// Valid returned objects:
// - "help"
// - int: for choice number
// - Parsed.Divert
// - Variable declaration/assignment
// - Epression
// - Lookup debug source for character offset
// - Lookup debug source for runtime path
public CommandLineInput CommandLineUserInput()
{
CommandLineInput result = new CommandLineInput();
Whitespace();
if (ParseString("help") != null)
{
result.isHelp = true;
return(result);
}
if (ParseString("exit") != null || ParseString("quit") != null)
{
result.isExit = true;
return(result);
}
return((CommandLineInput)OneOf(
DebugSource,
DebugPathLookup,
UserChoiceNumber,
UserImmediateModeStatement
));
}
CommandLineInput UserImmediateModeStatement()
{
var statement = OneOf(SingleDivert, TempDeclarationOrAssignment, Expression);
var inputStruct = new CommandLineInput();
inputStruct.userImmediateModeStatement = statement;
return(inputStruct);
}
CommandLineInput DebugPathLookup()
{
Whitespace();
if (ParseString("DebugPath") == null)
{
return(null);
}
if (Whitespace() == null)
{
return(null);
}
var pathStr = Expect(RuntimePath, "path") as string;
var inputStruct = new CommandLineInput();
inputStruct.debugPathLookup = pathStr;
return(inputStruct);
}
CommandLineInput UserChoiceNumber()
{
Whitespace();
int?number = ParseInt();
if (number == null)
{
return(null);
}
Whitespace();
if (Parse(EndOfLine) == null)
{
return(null);
}
var inputStruct = new CommandLineInput();
inputStruct.choiceInput = number;
return(inputStruct);
}
CommandLineInput DebugSource()
{
Whitespace();
if (ParseString("DebugSource") == null)
{
return(null);
}
Whitespace();
var expectMsg = "character offset in parentheses, e.g. DebugSource(5)";
if (Expect(String("("), expectMsg) == null)
{
return(null);
}
Whitespace();
int?characterOffset = ParseInt();
if (characterOffset == null)
{
Error(expectMsg);
return(null);
}
Whitespace();
Expect(String(")"), "closing parenthesis");
var inputStruct = new CommandLineInput();
inputStruct.debugSource = characterOffset;
return(inputStruct);
}