Package org.antlr.v4.tool

Interface AttributeResolver

All Known Implementing Classes:

Alternative, Grammar, LeftRecursiveRule, LexerGrammar, Rule

public interface AttributeResolver

Grammars, rules, and alternatives all have symbols visible to actions. To evaluate attr exprs, ask action for its resolver then ask resolver to look up various symbols. Depending on the context, some symbols are available at some aren't. Alternative level: $x Attribute: rule arguments, return values, predefined rule prop. AttributeDict: references to tokens and token labels in the current alt (including any elements within subrules contained in that outermost alt). x can be rule with scope or a global scope. List label: x is a token/rule list label. $x.y Attribute: x is surrounding rule, rule/token/label ref $s::y Attribute: s is any rule with scope or global scope; y is prop within Rule level: $x Attribute: rule arguments, return values, predefined rule prop. AttributeDict: references to token labels in *any* alt. x can be any rule with scope or global scope. List label: x is a token/rule list label. $x.y Attribute: x is surrounding rule, label ref (in any alts) $s::y Attribute: s is any rule with scope or global scope; y is prop within Grammar level: $s AttributeDict: s is a global scope $s::y Attribute: s is a global scope; y is prop within

Method Summary

Modifier and Type	Method	Description
boolean	resolvesToAttributeDict(String x, ActionAST node)
boolean	resolvesToLabel(String x, ActionAST node)
boolean	resolvesToListLabel(String x, ActionAST node)
boolean	resolvesToToken(String x, ActionAST node)
Attribute	resolveToAttribute(String x, String y, ActionAST node)
Attribute	resolveToAttribute(String x, ActionAST node)

Method Detail

resolvesToListLabel

boolean resolvesToListLabel(String x,
                            ActionAST node)

resolvesToLabel

boolean resolvesToLabel(String x,
                        ActionAST node)

resolvesToAttributeDict

boolean resolvesToAttributeDict(String x,
                                ActionAST node)

resolvesToToken

boolean resolvesToToken(String x,
                        ActionAST node)

resolveToAttribute

Attribute resolveToAttribute(String x,
                             ActionAST node)

resolveToAttribute

Attribute resolveToAttribute(String x,
                             String y,
                             ActionAST node)