v.build_constraint #

fn new_environment(facts []string, defines []string) &Environment

new_environment creates a new Environment. facts is a list of predefined platforms, compilers, build options etc, for example: ['linux', 'tinyc', 'prod', 'amd64'] defines is a list of the user defines, for example: ['abc', 'gcboehm_opt', 'gg_record', 'show_fps']

struct Environment {
pub mut:
	facts   map[string]bool
	defines map[string]bool
}

Environment represents the current build environment.

fn (b &Environment) eval(constraint string) !bool

eval evaluates the given build constraint against the current environment. The constraint can be for example something simple like just linux, but it can be also a more complex logic expression like: (windows && tinyc) || prod

fn (b &Environment) is_fact(fact string) bool

is_fact checks whether the given fact is present in the environment.

fn (b &Environment) is_define(define string) bool

is_define checks whether the given define is present in the environment.