feat: enhance prefer_early_return rule to support loops and parameters - #351
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📝 WalkthroughWalkthroughThe pull request enables the early-return lint, adds configurable parameters, extends analysis to loop bodies, centralizes exit detection, and expands rule tests for functions, loops, closures, switches, and configuration. ChangesEarly-return lint
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The rule may report incorrect suggestions for labeled control flow, emit diagnostics for empty branches when configured with a negative threshold, or interrupt analysis when option types are malformed. The issues are localized, but they should be fixed or explicitly accepted before merging. Sequence Diagram(s)sequenceDiagram
participant Analyzer
participant PreferEarlyReturnRule
participant PreferEarlyReturnVisitor
participant EarlyReturnExitVisitor
participant DiagnosticReporter
Analyzer->>PreferEarlyReturnRule: analyze function or loop
PreferEarlyReturnRule->>PreferEarlyReturnVisitor: provide parsed parameters
PreferEarlyReturnVisitor->>EarlyReturnExitVisitor: check branch exits
EarlyReturnExitVisitor-->>PreferEarlyReturnVisitor: return, throw, break, or continue result
PreferEarlyReturnVisitor->>DiagnosticReporter: report early-return diagnostic
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (7 skipped: 7 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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| parameters: parameters, | ||
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| registry.addBlockFunctionBody(this, visitor); |
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| registry.addBlockFunctionBody(this, visitor); | |
| registry | |
| ..addBlockFunctionBody(this, visitor) | |
| ..addForStatement(this, visitor) | |
| ..addWhileStatement(this, visitor) | |
| ..addDoStatement(this, visitor); |
… in PreferEarlyReturnVisitor while using cascade notation for visitor registration
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Actionable comments posted: 2
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Inline comments:
In
`@lib/src/lints/prefer_early_return/models/prefer_early_return_parameters.dart`:
- Around line 35-37: Validate maximumStatements while parsing
PreferEarlyReturnParameters so negative configured values are rejected or
replaced with the established default before the visitor uses the threshold;
retain valid non-negative values, and add coverage for the maximum_statements
setting.
In `@lib/src/lints/prefer_early_return/visitors/early_return_exit_visitor.dart`:
- Around line 28-37: Update EarlyReturnExitVisitor’s visitBreakStatement and
visitContinueStatement to resolve labeled targets, counting a transfer only when
it exits the analyzed loop/branch; do not treat continue to a switch case as a
loop exit, and recognize break/continue labels that target an outer loop. Add
regression tests covering both labeled-target scenarios.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Pro Plus
Run ID: 1ec9359a-3553-4390-a361-d5b1a9d8e7e3
📒 Files selected for processing (9)
lib/analysis_options.yamllib/main.dartlib/src/lints/prefer_early_return/models/prefer_early_return_parameters.dartlib/src/lints/prefer_early_return/prefer_early_return_rule.dartlib/src/lints/prefer_early_return/visitors/early_return_exit_visitor.dartlib/src/lints/prefer_early_return/visitors/prefer_early_return_visitor.dartlib/src/lints/prefer_early_return/visitors/return_statement_visitor.dartlib/src/lints/prefer_early_return/visitors/throw_expression_visitor.darttest/src/lints/prefer_early_return/prefer_early_return_rule_test.dart
💤 Files with no reviewable changes (2)
- lib/src/lints/prefer_early_return/visitors/throw_expression_visitor.dart
- lib/src/lints/prefer_early_return/visitors/return_statement_visitor.dart
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…ing control flow statement targets against root scope
2 participants
Summary by CodeRabbit
New Features
if-casehandling.for,while, anddo).Documentation