Function matchConstantFormatStringWithListLiteralArgs

ext/formatting.go:473–506

matchConstantFormatStringWithListLiteralArgs matches all valid expression nodes for string format checking.

(a *ast.AST)

// matchConstantFormatStringWithListLiteralArgs matches all valid expression nodes for string
// format checking.
func matchConstantFormatStringWithListLiteralArgs(a *ast.AST) ast.ExprMatcher {
	return func(e ast.NavigableExpr) bool {
		if e.Kind() != ast.CallKind {
			return false
		}
		call := e.AsCall()
		if !call.IsMemberFunction() || call.FunctionName() != "format" {
			return false
		}
		overloadIDs := a.GetOverloadIDs(e.ID())
		if len(overloadIDs) != 0 {
			found := false
			for _, overload := range overloadIDs {
				if overload == overloads.ExtFormatString {
					found = true
					break
				}
			}
			if !found {
				return false
			}
		}
		formatString := call.Target()
		if formatString.Kind() != ast.LiteralKind || formatString.AsLiteral().Type() != cel.StringType {
			return false
		}
		args := call.Args()
		if len(args) != 1 {
			return false
		}
		formatArgs := args[0]
		return formatArgs.Kind() == ast.ListKind
	}
}

// stringFormatChecker implements the formatStringInterpolater interface
type stringFormatChecker struct {