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Improve error messaging when using `<#slot />` in template via `embed_sface/1` macro

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评估

难度
3/5
预计耗时
1-2 天
新手友好度
45/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
停滞
技术栈
elixir
领域
compilers

调研方向

Reproduce the failure by updating test/surface_test_embed_sface.sface with the shown template. Then inspect lib/surface/compiler/eex_engine.ex around build_render_slot_context_expr/3 and the embed_sface expansion path. Done means the misuse produces a clear diagnostic or the documented alternative is clearly surfaced, with the reproduction covered by a test.

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描述

Maybe it was because I was programming when I should have been in bed - but I got stumped by this. It took a bit of reflection to realize I needed to use {@inner_content} instead of default slot with embed_sface/1 and .sface templates.

Using <#slot /> here resulted in an ArgumentError like this:

(ArgumentError) errors were found at the given arguments:

  * 2nd argument: not a tuple

    :erlang.element(1, nil)
    (surface 0.11.0) lib/surface/compiler/eex_engine.ex:1214: Surface.Compiler.EExEngine.build_render_slot_context_expr/3
    (surface 0.11.0) lib/surface/compiler/eex_engine.ex:194: Surface.Compiler.EExEngine.to_expression/3
    (surface 0.11.0) lib/surface/compiler/eex_engine.ex:70: Surface.Compiler.EExEngine.generate_buffer/3
    (surface 0.11.0) lib/surface/compiler/eex_engine.ex:35: Surface.Compiler.EExEngine.translate/2
    (surface 0.11.0) expanding macro: Surface.embed_sface/1

Some better messaging would help a lot here - or maybe just a clear callout in the docs?

How to reproduce it

Updating the test/surface_test_embed_sface.sface to look like this can reproduce:

<div>embed_sface</div>
<#slot />

The behavior you expected

I expected <#slot /> to work, and the resulting ArgumentError was of little assistance.

Here is a suggestion:

error: Trying to use `<#slot />` in a deadview/template, use `{@innter_content}` instead.

Your Environment

Surface: v0.11.0
LiveView: v019.4
Elixir: v1.15.3

主要语言
Elixir
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派生
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PR 合并指标
30 天内没有已合并 PR

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  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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