add token value comparer to TokenBuilder (#112)

qb: add token value comparer to TokenBuilder

qb/token.go

@@ -22,51 +22,101 @@ func (t TokenBuilder) Eq() Cmp {
 	return t.cmp(eq, nil)
 }
 
+// EqValue produces token(column)=?
+func (t TokenBuilder) EqValue() Cmp {
+	return t.valueCmp(eq, "")
+}
+
 // EqNamed produces token(column)=token(?) with a custom parameter name.
 func (t TokenBuilder) EqNamed(names ...string) Cmp {
 	return t.cmp(eq, names)
 }
 
+// EqValueNamed produces token(column)=? with a custom parameter name.
+func (t TokenBuilder) EqValueNamed(name string) Cmp {
+	return t.valueCmp(eq, name)
+}
+
 // Lt produces token(column)<token(?).
 func (t TokenBuilder) Lt() Cmp {
 	return t.cmp(lt, nil)
 }
 
+// LtValue produces token(column)<?.
+func (t TokenBuilder) LtValue() Cmp {
+	return t.valueCmp(lt, "")
+}
+
 // LtNamed produces token(column)<token(?) with a custom parameter name.
 func (t TokenBuilder) LtNamed(names ...string) Cmp {
 	return t.cmp(lt, names)
 }
 
+// LtValueNamed produces token(column)<? with a custom parameter name.
+func (t TokenBuilder) LtValueNamed(name string) Cmp {
+	return t.valueCmp(lt, name)
+}
+
 // LtOrEq produces token(column)<=token(?).
 func (t TokenBuilder) LtOrEq() Cmp {
 	return t.cmp(leq, nil)
 }
 
+// LtOrEqValue produces token(column)<=?.
+func (t TokenBuilder) LtOrEqValue() Cmp {
+	return t.valueCmp(leq, "")
+}
+
 // LtOrEqNamed produces token(column)<=token(?) with a custom parameter name.
 func (t TokenBuilder) LtOrEqNamed(names ...string) Cmp {
 	return t.cmp(leq, names)
 }
 
+// LtOrEqValueNamed produces token(column)<=? with a custom parameter name.
+func (t TokenBuilder) LtOrEqValueNamed(name string) Cmp {
+	return t.valueCmp(leq, name)
+}
+
 // Gt produces token(column)>token(?).
 func (t TokenBuilder) Gt() Cmp {
 	return t.cmp(gt, nil)
 }
 
+// GtValue produces token(column)>?.
+func (t TokenBuilder) GtValue() Cmp {
+	return t.valueCmp(gt, "")
+}
+
 // GtNamed produces token(column)>token(?) with a custom parameter name.
 func (t TokenBuilder) GtNamed(names ...string) Cmp {
 	return t.cmp(gt, names)
 }
 
+// GtValueNamed produces token(column)>? with a custom parameter name.
+func (t TokenBuilder) GtValueNamed(name string) Cmp {
+	return t.valueCmp(gt, name)
+}
+
 // GtOrEq produces token(column)>=token(?).
 func (t TokenBuilder) GtOrEq() Cmp {
 	return t.cmp(geq, nil)
 }
 
+// GtOrEqValue produces token(column)>=?.
+func (t TokenBuilder) GtOrEqValue() Cmp {
+	return t.valueCmp(geq, "")
+}
+
 // GtOrEqNamed produces token(column)>=token(?) with a custom parameter name.
 func (t TokenBuilder) GtOrEqNamed(names ...string) Cmp {
 	return t.cmp(geq, names)
 }
 
+// GtOrEqValueNamed produces token(column)>=? with a custom parameter name.
+func (t TokenBuilder) GtOrEqValueNamed(name string) Cmp {
+	return t.valueCmp(geq, name)
+}
+
 func (t TokenBuilder) cmp(op op, names []string) Cmp {
 	s := names
 	if s == nil {
@@ -78,3 +128,14 @@ func (t TokenBuilder) cmp(op op, names []string) Cmp {
 		value:  Fn("token", s...),
 	}
 }
+
+func (t TokenBuilder) valueCmp(op op, name string) Cmp {
+	if name == "" {
+		name = "token"
+	}
+	return Cmp{
+		op:     op,
+		column: fmt.Sprint("token(", strings.Join(t, ","), ")"),
+		value:  param(name),
+	}
+}