Value Stages

All expressions have a value stage which dictate which stage of compilation it may be used in.

Comptime Value Stage

Comptime values are values that are known at compile-time and can be used as comptime expressions. Anywhere that requires a interptime or a runtime value also accept comptime values.

The following are comptime expressions:

• literals
• def variables
• template parameters
• comptime function calls with all arguments being comptime
• global const variables

Runtime Value Stage

Runtime values are values that may only be used at runtime as they are not known and/or cannot be calculated at compile-time. A comptime value may also be used as a runtime value.

The following are runtime expressions:

• global var variables
• var variables and const variables declared in function scope
• calls to external functions that are unknown / not linked in by the build system
• calls to runtime functions
• calls to comptime functions with at least 1 runtime argument