| 1 | ================================================================= |
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| 2 | Logtalk - Object oriented extension to Prolog |
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| 3 | Release 2.20.2 |
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| 4 | |
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| 5 | Copyright (c) 1998-2004 Paulo Moura. All Rights Reserved. |
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| 6 | ================================================================= |
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| 7 | |
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| 8 | |
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| 9 | Upgrading from Logtalk 1.x |
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| 10 | ========================== |
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| 11 | |
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| 12 | Logtalk 2.x is not compatible with programs written for version 1.x. |
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| 13 | However, you should be able to translate most programs to make them |
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| 14 | run under this new version. Most of the examples provided with previous |
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| 15 | versions have been rewritten to run under version 2.x. Use them as |
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| 16 | translation examples. |
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| 17 | |
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| 18 | |
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| 19 | Upgrading from a previous Logtalk 2.x version |
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| 20 | ============================================= |
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| 21 | |
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| 22 | If your Logtalk programs depend on some of the example files, it is |
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| 23 | advisable that you check your code against the new version before |
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| 24 | throwing away the older release. |
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| 25 | |
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| 26 | Logtalk source files will need to be recompiled because of the changes |
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| 27 | done in the version 2.5.0 to improve message sending performance. |
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| 28 | |
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| 29 | Logtalk version 2.7.0 provides the first cut of the Logtalk standard library. |
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| 30 | Most examples have been rewritten to take advantage of the library. |
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| 31 | |
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| 32 | Logtalk version 2.8.0 introduces a small change on the logtalk_compile/1-2 |
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| 33 | and logtalk_load/1-2 predicates that may imply updating your loader utility |
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| 34 | files: the first argument is now always a list of entities even if we want |
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| 35 | to compile or load a single entity. |
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| 36 | |
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| 37 | Logtalk version 2.9.0 changes compiled code functors postfixes from "_sdcl" |
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| 38 | and "_sdef" to "_idcl" and "_idef", implying recompilation of all objects, |
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| 39 | protocols, and categories. |
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| 40 | |
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| 41 | Logtalk version 2.10.0 changes some of the semantics of object dynamic |
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| 42 | predicates. See the release notes for a description of the changes. |
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| 43 | |
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| 44 | Logtalk version 2.14.4 removes the definition of the deprecated built-in |
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| 45 | predicate logtalk_version/3 (use current_logtalk_flag/3 instead). |
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| 46 | |
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| 47 | Logtalk version 2.14.5 changes compiled code in order to correct a bug |
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| 48 | where sending messages such as true/0 to an unknown object will succeeded |
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| 49 | instead of throwing the expected exception, implying recompilation of all |
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| 50 | objects, protocols, and categories. |
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| 51 | |
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| 52 | Logtalk version 2.14.7 changes compiled code in order to optimize the |
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| 53 | code generated by the compilation of dynamic predicate clauses. |
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| 54 | |
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| 55 | Logtalk version 2.15.0 changes the "authors" key in the directive info/1 to |
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| 56 | "author". All the XSLT, DTD, and XSD files have been update to conform to |
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| 57 | this change. If you use the directive info/1 in your programs, you will need |
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| 58 | to apply this change to take advantage of automatic generation of documenting |
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| 59 | files. |
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| 60 | |
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| 61 | Logtalk version 2.15.3 changes the format of the runtime entity tables, |
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| 62 | implying recompilation of all objects, protocols, and categories. |
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| 63 | |
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| 64 | Logtalk version 2.15.6 renamed the compiler option "named_anonymous_vars" to |
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| 65 | "underscore_vars" and changed the possible option values form "on/off" to |
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| 66 | "dont_care/singletons". |
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| 67 | |
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| 68 | Logtalk 2.16.0 improves support for the declaration and use of operators |
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| 69 | local to objects and categories. Recompilation of any objects and categories |
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| 70 | containing operator declarations is needed in order to take advantage of the |
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| 71 | improvements made. |
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| 72 | |
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| 73 | Logtalk 2.16.1 now checks for attempts to redefined built-in Logtalk control |
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| 74 | constructs when compiling source files. These checks may generate compilation |
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| 75 | errors on files containing bugs that are not detected on previous versions of |
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| 76 | the compiler. |
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| 77 | |
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| 78 | Logtalk version 2.16.2 changed the possible option values of the read-only |
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| 79 | compiler option "startup_message" to "none", "banner", and "flags". Default |
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| 80 | value is "flags" (print both banner and default flag values). |
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| 81 | |
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| 82 | Logtalk version 2.17.1 removes predicate nth/3 from library entities listp, |
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| 83 | list, and difflist (replaced by the predicates nth0/3 and nth1/3). |
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| 84 | |
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| 85 | Logtalk version 2.20.0 updates the semantics of the uses/1 entity directive |
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| 86 | to accept as argument a single object identifier (this change is needed in |
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| 87 | order to ensure compatibility with the new uses/2 predicate directive). |
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