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Add 10 non-overlapping ANTLR grammar examples with JUnit test #4893

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Add 10 non-overlapping ANTLR grammar examples with JUnit test
sumittlearnbay Oct 12, 2025
0ddda4b
updated code
sumittlearnbay Oct 12, 2025
7bb10e3
updated code
sumittlearnbay Oct 12, 2025
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7 changes: 7 additions & 0 deletions ...e-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/Arithmetic.g4
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grammar Arithmetic;
expr: expr op=('*'|'/') expr # MulDiv
| expr op=('+'|'-') expr # AddSub
| INT # Int
| '(' expr ')' # Parens ;
INT: [0-9]+;
WS: [ \t\r\n]+ -> skip;
11 changes: 11 additions & 0 deletions ...-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/BooleanExpr.g4
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grammar BooleanExpr;
expr: expr AND expr
| expr OR expr
| NOT expr
| '(' expr ')'
| BOOL ;
AND: 'AND';
OR: 'OR';
NOT: 'NOT';
BOOL: 'TRUE' | 'FALSE';
WS: [ \t\r\n]+ -> skip;
8 changes: 8 additions & 0 deletions ...-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/CSVFlexible.g4
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grammar CSVFlexible;
file: row+ ;
row: value (',' value)* NEWLINE ;
value: QUOTED | TEXT? ;
TEXT: ~[,"\r\n]+ ;
QUOTED: '"' (~["\r\n] | '""')* '"' ;
NEWLINE: '\r'? '\n' ;
WS: [ \t]+ -> skip ;
12 changes: 12 additions & 0 deletions ...-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/ChatCommand.g4
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grammar ChatCommand;

// Entry rule
command
: SLASH CMD (WS ARG)* EOF
;

// Lexer rules
SLASH : '/' ;
CMD : [a-zA-Z]+ ;
ARG : [a-zA-Z0-9@._-]+ ;
WS : [ \t\r\n]+ -> skip ;
15 changes: 15 additions & 0 deletions ...st/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/GrammarCompilationTest.java
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import org.antlr.v4.runtime.*;
import org.antlr.v4.runtime.tree.*;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

public class GrammarCompilationTest {

@Test
public void testArithmeticGrammarLoads() throws Exception {
ArithmeticLexer lexer = new ArithmeticLexer(CharStreams.fromString("3+4*5"));
ArithmeticParser parser = new ArithmeticParser(new CommonTokenStream(lexer));
ParseTree tree = parser.expr();
assertNotNull(tree, "Parse tree should not be null");
}
}
10 changes: 10 additions & 0 deletions ...ime-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/JSONMini.g4
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grammar JSONMini;
json: value ;
value: STRING | NUMBER | obj | array | 'true' | 'false' | 'null' ;
obj: '{' pair (',' pair)* '}' ;
pair: STRING ':' value ;
array: '[' value (',' value)* ']' ;
STRING: '"' (~["\\] | '\\' .)* '"' ;
NUMBER: '-'? INT ('.' [0-9]+)? ;
fragment INT: '0' | [1-9][0-9]* ;
WS: [ \t\r\n]+ -> skip ;
8 changes: 8 additions & 0 deletions ...e-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/MiniConfig.g4
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grammar MiniConfig;
config: (section | pair)* EOF;
section: '[' NAME ']' ;
pair: NAME '=' VALUE ;
NAME: [a-zA-Z_][a-zA-Z0-9_]* ;
VALUE: ~[\r\n#;]+ ;
WS: [ \t\r\n]+ -> skip ;
COMMENT: ('#'|';').*? -> skip ;
8 changes: 8 additions & 0 deletions ...testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/MiniMarkdown.g4
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grammar MiniMarkdown;
doc: (heading | bold | text)+ ;
heading: '#' WS? TEXT NL ;
bold: '**' TEXT '**' ;
text: TEXT NL? ;
TEXT: ~[\r\n#*]+ ;
WS: [ \t]+ -> skip ;
NL: '\r'? '\n' ;
12 changes: 12 additions & 0 deletions ...me-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/MiniQuery.g4
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grammar MiniQuery;
query: 'SELECT' columns 'FROM' table ('WHERE' condition)? EOF ;
columns: '*' | column (',' column)* ;
column: ID ;
table: ID ;
condition: column op value ;
op: '=' | '<' | '>' ;
value: STRING | NUMBER ;
ID: [a-zA-Z_][a-zA-Z0-9_]* ;
STRING: '\'' (~['\r\n])* '\'' ;
NUMBER: [0-9]+ ;
WS: [ \t\r\n]+ -> skip ;
5 changes: 5 additions & 0 deletions ...ime-testsuite/test/org/antlr/v4/test/runtime/grammers/antlr_grammars/grammars/UnitExpr.g4
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grammar UnitExpr;
expr: NUMBER UNIT ;
NUMBER: [0-9]+ ('.' [0-9]+)? ;
UNIT: [a-zA-Z/_]+ ;
WS: [ \t\r\n]+ -> skip ;
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