| Number | 257
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| Category | errata
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| Synopsis | Should white space be allowed in hierarchical references?
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| State | lrmdraft
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| Class | errata-simple
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| Arrival-Date | Jan 12 2003
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| Originator | Shalom.Bresticker@motorola.com
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| Release | 2001b: 12.4, 12.5, A.Notes
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| Environment |
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| Description |
Current LRM prohibits white space in hierarchical references around the . , except after an escaped identifier. Is this necessary ? What about hierarchical references to an array instance? Are spaces allowed around and within the square brackets? |
| Fix |
Delete the restriction that hierarchical references may not contain spaces. Specifically: 1. In Syntax 12-7, DELETE the first and second footnotes ("The period in escaped_hierarchical_identifier and escaped_hierarchical_branch shall be preceded by white_space, but shall not be followed by white_space.", "The period (.) in simple_hierarchical_identifier and simple_hierarchical_branch shall not be preceded or followed by white_space.") 2. In Section 12.5, DELETE the following paragraph: "There shall be no spaces within the hierarchical name reference, except for escaped identifiers embedded in the hierarchical name reference, which are followed by separators composed of white space and a period-character." 3. In the NOTES following A.9.5, DELETE Notes 3 and 4. (These notes are the same as footnotes 1 and 2 in Syntax 12-7, quoted above.) |
| Audit-Trail |
From: "Brad Pierce" <Brad.Pierce@synopsys.com> To: <etf-bugs@boyd.com> Cc: Subject: Re: errata/257: Should white space be allowed in hierarchical references? Date: Sat, 3 May 2003 10:32:46 -0700 This issue asks whether it's necessary to prohibit white space around the '.' in an hierarchical identifier. I think so, else one couldn't convert an hierarchical identifier into a flattened pseudohierarchical identifer simply by putting a backslash in front of it. For example, f( m.x , m.y ) ---> f( \m.x , \m.y ) but not f( m . x , m . y ) ---> f( \m . x , \m . y ) From: Steven Sharp <sharp@cadence.com> To: etf-bugs@boyd.com, Brad.Pierce@synopsys.com Cc: Subject: Re: errata/257: Should white space be allowed in hierarchical references? Date: Sat, 3 May 2003 15:08:14 -0400 (EDT) > I think so, else one couldn't convert an hierarchical identifier > into a flattened pseudohierarchical identifer simply by putting > a backslash in front of it. For example, > > f( m.x , m.y ) ---> f( \m.x , \m.y ) > > but not > > f( m . x , m . y ) ---> f( \m . x , \m . y ) I don't understand your concern. The white space is not a significant part of the name. The reference "m . x" represents the same thing as "m.x". The spaces will presumably be discarded by the parser, producing the same internal representation for both textual variations of the name. There should be no problem generating "\m.x" for either one in your scheme. BTW, how is your scheme supposed to convert a name like "\m.x .y" to produce a legal name that is distinct from the converted form of "m.x.y"? Steven Sharp sharp@cadence.com From: Shalom.Bresticker@motorola.com To: Brad.Pierce@synopsys.com Cc: etf-bugs@boyd.com Subject: Re: errata/257: PROPOSAL - Should white space be allowed in hierarchical references? Date: Sat, 4 Oct 2003 20:14:17 +0200 (IST) I would prefer to keep this as a separate issue. Since we do no yet have a clear proposal for 37, please make a proposal for 257 to delete all the places that forbid such white space. I do not have web access or PDF or FM right now. Thanks, Shalom On Fri, 3 Oct 2003 Brad.Pierce@synopsys.com wrote: > Date: Fri, 3 Oct 2003 13:33:33 -0700 > From: Brad.Pierce@synopsys.com > To: etf-bugs@boyd.com > Subject: errata/257: PROPOSAL - Should white space be allowed in hierarchical references? > > Precedence: bulk > > Close as duplicate of issue 37. > http://boydtechinc.com/cgi-bin/issueproposal.pl?cmd=view&pr=257 > -- Shalom Bresticker Shalom.Bresticker@motorola.com Design & Reuse Methodology Tel: +972 9 9522268 Motorola Semiconductor Israel, Ltd. Fax: +972 9 9522890 POB 2208, Herzlia 46120, ISRAEL Cell: +972 50 441478 Fix replaced by Shalom.Bresticker@motorola.com on Mon Oct 27 09:03:28 2003 Delete the restriction that hierarchical references may not contain spaces. Specifically: 1. In Syntax 12-7, DELETE the first and second footnotes ("The period in escaped_hierarchical_identifier and escaped_hierarchical_branch shall be preceded by white_space, but shall not be followed by white_space.", "The period (.) in simple_hierarchical_identifier and simple_hierarchical_branch shall not be preceded or followed by white_space.") 2. In Section 12.5, DELETE the following paragraph: "There shall be no spaces within the hierarchical name reference, except for escaped identifiers embedded in the hierarchical name reference, which are followed by separators composed of white space and a period-character." 3. In the NOTES following A.9.5, DELETE Notes 3 and 4. (These notes are the same as footnotes 1 and 2 in Syntax 12-7, quoted above.) |
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