Vendor main dependencies.

vendor/github.com/vulcand/route/parse.go

@@ -0,0 +1,47 @@
+package route
+
+import (
+	"fmt"
+
+	"github.com/vulcand/predicate"
+)
+
+// IsValid checks whether expression is valid
+func IsValid(expr string) bool {
+	_, err := parse(expr, &match{})
+	return err == nil
+}
+
+func parse(expression string, result *match) (matcher, error) {
+	p, err := predicate.NewParser(predicate.Def{
+		Functions: map[string]interface{}{
+			"Host":       hostTrieMatcher,
+			"HostRegexp": hostRegexpMatcher,
+
+			"Path":       pathTrieMatcher,
+			"PathRegexp": pathRegexpMatcher,
+
+			"Method":       methodTrieMatcher,
+			"MethodRegexp": methodRegexpMatcher,
+
+			"Header":       headerTrieMatcher,
+			"HeaderRegexp": headerRegexpMatcher,
+		},
+		Operators: predicate.Operators{
+			AND: newAndMatcher,
+		},
+	})
+	if err != nil {
+		return nil, err
+	}
+	out, err := p.Parse(expression)
+	if err != nil {
+		return nil, err
+	}
+	m, ok := out.(matcher)
+	if !ok {
+		return nil, fmt.Errorf("unknown result type: %T", out)
+	}
+	m.setMatch(result)
+	return m, nil
+}