search for: nullability

In the language I am working on, there are cases where the call flow graph can affect the type of a variable. A simple example is a "nullable" type (a pointer which is allowed to be NULL), which can be converted into a non-nullable type via an if-test. So for example if x is nullable, and I test x != NULL, then inside the conditional block the type of x is no longer nullable.

On May 23, 2008, at 11:53 PM, Talin wrote: > In the language I am working on, there are cases where the call flow > graph can affect the type of a variable. Ok. > A simple example is a > "nullable" type (a pointer which is allowed to be NULL), which can be > converted into a non-nullable type via an if-test. So for example if x > is nullable, and I test x != NULL,

On May 24, 2008, at 02:53, Talin wrote: > In the language I am working on, there are cases where the call flow > graph can affect the type of a variable. A simple example is a > "nullable" type (a pointer which is allowed to be NULL), which can > be converted into a non-nullable type via an if-test. So for example > if x is nullable, and I test x != NULL, then

Thanks (everyone) for the suggestions, they were helpful. What I decided to do was to essentially "wrap" LLVM's BasicBlock structure with my own block class that contains additional high-level information. Up to this point I was generating LLVM basic blocks on the fly as I walked the statement tree; Now I build my own BB graph, and then use that to generate the BB graph for

Hi, after some experience with Rails on MySQL databases I gave it a try on one of our larger Oracle database. I was facing a problem when Rails tried to detect the columns for a model/table. The appropriate statement ran about 1 min which led to a timeout. Our Oracle guru told me to analyze the SYSTEM schema. After that hadn''t helped, he said the only remaining chance is to use a

I''m just looking into how to connect to Oracle using Rails. I''ve got everything connecting and working as it should. I have a Users table in Oracle: create_table "users", :force => true do |t| t.column "username", :string t.column "created_on", :datetime t.column "email", :string t.column "note", :text

Deniz wrote: > Hi Everybody, > I am a newbie in this list so please forgive me if this is a lengthy > message. > Currently I am working on a project at my work place that includes > viewing some oracle tables(I do not have control over to rewrite the > tables) and searching the tables based on a given criteria with Rails. > Up untill now everything was working great. The

Is there a way to use has_many and have it operate like such? select * from pages where site_id = #{id} or site_id is null I know there''s finder_sql, but then I''ll lose the find_in_collection goodness. Thanks, Joe -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the

Patches 1 & 2 are fine, ACK. I have a separate comment about patch 4 coming up. In libguestfs we handle optional args by putting them in a separate list (so instead of { args; ret } we have we have { args; optargs; ret }). This gets translated into a language like Python in the natural way. However for C it's translated into a varargs list with a rather complex system of flags, see:

I wanted to fix some things up in the trunk, so I set up the databases and ran the unit tests. A bunch fail for postgres, and even more error out. I know of two postgresql adapters: postgres-pr and ruby-postgres. Strangely, they each fail different tests. So if I want to fix things up, which one should I be using? For that matter, which adapter should I be using for production? Finding out

Dieter Menne pointed out that the (small) xml attachment didn't make it. Here is an in-line version (see end of message). Let's hope it works this time. I'm struggling with interpreting XML files created by ADODB as data.frames and I'm looking for advice. Note: This xlm contains a result set which comes from a rectangular data array. I've been trying to play with

Le''s say that I have a table called people and the column middle_name is nullable. If the user enters say blank or empty space then in the database it is recorded as empty space. I would like in all my models all empty spaces to be recorded as null. I guess I can write a plugin which will do so for all the models but I''m sure something like that should already be existing.I

I have a question about regarding the use of ''has_one'' in this scenario: Schema: User ---- id first_name last_name UserMessage ---- user_id message_id Message ---- id Assuming business rules dictate that a Message can have at most ONE User (let''s assume a message can be created without a user associated to it), these are my questions: 1) How would I use has_one

On Aug 13, 2007, at 9:20 PM, Talin wrote: > Hi, I spoke with you briefly after your talk at Google; I've since > been playing around with LLVM quite a bit and started working on a > front end for my experimental programming language, Tart. Cool, welcome :) > A couple of questions I wanted to ask (although feel free to answer > by saying "go ask on the mailing

Hi Folks, There is much discussion where I work at present regarding migrations, and the ''correct'' usage or not of them. TL;DR Should migrations be used just to modify schema, and other ''deploy'' tasks done other ways? If yes, how to ensure no repeat runs of such tasks (seeds, jobs etc) Background Once you''re live there are often additional things

All, I have need of getting at some underlying database metadata for ActiveRecord descendants. Does anyone know if I can get access to the following attributes of the underlying column for a given ActiveRecord object: Is it a currency object? Is it nullable? Is it a signed int? Is it searchable? Column length Column name Column precision Column scale Column data type - how specific can I get

I've been working some more on my front-end, incorporating the advice from your previous email. I've had some success, in that I can generate a Module object, populated it with functions and instructions, and print out the resulting LLVM IR. But I'm still a little puzzled on how to connect the front end with LLVM's backend code generator, I can't seem to figure out how to

...ny help, this looks like an amazing solution if it can get to work on all supported platforms. Kind regards, Peter Kriens $ /usr/local/Cellar/llvm/4.0.0_1/bin/clang \ -target x86_64-apple-darwin16.5.0 \ -Ienvs/x86_64/apple/macos/darwin/16.5.0/include \ -v \ -nostdinc \ -fPIC \ -c \ -Wno-nullability-completeness \ hello.c x.c $ file hello.o hello.o: Mach-O 64-bit object x86_64 $ /usr/local/Cellar/llvm/4.0.0_1/bin/ld.lld \ -flavor darwin \ -v \ -sdk_version 10.5.0 \ -demangle \ -arch x86_64 \ -undefined dynamic_lookup \ -dylib \ -dynamic \ -o libhello.dylib \ hello.o $ file libhel...

Howdy, I''m attempting my first rails test & I could use some help... I have the test posted at http://rafb.net/paste/results/YjWkIh45.html... when I run it, the test fails, but the db table is never restored & it seems that the fixtures file was never loaded... Any ideas as to what I''m doing wrong? Thanks! -- Posted via http://www.ruby-forum.com/.

Hi, I am running the RODBC examples form the help guide. I am trying to UPDATE a table in an Access data base but I am having an error. library(RODBC) library(termstrc) path = getwd() setwd(getwd()) dbName = "data.mdb" pathdbname = paste(path,"/",dbName,sep="") accesChannel = odbcConnectAccess(pathdbname, uid = "", pwd = "")