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bind: support for ctors for named (basic) types 

Fixes #38.

Change-Id: Id2598e71f6c9912e42e9f4e562267b9dd6368805
This commit is contained in:
Sebastien Binet 2015-08-11 18:41:41 +02:00
parent 5d2cebb740
commit ef1162374e
1 changed files with 71 additions and 0 deletions
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71
bind/gencpy_type.go
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@ -190,8 +190,79 @@ func (g *cpyGen) genTypeInit(sym *symbol) {
)
g.impl.Indent()
genNargCheck := func(nargs int) {
g.impl.Printf("Py_ssize_t nkwds = (kwds != NULL) ? PyDict_Size(kwds) : 0;\n")
g.impl.Printf("Py_ssize_t nargs = (args != NULL) ? PySequence_Size(args) : 0;\n")
g.impl.Printf("if ((nkwds + nargs) > %d) {\n", nargs)
g.impl.Indent()
g.impl.Printf("PyErr_SetString(PyExc_TypeError, ")
g.impl.Printf("\"%s.__init__ takes at most %d argument(s)\");\n",
sym.goname,
nargs,
)
g.impl.Printf("goto cpy_label_%s_init_fail;\n", sym.cpyname)
g.impl.Outdent()
g.impl.Printf("}\n\n")
}
// FIXME(sbinet) handle slices, arrays and funcs
switch {
case sym.isBasic():
g.impl.Printf("static char *kwlist[] = {\n")
g.impl.Indent()
g.impl.Printf("%q,\n", "v")
g.impl.Printf("NULL\n")
g.impl.Outdent()
g.impl.Printf("};\n")
g.impl.Printf("PyObject *arg = NULL;\n\n")
genNargCheck(1)
g.impl.Printf("if (!PyArg_ParseTupleAndKeywords(args, kwds, ")
format := []string{"|O"}
addrs := []string{"&arg"}
g.impl.Printf("%q, kwlist, %s)) {\n",
strings.Join(format, ""),
strings.Join(addrs, ", "),
)
g.impl.Indent()
g.impl.Printf("goto cpy_label_%s_init_fail;\n", sym.cpyname)
g.impl.Outdent()
g.impl.Printf("}\n\n")
g.impl.Printf("if (arg != NULL) {\n")
g.impl.Indent()
bsym := g.pkg.syms.symtype(sym.GoType().Underlying())
g.impl.Printf(
"if (!%s(arg, &self->cgopy)) {\n",
bsym.py2c,
)
g.impl.Indent()
g.impl.Printf("Py_XDECREF(arg);\n")
g.impl.Printf("goto cpy_label_%s_init_fail;\n", sym.cpyname)
g.impl.Outdent()
g.impl.Printf("}\n\n")
g.impl.Outdent()
g.impl.Printf("}\n\n")
case sym.isArray():
case sym.isSlice():
case sym.isSignature():
default:
panic(fmt.Errorf(
"gopy: tp_init for %s not handled",
sym.gofmt(),
))
}
g.impl.Printf("return 0;\n")
g.impl.Outdent()
g.impl.Printf("\ncpy_label_%s_init_fail:\n", sym.cpyname)
g.impl.Indent()
g.impl.Printf("return -1;\n")
g.impl.Outdent()
g.impl.Printf("}\n\n")
}