• Iain Ireland's avatar
    Reland "[regexp] Rewrite error handling" · 560f2d8b
    Iain Ireland authored
    This is a reland of e80ca24c
    
    Original change's description:
    > [regexp] Rewrite error handling
    >
    > This patch modifies irregexp's error handling. Instead of representing
    > errors as C strings, they are represented as an enumeration value
    > (RegExpError), and only converted to strings when throwing the error
    > object in regexp.cc. This makes it significantly easier to integrate
    > into SpiderMonkey. A few notes:
    >
    > 1. Depending on whether the stack overflows during parsing or
    >    analysis, the stack overflow message can vary ("Stack overflow" or
    >    "Maximum call stack size exceeded"). I kept that behaviour in this
    >    patch, under the assumption that stack overflow messages are
    >    (sadly) the sorts of things that real world code ends up depending
    >    on.
    >
    > 2. Depending on the point in code where the error was identified,
    >    invalid unicode escapes could be reported as "Invalid Unicode
    >    escape", "Invalid unicode escape", or "Invalid Unicode escape
    >    sequence". I fervently hope that nobody depends on the specific
    >    wording of a syntax error, so I standardized on the first one. (It
    >    was both the most common, and the most consistent with other
    >    "Invalid X escape" messages.)
    >
    > 3. In addition to changing the representation, this patch also adds an
    >    error_pos field to RegExpParser and RegExpCompileData, which stores
    >    the position at which an error occurred. This is used by
    >    SpiderMonkey to provide more helpful messages about where a syntax
    >    error occurred in large regular expressions.
    >
    > 4. This model is closer to V8's existing MessageTemplate
    >    infrastructure. I considered trying to integrate it more closely
    >    with MessageTemplate, but since one of our stated goals for this
    >    project was to make it easier to use irregexp outside of V8, I
    >    decided to hold off.
    >
    > R=jgruber@chromium.org
    >
    > Bug: v8:10303
    > Change-Id: I62605fd2def2fc539f38a7e0eefa04d36e14bbde
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2091863
    > Commit-Queue: Jakob Gruber <jgruber@chromium.org>
    > Reviewed-by: Jakob Gruber <jgruber@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#66784}
    
    R=jgruber@chromium.org
    
    Bug: v8:10303
    Change-Id: Iad1f11a0e0b9e525d7499aacb56c27eff9e7c7b5
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2109952Reviewed-by: 's avatarJakob Gruber <jgruber@chromium.org>
    Commit-Queue: Jakob Gruber <jgruber@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#66798}
    560f2d8b
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