Function Eval

expr.go:269–290

Eval parses, compiles and runs given input.

(input string, env any)

// Eval parses, compiles and runs given input.
func Eval(input string, env any) (any, error) {
	if _, ok := env.(Option); ok {
		return nil, fmt.Errorf("misused expr.Eval: second argument (env) should be passed without expr.Env")
	}

	tree, err := parser.Parse(input)
	if err != nil {
		return nil, err
	}

	program, err := compiler.Compile(tree, nil)
	if err != nil {
		return nil, err
	}

	output, err := Run(program, env)
	if err != nil {
		return nil, err
	}

	return output, nil
}