bool FunctionScope::outputCPPInvokeArgCountCheck(CodeGenerator &cg,
AnalysisResultPtr ar, bool ret, bool constructor) {
bool variable = isVariableArgument();
// system function has different handling of argument counts
bool system = (m_system || m_sep ||
cg.getOutput() == CodeGenerator::SystemCPP);
if (!system) {
ClassScopePtr scope = ar->getClassScope();
if (scope) system = (!scope->isUserClass() || scope->isExtensionClass() ||
scope->isSepExtension());
}
bool checkMissing = (m_minParam > 0);
bool checkTooMany = (!variable && (system ||
RuntimeOption::ThrowTooManyArguments));
const char *sysret = (system && ret) ? "return " : "";
const char *level = (system ? (constructor ? ", 2" : ", 1") : "");
bool guarded = system && (ret || constructor);
string fullname = getOriginalFullName();
if (checkMissing && checkTooMany) {
if (!variable && m_minParam == m_maxParam) {
cg_printf("if (count != %d)"
" %sthrow_wrong_arguments(\"%s\", count, %d, %d%s);\n",
m_minParam, sysret, fullname.c_str(), m_minParam, m_maxParam,
level);
} else {
cg_printf("if (count < %d || count > %d)"
" %sthrow_wrong_arguments(\"%s\", count, %d, %d%s);\n",
m_minParam, m_maxParam, sysret, fullname.c_str(),
m_minParam, variable ? -1 : m_maxParam, level);
}
} else if (checkMissing) {
cg_printf("if (count < %d)"
" %sthrow_missing_arguments(\"%s\", count+1%s);\n",
m_minParam, sysret, fullname.c_str(), level);
} else if (checkTooMany) {
cg_printf("if (count > %d)"
" %sthrow_toomany_arguments(\"%s\", %d%s);\n",
m_maxParam, sysret, fullname.c_str(), m_maxParam, level);
}
return guarded;
}
