Sourced fromgithub.com/zclconf/go-cty's releases.

v1.17.0

cty now requires Go 1.23 or later.

• cty.Value.Elements offers a moderniter.Seq2-based equivalent ofcty.Value.ElementIterator.

• cty.DeepValues offers a moderniter.Seq2-based equivalent ofcty.Walk.

• cty.Value.WrangleMarksDeep allows inspecting and modifying individual marks throughout a possibly-nested data structure.

  Having now got some experience using marks more extensively in some callers, it's become clear that it's often necessary for different subsystems to be able to collaborate using independent marks without upsetting each other's assumptions. Today that tends to be achieved using hand-written transforms either withcty.Transform orcty.Value.UnmarkDeepWithPaths/cty.Value.MarkWithPaths, both of which can be pretty expensive even in the common case where there are no marks present at all.

  This new function allows inspecting and transforming marks with far less overhead, by creating new values only for parts of a structure that actually need to change and by reusing (rather than recreating) the "payloads" of the values being modified when we know that only the marks have changed.

• cty.ValueMarksOfType andcty.ValueMarksOfTypeDeep make it easier to use type-based rather than value-based mark schemes, where different values of a common type are used to track a specific kind of relationship with multiple external values.

• cty.Value.HasMarkDeep provides a "deep" version of the existingcty.Value.HasMark, searching throughout a possibly-nested structure for any values that have the given mark.

• cty.Value.UnmarkDeep andcty.Value.UnmarkDeepWithPaths are now implemented in terms ofcty.Value.WrangleMarksDeep, so they benefit from its reduced overhead. In particular they avoid reconstructing a data structure that contains no marked values at all.

• cty.Value.MarkWithPaths now has a fast path when it's given a zero-lengthPathValueMarks, in which case it just returns the value it was given with no modifications.

Sourced fromgithub.com/zclconf/go-cty's changelog.

1.17.0 (September 5, 2025)

cty now requires Go 1.23 or later.

• cty.Value.Elements offers a moderniter.Seq2-based equivalent ofcty.Value.ElementIterator.

• cty.DeepValues offers a moderniter.Seq2-based equivalent ofcty.Walk.

• cty.Value.WrangleMarksDeep allows inspecting and modifying individual marks throughout a possibly-nested data structure.

  Having now got some experience using marks more extensively in some callers, it's become clear that it's often necessary for different subsystems to be able to collaborate using independent marks without upsetting each other's assumptions. Today that tends to be achieved using hand-written transforms either withcty.Transform orcty.Value.UnmarkDeepWithPaths/cty.Value.MarkWithPaths, both of which can be pretty expensive even in the common case where there are no marks present at all.

  This new function allows inspecting and transforming marks with far less overhead, by creating new values only for parts of a structure that actually need to change and by reusing (rather than recreating) the "payloads" of the values being modified when we know that only the marks have changed.

• cty.ValueMarksOfType andcty.ValueMarksOfTypeDeep make it easier to use type-based rather than value-based mark schemes, where different values of a common type are used to track a specific kind of relationship with multiple external values.

• cty.Value.HasMarkDeep provides a "deep" version of the existingcty.Value.HasMark, searching throughout a possibly-nested structure for any values that have the given mark.

• cty.Value.UnmarkDeep andcty.Value.UnmarkDeepWithPaths are now implemented in terms ofcty.Value.WrangleMarksDeep, so they benefit from its reduced overhead. In particular they avoid reconstructing a data structure that contains no marked values at all.

• cty.Value.MarkWithPaths now has a fast path when it's given a zero-lengthPathValueMarks, in which case it just returns the value it was given with no modifications.

1.16.4 (August 20, 2025)

• cty.UnknownAsNull now accepts marked values and preserves the given marks in its result. Previously it had no direct support for marks and so would either panic or return incorrect results when given marked values.

• da4c600 CHANGELOG: Prepare for v1.17.0 release
• b13ddd4 cty: Use WrangleMarksDeep for UnmarkDeep and UnmarkDeepWithPaths
• 4453ac2 cty: Use DeepValues instead of Walk for deep marks inspections
• f833b10 Bulk replace interface{} -> any
• d4bb9d4 cty: Various new mark-inspecting helpers
• 31572cf cty+ctymarks: Deep mark wrangling helper
• d95a68c cty: Modern iter.Seq2 equivalents of Value.ElementIterator and Walk
• e76eeea v1.16.4 release
• 700a2bc cty: UnknownAsNull accepts marked values and preserves marks
• 3c2b6a0 Prepare for future v1.16.4 release
• See full diff incompare view

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