Class FalseCondition

A detector that highlights conditions that evaluate to a constant true or false in if, while, or until statements, and zero iterations in repeat statements.

Why is it bad?

Conditions that always evaluate to a constant true or false are likely the result of a typo or logic error. Such conditions can lead to unintended behavior, dead code, or incorrect control flow. This detector helps identify these cases so they can be corrected, improving the code's reliability.

Example

const FALSE: Bool = false;
// Bad: Always false because of operator precedence
if ((param | value) & FALSE) {
 // ... never executed
}

Use instead:

const FALSE: Bool = false;
// OK: Fixed after the analyzer highlighted this
if (param) {}

Hierarchy (view full)

Constructors

constructor

Properties

ctx severity

Accessors

id kind shareImportedWarnings usesSouffle

Methods

check makeWarning skipUnused

Constructors

constructor

Properties

Readonlyctx

ctx: MistiContext

severity

severity: Severity = Severity.MEDIUM

Gets the severity of the detector.

Accessors

id

  • get id(): string

  • Gets the short identifier of the detector, used in analyzer warnings.

    Returns string

    The unique identifier of the detector.

kind

shareImportedWarnings

  • get shareImportedWarnings(): WarningsBehavior

  • Defines the behavior of warnings generated by this detector when working with multiple projects within a single Tact configuration.

    Here are the available options:

    1. "union" Leave this value if you don't care about warnings generated in other projects.
    2. "intersect" If the warning is generated for some source location of the imported file, it should be generated by each of the projects. Example: Constants from an imported file should not be reported iff they are unused in all the projects, so you need "intersect".

    Returns WarningsBehavior

usesSouffle

  • get usesSouffle(): boolean

  • Checks whether this detector needs the Soufflé binary to be executed.

    Returns boolean

Methods

check

ProtectedmakeWarning

ProtectedskipUnused

Settings

Member Visibility

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Why is it bad?Example
Constructors
Properties
Accessors
Methods