parseArgument method
Implementation
ArgumentContext? parseArgument() {
if (next(TokenType.NAME) && current != null) {
var NAME = current!;
if (next(TokenType.COLON)) {
var COLON = current!;
var val = parseInputValue();
if (val != null) {
return ArgumentContext(NAME, COLON, val);
} else {
errors.add(SyntaxError(
'Missing value or variable in argument.', COLON.span));
return null;
}
} else {
errors.add(
SyntaxError('Missing colon after name in argument.', NAME.span));
return null;
}
} else {
return null;
}
}