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* finer grained convert levels for strings, prefers widestring<->unicodestring over other conversions, resolves #18075

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git-svn-id: trunk@16460 -
This commit is contained in:
florian 2010-11-28 10:05:09 +00:00
parent b1a6ec532d
commit e4ecee317e
3 changed files with 50 additions and 5 deletions
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1
.gitattributes vendored
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@ -10767,6 +10767,7 @@ tests/webtbs/tw1798.pp svneol=native#text/plain
tests/webtbs/tw17986.pp svneol=native#text/pascal
tests/webtbs/tw17998.pp svneol=native#text/plain
tests/webtbs/tw18013.pp svneol=native#text/plain
tests/webtbs/tw18075.pp svneol=native#text/pascal
tests/webtbs/tw1820.pp svneol=native#text/plain
tests/webtbs/tw1825.pp svneol=native#text/plain
tests/webtbs/tw1850.pp svneol=native#text/plain

17
compiler/defcmp.pas
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@ -338,7 +338,8 @@ implementation
doconv:=tc_string_2_string;
{ Don't prefer conversions from widestring to a
normal string as we can loose information }
if tstringdef(def_from).stringtype in [st_widestring,st_unicodestring] then
if (tstringdef(def_from).stringtype in [st_widestring,st_unicodestring]) and
not (tstringdef(def_to).stringtype in [st_widestring,st_unicodestring]) then
eq:=te_convert_l3
else if tstringdef(def_to).stringtype in [st_widestring,st_unicodestring] then
eq:=te_convert_l2
@ -358,16 +359,22 @@ implementation
case tstringdef(def_from).stringtype of
st_widestring :
begin
{ Prefer conversions to ansistring }
if tstringdef(def_to).stringtype=st_ansistring then
{ Prefer conversions to unicodestring }
if tstringdef(def_to).stringtype=st_unicodestring then
eq:=te_convert_l1
{ else prefer conversions to ansistring }
else if tstringdef(def_to).stringtype=st_ansistring then
eq:=te_convert_l2
else
eq:=te_convert_l3;
end;
st_unicodestring :
begin
{ Prefer conversions to ansistring }
if tstringdef(def_to).stringtype=st_ansistring then
{ Prefer conversions to widestring }
if tstringdef(def_to).stringtype=st_widestring then
eq:=te_convert_l1
{ else prefer conversions to ansistring }
else if tstringdef(def_to).stringtype=st_ansistring then
eq:=te_convert_l2
else
eq:=te_convert_l3;

37
tests/webtbs/tw18075.pp Normal file
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@ -0,0 +1,37 @@
{$codepage UTf8}
Var cad1:unicodeString;
cad2:Widestring;
n:integer;
Begin
cad1:='犮犯狃狄狪独';
cad2:=cad1;
//Unicodestring, 1 character is ok
Writeln('unicodestring');
n:=pos('犮',cad1);
Writeln(n);
if n<>1 then
halt(1);
Writeln('widestring');
n:=pos('犮',cad2);
Writeln(n);
if n<>1 then
halt(1);
//Unicodestring, more charactere wrong
Writeln('unicodestring');
n:=pos('狃狄',cad1);
Writeln(n); //show position 0
if n<>3 then
halt(1);
Writeln('widestring');
n:=pos('狃狄',cad2); //Is correct position 3
Writeln(n);
if n<>3 then
halt(1);
Writeln('ok');
End.