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Analyzer: W0102 warn on infinite loop without yield

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Emits W0102 when a \`loop\` body contains no \`break\`, \`return\`,
\`transition\`, or \`wait_frame\`, since such loops spin forever and
prevent vblank from being handled. The check recurses into nested
if/while bodies so that \`break\` behind a condition still counts.

https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
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Claude 2026-04-12 10:54:30 +00:00
parent 6f0e4a0a74
commit 21a74652f2
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3 changed files with 98 additions and 2 deletions
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8
src/errors/diagnostic.rs
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@ -45,7 +45,6 @@ pub enum ErrorCode {
// W01xx: Warnings
#[allow(dead_code)]
W0101, // expensive multiply/divide operation
#[allow(dead_code)]
W0102, // loop without break or wait_frame
W0103, // unused variable
W0104, // unreachable state
@ -118,6 +117,13 @@ impl Diagnostic {
}
}
/// Construct a diagnostic with the level implied by the code
/// (identical to [`Diagnostic::error`], but reads better at call
/// sites that emit a warning code).
pub fn warning(code: ErrorCode, message: impl Into<String>, span: Span) -> Self {
Self::error(code, message, span)
}
#[must_use]
pub fn with_help(mut self, help: impl Into<String>) -> Self {
self.help = Some(help.into());