId.End)
{
depth--;
}
}
if (depth != 0)
{
throw new InvalidMathExpression("The number of '(' and ')' does not match.");
}
if (index == -1)
{
throw new InvalidMathExpression("Multiple identifiers, cannot compile.");
}
// Least bound returned.
return(index);
}
public ParseCode(string id)
{
Id = ParseCodeId.Identifier; Identifier = id;
}
public ParseCode(ParseCodeId code, string id)
{
Id = code; Identifier = id;
}
public ParseCode(ParseCodeId id)
{
Id = id;
}
