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 * @name Alert suppression
 * @description Generates information about alert suppressions.
 * @kind alert-suppression
 * @id py/alert-suppression
private import codeql.util.suppression.AlertSuppression as AS
private import semmle.python.Comment as P
class AstNode instanceof P::AstNode {
  predicate hasLocationInfo(
    string filepath, int startline, int startcolumn, int endline, int endcolumn
    super.getLocation().hasLocationInfo(filepath, startline, startcolumn, endline, endcolumn)
  string toString() { result = super.toString() }
class SingleLineComment instanceof P::Comment {
  predicate hasLocationInfo(
    string filepath, int startline, int startcolumn, int endline, int endcolumn
    super.getLocation().hasLocationInfo(filepath, startline, startcolumn, endline, endcolumn)
  string getText() { result = super.getContents() }
  string toString() { result = super.toString() }
import AS::Make<AstNode, SingleLineComment>
 * A noqa suppression comment. Both pylint and pyflakes respect this, so lgtm ought to too.
class NoqaSuppressionComment extends SuppressionComment instanceof SingleLineComment {
  NoqaSuppressionComment() {
    SingleLineComment.super.getText().regexpMatch("(?i)\\s*noqa\\s*([^:].*)?")
  override string getAnnotation() { result = "lgtm" }
  override predicate covers(
    string filepath, int startline, int startcolumn, int endline, int endcolumn
    this.hasLocationInfo(filepath, startline, _, endline, endcolumn) and
    startcolumn = 1

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