[compiler][ez] Stop bailing out early for hoisted gated functions #32597
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This was referenced Mar 13, 2025
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mofeiZ
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Mar 13, 2025
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| CompilerError.throwTodo({ | ||
| reason: `Encountered a function used before its declaration, which breaks Forget's gating codegen due to hoisting`, | ||
| description: `Rewrite the reference to ${fnPath.node.id?.name ?? 'this function'} to not rely on hoisting to fix this issue`, | ||
| loc: fnPath.node.loc ?? null, | ||
| suggestions: null, | ||
| }); |
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#32598 replaces this bailout with special handling
mofeiZ
commented
Mar 13, 2025
| }); | ||
| } else { | ||
| fnPath.replaceWith(gatingExpression); | ||
| const gatingExpression = t.conditionalExpression( |
mofeiZ
commented
Mar 13, 2025
| parsedOptions[key] = parseTargetConfig(value); | ||
| break; | ||
| } | ||
| case 'gating': { |
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Moved gating config parsing to BabelPlugin entrypoint -- now it's unconditional and eager like the rest of our config parsing / validation. Previously, we only tried to parse gating if we had successful compilation events.
mofeiZ
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Mar 13, 2025
| return; | ||
| } | ||
|
|
||
| let gating: null | { |
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Changes in this file are all code movement.
- tryParseExternalFunction is moved to
parsePluginOptions, which runs before this function - collect
referencedBeforeDeclaredset here instead eagerly bailing out. This is to prepare for the next PR [compiler] Avoid bailouts when inserting gating #32598. (Also happy to merge these into a single changeset if that's easier to review)
poteto
approved these changes
Mar 13, 2025
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| if (referencedBeforeDeclaration) { | ||
| CompilerError.throwTodo({ | ||
| reason: `Encountered a function used before its declaration, which breaks Forget's gating codegen due to hoisting`, | ||
| description: `Rewrite the reference to ${fnPath.node.id?.name ?? 'this function'} to not rely on hoisting to fix this issue`, | ||
| loc: fnPath.node.loc ?? null, | ||
| suggestions: null, | ||
| }); |
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Small nit; what do you think about moving the throw to the callsite instead of having the boolean arg?
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#32511 replaces this throw, so this is very temporary
Some code movement for the next PR
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Some code movement for the next PR
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