whatcanGOwrong

go/pkg/mod/github.com/cilium/ebpf@v0.11.0/cmd/bpf2go/flags.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"flag"
+	"go/build/constraint"
+)
+
+// buildTags is a comma-separated list of build tags.
+//
+// This follows the pre-Go 1.17 syntax and is kept for compatibility reasons.
+type buildTags struct {
+	Expr constraint.Expr
+}
+
+var _ flag.Value = (*buildTags)(nil)
+
+func (bt *buildTags) String() string {
+	if bt.Expr == nil {
+		return ""
+	}
+
+	return (bt.Expr).String()
+}
+
+func (bt *buildTags) Set(value string) error {
+	ct, err := constraint.Parse("// +build " + value)
+	if err != nil {
+		return err
+	}
+
+	bt.Expr = ct
+	return nil
+}
+
+func andConstraints(x, y constraint.Expr) constraint.Expr {
+	if x == nil {
+		return y
+	}
+
+	if y == nil {
+		return x
+	}
+
+	return &constraint.AndExpr{X: x, Y: y}
+}
+
+func orConstraints(x, y constraint.Expr) constraint.Expr {
+	if x == nil {
+		return y
+	}
+
+	if y == nil {
+		return x
+	}
+
+	return &constraint.OrExpr{X: x, Y: y}
+}