|
| |
| | Union (computer science) - Wikipedia, the free encyclopedia |
 | | In computer science, a union is a data structure that stores one of several types of data at a single location. | | | For example, if the fields are all subtypes of a common supertype, then it is always legal to perform operations on the union object that one can perform on the supertype. | | | Most type inference algorithms cannot cope with untagged union types. |
|
http://en.wikipedia.org/wiki/Union_(computer_science)
(632 words)
|
|
| |
| | Tagged union - Wikipedia, the free encyclopedia |
| | This is a tagged union with two cases: one, the leaf, is used to terminate a path of the tree, and functions much like a null value would in imperative languages. | | | In computer science, a tagged union, also called a variant, variant record, discriminated union, or disjoint union, is a data structure used to hold a value that could take on several different, but fixed types. | | | In this case, a helpful alternative may be folded or encoded tags, where the tag value is dynamically computed from the contents of the union field. |
|
http://en.wikipedia.org/wiki/Tagged_union
(1182 words)
|
|
| |
| | Type based models and query languages for Web data |
| | However the use of tagged union types, and their related ``case'' operators, is not flexible enough to deal with semistructured data; for this reason, some researchers are currently investigating the possibility of switching to a more flexible approach based on untagged union types. | | | The first approach is based on the use of union types to define a schema to deal with data irregularities, while the second approach, the preferred one so far, is based on the use of self-describing data, modeled as a labeled graph, without a predefined schema. | | | The approach with tagged union types requires few modifications to a DBMS and preserves the advantages of traditional database languages with respect to the possibility of type-checking and query optimization [ |
|
http://www.di.unipi.it/Evaluation/albano.html
(3322 words)
|
|
| |
| | Advanced CCured Issues |
| | One option is to turn the union into a struct, but we do not recommend this because it increases memory usage and can change the behavior of your program if your code writes to one union field and then reads from a different one. | | | If this is too restrictive for your program and you do not need to maintain binary compatibility with external code, consider letting CCured add its own tag, as described in Section 9.7.1. | | | If your program takes the address of a union field, you should change the union to a struct or otherwise restructure the code. |
|
http://manju.cs.berkeley.edu/ccured/ccured009.html
(4723 words)
|
|
| |
| | Comp 320, Fall 1999, Tutorial 3 |
| | Unions are primarily useful as a building-block for bigger data types, where a value can either be of one type or another, e.g., a list can either be a structure of two things (a cons-cell) or just a marker (an empty list). | | | If the union now only has one case, we can eliminate the union wrapper and thus the tag and the outermost structure wrapper, too. | | | First, remember that we always access our recursive data structure from a pointer, never from just a structure. |
|
http://www.owlnet.rice.edu/~comp320/2000/tutorials/3.html
(1028 words)
|
|
| |
| | Application Development Guide --Core Components |
| | A union cannot contain a pipe, a conformant array, a varying array, or any structure that contains a conformant or varying array. | | | Note that you do not need to define the structure type in the IDL file; it is a forward reference to a structure whose definition can be included into the server code, either from a private.h file or from a server IDL file. | | | A pointer parameter can reference storage that was allocated before the function was called, but a function result cannot. |
|
http://www.univie.ac.at/dcedoc/A3U2J/A3U2J143.HTM
(9608 words)
|
|
| |
| | DCE 1.1: Remote Procedure Call - Interface Definition Language |
| | is omitted, the union is assigned the name tagged_union in the generated header source. | | | The generated header file includes a function prototype for the specified routine. | | | The interface declaration contains an operation parameter, typedef, structure member, union arm, and so on, with more than one * (asterisk) in a pointer declaration. |
|
http://www.opengroup.org/onlinepubs/9629399/chap4.htm
(11786 words)
|
|
| |
| | arthistoryclub.com:Wikicode/Specification - Art History Online Reference and Guide |
| | Records, as well as tagged unions below, are only referred to by reference, and references may contain the special value null to indicate they refer to nothing. | | | All wikicode will be typeset in a fixed-width font, for example by prefixing each line with spaces. | | | A possibly recursive function is defined using the emboldened |
|
http://www.arthistoryclub.com/art_history/arthistoryclub.com:Wikicode/Specification
(3413 words)
|
|
| |
| | Application Development Reference |
| | The attribute value is an internationalized string of bytes with a tag identifying the OSF registered codeset used to encode the data. | | | This encoding type is useful only when attached to a principal object, where it is decrypted and encrypted each time the principal's password changes. | | | The contents of the union depend on the value of sec_rgy_bind_auth_info_type_t. |
|
http://www.csupomona.edu/reference/dce3.1/html/APPREF/APPREF09.HTM
(13021 words)
|
|
| |
| | Cyclone for C Programmers |
| | Untagged unions in Cyclone can hold arbitrary values, but you can only read out ``bits.'' In particular, the members you can read out can only have combinations of chars, ints, shorts, longs, floats, doubles, structs of bits, or tuples of bits. | | | In particular, you can write any value you like into a union, but you can only read out values that do not contain pointers. | | | In these cases, its probably best to use pattern matching to determine the tag and to extract the underlying value. |
|
http://www.cs.cornell.edu/projects/cyclone/online-manual/main-screen002.html
(8358 words)
|
|
| |
| | Tagged Unions and Datatypes |
| | Therefore, we encourage the use of pattern matching where possible. | | | If we failed to leave out one of the cases in the pattern match, then the compiler would warn us. | | | union Foo x; x.i = 3; x.s = "hello"; |
|
http://www.research.att.com/projects/cyclone/online-manual/main-screen004.html
(1133 words)
|
|
| |
| | [No title] |
| | For example, a struct which has been mentioned, but not defined. | | | We only output typedef names after they have been defined. | | | */ static boolean debug_write_type (info, fns, fhandle, type, name) struct debug_handle *info; const struct debug_write_fns *fns; PTR fhandle; struct debug_type *type; struct debug_name *name; { unsigned int i; int is; const char *tag; /* If we have a name for this type, just output it. |
|
http://w3.rz-berlin.mpg.de/~taifun/fhi/mysql-4.0.12/pstack/debug.c
(7157 words)
|
|
| |
| | UNION - Definition |
| | A variable of union type must be allocated sufficient storage space to hold the largest component type. | | | A type whose values may be of one of a number of other types, thet current type depending on conditions that are only known at run-time. | | | A union contrasts with a structure or record which stores values of all component types at once. |
|
http://www.hyperdictionary.com/dictionary/union
(1179 words)
|
|
| |
| | CSE 130 Lecture Notes, April 15, 2002 |
| | Many programming languages like Pascal have one notation that combines unions and products. | | | The idea is that no value of type | | | In mathematics, one of the most basic ways of making a new set is to take the union of two old sets. |
|
http://www-cse.ucsd.edu/~elkan/130/april15.html
(667 words)
|
|
| |
| | Ada Programming/Types/record - Wikibooks |
| | There are two ways to declare a null record: | | | The tagged record is one part of what in other languages is called a class. | | | However, programmers often use the first variant if the type is not finished yet to show that they are planning to expand the type later, or they usually use the second if the (tagged) record is a base class in object oriented programming. |
|
http://en.wikibooks.org/wiki/Programming:Ada:Types:record
(334 words)
|
|
| |
| | System/Verilog Basic Committee: [sv-bc] Tagged Unions Proposal |
| | Show an example of pattern matching that does not involve tagged | | | Attached is a revised PDF of the Tagged Unions and Pattern Matching | | | In reply to: Rishiyur S. Nikhil: "Re: [sv-bc] UPDATE: Reworked Tagged Unions Proposal" |
|
http://www.eda.org/sv-bc/hm/1352.html
(193 words)
|
|
| |
| | Image:Tagged union tree.png - Wikipedia, the free encyclopedia |
| | 200x178 (8060 bytes) (Small tree image for tagged union page, made by Derrick Coetzee in Illustrator.) | | | This page was last modified 17:36, 30 August 2004. | | | Small tree image for tagged union page, made by Derrick Coetzee in Illustrator. |
|
http://www.wikipedia.org/wiki/Image:Tagged_union_tree.png
(122 words)
|
|
| |
| | SEDRIS API Data Types |
| | The characters field stores the string as an array of SE_Characters. | | | Tag of type SE_DRM_Class specifies the DRM class of the object. | | | The tag is used to select the correct union member to access. |
|
http://www.sedris.org/stc/2002/tu/api/tsld013.htm
(51 words)
|
|
| |
| | Tagged Unions |
| | Hence all values of a tunion type occupy one word, either with a small number or with a pointer. | | | has only one value-carrying variant, it does not need a tag field in its implementation. | | | We may provide a tuple-like syntax in the future. |
|
http://csunx4.bsc.edu/cyclone/online-manual/main-screen005.html
(1147 words)
|
|
| |
| | Technorati Tag: union |
| | SignpostMarv, soon to be officially a BSc Multimedia Computing University Student. | | | To contribute to this page, just post to your blog and include this code. | | | kommt von der Rheinische Post: Das stramm rechte Kampfblatt der katholischen Kirche schreibt heute auf seiner Titelseite Union droht SPD mit... |
|
http://technorati.com/tag/union
(606 words)
|
|
| |
| | An exercise in dependent types: A well-typed interpreter - Augustsson, Carlsson (ResearchIndex) |
| | Of course, the programs which make sense do typecheck, and some interesting examples are beginning to appear | | | There is no need for tagging these values with their type, something which opens the door to more efficient interpreters. | | | By using depent types, we can be more precise about the type of values that the intepreter returns. |
|
http://citeseer.lcs.mit.edu/augustsson99exercise.html
(396 words)
|
|
| |
| | TELEO APPLICATION SDK |
| | Go to the source code of this file. | | | This is a very simple tagged union of data types. | | | It corresponds very closely to the format used on the TeleoNetwork. |
|
http://makingthings.com/products/documentation/code/html/TeleoData_8h.html
(47 words)
|
|
| |
| | [No title] |
| | There are special tags in the html files that // this program looks for and replaces as needed. |
|
http://support.entegrity.com/wcsamples/cpw/cpw.c
(686 words)
|
|
| |
| | CComVariant (Visual C++ 6.0) |
| | CComVariant wraps the VARIANT type, which consists of a tagged union, as well as a member indicating the value type stored in the union. |
|
http://msdn.microsoft.com/library/devprods/vs6/visualc/vcmfc/_atl_ccomvariant.htm
(45 words)
|
|
| |
| | Application Development Reference |
| | ) that tells what type of data is in the union, and then appropriate union members to hold the value of the data specified. | | | The attribute type specifies the format of the data in the event attribute value union (ems_attr_value_t). | | | field is of type ems_attr_type_t and can contain only one tagged union field. |
|
http://www.univie.ac.at/dcedoc/A3U2K/A3U2K756.HTM
(2172 words)
|
|
| |
| | mefeedia video tags: protest |
| | This page shows all movies that were tagged with protest by Mefeedia users. | | | We took over all the windows of a building and did coordinated things like jumping jacks. | | | The links are for people who wish to educate themselves a bit more on the subject. |
|
http://mefeedia.com/tags/protest
(938 words)
|
|
| |
| | Coil Piping Package CAD Details |
| | This collection of additional components will provide you with.dwg files of anything from a ball valve to hose to unions. | | | This selection will give you the.dwg file for with and without blow down valves on the strainer section. | | | These are components regularly used in our coil piping packages and hose kits. |
|
http://www.haysfluidcontrols.com/cad_details.htm
(793 words)
|
|
| |
| | Woodson and Pace tagged The San Diego Union-Tribune |
| | Franchise players are paid the average salary of the top five players at their positions or 120 percent of a player's previous salary, whichever is higher. | | | In an attempt to avoid that, Reese said he met with Kearse's agent, Drew Rosenhaus, until about midnight Friday. | | | Both figures were about twice what the Rams were prepared to pay. |
|
http://www.signonsandiego.com/uniontrib/20040222/news_1s22nflnotes.html
(677 words)
|
|
| |
| | [No title] |
| | UNION of exp * {name : string, ty : Type.ty} | | | CAN_SELECT of exp * string (* tag test *) | | | compare'exp (UNION _, FITSs _) = GREATER |
|
http://www.eecs.harvard.edu/~nr/toolkit/working/sml/NW/ty.ty.exp.ord.sml
(17827 words)
|
|
| |
| | [No title] |
| | UNION of {name : string, ty : Type.ty} | | | CAN_SELECT of string (* tag test *) | | | compare'unop (UNION _, FITSu _) = GREATER |
|
http://www.eecs.harvard.edu/~nr/toolkit/working/sml/NW/ty.ty.ord.sml
(4036 words)
|
|
| |
| | TELEO APPLICATION SDK |
| | The documentation for this struct was generated from the following file: | | | Tagged union that contains data sent to or received from Modules |
|
http://makingthings.com/products/documentation/code/html/structTeleoData.html
(31 words)
|
|
| |
| | [No title] |
| | /* * Classes: Members 2.0 - Unions * * Class A defines a tagged union member. | | | * * Class B defines an anonymous union member. |
|
http://faculty.washington.edu/jkp/CPP/Intro/code/union0.cpp
(25 words)
|
|
| |
| | Flickr: Photos tagged with union |
| | Tags help you find photos which have something in common. | | | You can give your photos a "tag", which is like a keyword. | | | You can assign as many tags as you wish to each photo. |
|
http://www1.flickr.com/photos/tags/union
(84 words)
|
|
| |
| | All posts tagged with union Metafilter |
| | Civil War Richmond: an online research project designed to collect documents, photographs, and maps pertaining to Richmond, Virginia, during the Civil War. | | | Look up more - Improv Everywhere has been mentioned before but this latest mission is the largest yet. | | | Apparently so according to a new video released by the owners of the linked website. |
|
http://www.metafilter.com/tags/union
(175 words)
|
|
| |
| | puml-list Mailing List: Tagged Values subset and union |
| | Dear all, I have a question concerning tagged values of associations in UML 2.0. | | | puml-list Mailing List: Tagged Values subset and union | | | Can someone give me a good example for using subset and union. |
|
http://www.cs.york.ac.uk/puml/puml-list-archive/0871.html
(80 words)
|
|
| |
| | All posts tagged with Times-Union Metafilter |
| | Please." A small town in Indiana doles out tough sentences and offers classes on the community's out of control drug problem. | | | 1 posts tagged with Times-Union (View a list of all available tags) | | | Twenty-year sentence for selling two Oxycontin pills "I want to be a good person." said Johnson. |
|
http://www.metafilter.com/tags/Times-Union
(98 words)
|
|
| |
| | Gimpel Software Bug1503.cpp |
| | 1503 a tagged union is not anonymous -- A tagged union without a declarator appeared within a struct/union declaration. | | | If you have comments or questions about this bug, please post them to our Discussion Forum |
|
http://www.gimpel.com/html/bugs/bug1503.htm
(51 words)
|
|
| |
| | Named (tagged) Union -- Examples |
| | Next: Anonymous Union Up: Data Aggregates Previous: Union |
|
http://www.cs.iupui.edu/~umurthy/cs265/notes/5-Functions/NamedUnion.html
(8 words)
|
|
| |
| | Hampton Union Local News: Man tagged for toll crash stable in ICU |
| | Cars were backed up for miles on the northbound side of Interstate 95 after a white Jeep Cherokee caused a five-car accident at the Hampton Toll Plaza on Friday night around 5 p.m. | | | HAMPTON — A Salem man remains in Exeter Hospital, suffering from multiple trauma, four days after allegedly causing a five-car accident at the Hampton toll booths on Interstate 95. | | | Hampton Union Local News: Man tagged for toll crash stable in ICU |
|
http://www.yorkweekly.com/2002news/hampton/h11_19b.htm
(386 words)
|
|
|
