void ConstantExpression::onParse(AnalysisResultConstPtr ar,
FileScopePtr scope) {
ar->parseOnDemandByConstant(m_name);
}
ExpressionPtr UnaryOpExpression::preOptimize(AnalysisResultConstPtr ar) {
Variant value;
Variant result;
if (m_exp && ar->getPhase() >= AnalysisResult::FirstPreOptimize) {
if (m_op == T_UNSET) {
if (m_exp->isScalar() ||
(m_exp->is(KindOfExpressionList) &&
static_pointer_cast<ExpressionList>(m_exp)->getCount() == 0)) {
recomputeEffects();
return CONSTANT("null");
}
return ExpressionPtr();
}
}
if (m_op == T_ISSET && m_exp->is(KindOfExpressionList) &&
static_pointer_cast<ExpressionList>(m_exp)->getListKind() ==
ExpressionList::ListKindParam) {
ExpressionListPtr el(static_pointer_cast<ExpressionList>(m_exp));
result = true;
int i = 0, n = el->getCount();
for (; i < n; i++) {
ExpressionPtr e((*el)[i]);
if (!e || !e->isScalar() || !e->getScalarValue(value)) break;
if (!isset(value)) {
result = false;
}
}
if (i == n) {
return replaceValue(makeScalarExpression(ar, result));
}
} else if (m_op != T_ARRAY &&
m_exp &&
m_exp->isScalar() &&
m_exp->getScalarValue(value) &&
preCompute(value, result)) {
return replaceValue(makeScalarExpression(ar, result));
} else if (m_op == T_BOOL_CAST) {
switch (m_exp->getKindOf()) {
default: break;
case KindOfBinaryOpExpression: {
int op = static_pointer_cast<BinaryOpExpression>(m_exp)->getOp();
switch (op) {
case T_LOGICAL_OR:
case T_BOOLEAN_OR:
case T_LOGICAL_AND:
case T_BOOLEAN_AND:
case T_LOGICAL_XOR:
case T_INSTANCEOF:
case '<':
case T_IS_SMALLER_OR_EQUAL:
case '>':
case T_IS_GREATER_OR_EQUAL:
case T_IS_IDENTICAL:
case T_IS_NOT_IDENTICAL:
case T_IS_EQUAL:
case T_IS_NOT_EQUAL:
return m_exp;
}
break;
}
case KindOfUnaryOpExpression: {
int op = static_pointer_cast<UnaryOpExpression>(m_exp)->getOp();
switch (op) {
case T_BOOL_CAST:
case '!':
case T_ISSET:
case T_EMPTY:
case T_PRINT:
return m_exp;
}
break;
}
}
}
return ExpressionPtr();
}