/// <summary>
/// index = "[", expr, [ ",", expr ], "]"
/// </summary>
/// <param name="parent">Parent node get index from</param>
/// <returns></returns>
public IdentifierNode ParseIndex()
{
// "["
var lexem = GetLexem();
SkipLexem();
var index1 = ParseExpr();
if (PeekLexem(LexemType.Comma))
{
SkipLexem();
// ? ","
// double index!
var index2 = ParseExpr();
// "]"
if (!PeekLexem(LexemType.SquareClose)) Error(Resources.errSquareBracketExpected);
SkipLexem(true);
// look ahead: if "=" then assignment and break loop
var node = new MatrixGetNode();
node.Index1 = index1;
node.Index2 = index2;
node.Lexem = lexem;
return node;
}
else
{
// "]"
if (!PeekLexem(LexemType.SquareClose)) Error(Resources.errSquareBracketExpected);
SkipLexem(true);
var node = new ArrayGetNode();
node.Index = index1;
node.Lexem = lexem;
return node;
}
}
public ArraySetNode(ArrayGetNode node)
{
ExpressionPrefix = node.ExpressionPrefix;
Index = node.Index;
}