Implement querylang parser

1 files changed, 23 insertions, 0 deletions

diff --git a/pkg/query/errors.go b/pkg/query/errors.go
new file mode 100644
index 0000000..0a9664f
--- /dev/null
+++ b/pkg/query/errors.go
@@ -0,0 +1,23 @@
+package query
+
+import (
+	"errors"
+	"fmt"
+)
+
+var ErrQueryFormat = errors.New("Incorrect query format")
+var ErrDatetimeTokenParse = errors.New("Unrecognized format for datetime token")
+
+type TokenError struct {
+	got      Token
+	gotPrev  Token
+	wantPrev string
+}
+
+func (e *TokenError) Error() string {
+	if e.wantPrev != "" {
+		return fmt.Sprintf("Unexpected token: got %s, got previous %s want previous %s", e.got, e.gotPrev, e.wantPrev)
+	}
+
+	return fmt.Sprintf("Unexpected token: got %s, got previous %s", e.got, e.gotPrev)
+}