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* tr/diff-words-test:
  t4034 (diff --word-diff): add a minimum Perl drier test vector
  t4034 (diff --word-diff): style suggestions
  userdiff: simplify word-diff safeguard
  t4034: bulk verify builtin word regex sanity
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Junio C Hamano committed Feb 10, 2011
2 parents fc180d9 + 5269edf commit 1bb4abe
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438 changes: 207 additions & 231 deletions t/t4034-diff-words.sh
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15 changes: 15 additions & 0 deletions t/t4034/bibtex/expect
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<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index 95cd55b..ddcba9b 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,9 +1,10 @@<RESET>
@article{aldous1987uie,<RESET>
title={{Ultimate instability of exponential back-off protocol for acknowledgment-based transmission control of random access communication channels}},<RESET>
author={Aldous, <RED>D.<RESET><GREEN>David<RESET>},
journal={Information Theory, IEEE Transactions on},<RESET>
volume={<RED>33<RESET><GREEN>Bogus.<RESET>},
number={<RED>2<RESET><GREEN>4<RESET>},
pages={219--223},<RESET>
year=<GREEN>1987,<RESET>
<GREEN> note={This is in fact a rather funny read since ethernet works well in practice. The<RESET> {<RED>1987<RESET><GREEN>\em pre} reference is the right one, however.<RESET>}<RED>,<RESET>
}<RESET>
10 changes: 10 additions & 0 deletions t/t4034/bibtex/post
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@@ -0,0 +1,10 @@
@article{aldous1987uie,
title={{Ultimate instability of exponential back-off protocol for acknowledgment-based transmission control of random access communication channels}},
author={Aldous, David},
journal={Information Theory, IEEE Transactions on},
volume={Bogus.},
number={4},
pages={219--223},
year=1987,
note={This is in fact a rather funny read since ethernet works well in practice. The {\em pre} reference is the right one, however.}
}
9 changes: 9 additions & 0 deletions t/t4034/bibtex/pre
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@@ -0,0 +1,9 @@
@article{aldous1987uie,
title={{Ultimate instability of exponential back-off protocol for acknowledgment-based transmission control of random access communication channels}},
author={Aldous, D.},
journal={Information Theory, IEEE Transactions on},
volume={33},
number={2},
pages={219--223},
year={1987},
}
36 changes: 36 additions & 0 deletions t/t4034/cpp/expect
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@@ -0,0 +1,36 @@
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index 23d5c8a..7e8c026 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,19 +1,19 @@<RESET>
Foo() : x(0<RED>&&1<RESET><GREEN>&42<RESET>) { <GREEN>bar(x);<RESET> }
cout<<"Hello World<RED>!<RESET><GREEN>?<RESET>\n"<<endl;
<GREEN>(<RESET>1<GREEN>) (<RESET>-1e10<GREEN>) (<RESET>0xabcdef<GREEN>)<RESET> '<RED>x<RESET><GREEN>y<RESET>'
[<RED>a<RESET><GREEN>x<RESET>] <RED>a<RESET><GREEN>x<RESET>-><RED>b a<RESET><GREEN>y x<RESET>.<RED>b<RESET><GREEN>y<RESET>
!<RED>a<RESET><GREEN>x<RESET> ~<RED>a a<RESET><GREEN>x x<RESET>++ <RED>a<RESET><GREEN>x<RESET>-- <RED>a<RESET><GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>/<RED>b a<RESET><GREEN>y x<RESET>%<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>+<RED>b a<RESET><GREEN>y x<RESET>-<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<<RED>b a<RESET><GREEN>y x<RESET>>><RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<RED>b a<RESET><GREEN>y x<RESET><=<RED>b a<RESET><GREEN>y x<RESET>><RED>b a<RESET><GREEN>y x<RESET>>=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>==<RED>b a<RESET><GREEN>y x<RESET>!=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>^<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>|<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>||<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>?<RED>b<RESET><GREEN>y<RESET>:z
<RED>a<RESET><GREEN>x<RESET>=<RED>b a<RESET><GREEN>y x<RESET>+=<RED>b a<RESET><GREEN>y x<RESET>-=<RED>b a<RESET><GREEN>y x<RESET>*=<RED>b a<RESET><GREEN>y x<RESET>/=<RED>b a<RESET><GREEN>y x<RESET>%=<RED>b a<RESET><GREEN>y x<RESET><<=<RED>b a<RESET><GREEN>y x<RESET>>>=<RED>b a<RESET><GREEN>y x<RESET>&=<RED>b a<RESET><GREEN>y x<RESET>^=<RED>b a<RESET><GREEN>y x<RESET>|=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>,y
<RED>a<RESET><GREEN>x<RESET>::<RED>b<RESET><GREEN>y<RESET>
19 changes: 19 additions & 0 deletions t/t4034/cpp/post
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Foo() : x(0&42) { bar(x); }
cout<<"Hello World?\n"<<endl;
(1) (-1e10) (0xabcdef) 'y'
[x] x->y x.y
!x ~x x++ x-- x*y x&y
x*y x/y x%y
x+y x-y
x<<y x>>y
x<y x<=y x>y x>=y
x==y x!=y
x&y
x^y
x|y
x&&y
x||y
x?y:z
x=y x+=y x-=y x*=y x/=y x%=y x<<=y x>>=y x&=y x^=y x|=y
x,y
x::y
19 changes: 19 additions & 0 deletions t/t4034/cpp/pre
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@@ -0,0 +1,19 @@
Foo():x(0&&1){}
cout<<"Hello World!\n"<<endl;
1 -1e10 0xabcdef 'x'
[a] a->b a.b
!a ~a a++ a-- a*b a&b
a*b a/b a%b
a+b a-b
a<<b a>>b
a<b a<=b a>b a>=b
a==b a!=b
a&b
a^b
a|b
a&&b
a||b
a?b:z
a=b a+=b a-=b a*=b a/=b a%=b a<<=b a>>=b a&=b a^=b a|=b
a,y
a::b
35 changes: 35 additions & 0 deletions t/t4034/csharp/expect
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@@ -0,0 +1,35 @@
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index 9106d63..dd5f421 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,18 +1,18 @@<RESET>
Foo() : x(0<RED>&&1<RESET><GREEN>&42<RESET>) { <GREEN>bar(x);<RESET> }
cout<<"Hello World<RED>!<RESET><GREEN>?<RESET>\n"<<endl;
<GREEN>(<RESET>1<GREEN>) (<RESET>-1e10<GREEN>) (<RESET>0xabcdef<GREEN>)<RESET> '<RED>x<RESET><GREEN>y<RESET>'
[<RED>a<RESET><GREEN>x<RESET>] <RED>a<RESET><GREEN>x<RESET>-><RED>b a<RESET><GREEN>y x<RESET>.<RED>b<RESET><GREEN>y<RESET>
!<RED>a<RESET><GREEN>x<RESET> ~<RED>a a<RESET><GREEN>x x<RESET>++ <RED>a<RESET><GREEN>x<RESET>-- <RED>a<RESET><GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>/<RED>b a<RESET><GREEN>y x<RESET>%<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>+<RED>b a<RESET><GREEN>y x<RESET>-<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<<RED>b a<RESET><GREEN>y x<RESET>>><RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<RED>b a<RESET><GREEN>y x<RESET><=<RED>b a<RESET><GREEN>y x<RESET>><RED>b a<RESET><GREEN>y x<RESET>>=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>==<RED>b a<RESET><GREEN>y x<RESET>!=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>^<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>|<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>||<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>?<RED>b<RESET><GREEN>y<RESET>:z
<RED>a<RESET><GREEN>x<RESET>=<RED>b a<RESET><GREEN>y x<RESET>+=<RED>b a<RESET><GREEN>y x<RESET>-=<RED>b a<RESET><GREEN>y x<RESET>*=<RED>b a<RESET><GREEN>y x<RESET>/=<RED>b a<RESET><GREEN>y x<RESET>%=<RED>b a<RESET><GREEN>y x<RESET><<=<RED>b a<RESET><GREEN>y x<RESET>>>=<RED>b a<RESET><GREEN>y x<RESET>&=<RED>b a<RESET><GREEN>y x<RESET>^=<RED>b a<RESET><GREEN>y x<RESET>|=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>,y
18 changes: 18 additions & 0 deletions t/t4034/csharp/post
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@@ -0,0 +1,18 @@
Foo() : x(0&42) { bar(x); }
cout<<"Hello World?\n"<<endl;
(1) (-1e10) (0xabcdef) 'y'
[x] x->y x.y
!x ~x x++ x-- x*y x&y
x*y x/y x%y
x+y x-y
x<<y x>>y
x<y x<=y x>y x>=y
x==y x!=y
x&y
x^y
x|y
x&&y
x||y
x?y:z
x=y x+=y x-=y x*=y x/=y x%=y x<<=y x>>=y x&=y x^=y x|=y
x,y
18 changes: 18 additions & 0 deletions t/t4034/csharp/pre
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@@ -0,0 +1,18 @@
Foo():x(0&&1){}
cout<<"Hello World!\n"<<endl;
1 -1e10 0xabcdef 'x'
[a] a->b a.b
!a ~a a++ a-- a*b a&b
a*b a/b a%b
a+b a-b
a<<b a>>b
a<b a<=b a>b a>=b
a==b a!=b
a&b
a^b
a|b
a&&b
a||b
a?b:z
a=b a+=b a-=b a*=b a/=b a%=b a<<=b a>>=b a&=b a^=b a|=b
a,y
10 changes: 10 additions & 0 deletions t/t4034/fortran/expect
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@@ -0,0 +1,10 @@
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index 87f0d0b..d308da2 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,5 +1,5 @@<RESET>
print *, "Hello World<RED>!<RESET><GREEN>?<RESET>"

DO10I = 1,10<RESET>
<RED>DO10I<RESET><GREEN>DO 10 I<RESET> = 1,10
<RED>DO10I<RESET><GREEN>DO 1 0 I<RESET> = 1,10
5 changes: 5 additions & 0 deletions t/t4034/fortran/post
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@@ -0,0 +1,5 @@
print *, "Hello World?"

DO10I = 1,10
DO 10 I = 1,10
DO 1 0 I = 1,10
5 changes: 5 additions & 0 deletions t/t4034/fortran/pre
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@@ -0,0 +1,5 @@
print *, "Hello World!"

DO10I = 1,10
DO10I = 1,10
DO10I = 1,10
8 changes: 8 additions & 0 deletions t/t4034/html/expect
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@@ -0,0 +1,8 @@
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index 8ca4aea..46921e5 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,3 +1,3 @@<RESET>
<tag <GREEN>newattr="newvalue"<RESET>><GREEN>added<RESET> content</tag>
<tag attr=<RED>"value"<RESET><GREEN>"newvalue"<RESET>><RED>content<RESET><GREEN>changed<RESET></tag>
<<RED>tag<RESET><GREEN>newtag<RESET>>content <RED>&entity;<RESET><GREEN>&newentity;<RESET><<RED>/tag<RESET><GREEN>/newtag<RESET>>
3 changes: 3 additions & 0 deletions t/t4034/html/post
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@@ -0,0 +1,3 @@
<tag newattr="newvalue">added content</tag>
<tag attr="newvalue">changed</tag>
<newtag>content &newentity;</newtag>
3 changes: 3 additions & 0 deletions t/t4034/html/pre
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@@ -0,0 +1,3 @@
<tag>content</tag>
<tag attr="value">content</tag>
<tag>content &entity;</tag>
36 changes: 36 additions & 0 deletions t/t4034/java/expect
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@@ -0,0 +1,36 @@
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index 23d5c8a..7e8c026 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,19 +1,19 @@<RESET>
Foo() : x(0<RED>&&1<RESET><GREEN>&42<RESET>) { <GREEN>bar(x);<RESET> }
cout<<"Hello World<RED>!<RESET><GREEN>?<RESET>\n"<<endl;
<GREEN>(<RESET>1<GREEN>) (<RESET>-1e10<GREEN>) (<RESET>0xabcdef<GREEN>)<RESET> '<RED>x<RESET><GREEN>y<RESET>'
[<RED>a<RESET><GREEN>x<RESET>] <RED>a<RESET><GREEN>x<RESET>-><RED>b a<RESET><GREEN>y x<RESET>.<RED>b<RESET><GREEN>y<RESET>
!<RED>a<RESET><GREEN>x<RESET> ~<RED>a a<RESET><GREEN>x x<RESET>++ <RED>a<RESET><GREEN>x<RESET>-- <RED>a<RESET><GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>/<RED>b a<RESET><GREEN>y x<RESET>%<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>+<RED>b a<RESET><GREEN>y x<RESET>-<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<<RED>b a<RESET><GREEN>y x<RESET>>><RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<RED>b a<RESET><GREEN>y x<RESET><=<RED>b a<RESET><GREEN>y x<RESET>><RED>b a<RESET><GREEN>y x<RESET>>=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>==<RED>b a<RESET><GREEN>y x<RESET>!=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>^<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>|<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>||<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>?<RED>b<RESET><GREEN>y<RESET>:z
<RED>a<RESET><GREEN>x<RESET>=<RED>b a<RESET><GREEN>y x<RESET>+=<RED>b a<RESET><GREEN>y x<RESET>-=<RED>b a<RESET><GREEN>y x<RESET>*=<RED>b a<RESET><GREEN>y x<RESET>/=<RED>b a<RESET><GREEN>y x<RESET>%=<RED>b a<RESET><GREEN>y x<RESET><<=<RED>b a<RESET><GREEN>y x<RESET>>>=<RED>b a<RESET><GREEN>y x<RESET>&=<RED>b a<RESET><GREEN>y x<RESET>^=<RED>b a<RESET><GREEN>y x<RESET>|=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>,y
<RED>a<RESET><GREEN>x<RESET>::<RED>b<RESET><GREEN>y<RESET>
19 changes: 19 additions & 0 deletions t/t4034/java/post
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@@ -0,0 +1,19 @@
Foo() : x(0&42) { bar(x); }
cout<<"Hello World?\n"<<endl;
(1) (-1e10) (0xabcdef) 'y'
[x] x->y x.y
!x ~x x++ x-- x*y x&y
x*y x/y x%y
x+y x-y
x<<y x>>y
x<y x<=y x>y x>=y
x==y x!=y
x&y
x^y
x|y
x&&y
x||y
x?y:z
x=y x+=y x-=y x*=y x/=y x%=y x<<=y x>>=y x&=y x^=y x|=y
x,y
x::y
19 changes: 19 additions & 0 deletions t/t4034/java/pre
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@@ -0,0 +1,19 @@
Foo():x(0&&1){}
cout<<"Hello World!\n"<<endl;
1 -1e10 0xabcdef 'x'
[a] a->b a.b
!a ~a a++ a-- a*b a&b
a*b a/b a%b
a+b a-b
a<<b a>>b
a<b a<=b a>b a>=b
a==b a!=b
a&b
a^b
a|b
a&&b
a||b
a?b:z
a=b a+=b a-=b a*=b a/=b a%=b a<<=b a>>=b a&=b a^=b a|=b
a,y
a::b
35 changes: 35 additions & 0 deletions t/t4034/objc/expect
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@@ -0,0 +1,35 @@
<BOLD>diff --git a/pre b/post<RESET>
<BOLD>index 9106d63..dd5f421 100644<RESET>
<BOLD>--- a/pre<RESET>
<BOLD>+++ b/post<RESET>
<CYAN>@@ -1,18 +1,18 @@<RESET>
Foo() : x(0<RED>&&1<RESET><GREEN>&42<RESET>) { <GREEN>bar(x);<RESET> }
cout<<"Hello World<RED>!<RESET><GREEN>?<RESET>\n"<<endl;
<GREEN>(<RESET>1<GREEN>) (<RESET>-1e10<GREEN>) (<RESET>0xabcdef<GREEN>)<RESET> '<RED>x<RESET><GREEN>y<RESET>'
[<RED>a<RESET><GREEN>x<RESET>] <RED>a<RESET><GREEN>x<RESET>-><RED>b a<RESET><GREEN>y x<RESET>.<RED>b<RESET><GREEN>y<RESET>
!<RED>a<RESET><GREEN>x<RESET> ~<RED>a a<RESET><GREEN>x x<RESET>++ <RED>a<RESET><GREEN>x<RESET>-- <RED>a<RESET><GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>*<RED>b a<RESET><GREEN>y x<RESET>/<RED>b a<RESET><GREEN>y x<RESET>%<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>+<RED>b a<RESET><GREEN>y x<RESET>-<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<<RED>b a<RESET><GREEN>y x<RESET>>><RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET><<RED>b a<RESET><GREEN>y x<RESET><=<RED>b a<RESET><GREEN>y x<RESET>><RED>b a<RESET><GREEN>y x<RESET>>=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>==<RED>b a<RESET><GREEN>y x<RESET>!=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>^<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>|<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>&&<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>||<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>?<RED>b<RESET><GREEN>y<RESET>:z
<RED>a<RESET><GREEN>x<RESET>=<RED>b a<RESET><GREEN>y x<RESET>+=<RED>b a<RESET><GREEN>y x<RESET>-=<RED>b a<RESET><GREEN>y x<RESET>*=<RED>b a<RESET><GREEN>y x<RESET>/=<RED>b a<RESET><GREEN>y x<RESET>%=<RED>b a<RESET><GREEN>y x<RESET><<=<RED>b a<RESET><GREEN>y x<RESET>>>=<RED>b a<RESET><GREEN>y x<RESET>&=<RED>b a<RESET><GREEN>y x<RESET>^=<RED>b a<RESET><GREEN>y x<RESET>|=<RED>b<RESET>
<RED>a<RESET><GREEN>y<RESET>
<GREEN>x<RESET>,y
18 changes: 18 additions & 0 deletions t/t4034/objc/post
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@@ -0,0 +1,18 @@
Foo() : x(0&42) { bar(x); }
cout<<"Hello World?\n"<<endl;
(1) (-1e10) (0xabcdef) 'y'
[x] x->y x.y
!x ~x x++ x-- x*y x&y
x*y x/y x%y
x+y x-y
x<<y x>>y
x<y x<=y x>y x>=y
x==y x!=y
x&y
x^y
x|y
x&&y
x||y
x?y:z
x=y x+=y x-=y x*=y x/=y x%=y x<<=y x>>=y x&=y x^=y x|=y
x,y
18 changes: 18 additions & 0 deletions t/t4034/objc/pre
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@@ -0,0 +1,18 @@
Foo():x(0&&1){}
cout<<"Hello World!\n"<<endl;
1 -1e10 0xabcdef 'x'
[a] a->b a.b
!a ~a a++ a-- a*b a&b
a*b a/b a%b
a+b a-b
a<<b a>>b
a<b a<=b a>b a>=b
a==b a!=b
a&b
a^b
a|b
a&&b
a||b
a?b:z
a=b a+=b a-=b a*=b a/=b a%=b a<<=b a>>=b a&=b a^=b a|=b
a,y
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