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implements allow byref to work in params #21873 (#21875)

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This commit is contained in:
Juan M Gómez
2023-05-20 23:19:09 +01:00
committed by GitHub
parent 016aa1d98c
commit 44f059c75e
8 changed files with 76 additions and 52 deletions
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19
tests/cpp/tvirtual.nim
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@@ -8,6 +8,7 @@ hello boo
Const Message: hello world
NimPrinter: hello world
NimPrinterConstRef: hello world
NimPrinterConstRefByRef: hello world
'''
"""
@@ -22,6 +23,10 @@ NimPrinterConstRef: hello world
virtual void printConstRef(char* message, const int& flag) const {
std::cout << "Const Ref Message: " << message << std::endl;
}
virtual void printConstRef2(char* message, const int& flag) const {
std::cout << "Const Ref2 Message: " << message << std::endl;
}
};
""".}
@@ -34,10 +39,10 @@ type
CppPrinter {.importcpp, inheritable.} = object
NimPrinter {.exportc.} = object of CppPrinter
proc salute(self:FooPtr) {.virtual.} =
proc salute(self: FooPtr) {.virtual.} =
echo "hello foo"
proc salute(self:BooPtr) {.virtual.} =
proc salute(self: BooPtr) {.virtual.} =
echo "hello boo"
let foo = newCpp[Foo]()
@@ -50,19 +55,23 @@ boo.salute()
booAsFoo.salute()
let message = "hello world".cstring
proc printConst(self:CppPrinter, message:cstring) {.importcpp.}
proc printConst(self: CppPrinter, message: cstring) {.importcpp.}
CppPrinter().printConst(message)
#notice override is optional.
#Will make the cpp compiler to fail if not virtual function with the same signature if found in the base type
proc printConst(self:NimPrinter, message:cstring) {.virtual:"$1('2 #2) const override".} =
proc printConst(self: NimPrinter, message: cstring) {.virtual:"$1('2 #2) const override".} =
echo "NimPrinter: " & $message
proc printConstRef(self:NimPrinter, message:cstring, flag:int32) {.virtual:"$1('2 #2, const '3& #3 ) const override".} =
proc printConstRef(self: NimPrinter, message: cstring, flag: int32) {.virtual:"$1('2 #2, const '3& #3 ) const override".} =
echo "NimPrinterConstRef: " & $message
proc printConstRef2(self: NimPrinter, message: cstring, flag {.byref.}: int32) {.virtual:"$1('2 #2, const '3 #3 ) const override".} =
echo "NimPrinterConstRefByRef: " & $message
NimPrinter().printConst(message)
var val : int32 = 10
NimPrinter().printConstRef(message, val)
NimPrinter().printConstRef2(message, val)