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-rw-r--r--syntax/swift.vim6
1 files changed, 3 insertions, 3 deletions
diff --git a/syntax/swift.vim b/syntax/swift.vim
index d4b5e3b6..4a9fa20f 100644
--- a/syntax/swift.vim
+++ b/syntax/swift.vim
@@ -64,9 +64,9 @@ syntax match swiftNumber "\v<\d+>"
syntax match swiftNumber "\v<(\d+_+)+\d+(\.\d+(_+\d+)*)?>"
syntax match swiftNumber "\v<\d+\.\d+>"
syntax match swiftNumber "\v<\d*\.?\d+([Ee]-?)?\d+>"
-syntax match swiftNumber "\v<0x\x+([Pp]-?)?\x+>"
-syntax match swiftNumber "\v<0b[01]+>"
-syntax match swiftNumber "\v<0o\o+>"
+syntax match swiftNumber "\v<0x[[:xdigit:]_]+([Pp]-?)?\x+>"
+syntax match swiftNumber "\v<0b[01_]+>"
+syntax match swiftNumber "\v<0o[0-7_]+>"
" BOOLs
syntax keyword swiftBoolean