The TypedObjects proposal does this, for what it calls non-opaque types (you can define types and then map them onto an ArrayBuffer in various ways). I'm not 100% sure what the latest text is, I expect it is here: https://github.com/tschneidereit/typed-objects-explainer but it could also be here: https://github.com/nikomatsakis/typed-objects-explainer.
TypedObjects is currently a stalled proposal. I expect it may be revived when WebAssembly integration into JS becomes a more seriously discussed topic. --lars On Sun, Jul 2, 2017 at 6:53 AM, J Decker <[email protected]> wrote: > > On Sun, Jul 2, 2017 at 6:50 AM, Isiah Meadows <[email protected]> > wrote: > >> I'm not sure this belongs in the spec. > > > Typed arrays are in the spec.... > http://www.ecma-international.org/ecma-262/6.0/#sec-typedarray-objects > > >> There exists a similar thing on >> npm [1] which deals with Buffers instead, but you could adapt it >> similarly to work with ArrayBuffers (via a DataView). In reality, this >> really only would have two uses: native C interop (in Node/etc.) and >> WebAssembly interop (which is better addressed by separate >> `foo_create` and `foo_destroy` exports with raw pointers and creating >> a JS wrapper to manage them more idiomatically). >> >> [1]: https://www.npmjs.com/package/ref-struct >> ----- >> >> Isiah Meadows >> [email protected] >> >> Looking for web consulting? Or a new website? >> Send me an email and we can get started. >> www.isiahmeadows.com >> >> >> On Sun, Jul 2, 2017 at 9:42 AM, J Decker <[email protected]> wrote: >> > >> > I would like to open a discussion to propose that an extension to >> > http://www.ecma-international.org/ecma-262/6.0/#sec-typedarray-objects >> > should be defined that would allow defintiion of interleaved typed data. >> > >> > Support for interleaved vertex data is one use... >> > >> > https://developer.apple.com/library/content/documentation/3D >> Drawing/Conceptual/OpenGLES_ProgrammingGuide/TechniquesforWo >> rkingwithVertexData/TechniquesforWorkingwithVertexData.html >> > section Use Interleaved Vertex Data >> > >> > >> > https://www.khronos.org/opengl/wiki/Vertex_Specification >> > Defines how OpenGL describes interleaved data. >> > >> > This could also be used to interop with native code as an array of >> packed >> > (C) structs. >> > >> > I don't really know what the definition mechanics might be, but for >> usage I >> > might like to see... >> > >> > var arr = new InterleavedTypeArray( [ { name: "fieldName", >> type:"uint32' }, >> > ... probably an array of objects defining the fields in an element ], >> > <element count> ); >> > >> > arr[x].fieldName = value. >> > >> > >> > >> > _______________________________________________ >> > es-discuss mailing list >> > [email protected] >> > https://mail.mozilla.org/listinfo/es-discuss >> > >> > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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