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Overview
| Comment: | TIP 346 does *not* have an implementation at all. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
b9ed34607038ccf6b406ef0573d9f58e |
| User & Date: | dkf 2019-06-08 12:51:21 |
Context
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2019-06-08
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| 14:15 | CFV by DKF: 461, 521, 528, 532, 536 check-in: baa2c94595 user: dkf tags: trunk | |
| 12:51 | TIP 346 does *not* have an implementation at all. check-in: b9ed346070 user: dkf tags: trunk | |
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2019-06-07
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| 17:09 | Formatting check-in: 24624b0ac3 user: jan.nijtmans tags: trunk | |
Changes
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"353":{"url":"./tip/353.md","tcl-ticket":"2823282","created":"29-Jul-2009","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 353: NR-enabled Expressions for Extensions","author":["Don Porter <[email protected]>"],"is-jest":false},
"352":{"url":"./tip/352.md","created":"14-Jul-2009","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 352: Tcl Style Guide","author":["Ray Johnson <[email protected]>","Donal K. Fellows <[email protected]>","Mark Janssen <[email protected]>"],"is-jest":false},
"351":{"url":"./tip/351.md","created":"09-Jul-2009","post-history":"","state":"Final","tcl-branch":"tip-351","tcl-version":"8.7","vote":"Done","type":"Project","title":"# TIP 351: Add Striding Support to lsearch","author":["Peter da Silva <[email protected]>","Donal K. Fellows <[email protected]>","Harald Oehlmann <[email protected]>","Andreas Leitgeb <[email protected]>"],"is-jest":false},
"350":{"url":"./tip/350.md","obsoletes":"308","created":"18-Apr-2009","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 350: Tcl Database Connectivity - Corrigenda","author":["Kevin B. Kenny <[email protected]>"],"is-jest":false},
"349":{"url":"./tip/349.md","created":"17-Apr-2009","post-history":"","state":"Draft","vote":"Pending","tcl-version":"8.7","type":"Project","title":"# TIP 349: New \"-cargo\" option for every Tk widget","author":["Zbigniew Baniewski <[email protected]>"],"is-jest":false},
"348":{"url":"./tip/348.md","tcl-ticket":"2868499","keywords":"Tcl,debugging","created":"26-Feb-2009","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 348: Substituted 'errorstack' / 'traceback'","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"347":{"url":"./tip/347.md","keywords":"Tcl","created":"09-Feb-2009","obsoleted-by":"395","post-history":"","state":"Withdrawn","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 347: Align 'string is ...' to Type-Conversion Functions in 'expr'","discussions-to":"news:comp.lang.tcl","author":["Jos Decoster <[email protected]>"],"is-jest":false},
"346":{"url":"./tip/346.md","tcl-ticket":"1665628","keywords":"Tcl,encoding,convertto,strict,Unicode,String,ByteArray","created":"02-Feb-2009","post-history":"","state":"Draft","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 346: Error on Failed String Encodings","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"345":{"url":"./tip/345.md","tcl-ticket":"2564363","keywords":"Tcl,encoding,invalid UTF-8","created":"05-Feb-2009","post-history":"","state":"Final","tcl-version":"8.7","vote":"Done","type":"Project","title":"# TIP 345: Kill the 'identity' Encoding","discussions-to":"Tcl Core List","author":["Alexandre Ferrieux <alexandre.ferrieux[email protected]>"],"is-jest":false},
"344":{"url":"./tip/344.md","created":"31-Dec-2008","post-history":"","state":"Draft","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 344: Bring TCP_NODELAY and SO_KEEPALIVE to socket options","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"343":{"url":"./tip/343.md","tcl-ticket":"2368084","keywords":"Tcl,binary","created":"03-Dec-2008","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 343: A Binary Specifier for [format/scan]","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"342":{"url":"./tip/342.md","keywords":"dictionary, default value","state":"Final","type":"Project","author":["Lars Hellström <[email protected]>"],"votes-for":"DKF, JN, DGP, SL, AK","votes-against":"none","created":"27-Nov-2008","title":"# TIP 342: Dict Get With Default","post-history":"","vote":"Done","tcl-version":"8.7","tcl-branch":"tip-342","votes-present":"FV","is-jest":false},
"341":{"url":"./tip/341.md","tcl-ticket":"2370575","keywords":"Tcl, set intersection","created":"27-Nov-2008","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 341: Multiple 'dict filter' Patterns","author":["Lars Hellström <[email protected]>"],"is-jest":false},
"340":{"url":"./tip/340.md","keywords":"Tcl_SetResult","created":"14-Nov-2008","post-history":"","state":"Withdrawn","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 340: Const Qualification of Tcl_SetResult's Argument","author":["Jan Nijtmans <[email protected].net>"],"is-jest":false},
"339":{"url":"./tip/339.md","created":"14-Nov-2008","post-history":"","state":"Rejected","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 339: Case-Insensitive Package Names","author":["Andreas Kupries <[email protected]>"],"is-jest":false},
................................................................................
"4":{"url":"./tip/4.md","created":"26-Oct-2000","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 4: Tcl Release and Distribution Philosophy","discussions-to":"news:comp.lang.tcl","author":["Brent Welch <[email protected]>","Donal K. Fellows <[email protected]>","Larry W. Virden <[email protected]>","Larry W. Virden <[email protected]>"],"is-jest":false},
"3":{"url":"./tip/3.md","created":"14-Sep-2000","obsoleted-by":"467","post-history":"","state":"Accepted","vote":"Done","type":"Process","title":"# TIP 3: TIP Format","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>"],"is-jest":false},
"2":{"url":"./tip/2.md","created":"12-Sep-2000","post-history":"","state":"Draft","vote":"Pending","type":"Process","title":"# TIP 2: TIP Guidelines","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>","Don Porter <[email protected]>","Mo DeJong <[email protected]>","Larry W. Virden <[email protected]>","Kevin Kenny <[email protected]>"],"is-jest":false},
"1":{"url":"./tip/1.md","created":"14-Sep-2000","obsoleted-by":"386","post-history":"","state":"Withdrawn","vote":"No voting","type":"Informational","title":"# TIP 1: TIP Index","author":["TIP Editor <[email protected]>"],"is-jest":false},
"0":{"url":"./tip/0.md","created":"11-Dec-2000","post-history":"","state":"Final","vote":"Done","type":"Process","title":"# TIP 0: Tcl Core Team Basic Rules","author":["John Ousterhout <[email protected]>"],"is-jest":false},
"@min": 0,
"@max": 549
}, "@timestamp": 1559927027}
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"353":{"url":"./tip/353.md","tcl-ticket":"2823282","created":"29-Jul-2009","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 353: NR-enabled Expressions for Extensions","author":["Don Porter <[email protected]>"],"is-jest":false},
"352":{"url":"./tip/352.md","created":"14-Jul-2009","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 352: Tcl Style Guide","author":["Ray Johnson <[email protected]>","Donal K. Fellows <[email protected]>","Mark Janssen <[email protected]>"],"is-jest":false},
"351":{"url":"./tip/351.md","created":"09-Jul-2009","post-history":"","state":"Final","tcl-branch":"tip-351","tcl-version":"8.7","vote":"Done","type":"Project","title":"# TIP 351: Add Striding Support to lsearch","author":["Peter da Silva <[email protected]>","Donal K. Fellows <[email protected]>","Harald Oehlmann <[email protected]>","Andreas Leitgeb <[email protected]>"],"is-jest":false},
"350":{"url":"./tip/350.md","obsoletes":"308","created":"18-Apr-2009","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 350: Tcl Database Connectivity - Corrigenda","author":["Kevin B. Kenny <[email protected]>"],"is-jest":false},
"349":{"url":"./tip/349.md","created":"17-Apr-2009","post-history":"","state":"Draft","vote":"Pending","tcl-version":"8.7","type":"Project","title":"# TIP 349: New \"-cargo\" option for every Tk widget","author":["Zbigniew Baniewski <[email protected]>"],"is-jest":false},
"348":{"url":"./tip/348.md","tcl-ticket":"2868499","keywords":"Tcl,debugging","created":"26-Feb-2009","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 348: Substituted 'errorstack' / 'traceback'","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"347":{"url":"./tip/347.md","keywords":"Tcl","created":"09-Feb-2009","obsoleted-by":"395","post-history":"","state":"Withdrawn","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 347: Align 'string is ...' to Type-Conversion Functions in 'expr'","discussions-to":"news:comp.lang.tcl","author":["Jos Decoster <[email protected]>"],"is-jest":false},
"346":{"url":"./tip/346.md","keywords":"Tcl,encoding,convertto,strict,Unicode,String,ByteArray","created":"02-Feb-2009","post-history":"","state":"Draft","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 346: Error on Failed String Encodings","author":["Alexandre Ferrieux <alexandre.fe[email protected]>"],"is-jest":false},
"345":{"url":"./tip/345.md","tcl-ticket":"2564363","keywords":"Tcl,encoding,invalid UTF-8","created":"05-Feb-2009","post-history":"","state":"Final","tcl-version":"8.7","vote":"Done","type":"Project","title":"# TIP 345: Kill the 'identity' Encoding","discussions-to":"Tcl Core List","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"344":{"url":"./tip/344.md","created":"31-Dec-2008","post-history":"","state":"Draft","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 344: Bring TCP_NODELAY and SO_KEEPALIVE to socket options","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"343":{"url":"./tip/343.md","tcl-ticket":"2368084","keywords":"Tcl,binary","created":"03-Dec-2008","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 343: A Binary Specifier for [format/scan]","author":["Alexandre Ferrieux <[email protected]>"],"is-jest":false},
"342":{"url":"./tip/342.md","keywords":"dictionary, default value","state":"Final","type":"Project","author":["Lars Hellström <[email protected]>"],"votes-for":"DKF, JN, DGP, SL, AK","votes-against":"none","created":"27-Nov-2008","title":"# TIP 342: Dict Get With Default","post-history":"","vote":"Done","tcl-version":"8.7","tcl-branch":"tip-342","votes-present":"FV","is-jest":false},
"341":{"url":"./tip/341.md","tcl-ticket":"2370575","keywords":"Tcl, set intersection","created":"27-Nov-2008","post-history":"","state":"Final","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 341: Multiple 'dict filter' Patterns","author":["Lars Hellström <[email protected]>"],"is-jest":false},
"340":{"url":"./tip/340.md","keywords":"Tcl_SetResult","created":"14-Nov-2008","post-history":"","state":"Withdrawn","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 340: Const Qualification of Tcl_SetResult's Argument","author":["Jan Nijtmans <[email protected]>"],"is-jest":false},
"339":{"url":"./tip/339.md","created":"14-Nov-2008","post-history":"","state":"Rejected","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 339: Case-Insensitive Package Names","author":["Andreas Kupries <[email protected]>"],"is-jest":false},
................................................................................
"4":{"url":"./tip/4.md","created":"26-Oct-2000","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 4: Tcl Release and Distribution Philosophy","discussions-to":"news:comp.lang.tcl","author":["Brent Welch <[email protected]>","Donal K. Fellows <[email protected]>","Larry W. Virden <[email protected]>","Larry W. Virden <[email protected]>"],"is-jest":false},
"3":{"url":"./tip/3.md","created":"14-Sep-2000","obsoleted-by":"467","post-history":"","state":"Accepted","vote":"Done","type":"Process","title":"# TIP 3: TIP Format","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>"],"is-jest":false},
"2":{"url":"./tip/2.md","created":"12-Sep-2000","post-history":"","state":"Draft","vote":"Pending","type":"Process","title":"# TIP 2: TIP Guidelines","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>","Don Porter <[email protected]>","Mo DeJong <[email protected]>","Larry W. Virden <[email protected]>","Kevin Kenny <[email protected]>"],"is-jest":false},
"1":{"url":"./tip/1.md","created":"14-Sep-2000","obsoleted-by":"386","post-history":"","state":"Withdrawn","vote":"No voting","type":"Informational","title":"# TIP 1: TIP Index","author":["TIP Editor <[email protected]>"],"is-jest":false},
"0":{"url":"./tip/0.md","created":"11-Dec-2000","post-history":"","state":"Final","vote":"Done","type":"Process","title":"# TIP 0: Tcl Core Team Basic Rules","author":["John Ousterhout <[email protected]>"],"is-jest":false},
"@min": 0,
"@max": 549
}, "@timestamp": 1559998244}
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Changes to index.md.
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</tr>
<tr class='state-draft type-project version-87'>
<td valign='top'><a href='./tip/346.md'>346</a></td>
<td valign='top'>Project</td>
<td valign='top'>8.7</td>
<td valign='top'>Draft</td>
<td valign='top' ><a href='./tip/346.md'>Error on Failed String Encodings</a></td>
<td valign='top'><a href='/tcl/tktview/1665628'>Link</a></td>
</tr>
<tr class='state-final type-project version-87'>
<td valign='top'><a href='./tip/345.md'>345</a></td>
<td valign='top'>Project</td>
<td valign='top'>8.7</td>
<td valign='top'>Final</td>
<td valign='top' ><a href='./tip/345.md'>Kill the 'identity' Encoding</a></td>
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1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 |
</tr> <tr class='state-draft type-project version-87'> <td valign='top'><a href='./tip/346.md'>346</a></td> <td valign='top'>Project</td> <td valign='top'>8.7</td> <td valign='top'>Draft</td> <td valign='top' ><a href='./tip/346.md'>Error on Failed String Encodings</a></td> <td></td> </tr> <tr class='state-final type-project version-87'> <td valign='top'><a href='./tip/345.md'>345</a></td> <td valign='top'>Project</td> <td valign='top'>8.7</td> <td valign='top'>Final</td> <td valign='top' ><a href='./tip/345.md'>Kill the 'identity' Encoding</a></td> |
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State: Draft Type: Project Vote: Pending Created: 02-Feb-2009 Post-History: Keywords: Tcl,encoding,convertto,strict,Unicode,String,ByteArray Tcl-Version: 8.7 Tcl-Ticket: 1665628 ----- # Abstract This TIP proposes to raise an error when an encoding-based conversion loses information. ................................................................................ Encoding-based conversions occur e.g. when writing a string to a channel. In doing so, Unicode characters are converted to sequences of bytes according to the channel's encoding. Similarly, a conversion can occur on request of the ByteArray internal representation of an object, the target encoding being ISO8859-1. In both cases, for some combinations of Unicode char and target encoding, the mapping is lossy \(non-injective\). For example, the "e acute" character, and many of its cousins, is mapped to a "?" in the 'ascii' target encoding. Also, Unicode chars above \\u00FF get 'projected' onto their low byte in the ISO8859-1 ByteArray conversion. This loss of information, in the first case, introduces unnoticed i18n mishandlings. In the second case, it makes it unreliable to do pure-ByteArray operations on objects unless they have no string representation. This induces unwanted and hard-to-debug performance hits on bytearray manipulations when people add debugging **puts**. # Proposed Change This TIP proposes to make this loss conspicuous. For the first use case, the idea is to introduce a **-strict** option to **encoding convertto**, that would raise an explicit error when non-mappable characters are met. Lossy conversions during channel I/O would also fail if a **-strictencoding true** [fconfigure option] is set. For the second case, we simply want the conversion to fail, like does the Listification of an ill-formed list. In both cases, the change consists of letting the proper internal conversion routine like **SetByteArrayFromAny** return TCL\_ERROR. # Rationale The second case does imply a Potential Incompatibility, since currently SBFA is documented to always return TCL\_OK. However, it is felt that virtually all cases that are sensitive to this, are actually half-working in a completely hidden manner. Hence the global effect is a healthy one. # Reference Example See Bug 1665628 <https://sourceforge.net/support/tracker.php?aid=1665628> . # Copyright This document has been placed in the public domain. |
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State: Draft Type: Project Vote: Pending Created: 02-Feb-2009 Post-History: Keywords: Tcl,encoding,convertto,strict,Unicode,String,ByteArray Tcl-Version: 8.7 ----- # Abstract This TIP proposes to raise an error when an encoding-based conversion loses information. ................................................................................ Encoding-based conversions occur e.g. when writing a string to a channel. In doing so, Unicode characters are converted to sequences of bytes according to the channel's encoding. Similarly, a conversion can occur on request of the ByteArray internal representation of an object, the target encoding being ISO8859-1. In both cases, for some combinations of Unicode char and target encoding, the mapping is lossy \(non-injective\). For example, the "`é`" character, and many of its cousins, is mapped to a "`?`" in the '**ascii**' target encoding. Also, Unicode chars above \\u00FF get 'projected' onto their low byte in the ISO8859-1 ByteArray conversion. This loss of information, in the first case, introduces unnoticed i18n mishandlings. In the second case, it makes it unreliable to do pure-ByteArray operations on objects unless they have no string representation. This induces unwanted and hard-to-debug performance hits on bytearray manipulations when people add debugging **puts**. # Proposed Change This TIP proposes to make this loss conspicuous. For the first use case, the idea is to introduce a **-strict** option to **encoding convertto**, that would raise an explicit error when non-mappable characters are met. Lossy conversions during channel I/O would also fail if a **-strictencoding true** [fconfigure] option is set. For the second case, we simply want the conversion to fail, like does the Listification of an ill-formed list. In both cases, the change consists of letting the proper internal conversion routine like **SetByteArrayFromAny** return TCL\_ERROR. # Rationale The second case does imply a Potential Incompatibility, since currently SBFA is documented to always return TCL\_OK. However, it is felt that virtually all cases that are sensitive to this, are actually half-working in a completely hidden manner. Hence the global effect is a healthy one. # Reference Example See [Bug 1665628](/tcl/tktview/1665628). # Copyright This document has been placed in the public domain. |