org.antlr.v4.test.runtime.templates.SemPredEvalParser.2UnpredicatedAlts.stg Maven / Gradle / Ivy

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A collection of tests for ANTLR 4 Runtime libraries.

There is a newer version: 4.9.0

// We have n-2 predicates for n alternatives. pick first alt

TestType() ::= "Parser"

Options ::= [
	"Debug": true
]

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

Input() ::= "x; y"

Rule() ::= "s"

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

Errors() ::= <<
line 1:0 reportAttemptingFullContext d=0 (a), input='x'
line 1:0 reportAmbiguity d=0 (a): ambigAlts={1, 2}, input='x'
line 1:3 reportAttemptingFullContext d=0 (a), input='y'
line 1:3 reportAmbiguity d=0 (a): ambigAlts={1, 2}, input='y'<\n>
>>

grammar(grammarName) ::= <<
grammar ;



s : {} a ';' a; // do 2x: once in ATN, next in DFA
a : ID {}
  | ID {}
  | {}? ID {}
  ;
ID : 'a'..'z'+ ;
INT : '0'..'9'+;
WS : (' '|'\n') -> skip ;
>>