Directives

There is no preprocessor for Jai; directives are just part of the language. ¹

See the following entries in the reference for more details:

• #assert - generate compiler error with <message> when <expression> evaluates to false

• #bake - generate a compiled function with predefined values for type variables

• #bake_values - provide specific values to a function at compile time

• #body_text - provide a procedure to generate source for the body of a polymorphic procedure

• #check_call - run a provided checking function whenever the named function is called

• #file - evaluate to the name of the current source file

• #filepath - evaluate to the path of the currently compiling source file

• #foreign - instruct compiler to link against a foreign library.

• #foreign_library - provide a library for the compiler to link against for procedures marked with #foreign directive.

• #generate - #FIXME find source definition

• #import - bring a library file into scope

• #line - evaluate to the line number of the current statement

• #load - bring a source code file into scope

• #modify - provide a function to manipulate a type variable prior to it being used in a polymorphic procedure

• #must - ensure caller receives return values marked with #must

• #no_inline - prevent inlining of <function_name>

• #run - execute <code> at compile time (not run time)

• #running_at_compile_time - evaluate to true if execution is occuring during compile time