compile error: multi-character literals are not allowed in lexer sets

[hlolli]

From this line

fastr/com.oracle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g

Line 957 in 498b309

fragment ID_NAME : ('a'..'z'|'A'..'Z'|'α'..'ω'|'Α'..'Ω'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'α'..'ω'|'Α'..'Ω'|'_'|'.')* ;

I get multi-character literals are not allowed in lexer sets: '??' when compiling fastr 1.0.0-rc15. I fixed it with a sed operation where I delete "'α'..'ω'|'Α'..'Ω'|". I don't have the exact line:column anymore after my fix, but it was pointing at these greek letters.

[steve-s]

Hello Hlöðver,

thank you for reporting this. We haven't seen this issue before and cannot reproduce. However, it is true that we should have some more robust solution than lexer sets. Can you try the following patch?

diff --git a/com.oracle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g b/com.oracle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g
index 5dda25a39d..766cd3f1d8 100644
--- a/com.oracle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g
+++ b/com.oracle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g
@@ -954,7 +954,7 @@ fragment OP_NAME
     | ('*'|'/'|'+'|'-'|'>'|'<'|'='|'|'|'&'|':'|'^'|'.'|'~'|','|'?')
     ;
 
-fragment ID_NAME : ('a'..'z'|'A'..'Z'|'α'..'ω'|'Α'..'Ω'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'α'..'ω'|'Α'..'Ω'|'_'|'.')* ;
+fragment ID_NAME : [\p{Alpha}_] [\p{Alnum}_.]* ;
 
 fragment ESC_SEQ
     : '\\' ('b'|'t'|'n'|'f'|'r'|'"'|'\''|'`'|'\\'|' '|'a'|'v')

[steve-s]

Should be fixed, please re-open if the problem persists.

[hlolli]

ok, I won't have time to test until 1,5 week. Will report!

…

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