org.antlr.v4.test.runtime.templates.SemPredEvalParser.NoTruePredsThrowsNoViableAlt.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

// checks that we throw exception if all alts
// are covered with a predicate and none succeeds

TestType() ::= "Parser"

Options ::= [
	"Debug": false
]

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

Input() ::= "y 3 x 4"

Rule() ::= "s"

Output() ::= <<
>>

Errors() ::= <<
line 1:0 no viable alternative at input 'y'<\n>
>>

grammar(grammarName) ::= <<
grammar ;
s : a a;
a : {}? ID INT {}
  | {}? ID INT {}
  ;
ID : 'a'..'z'+ ;
INT : '0'..'9'+;
WS : (' '|'\n') -> skip ;
>>