• littledan's avatar
    Implement TypedArray(typedarray) constructor · 2fa1c884
    littledan authored
    The ES2016 draft spec defines a sort of fast path for constructing
    a TypedArray based on another TypedArray. This patch implements that
    alternative path in TypedArray construction. It is verified by
    test262 tests, which now pass. This patch also has a slight cleanup
    of TypedArray code by using a macro for TypedArray type checks, as
    is done for other types.
    
    This patch includes a minor spec violation: In the same-type case, the
    spec indicates that the underlying ArrayBuffer should be copied until
    the end, and this is fixed up by making the [[ArrayLength]] shorter.
    This is observable with the buffer getter. This patch just copies the
    used part of the underlying ArrayBuffer.
    
    R=adamk
    BUG=v8:4726
    LOG=Y
    
    Review URL: https://codereview.chromium.org/1754593003
    
    Cr-Commit-Position: refs/heads/master@{#34443}
    2fa1c884
typedarray.js 30.5 KB