Rename GinLogicValue to GinTernaryValue.

It's more descriptive. Also, get rid of the enum, and use #defines instead,
per Greg Stark's suggestion.

src/backend/access/gin/ginarrayproc.c

@@ -225,7 +225,7 @@ ginarrayconsistent(PG_FUNCTION_ARGS)
 Datum
 ginarraytriconsistent(PG_FUNCTION_ARGS)
 {
-	GinLogicValue *check = (GinLogicValue *) PG_GETARG_POINTER(0);
+	GinTernaryValue *check = (GinTernaryValue *) PG_GETARG_POINTER(0);
 	StrategyNumber strategy = PG_GETARG_UINT16(1);
 
 	/* ArrayType  *query = PG_GETARG_ARRAYTYPE_P(2); */
@@ -234,7 +234,7 @@ ginarraytriconsistent(PG_FUNCTION_ARGS)
 	/* Pointer	   *extra_data = (Pointer *) PG_GETARG_POINTER(4); */
 	/* Datum	   *queryKeys = (Datum *) PG_GETARG_POINTER(5); */
 	bool	   *nullFlags = (bool *) PG_GETARG_POINTER(6);
-	GinLogicValue	res;
+	GinTernaryValue res;
 	int32		i;
 
 	switch (strategy)
@@ -300,5 +300,5 @@ ginarraytriconsistent(PG_FUNCTION_ARGS)
 			res = false;
 	}
 
-	PG_RETURN_GIN_LOGIC_VALUE(res);
+	PG_RETURN_GIN_TERNARY_VALUE(res);
 }

src/backend/access/gin/ginget.c

@@ -873,7 +873,7 @@ keyGetItem(GinState *ginstate, MemoryContext tempCtx, GinScanKey key,
 	uint32		i;
 	bool		haveLossyEntry;
 	GinScanEntry entry;
-	GinLogicValue res;
+	GinTernaryValue res;
 	MemoryContext oldCtx;
 	bool		allFinished;
 

src/backend/access/gin/ginlogic.c

@@ -58,7 +58,7 @@ trueConsistentFn(GinScanKey key)
 	key->recheckCurItem = false;
 	return true;
 }
-static GinLogicValue
+static GinTernaryValue
 trueTriConsistentFn(GinScanKey key)
 {
 	return GIN_TRUE;
@@ -91,17 +91,18 @@ directBoolConsistentFn(GinScanKey key)
 /*
  * A helper function for calling a native ternary logic consistent function.
  */
-static GinLogicValue
+static GinTernaryValue
 directTriConsistentFn(GinScanKey key)
 {
-	return DatumGetGinLogicValue(FunctionCall7Coll(key->triConsistentFmgrInfo,
-										  key->collation,
-										  PointerGetDatum(key->entryRes),
-										  UInt16GetDatum(key->strategy),
-										  key->query,
-										  UInt32GetDatum(key->nuserentries),
-										  PointerGetDatum(key->extra_data),
-										  PointerGetDatum(key->queryValues),
+	return DatumGetGinTernaryValue(FunctionCall7Coll(
+									   key->triConsistentFmgrInfo,
+									   key->collation,
+									   PointerGetDatum(key->entryRes),
+									   UInt16GetDatum(key->strategy),
+									   key->query,
+									   UInt32GetDatum(key->nuserentries),
+									   PointerGetDatum(key->extra_data),
+									   PointerGetDatum(key->queryValues),
 									 PointerGetDatum(key->queryCategories)));
 }
 
@@ -113,15 +114,16 @@ directTriConsistentFn(GinScanKey key)
 static bool
 shimBoolConsistentFn(GinScanKey key)
 {
-	GinLogicValue result;
-	result = DatumGetGinLogicValue(FunctionCall7Coll(key->triConsistentFmgrInfo,
-										  key->collation,
-										  PointerGetDatum(key->entryRes),
-										  UInt16GetDatum(key->strategy),
-										  key->query,
-										  UInt32GetDatum(key->nuserentries),
-										  PointerGetDatum(key->extra_data),
-										  PointerGetDatum(key->queryValues),
+	GinTernaryValue result;
+	result = DatumGetGinTernaryValue(FunctionCall7Coll(
+										 key->triConsistentFmgrInfo,
+										 key->collation,
+										 PointerGetDatum(key->entryRes),
+										 UInt16GetDatum(key->strategy),
+										 key->query,
+										 UInt32GetDatum(key->nuserentries),
+										 PointerGetDatum(key->extra_data),
+										 PointerGetDatum(key->queryValues),
 									 PointerGetDatum(key->queryCategories)));
 	if (result == GIN_MAYBE)
 	{
@@ -147,7 +149,7 @@ shimBoolConsistentFn(GinScanKey key)
  *
  * NB: This function modifies the key->entryRes array!
  */
-static GinLogicValue
+static GinTernaryValue
 shimTriConsistentFn(GinScanKey key)
 {
 	int			nmaybe;
@@ -155,7 +157,7 @@ shimTriConsistentFn(GinScanKey key)
 	int			i;
 	bool		boolResult;
 	bool		recheck = false;
-	GinLogicValue curResult;
+	GinTernaryValue curResult;
 
 	/*
 	 * Count how many MAYBE inputs there are, and store their indexes in

src/backend/utils/adt/jsonb_gin.c

@@ -288,12 +288,12 @@ gin_consistent_jsonb(PG_FUNCTION_ARGS)
 Datum
 gin_triconsistent_jsonb(PG_FUNCTION_ARGS)
 {
-	GinLogicValue   *check = (GinLogicValue *) PG_GETARG_POINTER(0);
+	GinTernaryValue *check = (GinTernaryValue *) PG_GETARG_POINTER(0);
 	StrategyNumber strategy = PG_GETARG_UINT16(1);
 	/* Jsonb	   *query = PG_GETARG_JSONB(2); */
 	int32		nkeys = PG_GETARG_INT32(3);
 	/* Pointer	   *extra_data = (Pointer *) PG_GETARG_POINTER(4); */
-	GinLogicValue	res = GIN_TRUE;
+	GinTernaryValue res = GIN_TRUE;
 
 	int32		i;
 
@@ -366,7 +366,7 @@ gin_triconsistent_jsonb(PG_FUNCTION_ARGS)
 	else
 		elog(ERROR, "unrecognized strategy number: %d", strategy);
 
-	PG_RETURN_GIN_LOGIC_VALUE(res);
+	PG_RETURN_GIN_TERNARY_VALUE(res);
 }
 
 /*
@@ -414,12 +414,12 @@ gin_consistent_jsonb_hash(PG_FUNCTION_ARGS)
 Datum
 gin_triconsistent_jsonb_hash(PG_FUNCTION_ARGS)
 {
-	GinLogicValue   *check = (GinLogicValue *) PG_GETARG_POINTER(0);
+	GinTernaryValue *check = (GinTernaryValue *) PG_GETARG_POINTER(0);
 	StrategyNumber strategy = PG_GETARG_UINT16(1);
 	/* Jsonb	   *query = PG_GETARG_JSONB(2); */
 	int32		nkeys = PG_GETARG_INT32(3);
 	/* Pointer	   *extra_data = (Pointer *) PG_GETARG_POINTER(4); */
-	GinLogicValue	res = GIN_TRUE;
+	GinTernaryValue res = GIN_TRUE;
 	int32			i;
 	bool			has_maybe = false;
 
@@ -455,7 +455,7 @@ gin_triconsistent_jsonb_hash(PG_FUNCTION_ARGS)
 	if (!has_maybe && res == GIN_TRUE)
 		res = GIN_MAYBE;
 
-	PG_RETURN_GIN_LOGIC_VALUE(res);
+	PG_RETURN_GIN_TERNARY_VALUE(res);
 }
 
 Datum

src/backend/utils/adt/tsginidx.c

@@ -173,12 +173,12 @@ gin_extract_tsquery(PG_FUNCTION_ARGS)
 typedef struct
 {
 	QueryItem  *first_item;
-	GinLogicValue *check;
+	GinTernaryValue *check;
 	int		   *map_item_operand;
 	bool	   *need_recheck;
 } GinChkVal;
 
-static GinLogicValue
+static GinTernaryValue
 checkcondition_gin(void *checkval, QueryOperand *val)
 {
 	GinChkVal  *gcv = (GinChkVal *) checkval;
@@ -202,11 +202,11 @@ checkcondition_gin(void *checkval, QueryOperand *val)
  * checkval can be used to pass information to the callback. TS_execute doesn't
  * do anything with it.
  */
-static GinLogicValue
+static GinTernaryValue
 TS_execute_ternary(QueryItem *curitem, void *checkval,
-				   GinLogicValue (*chkcond) (void *checkval, QueryOperand *val))
+				   GinTernaryValue (*chkcond) (void *checkval, QueryOperand *val))
 {
-	GinLogicValue val1, val2, result;
+	GinTernaryValue val1, val2, result;
 	/* since this function recurses, it could be driven to stack overflow */
 	check_stack_depth();
 
@@ -297,14 +297,14 @@ gin_tsquery_consistent(PG_FUNCTION_ARGS)
 Datum
 gin_tsquery_triconsistent(PG_FUNCTION_ARGS)
 {
-	GinLogicValue *check = (GinLogicValue *) PG_GETARG_POINTER(0);
+	GinTernaryValue *check = (GinTernaryValue *) PG_GETARG_POINTER(0);
 
 	/* StrategyNumber strategy = PG_GETARG_UINT16(1); */
 	TSQuery		query = PG_GETARG_TSQUERY(2);
 
 	/* int32	nkeys = PG_GETARG_INT32(3); */
 	Pointer    *extra_data = (Pointer *) PG_GETARG_POINTER(4);
-	GinLogicValue res = GIN_FALSE;
+	GinTernaryValue res = GIN_FALSE;
 	bool		recheck;
 
 	/* The query requires recheck only if it involves weights */
@@ -332,7 +332,7 @@ gin_tsquery_triconsistent(PG_FUNCTION_ARGS)
 			res = GIN_MAYBE;
 	}
 
-	PG_RETURN_GIN_LOGIC_VALUE(res);
+	PG_RETURN_GIN_TERNARY_VALUE(res);
 }
 
 /*

src/include/access/gin.h

@@ -47,20 +47,22 @@ typedef struct GinStatsData
 	int32		ginVersion;
 } GinStatsData;
 
-/* ginlogic.c */
-enum GinLogicValueEnum
-{
-	GIN_FALSE = 0,			/* item is not present / does not match */
-	GIN_TRUE = 1,			/* item is present / matches */
-	GIN_MAYBE = 2			/* don't know if item is present / don't know if
-							 * matches */
-};
+/*
+ * A ternary value used by tri-consistent functions.
+ *
+ * For convenience, this is compatible with booleans. A boolean can be
+ * safely cast to a GinTernaryValue.
+ */
+typedef char GinTernaryValue;
 
-typedef char GinLogicValue;
+#define GIN_FALSE		0	/* item is not present / does not match */
+#define GIN_TRUE		1	/* item is present / matches */
+#define GIN_MAYBE		2	/* don't know if item is present / don't know if
+							 * matches */
 
-#define DatumGetGinLogicValue(X) ((GinLogicValue)(X))
-#define GinLogicValueGetDatum(X) ((Datum)(X))
-#define PG_RETURN_GIN_LOGIC_VALUE(x) return GinLogicValueGetDatum(x)
+#define DatumGetGinTernaryValue(X) ((GinTernaryValue)(X))
+#define GinTernaryValueGetDatum(X) ((Datum)(X))
+#define PG_RETURN_GIN_TERNARY_VALUE(x) return GinTernaryValueGetDatum(x)
 
 /* GUC parameter */
 extern PGDLLIMPORT int GinFuzzySearchLimit;

src/include/access/gin_private.h

@@ -763,7 +763,7 @@ typedef struct GinScanKeyData
 	/* array of check flags, reported to consistentFn */
 	bool	   *entryRes;
 	bool		(*boolConsistentFn) (GinScanKey key);
-	GinLogicValue (*triConsistentFn) (GinScanKey key);
+	GinTernaryValue (*triConsistentFn) (GinScanKey key);
 	FmgrInfo   *consistentFmgrInfo;
 	FmgrInfo   *triConsistentFmgrInfo;
 	Oid			collation;