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* s-atacco.ads, a-direio.adb: Protect use of 'Constrained by warnings on/off, since this is an obsolescent feature, for which we now generate a warning. * sem_attr.adb (Analyze_Attribute, case Constrained): Issue warning if warning mode is set and obsolescent usage of this attribute occurs. (Resolve_Access, case 'Access): Note that GNAT uses the context type to disambiguate overloaded prefixes, in accordance with AI-235. GNAT code predates, and partly motivates, the adoption of the AI. Implement new Ada 2005 attribute Mod * exp_attr.adb (Expand_N_Attribute_Reference): Implement Ada 2005 attribute Mod. * par-ch4.adb (P_Name): In Ada 2005 mode, recognize new attribute Mod * snames.h, snames.ads, snames.adb: Add entry for No_Dependence for pragma restrictions. New entry for Ada 2005 attribute Mod. * par-prag.adb: Add recognition of new pragma Restrictions No_Dependence Recognize restriction No_Obsolescent_Features at parse time * bcheck.adb: Add circuitry for checking for consistency of No_Dependence restrictions. * lib-writ.ads, lib-writ.adb: Output new R lines for No_Dependence restrictions. * restrict.ads, restrict.adb: Add subprograms to deal with No_Dependence restrictions. * rtsfind.adb: Check that implicit with's do not violate No_Dependence restrictions. * sem_ch3.adb, sem_ch11.adb, sem_ch13.adb, lib-xref.adb, sem_attr.adb: Add check for new restriction No_Obsolescent_Features * scn.ads, prj-err.ads, prj-err.adb, ali-util.adb, gprep.adb: Add new dummy parameter to scng instantiation. Needed for new restriction No_Obsolescent_Features * scn.adb: (Obsolescent_Check): New procedure Needed for new restriction No_Obsolescent_Features * scng.ads, scng.adb: Always allow wide characters in Ada 2005 mode, as specified by AI-285, needed for implementation of AI-388 (adding greek pi to Ada.Numerics). Add new generic formal to scng, needed for new restriction No_Obsolescent_Features. * s-rident.ads: Add new restriction No_Obsolescent_Features. * ali.ads, ali.adb: Adjustments for reading new No_Dependence restrictions lines. (Scan_ALI): When finding an unexpected character on an R line, raise exception Bad_R_Line, instead of calling Fatal_Error, so that, when Ignore_Errors is True, default restrictions are set and scanning of the ALI file continues with the next line. Also, when Bad_R_Line is raised and Ignore_Errors is True, skip to the end of le line. * sem_ch10.adb: Check that explicit with's do not violate No_Dependence restrictions. (Install_Withed_Unit): Add code to implement AI-377 and diagnose illegal context clauses containing child units of instance. * sem_prag.adb: Processing and checking for new No_Dependence restrictions. (Analyze_Pragma, case Psect_Object): Call Check_Arg_Is_External_Name to analyze and check the External argument. * a-numeri.ads: Add greek letter pi as alternative spelling of Pi From-SVN: r92829
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