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[smlnj] Diff of /sml/trunk/HISTORY
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Diff of /sml/trunk/HISTORY

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revision 1629, Thu Sep 23 22:38:06 2004 UTC revision 1633, Tue Sep 28 03:08:33 2004 UTC
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14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16  Name: Matthias Blume (blume (at) tti - c (dot) org)  Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2004/09/27 22:08:00 CDT
18    Tag: blume-20040927-controls
19    Description:
20    
21    Added two pieces of functionality to the Controls interface:
22    
23    1.   val save'restore: 'a control -> unit -> unit
24    
25       grabs the current value of the control in stage 1 and restores it
26       in stage 2.
27    
28    2.   val set' : 'a control * 'a -> unit -> unit
29    
30       stores the given value into the control in stage 2 (i.e., delayed)
31       but does all error checking in stage 1.
32       (This is for string controls that need to do parse their argument --
33        something that might fail.  In some cases, notably in CM, one
34        already knows the intended argument but wants to delay the actual
35        assignment until a time when error recovery would be more difficult.)
36    
37    Changed the handling of controls in tool arguments to classes "sml" and
38    "lazysml":
39       - use Controls.save'restore as a more robust way of restoring the
40         old value (in particular: without having to re-parse the string)
41       - use controls to handle the "overload" keyword in the init group
42         (I believe this change actually fixes a long-standing obscure bug.)
43    
44    ----------------------------------------------------------------------
45    Name: Matthias Blume (blume (at) tti - c (dot) org)
46    Date: 2004/09/27 17:00:00 CDT
47    Tag: blume-20040927-lazysml
48    Description:
49    
50    Added a new tool class called "lazysml" to CM's tool chest.  The only
51    difference to "sml" is that compilation is done with Control.lazysml
52    set to true.  A source of class "lazysml" is automatically recognized
53    by a file name suffix of ".lml".
54    
55    In addition to the above feature, the original class "sml" now also
56    supports a tool argument "lazy" which has the same effect.  As a
57    result, the following three lines are equivalent:
58    
59        foo.sml : lazysml
60        foo.sml : sml (lazy)
61        foo.sml (lazy)
62    
63    The setting goes into effect both during parsing and during
64    compilation.  The original setting is restored right after parsing and
65    after compilation, respectively.
66    
67    In addition to all the above, there is also a general mechanism to set
68    ANY of the "controls" that are available at the command line via
69    "-C..." on a per-sml-file basis.  The same rules that apply for "lazy"
70    apply as well. (In fact, "lazy" is implemented as a special case of
71    the general mechanism.)
72    
73    The .cm file syntax uses a new keyword tool argument called "with".
74    There are several ways of indicating the desired settings:
75    
76        foo.sml (with:parser.quotations=true)
77        foo.sml (with:(name:parser.quotations value:true))
78        foo.sml (with:(name:name1 value:value1 name:name2 value:value2 ...))
79        foo.sml (with:(name1=value1 name2=value2 ...))
80        foo.sml (with:(name1=value1 name:name2 value:value2 name3=value3 ...))
81    
82        etc.
83    
84    Another possible abbreviation is to leave out the =v or value:v part
85    if the name refers to a boolean control (in which case the value is
86    taken to be true).  Thus, one could get lazy sml also by saying:
87    
88        foo.sml (with:parser.lazy-keyword=true)
89        foo.sml (with:parser.lazy-keyword)
90        foo.sml (with:(name:parser.lazy-keyword value:true))
91        foo.sml (with:(name:parser.lazy-keyword))
92    
93    ----------------------------------------------------------------------
94    Name: Matthias Blume (blume (at) tti - c (dot) org)
95    Date: 2004/09/24 16:22:00 CDT
96    Tag: blume-20040924-ppc-long-branch
97    Description:
98    
99    Turned message about "emiting long form of branch" off by default.
100    Added a control flag to turn it back on when desired.
101    
102    ----------------------------------------------------------------------
103    Name: Matthias Blume (blume (at) tti - c (dot) org)
104    Date: 2004/09/24 16:05:00 CDT
105    Tag: blume-20040924-rounding
106    Description:
107    
108    Applied patch for setting rounding modes under Mac OS X.  Thanks to
109    Melissa O'Neill for providing the code!
110    
111    ----------------------------------------------------------------------
112    Name: Matthias Blume (blume (at) tti - c (dot) org)
113  Date: 2004/09/23 17:30:00 CDT  Date: 2004/09/23 17:30:00 CDT
114  Tag: blume-20040923-envvars  Tag: blume-20040923-envvars
115  Description:  Description:

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