ConstantTernaryExpression.md

Pattern: Constant ternary expression

Issue: -

Description

Checks for ternary expressions with a constant value for the boolean expression, such as true, false, null, or a literal constant value. Examples of violations include:

true ? x : y
false ? x : y
Boolean.TRUE ? x : y
Boolean.FALSE ? x : y
null ? x : y
0 ? x : y
99.7 ? x : y
"" ? x : y
"abc" ? x : y
[:] ? x : y
[a:123, b:456] ? x : y
[a, b, c] ? x : y

The rule also checks for the same types of constant values for the boolean expressions within the "short" ternary expressions, also known as the "Elvis" operator, e.g.:

true ?: y
null ?: y
99.7 ?: y
"abc" ?: y
[:] ?: y
[a, b, c] ?: y

Further Reading

• CodeNarc - ConstantTernaryExpression