1 files changed, 129 insertions, 0 deletions
diff --git a/vendor/github.com/authzed/cel-go/parser/input.go b/vendor/github.com/authzed/cel-go/parser/input.go
new file mode 100644
index 0000000..f9349a1
--- /dev/null
+++ b/vendor/github.com/authzed/cel-go/parser/input.go
@@ -0,0 +1,129 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package parser
+
+import (
+	antlr "github.com/antlr4-go/antlr/v4"
+
+	"github.com/authzed/cel-go/common/runes"
+)
+
+type charStream struct {
+	buf runes.Buffer
+	pos int
+	src string
+}
+
+// Consume implements (antlr.CharStream).Consume.
+func (c *charStream) Consume() {
+	if c.pos >= c.buf.Len() {
+		panic("cannot consume EOF")
+	}
+	c.pos++
+}
+
+// LA implements (antlr.CharStream).LA.
+func (c *charStream) LA(offset int) int {
+	if offset == 0 {
+		return 0
+	}
+	if offset < 0 {
+		offset++
+	}
+	pos := c.pos + offset - 1
+	if pos < 0 || pos >= c.buf.Len() {
+		return antlr.TokenEOF
+	}
+	return int(c.buf.Get(pos))
+}
+
+// LT mimics (*antlr.InputStream).LT.
+func (c *charStream) LT(offset int) int {
+	return c.LA(offset)
+}
+
+// Mark implements (antlr.CharStream).Mark.
+func (c *charStream) Mark() int {
+	return -1
+}
+
+// Release implements (antlr.CharStream).Release.
+func (c *charStream) Release(marker int) {}
+
+// Index implements (antlr.CharStream).Index.
+func (c *charStream) Index() int {
+	return c.pos
+}
+
+// Seek implements (antlr.CharStream).Seek.
+func (c *charStream) Seek(index int) {
+	if index <= c.pos {
+		c.pos = index
+		return
+	}
+	if index < c.buf.Len() {
+		c.pos = index
+	} else {
+		c.pos = c.buf.Len()
+	}
+}
+
+// Size implements (antlr.CharStream).Size.
+func (c *charStream) Size() int {
+	return c.buf.Len()
+}
+
+// GetSourceName implements (antlr.CharStream).GetSourceName.
+func (c *charStream) GetSourceName() string {
+	return c.src
+}
+
+// GetText implements (antlr.CharStream).GetText.
+func (c *charStream) GetText(start, stop int) string {
+	if stop >= c.buf.Len() {
+		stop = c.buf.Len() - 1
+	}
+	if start >= c.buf.Len() {
+		return ""
+	}
+	return c.buf.Slice(start, stop+1)
+}
+
+// GetTextFromTokens implements (antlr.CharStream).GetTextFromTokens.
+func (c *charStream) GetTextFromTokens(start, stop antlr.Token) string {
+	if start != nil && stop != nil {
+		return c.GetText(start.GetTokenIndex(), stop.GetTokenIndex())
+	}
+	return ""
+}
+
+// GetTextFromInterval implements (antlr.CharStream).GetTextFromInterval.
+func (c *charStream) GetTextFromInterval(i antlr.Interval) string {
+	return c.GetText(i.Start, i.Stop)
+}
+
+// String mimics (*antlr.InputStream).String.
+func (c *charStream) String() string {
+	return c.buf.Slice(0, c.buf.Len())
+}
+
+var _ antlr.CharStream = &charStream{}
+
+func newCharStream(buf runes.Buffer, desc string) antlr.CharStream {
+	return &charStream{
+		buf: buf,
+		src: desc,
+	}
+}