org.antlr.v4.test.runtime.templates.SemPredEvalParser.Order.stg Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of runtime-testsuite Show documentation

A collection of tests for ANTLR 4 Runtime libraries.

There is a newer version: 4.9.0

// Under new predicate ordering rules (see antlr/antlr4#29), the first
// alt with an acceptable config (unpredicated, or predicated and evaluates
// to true) is chosen.

TestType() ::= "Parser"

Options ::= [
	"Debug": false
]

Grammar ::= [
	"T": {}
]

Input() ::= "x y"

Rule() ::= "s"

Output() ::= <<
alt 1
alt 1<\n>
>>

Errors() ::= ""

grammar(grammarName) ::= <<
grammar ;
s : a {} a; // do 2x: once in ATN, next in DFA;
// action blocks lookahead from falling off of 'a'
// and looking into 2nd 'a' ref. !ctx dependent pred
a : ID {}
  | {}?  ID {}
  ;
ID : 'a'..'z'+ ;
INT : '0'..'9'+;
WS : (' '|'\n') -> skip ;
>>