Bob Nystrom
f093d0a42a
Add MapKeySequence and MapValueSequence classes in core.wren to expose iterable key and value views on Map instances. Implement native iterate_, keyIteratorValue_, and valueIteratorValue_ primitives in wren_core.c to support these sequences. Replace the stub Map.toString with a full implementation that iterates keys and formats each entry as "key: value", handling empty maps and nested maps correctly. Include comprehensive test suites for key iteration, value iteration, iterator type validation, and toString output across multiple orderings.
27 lines
753 B
Plaintext
27 lines
753 B
Plaintext
// Handle empty map.
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IO.print({}.toString) // expect: {}
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// Does not quote strings.
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IO.print({"1": "2"}.toString) // expect: {1: 2}
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// Nested maps.
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IO.print({1: {2: {}}}) // expect: {1: {2: {}}}
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// Calls toString on elements.
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class Foo {
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toString { "Foo.toString" }
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}
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IO.print({1: new Foo}) // expect: {1: Foo.toString}
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// Since iteration order is unspecified, we don't know what order the results
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// will be.
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var s = {1: 2, 3: 4, 5: 6}.toString
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IO.print(s == "{1: 2, 3: 4, 5: 6}" ||
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s == "{1: 2, 5: 6, 3: 4}" ||
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s == "{3: 4, 1: 2, 5: 6}" ||
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s == "{3: 4, 5: 6, 1: 2}" ||
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s == "{5: 6, 1: 2, 3: 4}" ||
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s == "{5: 6, 3: 4, 1: 2}") // expect: true
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// TODO: Handle maps that contain themselves. |