Thorsten Ottosen wrote:
"Jonathan Turkanis" <technews@kangaroologic.com> wrote in message
I definitely prefer "assign" to "assign_range". Could you say more explcitly what the ambiguity would be if you try to make assign and insert to too much work?
yes, the problem shows up when an implicit conversion from Derived* to Base* is needed and when another templated overload exists. The templated overload does not require any conversions and so is deemed a better match.
The attached code shows the problem.
I guess the problem could be removed with disable_if<>.
The attached version uses a similar idea, but should work on compilers without SFINAE. Jonathan begin 666 range.cpp M(VEN8VQU9&4@/'9E8W1O<CX-"B-I;F-L=61E(#QB;V]S="]T>7!E7W1R86ET M<R]I<U]P;VEN=&5R+FAP<#X-"B-I;F-L=61E(#QB;V]S="]S=&%T:6-?87-S M97)T+FAP<#X-"@T*=&5M<&QA=&4\8F]O;"!)<U!O:6YT97(^#0IS=')U8W0@ M:6YS97)T7VEM<&P[#0H-"G1E;7!L871E/#X-"G-T<G5C="!I;G-E<G1?:6UP M;#QT<G5E/B![#0H@(" @=&5M<&QA=&4\='EP96YA;64@0V]N=&%I;F5R+"!T M>7!E;F%M92!)=&5R871O<BP@='EP96YA;64@5#X-"B @("!S=&%T:6,@=F]I M9"!I;G-E<G0H0V]N=&%I;F5R)B!C;G0L($ET97)A=&]R(&ET+"!4*B!T*0T* M(" @('L-"@T*(" @('T-"GT[#0H-"@T*=&5M<&QA=&4\/@T*<W1R=6-T(&EN M<V5R=%]I;7!L/&9A;'-E/B![#0H@(" @=&5M<&QA=&4\='EP96YA;64@0V]N M=&%I;F5R+"!T>7!E;F%M92!)=&5R871O<BP@='EP96YA;64@4F%N9V4^#0H@ M(" @<W1A=&EC('9O:60@:6YS97)T*$-O;G1A:6YE<B8@8VYT+"!)=&5R871O M<B!I="P@8V]N<W0@4F%N9V4F('(I#0H@(" @>PT*(" @(" @("!"3T]35%]3 M5$%424-?05-315)4*"@@(6)O;W-T.CII<U]P;VEN=&5R/%)A;F=E/CHZ=F%L M=64@*2D[#0H@(" @?0T*?3L-"@T*=&5M<&QA=&4\(&-L87-S(%0@/@T*<W1R M=6-T(&YE=U]V96-T;W(-"GL-"B @("!T>7!E9&5F('-T9#HZ=F5C=&]R/%0J M/B @(" @(" @(" @("!T>7!E.PT*(" @('1Y<&5D968@='EP96YA;64@='EP M93HZ:71E<F%T;W(@(" @(&ET97)A=&]R.PT*#0H@(" @+R\@365R9V5D('=I M=&@@4F%N9V4@;W9E<FQO860N#0H@(" @+R]V;VED(&EN<V5R="@@:71E<F%T M;W(L(%0J("D-"B @(" O+WL-"B @(" O+WT-"@T*(" @('9O:60@:6YS97)T M*"!I=&5R871O<BP@5"8@*0T*(" @('L-"B @("!]#0H-"B @("!T96UP;&%T M93P@8VQA<W,@4F%N9V4@/@T*(" @('9O:60@:6YS97)T*"!I=&5R871O<B!I M="P@8V]N<W0@4F%N9V4F('(@*0T*(" @('L-"B @(" @(" @:6YS97)T7VEM M<&P\(&)O;W-T.CII<U]P;VEN=&5R/%)A;F=E/CHZ=F%L=64@/CHZ:6YS97)T M*"IT:&ES+"!I="P@<BD[#0H@(" @?0T*#0H@(" @:71E<F%T;W(@8F5G:6XH M*0T*(" @('L-"B @(" @(" @<F5T=7)N(&ET97)A=&]R*"D[#0H@(" @?0T* M?3L-"@T*<W1R=6-T($9O;PT*>PT*?3L-"@T*<W1R=6-T($)A<B Z($9O;PT* M>PT*?3L-"@T*=&5M<&QA=&4\(&-L87-S(%0L(&-L87-S(%4@/@T*=F]I9"!F M;V\H*0T*>PT*(" @(&YE=U]V96-T;W(\5#X@=CL-"B @("!V+FEN<V5R="@@ M=BYB96=I;B@I+"!N97<@52 I.R @(" -"B @("!V+FEN<V5R="@@=BYB96=I M;B@I+"!V("D[#0I]#0H-"FEN="!M86EN*"D-"GL-"@T*(" @(&9O;SQI;G0L M:6YT/B@I.R O+R!O:PT*(" @(&9O;SQ&;V\L1F]O/B@I.R O+R!O:PT*(" @
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