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Fixed trailing underscores in numeric literals (#1264)

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This change prohibits such illegal numeric literals as 13_37_ or 0xCAFE_BABE_ (note the trailing underscore).
This commit is contained in:
Nikolas Havrikov
2017-08-26 15:07:35 +02:00
committed by Dmitry Jemerov
parent fac207ce7c
commit 3d8b15d9db
1 changed files with 7 additions and 3 deletions
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grammar/src/lexical.grm
+7 -3
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@@ -7,7 +7,9 @@ Digit
: ["0".."9"]; : ["0".."9"];
IntegerLiteral IntegerLiteral
: Digit (Digit | "_")* : Digit
: Digit (Digit | "_")* Digit
;
FloatLiteral FloatLiteral
: <Java double literal>; : <Java double literal>;
@@ -17,7 +19,9 @@ HexDigit
: Digit | ["A".."F", "a".."f"]; : Digit | ["A".."F", "a".."f"];
HexadecimalLiteral HexadecimalLiteral
: "0x" HexDigit (HexDigit | "_")*; : "0x" HexDigit
: "0x" HexDigit (HexDigit | "_")* HexDigit
;
CharacterLiteral CharacterLiteral
: <character as in Java>; : <character as in Java>;
@@ -136,4 +140,4 @@ internal
protected protected
catch catch
finally finally
*/ */