Terramate Functions ​

Terramate provides the same built-in functions as Terraform v0.15.13 but prefixed with tm_. For example, to use the try function when evaluating a global:

globals {
  a = tm_try(global.b, null)
}

Will work exactly as Terraform's try function. Terramate also provides some custom functions of its own.

To define each function prototype we use with a small pseudo language where each parameter is defined just with its type and -> type to indicate a return type, if any.

Most types are self explanatory, one special type though would be expr. When expr is used it means an expression that may not be evaluated into a value of a specific type. This is important for functions that uses partially evaluated expressions as parameters and may return expressions themselves.