java - How to pass a many string different parse rule in ANTLR 4? -


i trying develop tool using antlr 4.0. new antlr , advance java. had downloaded package i.e antlr-4.2.2-complete.jar. antler working fine. have few doubts.

i took basic grammar , give below:

grammar test; start : (aa) | (bb); aa : c d; bb : c b; : 'a'; b : 'b'; c : 'c'; d : 'd'; ws : [ \t\r\n] ->skip; 

now using command prompt parse string in it..

c:\javalib\test>java org.antlr.v4.tool test.g4 c:\javalib\test>javac test*.java c:\javalib\test>java org.antlr.v4.runtime.misc.testrig test start -gui -tree **acb** ^z (start (bb c b)) 

string acb parsed , output obtained (start (bb c b)). now, want know how can parse manystrings/ file in antlr. each line in file have different start rule. example , file have parse (input file)

start : acb bb : acb aa : acd 

i can't take advice of changing grammar accordingly 1 start rule can used strings, because grammar on working vast.

i can change format of input string, can parse in antlr. wanted give basic idea, have many strings , each string have different start rule, how can parse in antlr.

to parse each line given rule this.

testcase :      singletest      ( linebreak singletest) *      ;  singletest:         'rulea' ':' rulea        | 'ruleb' ':' ruleb        |...       ;   whitespace: [ \t] -> skip; // no line break! linebreak: '\r\n' | '\r' | '\n'; 

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