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...Function::isVarArg() Driver code: val make_constant : unit -> llconstant t val make_global_variable : unit -> llglobalvariable t val make_function : unit -> llfunction t (* typesafe *) value_name (make_constant ());; value_name (make_global_variable ());; value_name (make_function ());; is_null (make_constant ());; is_declaration (make_global_variable ());; is_declaration (make_function ());; is_global_constant (make_global_variable ());; is_var_arg (make_function ());; (* type errors *) is_null (make_global_variable ());; is_null (make_function ());; is_declaration (make_constant ());;...

Hi Erick, On 2008-03-15, at 04:03, Erick Tryzelaar wrote: > I was talking to Gordon on #llvm earlier, and he challenged me with > coming up with a way to improve the ocaml binding's type safety. I > think I got an easy solution with phantom types. This could be a good step. I'm not sure I can predict all of the implications; I'd suggest you work up a proof of concept.

...nectionAdapters::Column def required? @required end end class ActiveRecord::ConnectionAdapters::PostgreSQLAdapter alias_method :_real_columns, :columns def columns( table_name, name=nil ) cols = _real_columns( table_name, name ) cols.each{ |col| sql = "select is_nullable from information_schema.columns where table_name=''#{table_name}'' and column_name=''#{col.name}''" col_is_required = nil log(sql, nil, @connection) { |connection| col_is_required = connection.query(sql)[0][0].downcase != ''yes'&...

I was talking to Gordon on #llvm earlier, and he challenged me with coming up with a way to improve the ocaml binding's type safety. We can't go letting haskell beat us now, can we? I think I got an easy solution with phantom types. For those who don't know what the problem is, the ocaml bindings share one type between whole class branches (like values). This means we need to downcast

...self.create_no_close_on_exit_flag { + GUESTFS_CREATE_NO_CLOSE_ON_EXIT + } else { + 0 + }; + flag + } +} + +impl Handle { + pub fn create() -> Result<Handle, &'static str> { + let g = unsafe { guestfs_create() }; + if g.is_null() { + Err(\"failed to create guestfs handle\") + } else { + Ok(Handle { g }) + } + } + + pub fn create_flags(flags: CreateFlags) -> Result<Handle, &'static str> { + let g = unsafe { guestfs_create_flags(flags.to_libc_int()...

...NullTerminatedIter<T> { + fn new(p: *const T) -> NullTerminatedIter<T> { + NullTerminatedIter{ p } + } +} + +impl<T: Copy + Clone> Iterator for NullTerminatedIter<T> { + type Item = T; + fn next(&mut self) -> Option<T> { + if self.p.is_null() { + None + } else { + let r = unsafe { *(self.p) }; + self.p = unsafe { self.p.offset(1) }; + Some(r) + } + } +} + fn arg_string_list (v: &Vec<String>) -> Vec<*const i8> { let length = v.len(); let mut w =...

...lue = [ `Value ] > type llconstant = [ llvalue | `Constant ] > type llglobalvalue = [ llvalue | `GlobalValue ] > type llglobalvariable = [ llglobalvalue | `GlobalVariable ] > type llfunction = [ llglobalvalue | `Function ] > > val value_name : [> `Value] t -> string > val is_null : [> `Constant] t -> bool > val is_declaration : [> `GlobalValue] t -> bool > val is_global_constant : [> `GlobalVariable] t -> bool > val is_var_arg : [> `Function] t -> bool Ah, I get it now. type b = [ a | `B ] is idiomatic type theoretician for b t is a sub...

...gt; <NA> 8 NA 3 10 1 <NA> <NA> 4 NA 4 10 1 <NA> <NA> 4 NA 5 2 1 <NA> <NA> 8 NA CHAR_OCTET_LENGTH ORDINAL_POSITION IS_NULLABLE ORDINAL 1 510 1 YES 1 2 NA 2 YES 2 3 NA 3 YES 3 4 NA 4 YES 4 5 NA 5 YES...

...TABLE_QUALIFIER TABLE_OWNER TABLE_NAME COLUMN_NAME DATA_TYPE [6] TYPE_NAME PRECISION LENGTH SCALE RADIX [11] NULLABLE REMARKS COLUMN_DEF SQL_DATA_TYPE SQL_DATETIME_SUB [16] CHAR_OCTET_LENGTH ORDINAL_POSITION IS_NULLABLE DISPLAY_SIZE FIELD_TYPE <0 rows> (or 0-length row.names) But there is no test table defined anywhere else but the X schema. If I do sqlSave(db,aDataFrame,"X.test",T,F), it says test already defined. If I change the aDataFrame to be different than the fields actua...

...u64]) + 'a>>, + >, } -impl Handle { - pub fn create() -> Result<Handle, error::Error> { +impl<'a> Handle<'a> { + pub fn create() -> Result<Handle<'a>, error::Error> { let g = unsafe { guestfs_create() }; if g.is_null() { Err(error::Error::Create) } else { - Ok(Handle { g }) + let callbacks = collections::HashMap::new(); + Ok(Handle { g, callbacks }) } } - pub fn create_flags(flags: CreateFlags) -> Result<Handle, error::Error> {...

...NullTerminatedIter{ p } + fn new(p: *const *const T) -> NullTerminatedIter<T> { + NullTerminatedIter { p } } } impl<T: Copy + Clone> Iterator for NullTerminatedIter<T> { - type Item = T; - fn next(&mut self) -> Option<T> { - if self.p.is_null() { + type Item = *const T; + fn next(&mut self) -> Option<*const T> { + let r = unsafe { *(self.p) }; + if r.is_null() { None } else { - let r = unsafe { *(self.p) }; self.p = unsafe { self.p.offset(1) };...

...mp;[u64]) + 'a>, + >, } -impl Handle { - pub fn create() -> Result<Handle, error::Error> { +impl<'a> Handle<'a> { + pub fn create() -> Result<Handle<'a>, error::Error> { let g = unsafe { guestfs_create() }; if g.is_null() { Err(error::Error::Create) } else { - Ok(Handle { g }) + let callbacks = collections::HashMap::new(); + Ok(Handle { g, callbacks }) } } - pub fn create_flags(flags: CreateFlags) -> Result<Handle, error::Error> {...

...-> acc, ? ? ? ? ? CONS(car, cdr) -> llength(cdr, acc + 1)) } The tail-recursion I get out of transforming this function looks like this: llength_tr <- function (llist, acc = 0) { ? ? .tailr_env <- rlang::get_env() ? ? callCC(function(escape) { ? ? ? ? repeat { ? ? ? ? ? ? if (!rlang::is_null(..match_env <- test_pattern(llist, ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NIL))) ? ? ? ? ? ? ? ? with(..match_env, escape(acc)) ? ? ? ? ? ? else if (!rlang::is_null(..match_env <- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?test_pattern(llist, CONS(car, cdr)))) ? ? ? ? ? ? ? ?...

...llength(cdr, acc + 1)) > } > > The tail-recursion I get out of transforming this function looks like this: > > llength_tr <- function (llist, acc = 0) { > ? ? .tailr_env <- rlang::get_env() > ? ? callCC(function(escape) { > ? ? ? ? repeat { > ? ? ? ? ? ? if (!rlang::is_null(..match_env <- test_pattern(llist, > ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NIL))) > ? ? ? ? ? ? ? ? with(..match_env, escape(acc)) > > ? ? ? ? ? ? else if (!rlang::is_null(..match_env <- > ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?test_pattern(llist, CONS(car,...

...> The tail-recursion I get out of transforming this function looks like > this: > > > > llength_tr <- function (llist, acc = 0) { > > .tailr_env <- rlang::get_env() > > callCC(function(escape) { > > repeat { > > if (!rlang::is_null(..match_env <- test_pattern(llist, > > NIL))) > > with(..match_env, escape(acc)) > > > > else if (!rlang::is_null(..match_env <- > > test...

...ented why it was changed. > > > +pub fn event_to_string(events: &[guestfs::Event]) -> Result<String, > error::Error> { > > + let bitmask = events_to_bitmask(events); > > + > > + let r = unsafe { guestfs_event_to_string(bitmask) }; > > + if r.is_null() { > > + Err(error::unix_error("event_to_string")) > > + } else { > > + let s = unsafe { ffi::CStr::from_ptr(r) }; > > + let s = s.to_str()?.to_string(); > > These two look like utils::char_ptr_to_string(). > > > diff --git...

Patch 9 is a kind of dumping ground of all kinds of stuff. It may be better to spend some time with git rebase -i trying to work this into more coherent patches. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live

On Fri, May 05, 2017 at 12:50:31PM +0300, Amir Goldstein wrote: > To complete the picture for folks not cc'ed on my patches, > xfs use case suggests there is also justification for the additional helpers: > > uuid_is_null() / uuid_equal() > guid_is_null() / guid_equal() The is_null is useful and I bet we'll find other instances. I'm not sure _equals really adds much value over the existing _cmp helpers, but on the other hand they are so trivial that we might as well add them. The other thing XFS has i...

...p() / uuid_copy() / uuid_to_bin() / etc > guid_cmp() / guid_copy() / guid_to_bin() / etc > > Correct? Christoph? > That looks right to me. To complete the picture for folks not cc'ed on my patches, xfs use case suggests there is also justification for the additional helpers: uuid_is_null() / uuid_equal() guid_is_null() / guid_equal() Cheers, Amir.

...th the SQL Server adapter and not issues with me :) 1) Fields are not properly setup with proper null settings (:null => true / false). I''m wondering if we need to update the def columns method in activerecord/lib/activerecord/connection_adapters/sqlserver_adapter.rb to include "IS_NULLABLE as NULL" in the sql we use to retrieve the columns so that the following line in schema_dumper.rb will work: "tbl.print ", :null => false" if !column.null". That''s a total guess and I''m new to Rails so am not exactly sure how to figure out if that...