expression.h: Fix signature of dmd::isLvalue

Author: ibuclaw

compiler/src/dmd/expression.h

@@ -61,7 +61,7 @@ namespace dmd
     Expression *optimize(Expression *exp, int result, bool keepLvalue = false);
     bool isIdentical(const Expression *exp, const Expression *e);
     bool equals(const Expression *exp, const Expression *e);
-    bool isLvalue(const Expression *exp);
+    bool isLvalue(Expression *exp);
     int32_t getFieldIndex(ClassReferenceExp *cre, Type *fieldtype, uint32_t fieldoffset);
     void fillTupleExpExps(TupleExp *te, TupleDeclaration *tup);
     Optional<bool> toBool(Expression *exp);

compiler/src/dmd/globals.h

@@ -232,6 +232,7 @@ struct Param
     FeatureState dtorFields;     // destruct fields of partially constructed objects
                                  // https://issues.dlang.org/show_bug.cgi?id=14246
     FeatureState systemVariables; // limit access to variables marked @system from @safe code
+    d_bool useFastDFA;             // Use fast data flow analysis engine
 
     CHECKENABLE useInvariants;     // generate class invariant checks
     CHECKENABLE useIn;             // generate precondition checks

compiler/src/tests/cxxfrontend.cc

@@ -1771,6 +1771,7 @@ void expression_h(Expression *e, Scope *sc, Type *t, Loc loc, Expressions *es)
     dmd::ctfeInterpret(e);
     dmd::expandTuples(es);
     dmd::optimize(e, 0);
+    dmd::isLvalue(e);
 }
 
 void hdrgen_h(Module *m, OutBuffer &buf, Modules &ms, ParameterList pl,