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mode wasn't working as lexer command

This commit is contained in:
Terence Parr 2012-02-13 11:45:10 -08:00
parent ebb8b3a15b
commit 97ab2c42da
2 changed files with 39 additions and 2 deletions
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9
tool/src/org/antlr/v4/parse/ANTLRParser.g
View File

@ -642,8 +642,8 @@ lexerCommands
; ;
lexerCommand lexerCommand
: id LPAREN lexerCommandExpr RPAREN -> ^(LEXER_ACTION_CALL id lexerCommandExpr) : lexerCommandName LPAREN lexerCommandExpr RPAREN -> ^(LEXER_ACTION_CALL lexerCommandName lexerCommandExpr)
| id | lexerCommandName
; ;
lexerCommandExpr lexerCommandExpr
@ -651,6 +651,11 @@ lexerCommandExpr
| INT | INT
; ;
lexerCommandName
: id
| MODE ->ID[$MODE]
;
altList altList
: alternative (OR alternative)* -> alternative+ : alternative (OR alternative)* -> alternative+
; ;

32
tool/test/org/antlr/v4/test/TestLexerExec.java
View File

@ -119,6 +119,38 @@ public class TestLexerExec extends BaseTest {
assertEquals(expecting, found); assertEquals(expecting, found);
} }
@Test public void testLexerPushPopModeAction() throws Exception {
String grammar =
"lexer grammar L;\n" +
"STRING_START : '\"' -> pushMode(STRING_MODE), more ;\n" +
"WS : (' '|'\n') -> skip ;\n"+
"mode STRING_MODE;\n"+
"STRING : '\"' -> popMode ;\n"+
"ANY : . -> more ;\n";
String found = execLexer("L.g", grammar, "L", "\"abc\" \"ab\"");
String expecting =
"[@0,0:4='\"abc\"',<5>,1:0]\n" +
"[@1,6:9='\"ab\"',<5>,1:6]\n" +
"[@2,10:9='<EOF>',<-1>,1:10]\n";
assertEquals(expecting, found);
}
@Test public void testLexerModeAction() throws Exception {
String grammar =
"lexer grammar L;\n" +
"STRING_START : '\"' -> mode(STRING_MODE), more ;\n" +
"WS : (' '|'\n') -> skip ;\n"+
"mode STRING_MODE;\n"+
"STRING : '\"' -> mode(DEFAULT_MODE) ;\n"+
"ANY : . -> more ;\n";
String found = execLexer("L.g", grammar, "L", "\"abc\" \"ab\"");
String expecting =
"[@0,0:4='\"abc\"',<5>,1:0]\n" +
"[@1,6:9='\"ab\"',<5>,1:6]\n" +
"[@2,10:9='<EOF>',<-1>,1:10]\n";
assertEquals(expecting, found);
}
@Test public void testKeywordID() throws Exception { @Test public void testKeywordID() throws Exception {
String grammar = String grammar =
"lexer grammar L;\n"+ "lexer grammar L;\n"+