{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,27]],"date-time":"2026-02-27T03:47:19Z","timestamp":1772164039710,"version":"3.50.1"},"publisher-location":"New York, NY, USA","reference-count":24,"publisher":"ACM","license":[{"start":{"date-parts":[[2011,6,4]],"date-time":"2011-06-04T00:00:00Z","timestamp":1307145600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2011,6,4]]},"DOI":"10.1145\/1993498.1993569","type":"proceedings-article","created":{"date-parts":[[2011,6,6]],"date-time":"2011-06-06T07:53:52Z","timestamp":1307346832000},"page":"602-613","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":10,"title":["Taming the wildcards"],"prefix":"10.1145","author":[{"given":"John","family":"Altidor","sequence":"first","affiliation":[{"name":"University of Massachusetts, Amherst, Amherst, MA, USA"}]},{"given":"Shan Shan","family":"Huang","sequence":"additional","affiliation":[{"name":"LogicBlox Inc., Atlanta, GA, USA"}]},{"given":"Yannis","family":"Smaragdakis","sequence":"additional","affiliation":[{"name":"University of Massachusetts, Amherst, Amherst, MA, USA"}]}],"member":"320","published-online":{"date-parts":[[2011,6,4]]},"reference":[{"key":"e_1_3_2_1_1_1","doi-asserted-by":"crossref","unstructured":"J. Altidor S. S. Huang and Y. Smaragdakis. Taming the wildcards: Combining definition- and use-site variance (extended version). http:\/\/www.cs.umass.edu\/ yannis\/variance-extended2011.pdf.  J. Altidor S. S. Huang and Y. Smaragdakis. Taming the wildcards: Combining definition- and use-site variance (extended version). http:\/\/www.cs.umass.edu\/ yannis\/variance-extended2011.pdf.","DOI":"10.1145\/1993498.1993569"},{"key":"e_1_3_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/97945.97966"},{"key":"e_1_3_2_1_3_1","unstructured":"Apache Software Foundation. Apache commons-collections library. http:\/\/larvalabs.com\/collections\/. Version 4.01.  Apache Software Foundation. Apache commons-collections library. http:\/\/larvalabs.com\/collections\/. Version 4.01."},{"key":"e_1_3_2_1_4_1","unstructured":"J. Bloch. The closures controversy. http:\/\/www.javac.info\/bloch-closures-controversy.ppt. Accessed Nov. 2010.  J. Bloch. The closures controversy. http:\/\/www.javac.info\/bloch-closures-controversy.ppt. Accessed Nov. 2010."},{"key":"e_1_3_2_1_5_1","unstructured":"K. Boumillion and J. Levy. Guava: Google core libraries for Java 1.5  K. Boumillion and J. Levy. Guava: Google core libraries for Java 1.5"},{"key":"e_1_3_2_1_6_1","volume-title":"http:\/\/code.google.com\/p\/guava-libraries\/. Accessed","year":"2010","unstructured":". http:\/\/code.google.com\/p\/guava-libraries\/. Accessed Nov. 2010 . . http:\/\/code.google.com\/p\/guava-libraries\/. Accessed Nov. 2010."},{"key":"e_1_3_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1145\/165854.165893"},{"key":"e_1_3_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-70592-5_2"},{"key":"e_1_3_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1145\/286936.286958"},{"key":"e_1_3_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1093\/comjnl\/32.4.305"},{"key":"e_1_3_2_1_11_1","unstructured":"J.-M. Dautelle etal Jscience. http:\/\/jscience.org\/. Accessed Nov. 2010.  J.-M. Dautelle et al. Jscience. http:\/\/jscience.org\/. Accessed Nov. 2010."},{"key":"e_1_3_2_1_12_1","unstructured":"J.-M. Dautelle and W. Keil. Jsr-275: Measures and units. http:\/\/www.jcp.org\/en\/jsr\/detail?id=275. Accessed Nov. 2010.  J.-M. Dautelle and W. Keil. Jsr-275: Measures and units. http:\/\/www.jcp.org\/en\/jsr\/detail?id=275. Accessed Nov. 2010."},{"key":"e_1_3_2_1_13_1","doi-asserted-by":"publisher","DOI":"10.1145\/217838.217852"},{"key":"e_1_3_2_1_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/11785477_18"},{"key":"e_1_3_2_1_15_1","unstructured":"E. Friedman and R. Eden. Gnu Trove: High-performance collections library for Java. http:\/\/trove4j.sourceforge.net\/. Version 2.1.0.  E. Friedman and R. Eden. Gnu Trove: High-performance collections library for Java. http:\/\/trove4j.sourceforge.net\/. Version 2.1.0."},{"key":"e_1_3_2_1_16_1","volume-title":"C\\# Language Specification","author":"Hejlsberg A.","year":"2003","unstructured":"A. Hejlsberg , S. Wiltamuth , and P. Golde . C\\# Language Specification . Addison-Wesley Longman Publishing Co., Inc. , Boston, MA , 2003 . A. Hejlsberg, S. Wiltamuth, and P. Golde. C\\# Language Specification. Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 2003."},{"key":"e_1_3_2_1_17_1","doi-asserted-by":"publisher","DOI":"10.1145\/1218563.1218584"},{"key":"e_1_3_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1145\/1152649.1152650"},{"key":"e_1_3_2_1_19_1","doi-asserted-by":"publisher","DOI":"10.1002\/cpe.v16:7"},{"key":"e_1_3_2_1_20_1","doi-asserted-by":"publisher","DOI":"10.1109\/ICSE.2007.70"},{"key":"e_1_3_2_1_21_1","volume-title":"The Scala Language Specification v 2.8","author":"Odersky M.","year":"2010","unstructured":"M. Odersky . The Scala Language Specification v 2.8 . 2010 . M. Odersky. The Scala Language Specification v 2.8. 2010."},{"key":"e_1_3_2_1_22_1","unstructured":"A. Salcianu. Java program analysis utilities library. http:\/\/jpaul.sourceforge.net\/. Version 2.5.1.  A. Salcianu. Java program analysis utilities library. http:\/\/jpaul.sourceforge.net\/. Version 2.5.1."},{"key":"e_1_3_2_1_23_1","doi-asserted-by":"publisher","DOI":"10.5555\/646156.679846"},{"key":"e_1_3_2_1_24_1","doi-asserted-by":"publisher","DOI":"10.1145\/967900.968162"}],"event":{"name":"PLDI '11: ACM SIGPLAN Conference on Programming Language Design and Implementation","location":"San Jose California USA","acronym":"PLDI '11","sponsor":["SIGPLAN ACM Special Interest Group on Programming Languages"]},"container-title":["Proceedings of the 32nd ACM SIGPLAN Conference on Programming Language Design and Implementation"],"original-title":[],"link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1993498.1993569","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/1993498.1993569","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T07:00:04Z","timestamp":1750230004000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1993498.1993569"}},"subtitle":["combining definition- and use-site variance"],"short-title":[],"issued":{"date-parts":[[2011,6,4]]},"references-count":24,"alternative-id":["10.1145\/1993498.1993569","10.1145\/1993498"],"URL":"https:\/\/doi.org\/10.1145\/1993498.1993569","relation":{"is-identical-to":[{"id-type":"doi","id":"10.1145\/1993316.1993569","asserted-by":"object"}]},"subject":[],"published":{"date-parts":[[2011,6,4]]},"assertion":[{"value":"2011-06-04","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}