Method ParseAndAddLine

Source/script.cpp:1948–2713

ResultType Script::ParseAndAddLine(char *aLineText, char *aActionName, char *aEndMarker
	, char *aLiteralMap, size_t aLiteralMapLength
	, ActionTypeType aActionType, ActionTypeType aOldActionType)
// Returns OK or FAIL.
// aLineText needs to be a string whose contents are modifiable (this
// helps performance by allowing the string to be split into sections
// without having to make temporary copies).
{
#ifdef _DEBUG
	if (!aLineText || !*aLineText)
		return ScriptError("ParseAndAddLine() called incorrectly.");
#endif

	// The characters below are ordered with most-often used ones first, for performance:
	#define DEFINE_END_FLAGS \
		char end_flags[] = {' ', g_delimiter, '(', '\t', '<', '>', ':', '=', '+', '-', '*', '/', '!', '~', '&', '|', '^', '\0'}; // '\0' must be last.
	DEFINE_END_FLAGS

	char action_name[MAX_VAR_NAME_LENGTH + 1], *end_marker;
	if (aActionName) // i.e. this function was called recursively with explicit values for the optional params.
	{
		strcpy(action_name, aActionName);
		end_marker = aEndMarker;
	}
	else
		if (   !(end_marker = ParseActionType(action_name, aLineText, true))   )
			return FAIL; // It already displayed the error.

	// Find the arguments (not to be confused with exec_params) of this action, if it has any:
	char *action_args = omit_leading_whitespace(end_marker + 1);
	// Now action_args is either the first delimiter or the first parameter (if it optional first
	// delimiter was omitted):
	bool is_var_and_operator;
	if (*action_args == g_delimiter)
	{
		is_var_and_operator = false;  // Since there's a comma, we know it's not, e.g. something, += 4
		// Find the start of the next token (or its ending delimiter if the token is blank such as ", ,"):
		for (++action_args; IS_SPACE_OR_TAB(*action_args); ++action_args);
	}
	else
	{
		// The next line is used to help avoid ambiguity of a line such as the following:
		// Input = test  ; Would otherwise be confused with the Input command.
		// But there may be times when a line like this would be used:
		// MsgBox =  ; i.e. the equals is intended to be the first parameter, not an operator.
		// In the above case, the user can provide the optional comma to avoid the ambiguity:
		// MsgBox, =
		switch(*action_args)
		{
		case '=':
		case ':':  // i.e. :=
		case '(':  // i.e. "if (expr)"
			is_var_and_operator = true;
			break;
		case '*':
		case '/':
		case '-':
		case '+':