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| author | Paul "LeoNerd" Evans <leonerd@leonerd.org.uk> | 2019-10-23 19:00:38 +0100 |
|---|---|---|
| committer | Paul "LeoNerd" Evans <leonerd@leonerd.org.uk> | 2019-12-09 23:19:05 +0000 |
| commit | 813e85a03dc214f719dc8248bda36156897b0757 (patch) | |
| tree | 9e3c12a41469a967477219e0d0a670ab593618d2 /opcode.h | |
| parent | e139e9c0aa8151ab29e98bb9f3216ee7a14abe4d (diff) | |
| download | perl-813e85a03dc214f719dc8248bda36156897b0757.tar.gz | |
Add the `isa` operator
Adds a new infix operator named `isa`, with the semantics that
$x isa SomeClass
is true if and only if `$x` is a blessed object reference that is either
`SomeClass` directly, or includes the class somewhere in its @ISA
hierarchy. It is false without warning or error for non-references or
non-blessed references.
This operator respects `->isa` method overloading, and is intended to
replace boilerplate code such as
use Scalar::Util 'blessed';
blessed($x) and $x->isa("SomeClass")
Diffstat (limited to 'opcode.h')
| -rw-r--r-- | opcode.h | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -543,6 +543,7 @@ EXTCONST char* const PL_op_name[] = { "lvrefslice", "lvavref", "anonconst", + "isa", "freed", }; #endif @@ -948,6 +949,7 @@ EXTCONST char* const PL_op_desc[] = { "lvalue ref assignment", "lvalue array reference", "anonymous constant", + "derived class test", "freed op", }; #endif @@ -1365,6 +1367,7 @@ EXT Perl_ppaddr_t PL_ppaddr[] /* or perlvars.h */ Perl_pp_lvrefslice, Perl_pp_lvavref, Perl_pp_anonconst, + Perl_pp_isa, } #endif #ifdef PERL_PPADDR_INITED @@ -1778,6 +1781,7 @@ EXT Perl_check_t PL_check[] /* or perlvars.h */ Perl_ck_null, /* lvrefslice */ Perl_ck_null, /* lvavref */ Perl_ck_null, /* anonconst */ + Perl_ck_isa, /* isa */ } #endif #ifdef PERL_CHECK_INITED @@ -2187,6 +2191,7 @@ EXTCONST U32 PL_opargs[] = { 0x00000440, /* lvrefslice */ 0x00000b40, /* lvavref */ 0x00000144, /* anonconst */ + 0x00000204, /* isa */ }; #endif @@ -2855,6 +2860,7 @@ EXTCONST I16 PL_op_private_bitdef_ix[] = { 233, /* lvrefslice */ 234, /* lvavref */ 0, /* anonconst */ + 12, /* isa */ }; @@ -2879,7 +2885,7 @@ EXTCONST U16 PL_op_private_bitdefs[] = { 0x0438, 0x1a50, 0x426c, 0x3d28, 0x3505, /* const */ 0x2fdc, 0x3659, /* gvsv */ 0x18b5, /* gv */ - 0x0067, /* gelem, lt, i_lt, gt, i_gt, le, i_le, ge, i_ge, eq, i_eq, ne, i_ne, ncmp, i_ncmp, slt, sgt, sle, sge, seq, sne, scmp, bit_and, bit_xor, bit_or, sbit_and, sbit_xor, sbit_or, smartmatch, lslice, xor */ + 0x0067, /* gelem, lt, i_lt, gt, i_gt, le, i_le, ge, i_ge, eq, i_eq, ne, i_ne, ncmp, i_ncmp, slt, sgt, sle, sge, seq, sne, scmp, bit_and, bit_xor, bit_or, sbit_and, sbit_xor, sbit_or, smartmatch, lslice, xor, isa */ 0x2fdc, 0x41b8, 0x03d7, /* padsv */ 0x2fdc, 0x41b8, 0x05b4, 0x30cc, 0x3ea9, /* padav */ 0x2fdc, 0x41b8, 0x05b4, 0x0650, 0x30cc, 0x3ea8, 0x2b41, /* padhv */ @@ -3348,6 +3354,7 @@ EXTCONST U8 PL_op_private_valid[] = { /* LVREFSLICE */ (OPpLVAL_INTRO), /* LVAVREF */ (OPpARG1_MASK|OPpPAD_STATE|OPpLVAL_INTRO), /* ANONCONST */ (OPpARG1_MASK), + /* ISA */ (OPpARG2_MASK), }; |