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Define Syntax for Iterator Definition #154
Description
Currently, StdLib's Iterable.zs defines the Iterator-Member like so:
for(item as T) as Iterator<T> => iterate();However, the parser expects:
for(T) {
// What to do in here?
}Defined in ParsedDefinitionMember:
case K_FOR: {
tokens.next();
tokens.required(T_BROPEN, "( expected");
List<IParsedType> loopVariableTypes = new ArrayList<>();
if (tokens.optional(T_BRCLOSE) == null) {
do {
loopVariableTypes.add(IParsedType.parse(tokens));
} while (tokens.optional(T_COMMA) != null);
tokens.required(T_BRCLOSE, ") expected");
}
ParsedFunctionBody body = ParsedStatement.parseFunctionBody(tokens);
return new ParsedIterator(start, modifiers, annotations, loopVariableTypes, body);
}We need to define how the iterator members should look like and how it should behave.
Acceptance Criteria:
- The syntax is defined
- The header in stdlibs is adapted to whatever syntax we adopt
- There exist tests that cover the basic iterator functionality
- Defining an iterator
- Calling it
- Overloading iterators with multiple variables
- Doing that on a generic data type like List
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