| # Tint changes during Origin Trial |
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| ## Changes for M98 |
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| ### Breaking Changes |
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| * Taking the address of a vector component is no longer allowed. |
| * Module-scope declarations can no longer alias a builtin name. [tint:1318](https://crbug.com/tint/1318) |
| * It is now an error to call a function either directly or transitively, from a loop continuing block, that uses `discard`. [tint:1302](https://crbug.com/tint/1302) |
| |
| ### Deprecated Features |
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| * The `isNan()`, `isInf()`, `isFinite()` and `isNormal()` builtins has been deprecated and will be removed in M101. [tint:1312](https://crbug.com/tint/1312) |
| |
| ### New Features |
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| * Shadowing is now fully supported. [tint:819](https://crbug.com/tint/819) |
| * The `dot()` builtin now supports integer vector types. |
| * Identifiers can now start with a single leading underscore. [tint:1292](https://crbug.com/tint/1292) |
| * Control flow analysis has been improved, and functions no longer need to `return` if the statement is unreachable. [tint:1302](https://crbug.com/tint/1302) |
| * Unreachable statements now produce a warning instead of an error, to allow WGSL code to be updated to the new analysis behavior. These warnings may become errors in the future [gpuweb#2378](https://github.com/gpuweb/gpuweb/issues/2378) |
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| ### Fixes |
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| * Fixed an issue where using a module-scoped `let` in a `workgroup_size` may result in a compilation error. [tint:1320](https://crbug.com/tint/1320) |
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| ## Changes for M97 |
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| ### Breaking Changes |
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| * Deprecated `modf()` and `frexp()` builtin overloads that take a pointer second parameter have been removed. |
| * Deprecated texture builtin functions that accepted a `read` access controlled storage texture have been removed. |
| * Storage textures must now only use the `write` access control. |
| |
| ### Deprecated Features |
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| * The `ignore()` builtin has been replaced with phony-assignment. [gpuweb#2127](https://github.com/gpuweb/gpuweb/pull/2127) |
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| ### New Features |
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| * `any()` and `all()` now support a `bool` parameter. These simply return the passed argument. [tint:1253](https://crbug.com/tint/1253) |
| * Call statements may now include functions that return a value (`ignore()` is no longer needed). |
| * The `interpolate(flat)` attribute can now be specified on integral user-defined IO. It will eventually become an error to define integral user-defined IO without this attribute. |
| * Matrix construction from scalar element values is now supported. |
| |
| ### Fixes |
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| * Swizzling of `vec3` types in `storage` and `uniform` buffers has been fixed for Metal 1.x. [tint:1249](https://crbug.com/tint/1249) |
| * Calling a function that returns an unused value no longer produces an FXC compilation error. [tint:1259](https://crbug.com/tint/1259) |
| |
| ## Changes for M95 |
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| ### New Features |
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| * The size of an array can now be defined using a non-overridable module-scope constant |
| * The `num_workgroups` builtin is now supported. |
| |
| ### Fixes |
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| * Hex floats: now correctly errors when the magnitude is non-zero, and the exponent would cause overflow. [tint:1150](https://crbug.com/tint/1150), [tint:1166](https://crbug.com/tint/1166) |
| * Identifiers beginning with an underscore are now correctly rejected. [tint:1179](https://crbug.com/tint/1179) |
| * `abs()` fixed for unsigned integers on SPIR-V backend |
