mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-04 20:20:19 +00:00
41 lines
1.3 KiB
Go
41 lines
1.3 KiB
Go
|
// Copyright (c) 2012-2022 The ANTLR Project. All rights reserved.
|
||
|
|
// Use of this file is governed by the BSD 3-clause license that
|
||
|
|
// can be found in the LICENSE.txt file in the project root.
|
||
|
|
|
||
|
|
package antlr
|
||
|
|
|
||
|
|
// RuleContext is a record of a single rule invocation. It knows
|
||
|
|
// which context invoked it, if any. If there is no parent context, then
|
||
|
|
// naturally the invoking state is not valid. The parent link
|
||
|
|
// provides a chain upwards from the current rule invocation to the root
|
||
|
|
// of the invocation tree, forming a stack.
|
||
|
|
//
|
||
|
|
// We actually carry no information about the rule associated with this context (except
|
||
|
|
// when parsing). We keep only the state number of the invoking state from
|
||
|
|
// the [ATN] submachine that invoked this. Contrast this with the s
|
||
|
|
// pointer inside [ParserRuleContext] that tracks the current state
|
||
|
|
// being "executed" for the current rule.
|
||
|
|
//
|
||
|
|
// The parent contexts are useful for computing lookahead sets and
|
||
|
|
// getting error information.
|
||
|
|
//
|
||
|
|
// These objects are used during parsing and prediction.
|
||
|
|
// For the special case of parsers, we use the struct
|
||
|
|
// [ParserRuleContext], which embeds a RuleContext.
|
||
|
|
//
|
||
|
|
// @see ParserRuleContext
|
||
|
|
type RuleContext interface {
|
||
|
|
RuleNode
|
||
|
|
|
||
|
|
GetInvokingState() int
|
||
|
|
SetInvokingState(int)
|
||
|
|
|
||
|
|
GetRuleIndex() int
|
||
|
|
IsEmpty() bool
|
||
|
|
|
||
|
|
GetAltNumber() int
|
||
|
|
SetAltNumber(altNumber int)
|
||
|
|
|
||
|
|
String([]string, RuleContext) string
|
||
|
|
}
|