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5a66991bb3
updating the kubernetes release to the latest in main go.mod Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
41 lines
1.3 KiB
Go
41 lines
1.3 KiB
Go
// Copyright (c) 2012-2022 The ANTLR Project. All rights reserved.
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// Use of this file is governed by the BSD 3-clause license that
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// can be found in the LICENSE.txt file in the project root.
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package antlr
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// RuleContext is a record of a single rule invocation. It knows
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// which context invoked it, if any. If there is no parent context, then
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// naturally the invoking state is not valid. The parent link
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// provides a chain upwards from the current rule invocation to the root
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// of the invocation tree, forming a stack.
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//
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// We actually carry no information about the rule associated with this context (except
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// when parsing). We keep only the state number of the invoking state from
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// the [ATN] submachine that invoked this. Contrast this with the s
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// pointer inside [ParserRuleContext] that tracks the current state
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// being "executed" for the current rule.
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//
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// The parent contexts are useful for computing lookahead sets and
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// getting error information.
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//
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// These objects are used during parsing and prediction.
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// For the special case of parsers, we use the struct
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// [ParserRuleContext], which embeds a RuleContext.
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//
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// @see ParserRuleContext
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type RuleContext interface {
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RuleNode
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GetInvokingState() int
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SetInvokingState(int)
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GetRuleIndex() int
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IsEmpty() bool
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GetAltNumber() int
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SetAltNumber(altNumber int)
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String([]string, RuleContext) string
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}
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