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defcmp.pas, compare_paras:

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+ new flag cpo_generic to allow a declaration of a generic function in the interface to be matched to its implementation as for each new undefined defs for the type parameters will be created

git-svn-id: trunk@31594 -
This commit is contained in:
svenbarth 2015-09-11 13:42:51 +00:00
parent 65c37df999
commit 8fbd57080b
1 changed files with 44 additions and 1 deletions
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45
compiler/defcmp.pas
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@ -45,7 +45,9 @@ interface
cpo_ignorevarspez, // ignore parameter access type
cpo_ignoreframepointer, // ignore frame pointer parameter (for assignment-compatibility of global procedures to nested procvars)
cpo_compilerproc,
cpo_rtlproc
cpo_rtlproc,
cpo_generic // two different undefined defs (or a constraint in the forward) alone or in open arrays are
// treated as exactly equal (also in open arrays) if they are owned by their respective procdefs
);
tcompare_paras_options = set of tcompare_paras_option;
@ -1955,9 +1957,27 @@ implementation
function compare_paras(para1,para2 : TFPObjectList; acp : tcompare_paras_type; cpoptions: tcompare_paras_options):tequaltype;
var
currpara1,
currpara2 : tparavarsym;
function equal_genfunc_paradefs(def1,def2:tdef):boolean;
begin
result:=false;
if (sp_generic_para in def1.typesym.symoptions) and
(sp_generic_para in def2.typesym.symoptions) and
(def1.owner=currpara1.owner) and
(def2.owner=currpara2.owner) then
begin
{ the forward declaration may have constraints }
if not (df_genconstraint in def2.defoptions) and (def2.typ=undefineddef) and
((def1.typ=undefineddef) or (df_genconstraint in def1.defoptions)) then
result:=true;
end
end;
var
eq,lowesteq : tequaltype;
hpd : tprocdef;
convtype : tconverttype;
@ -2096,9 +2116,32 @@ implementation
Message2(type_w_procvar_univ_conflicting_para,currpara1.vardef.typename,currpara2.vardef.typename)
end;
end
else if (cpo_generic in cpoptions) then
begin
if equal_genfunc_paradefs(currpara1.vardef,currpara2.vardef) then
eq:=te_exact
else
exit;
end
else
exit;
end;
if (eq=te_equal) and
(cpo_generic in cpoptions) then
begin
if is_open_array(currpara1.vardef) and
is_open_array(currpara2.vardef) then
begin
if equal_genfunc_paradefs(tarraydef(currpara1.vardef).elementdef,tarraydef(currpara2.vardef).elementdef) then
eq:=te_exact;
end
else
{ for the purpose of forward declarations two equal specializations
are considered as exactly equal }
if tstoreddef(currpara1.vardef).is_specialization and
tstoreddef(currpara2.vardef).is_specialization then
eq:=te_exact;
end;
{ open strings can never match exactly, since you cannot define }
{ a separate "open string" type -> we have to be able to }
{ consider those as exact when resolving forward definitions. }