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same literal different modes gens no literal in .tokens, rm warning

This commit is contained in:
Terence Parr 2012-08-04 13:51:18 -07:00
parent 6d12cbfddb
commit 4090621beb
3 changed files with 8 additions and 22 deletions
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21
tool/playground/T.g
View File

@ -1,19 +1,4 @@
grammar T;
lexer grammar T;
s: expr_or_assign* ;
expr_or_assign
: expr '++'
| expr
;
expr : expr_primary ('<-' ID)? ;
expr_primary
: '(' ID ')'
| ID '(' ID ')'
| ID
;
ID : [a-z]+ ;
WS : [ \t\r\n]+ -> skip ;
A : 'a' ;
B : 'a' ;

7
tool/src/org/antlr/v4/semantics/SemanticPipeline.java
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@ -171,9 +171,10 @@ public class SemanticPipeline {
G.defineTokenAlias(nameAST.getText(), litAST.getText());
}
else {
g.tool.errMgr.grammarError(ErrorType.ALIAS_REASSIGNMENT,
g.fileName, nameAST.token,
litAST.getText(), nameAST.getText());
// oops two literal defs in two rules (within or across
// modes). Remove literal in either case so it's not
// found by parser.
G.stringLiteralToTypeMap.remove(litAST.getText());
}
}
}

2
tool/src/org/antlr/v4/tool/ErrorType.java
View File

@ -145,7 +145,7 @@ public enum ErrorType {
ALT_LABEL_CONFLICTS_WITH_RULE(124, "rule alt label <arg> conflicts with rule <arg2>", ErrorSeverity.ERROR),
IMPLICIT_TOKEN_DEFINITION(125, "implicit definition of token <arg> in parser", ErrorSeverity.WARNING),
IMPLICIT_STRING_DEFINITION(126, "cannot create implicit token for string literal <arg> in non-combined grammar", ErrorSeverity.ERROR),
ALIAS_REASSIGNMENT(127, "token literal <arg> aliased to new token name <arg2>", ErrorSeverity.WARNING),
// ALIAS_REASSIGNMENT(127, "token literal <arg> aliased to new token name <arg2>", ErrorSeverity.WARNING),
/** Documentation comment is unterminated */
//UNTERMINATED_DOC_COMMENT(, "", ErrorSeverity.ERROR),