internal static ConditionalBlock CurrentBlock(this ConditionalBlock block)
{
if (block.IsComplete)
{
return(null);
}
if (block.Else != null &&
block.Else.HasIncompleteChildren())
{
return(((IList <ConditionalBlock>)block.Else.ChildBlocks).CurrentBlock());
}
if (block.ElseIfs.Count > 0)
{
var lastElseIf = block.ElseIfs.Last();
if (lastElseIf.HasIncompleteChildren())
{
return(((IList <ConditionalBlock>)lastElseIf.ChildBlocks).CurrentBlock());
}
}
if (block.If != null &&
block.If.HasIncompleteChildren())
{
return(((IList <ConditionalBlock>)block.If.ChildBlocks).CurrentBlock());
}
// If we get to here then there are no child blocks and this must be the current one.
return(block);
}
internal static bool IsElseStatementActive(this ConditionalBlock block)
{
if (IsConditionalNodeActive(block.If))
{
return(false);
}
if (block.ElseIfs.Any(s => IsConditionalNodeActive(s)))
{
return(false);
}
return(true);
}
internal void ExecutePreprocessorStatement(string line)
{
if (line.Contains("\n") || line.Contains("\r"))
{
throw new ArgumentException("Parameter line cannot contain line break characters.");
}
SetupParser(line);
var tree = parser.preprocessorStatement();
// TODO handle syntax errors.
// depending on the type of statement take the appropriate action.
if (tree.constantDeclaration() != null)
{
compilerConstants.Add(tree.constantDeclaration());
// TODO handle syntax errors.
}
else
{
var current = conditionalBlocks.CurrentBlock();
if (current == null)
{
current = new ConditionalBlock();
conditionalBlocks.Add(current);
}
if (tree.ifStatement() != null)
{
var result = evaluator.Visit(tree);
current.AddNode(tree.ifStatement(), result);
}
else if (tree.elseIfStatement() != null)
{
var result = evaluator.Visit(tree);
current.AddNode(tree.elseIfStatement(), result);
}
else if (tree.elseStatement() != null)
{
var result = current.IsElseStatementActive();
current.AddNode(tree.elseStatement(), result);
}
else if (tree.endIfStatement() != null)
{
current.AddNode(tree.endIfStatement(), null);
}
else
{
throw new Exception("Unknown node type.");
}
// TODO handle syntax errors.
}
}
internal static bool IsActive(this ConditionalBlock block)
{
if (block.EndIf != null)
{
return(false);
}
if (block.Else != null)
{
return(((ConditionalNode <PreprocessorParser.ElseStatementContext>)block.Else).IsActive());
}
if (block.ElseIfs.Count > 0)
{
return(((ConditionalNode <PreprocessorParser.ElseIfStatementContext>)block.ElseIfs.Last()).IsActive());
}
if (block.If != null)
{
return(((ConditionalNode <PreprocessorParser.IfStatementContext>)block.If).IsActive());
}
throw new Exception("Unknown node type.");
}