aqua-book/language/expressions/overrideable-constants.md

description

description
Static configuration pieces that affect compilation

Overrideable constants

const

Constant definition.

Constants can be used all across functions, exported and imported. If a constant is defined using ?= , it can be overriden by value via compiler flags or imported values.

-- This can be overriten with -const "target_peer_id = \"other peer id\""
const target_peer_id ?= "this is a target peer id"

-- This constant cannot be overriden
const service_id = "service id"

You can assign only literals to constants. Constant type is the same as literal type. You can override only with a subtype of that literal type.