Method Validate

cel/validator.go:263–279

Validate searches the AST for uses of a given function name with a constant argument and performs a check on whether the argument is a valid literal value.

(e *Env, _ ValidatorConfig, a *ast.AST, iss *Issues)

// Validate searches the AST for uses of a given function name with a constant argument and performs a check
// on whether the argument is a valid literal value.
func (v formatValidator) Validate(e *Env, _ ValidatorConfig, a *ast.AST, iss *Issues) {
	root := ast.NavigateAST(a)
	funcCalls := ast.MatchDescendants(root, ast.FunctionMatcher(v.funcName))
	for _, call := range funcCalls {
		callArgs := call.AsCall().Args()
		if len(callArgs) <= v.argNum {
			continue
		}
		litArg := callArgs[v.argNum]
		if litArg.Kind() != ast.LiteralKind {
			continue
		}
		if err := v.check(e, call, litArg); err != nil {
			iss.ReportErrorAtID(litArg.ID(), "invalid %s argument", v.funcName)
		}
	}
}

func evalCall(env *Env, call, arg ast.Expr) error {
	ast := &Ast{impl: ast.NewAST(call, ast.NewSourceInfo(nil))}