Report malformed Object::Pad BUILD declarations clearly
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評估
研究方向
Start with the class-block parser in the Perl front end, where BUILD is recognized and where a missing block body falls through into expression parsing. Reproduce with class BadBuild { BUILD method value {} } under use Object::Pad; and confirm the current unblessed-reference error. Done when that input yields a targeted syntax diagnostic, out-of-class BUILD gets coverage, and valid BUILD blocks still pass the existing Object::Pad tests.
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描述
Context
PR #1804 added support for valid Object::Pad BUILD { ... } blocks, including execution after field initialization, and passed the CAD::OpenSCAD 0.14 acceptance tests on both JVM and interpreter backends. The original parser failure is fixed.
Remaining diagnostic gap
Malformed or misplaced BUILD syntax should receive a focused compile-time diagnostic. Today, an incomplete class block can fall through into ordinary expression parsing and fail later with a confusing runtime error.
For example, against the merged implementation:
use Object::Pad;
class BadBuild { BUILD method value {} }
currently reports Can't call method "value" on unblessed reference instead of identifying the malformed BUILD declaration.
Follow-up
- Detect
BUILDin a class block when it is not followed by a block body and report a targeted syntax diagnostic. - Add project-owned coverage for malformed and out-of-class
BUILDdeclarations. - Keep valid Object::Pad
BUILDblocks and their constructor behavior unchanged.
Related: #1450, PR #1804.
- 主要語言
- Perl
- 星號
- 64
- 分支
- 7
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- 214
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