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On 09.09.2015 22:17, Guido van Rossum wrote:<br>
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cite="mid:CAP7+vJLLmQ8Ws4fBvzf97WLujxvY9DF+ngUAU68NF6pvTb2ttg@mail.gmail.com"
type="cite">
<div dir="ltr">Jukka wrote up a proposal for structural subtyping.
It's pretty good. Please discuss.<br>
<br>
<a moz-do-not-send="true"
href="https://github.com/ambv/typehinting/issues/11#issuecomment-138133867">https://github.com/ambv/typehinting/issues/11#issuecomment-138133867</a><br>
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<strong style="box-sizing: border-box; font-weight: bold; color:
rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe
UI', Arial, freesans, sans-serif; font-size: 14px; font-style:
normal; font-variant: normal; letter-spacing: normal; line-height:
22.3999996185303px; orphans: auto; text-align: start; text-indent:
0px; text-transform: none; white-space: normal; widows: 1;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);">15) How would<span
class="Apple-converted-space"> </span><code style="box-sizing:
border-box; font-family: Consolas, 'Liberation Mono', Menlo,
Courier, monospace; font-size: 11.8999996185303px; padding:
0.2em 0px; margin: 0px; border-radius: 3px; background-color:
rgba(0, 0, 0, 0.0392157);">Protocol</code><span
class="Apple-converted-space"> </span>be implemented?<br>
</strong><span style="box-sizing: border-box; color: rgb(51, 51,
51); font-family: 'Helvetica Neue',Helvetica,'Segoe
UI',Arial,freesans,sans-serif; font-size: 14px; font-style:
normal; font-variant: normal; letter-spacing: normal; line-height:
22.4px; text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 1; word-spacing: 0px;
background-color: rgb(255, 255, 255);">"Implement metaclass
functionality to detect whether a class is a protocol or not.
Maybe add a class attribute such as __protocol__ = True if that's
the case"<br>
</span><br>
If you consider the __protocols__ attribute I mentioned in an
earlier post, I would like to see <span style="box-sizing:
border-box; color: rgb(51, 51, 51); font-family: 'Helvetica
Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif; font-size:
14px; font-style: normal; font-variant: normal; letter-spacing:
normal; line-height: 22.4px; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 1;
word-spacing: 0px; background-color: rgb(255, 255, 255);">__protocol__</span>
renamed to <span style="box-sizing: border-box; color: rgb(51, 51,
51); font-family: 'Helvetica Neue',Helvetica,'Segoe
UI',Arial,freesans,sans-serif; font-size: 14px; font-style:
normal; font-variant: normal; letter-spacing: normal; line-height:
22.4px; text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 1; word-spacing: 0px;
background-color: rgb(255, 255, 255);">__is_protocol__</span>. I
think that would make it more readable in the long run.<br>
<br>
Best,<br>
Sven<br>
<span style="box-sizing: border-box; font-weight: bold; color:
rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe
UI', Arial, freesans, sans-serif; font-size: 14px; font-style:
normal; font-variant: normal; letter-spacing: normal; line-height:
22.3999996185303px; orphans: auto; text-align: start; text-indent:
0px; text-transform: none; white-space: normal; widows: 1;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);"></span>
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