feat: add stream.{splice,forward} canon builtins - #2614
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stream.forward canon builtinstream.splice canon builtin
Implement parsing, validation, encoding, and printing support for the `stream.splice` built-in sketched in WebAssembly/component-model#658: (canon stream.splice $streamT async? (core func $f)) where `$f` has type `(func (param i32 i32 i32) (result i32))`, taking a readable stream end, a writable stream end, and a maximum number of elements to forward. The binary encoding uses the currently-unassigned opcode 0x2e, and validation gates the built-in behind the component model async and "more async builtins" features since it is not yet part of the Component Model specification. Assisted-by: claude:claude-fable-5 Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
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stream.splice canon builtinstream.{splice,forward} canon builtins
Implement parsing, validation, encoding, and printing support for the `stream.forward` built-in specified alongside `stream.splice` in WebAssembly/component-model#658: (canon stream.forward $streamT (core func $f)) where `$f` has type `(func (param i32 i32))`, taking a readable stream end and a writable stream end. Unlike `stream.splice`, which borrows both ends and reports the outcome back to the caller, `stream.forward` transfers both ends out of the calling instance and returns immediately with no result, so it takes neither a `n` parameter nor an `async` immediate. Like `stream.splice` it takes no `canonopt`s, since no elements pass through the caller's linear memory. The binary encoding uses the currently-unassigned opcode 0x2f, and validation gates the built-in behind the component model async and "more async builtins" features since it is not yet part of the Component Model specification. Assisted-by: claude:claude-fable-5 Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>
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Add support for
stream.{splice,forward}builtins as defined in WebAssembly/component-model#658 (spec PR coming soon)