forked from glen/fostr
51 lines
1.1 KiB
Plaintext
51 lines
1.1 KiB
Plaintext
|
module Common
|
||
|
|
|
||
|
|
lexical sorts
|
||
|
|
ID INT STRING
|
||
|
|
STRING_CHAR BACKSLASH_CHAR
|
||
|
|
COMMENT_CHAR INSIDE_COMMENT
|
||
|
|
NEWLINE_EOF EOF
|
||
|
|
|
||
|
|
lexical syntax
|
||
|
|
|
||
|
|
ID = [a-zA-Z] [a-zA-Z0-9]*
|
||
|
|
INT = "-"? [0-9]+
|
||
|
|
STRING = "\"" STRING_CHAR* "\""
|
||
|
|
STRING_CHAR = ~[\\\"\n]
|
||
|
|
STRING_CHAR = "\\\""
|
||
|
|
STRING_CHAR = BACKSLASH_CHAR
|
||
|
|
BACKSLASH_CHAR = "\\"
|
||
|
|
LAYOUT = [\ \t\n\r]
|
||
|
|
COMMENT_CHAR = [\*]
|
||
|
|
LAYOUT = "/*" INSIDE_COMMENT* "*/"
|
||
|
|
INSIDE_COMMENT = ~[\*]
|
||
|
|
INSIDE_COMMENT = COMMENT_CHAR
|
||
|
|
LAYOUT = "//" ~[\n\r]* NEWLINE_EOF
|
||
|
|
NEWLINE_EOF = [\n\r]
|
||
|
|
NEWLINE_EOF = EOF
|
||
|
|
EOF =
|
||
|
|
|
||
|
|
lexical restrictions
|
||
|
|
|
||
|
|
// Ensure greedy matching for lexicals
|
||
|
|
|
||
|
|
COMMENT_CHAR -/- [\/]
|
||
|
|
INT -/- [0-9]
|
||
|
|
ID -/- [a-zA-Z0-9\_]
|
||
|
|
|
||
|
|
// EOF may not be followed by any char
|
||
|
|
|
||
|
|
EOF -/- ~[]
|
||
|
|
|
||
|
|
// Backslash chars in strings may not be followed by "
|
||
|
|
|
||
|
|
BACKSLASH_CHAR -/- [\"]
|
||
|
|
|
||
|
|
context-free restrictions
|
||
|
|
|
||
|
|
// Ensure greedy matching for comments
|
||
|
|
|
||
|
|
LAYOUT? -/- [\ \t\n\r]
|
||
|
|
LAYOUT? -/- [\/].[\/]
|
||
|
|
LAYOUT? -/- [\/].[\*]
|