http://d.puremagic.com/issues/show_bug.cgi?id=5279
Summary: Function-static associative arrays
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P2
Component: DMD
AssignedTo: nob...@puremagic.com
ReportedBy: bearophile_h...@eml.cc
--- Comment #0 from bearophile_h...@eml.cc 2010-11-26 14:58:57 PST ---
I'd like DMD to support the definition of static associative arrays, that
become initialized only once at module start:
void foo() {
static string[string] map1 = ["bar" : "spam"];
static const string[string] map2 = ["bar" : "spam"];
static immutable string[string] map3 = ["bar" : "spam"];
}
void main() {}
That is similar to a static this() initialization of those maps, but with
visibility limited to foo().
--------------------------
Just for reference this is how DMD 2.050 compiles various kinds of AAs
literals, in all cases but fifth_function() the AA seems created again at each
function call (I think there is already a bug report about the enum AAs, but I
don't remember its number, please add it below if you remember it):
string first_function(string k) {
immutable string[string] map1 = ["bar" : "spam"];
return map1[k];
}
string second_function(string k) {
const string[string] map2 = ["bar" : "spam"];
return map2[k];
}
string third_function(string k) {
enum string[string] map3 = ["bar" : "spam"];
return map3[k];
}
string fourth_function(string k) {
static enum string[string] map4 = ["bar" : "spam"];
return map4[k];
}
immutable string[string] map5;
static this() {
map5 = ["bar" : "spam"];
}
string fifth_function(string k) {
return map5[k];
}
void main() {}
Compiled with:
DMD 2.050, -O -release -inline
_D5test314first_functionFAyaZAya comdat
L0: push EAX
mov EAX,offset FLAT:_D11TypeInfo_Aa6__initZ
mov ECX,offset FLAT:_D16TypeInfo_HAyayAa6__initZ
push dword ptr 0Ch[ESP]
push dword ptr 0Ch[ESP]
push 8
push EAX
push dword ptr FLAT:_DATA[01Ch]
push dword ptr FLAT:_DATA[018h]
push dword ptr FLAT:_DATA[0Ch]
push dword ptr FLAT:_DATA[08h]
push 1
push ECX
call near ptr __d_assocarrayliteralT
add ESP,018h
push EAX
call near ptr __aaGetRvalue
mov EDX,4[EAX]
mov EAX,[EAX]
add ESP,014h
pop ECX
ret 8
_D5test315second_functionFAyaZAya comdat
L0: push EAX
mov EAX,offset FLAT:_D11TypeInfo_Aa6__initZ
mov ECX,offset FLAT:_D17TypeInfo_HAyaxAya6__initZ
push dword ptr 0Ch[ESP]
push dword ptr 0Ch[ESP]
push 8
push EAX
push dword ptr FLAT:_DATA[01Ch]
push dword ptr FLAT:_DATA[018h]
push dword ptr FLAT:_DATA[0Ch]
push dword ptr FLAT:_DATA[08h]
push 1
push ECX
call near ptr __d_assocarrayliteralT
add ESP,018h
push EAX
call near ptr __aaGetRvalue
mov EDX,4[EAX]
mov EAX,[EAX]
add ESP,014h
pop ECX
ret 8
_D5test314third_functionFAyaZAya comdat
L0: push EAX
mov EAX,offset FLAT:_D11TypeInfo_Aa6__initZ
mov ECX,offset FLAT:_D16TypeInfo_HAyaAya6__initZ
push dword ptr 0Ch[ESP]
push dword ptr 0Ch[ESP]
push 8
push EAX
push dword ptr FLAT:_DATA[01Ch]
push dword ptr FLAT:_DATA[018h]
push dword ptr FLAT:_DATA[0Ch]
push dword ptr FLAT:_DATA[08h]
push 1
push ECX
call near ptr __d_assocarrayliteralT
add ESP,018h
push EAX
call near ptr __aaGetRvalue
mov EDX,4[EAX]
mov EAX,[EAX]
add ESP,014h
pop ECX
ret 8
_D5test315fourth_functionFAyaZAya comdat
L0: push EAX
mov EAX,offset FLAT:_D11TypeInfo_Aa6__initZ
mov ECX,offset FLAT:_D16TypeInfo_HAyaAya6__initZ
push dword ptr 0Ch[ESP]
push dword ptr 0Ch[ESP]
push 8
push EAX
push dword ptr FLAT:_DATA[01Ch]
push dword ptr FLAT:_DATA[018h]
push dword ptr FLAT:_DATA[0Ch]
push dword ptr FLAT:_DATA[08h]
push 1
push ECX
call near ptr __d_assocarrayliteralT
add ESP,018h
push EAX
call near ptr __aaGetRvalue
mov EDX,4[EAX]
mov EAX,[EAX]
add ESP,014h
pop ECX
ret 8
_D5test314fifth_functionFAyaZAya comdat
L0: push EAX
mov EAX,offset FLAT:_D11TypeInfo_Aa6__initZ
push dword ptr 0Ch[ESP]
push dword ptr 0Ch[ESP]
push 8
push EAX
push dword ptr _D5test34map5yHAyaAa
call near ptr __aaGetRvalue
mov EDX,4[EAX]
mov EAX,[EAX]
add ESP,014h
pop ECX
ret 8
--
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
