MissingConstRule class

Detects widget constructor invocations that could be marked const but aren't.

Const widgets are cached and never rebuilt, so missing const is one of the most common (and easiest to fix) performance issues in Flutter apps.

What this catches

Text("Hello")                     // BAD — flagged
SizedBox(height: 16)              // BAD — flagged
EdgeInsets.all(8)                 // BAD — flagged

What this allows

const Text("Hello")               // already const
Text(name)                        // non-const arg — can't be const
Text("Hello $name")               // string interpolation — not constant
Inheritance

Constructors

MissingConstRule()

Properties

category → String
Category bucket for grouping in the report. One of: architecture, performance, memory, ui, api, security, quality.
no setteroverride
defaultSeverity → Severity
Default severity if not overridden by .flutter_audit.yaml.
no setteroverride
description → String
One-line description shown in flutter_audit rules output.
no setteroverride
hashCode → int
The hash code for this object.
no setterinherited
id → String
Stable, snake_case identifier shown in reports and config files. Example: 'missing_const'.
no setteroverride
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

check(ParsedFile file) → List<Issue>
Inspect a parsed file and return any findings.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited