Decodal/doc/manual/souce/language/expression/logical-and-comparison.md

Logical and Comparison Expressions

Decodal supports boolean logic over concrete Bool values and comparison over concrete scalar values.

{
    is_prod = env == "prod";
    high_port = port > 9000;
    enabled = is_prod && high_port;
    disabled = !enabled;
}

Logical operators

• !expr negates a concrete Bool.
• lhs && rhs returns boolean AND.
• lhs || rhs returns boolean OR.

&& and || short-circuit: the right-hand side is evaluated only when needed. Logical operands must evaluate to concrete Bool values.

Comparison operators

• ==
• !=
• <
• <=
• >
• >=

== and != compare concrete scalar values: String, Bool, Int, and Float. Int and Float can be compared to each other numerically.

Ordering operators <, <=, >, and >= compare concrete numeric values only. They are separate from prefix comparison constraints such as > 443.

port = Int & > 443 default 9443;
is_high = port > 9000;