Add 9 non-overlapping grammars and compilation test under antlr_grammars

Signed-off-by: sumittlearnbay <[email protected]>

Author: sumittlearnbay

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/Arithmetic.g4

@@ -0,0 +1,7 @@
+grammar Arithmetic;
+expr: expr op=('*'|'/') expr   # MulDiv
+    | expr op=('+'|'-') expr   # AddSub
+    | INT                      # Int
+    | '(' expr ')'             # Parens ;
+INT: [0-9]+;
+WS: [ \t\r\n]+ -> skip;

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/BooleanExpr.g4

@@ -0,0 +1,11 @@
+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;

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/CSVFlexible.g4

@@ -0,0 +1,8 @@
+grammar CSVFlexible;
+file: row+ ;
+row: value (',' value)* NEWLINE ;
+value: QUOTED | TEXT? ;
+TEXT: ~[,"\r\n]+ ;
+QUOTED: '"' (~["\r\n] | '""')* '"' ;
+NEWLINE: '\r'? '\n' ;
+WS: [ \t]+ -> skip ;

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/GrammarCompilationTest.java

@@ -0,0 +1,15 @@
+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");
+    }
+}

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/JSONMini.g4

@@ -0,0 +1,10 @@
+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 ;

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/MiniConfig.g4

@@ -0,0 +1,8 @@
+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 ;

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/MiniMarkdown.g4

@@ -0,0 +1,8 @@
+grammar MiniMarkdown;
+doc: (heading | bold | text)+ ;
+heading: '#' WS? TEXT NL ;
+bold: '**' TEXT '**' ;
+text: TEXT NL? ;
+TEXT: ~[\r\n#*]+ ;
+WS: [ \t]+ -> skip ;
+NL: '\r'? '\n' ;

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/MiniQuery.g4

@@ -0,0 +1,12 @@
+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 ;

runtime-testsuite/test/org/antlr/v4/test/runtime/antlr_grammars/grammars/UnitExpr.g4

@@ -0,0 +1,5 @@
+grammar UnitExpr;
+expr: NUMBER UNIT ;
+NUMBER: [0-9]+ ('.' [0-9]+)? ;
+UNIT: [a-zA-Z/_]+ ;
+WS: [ \t\r\n]+ -> skip ;