Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

add lark-based grammar #325

Merged
merged 3 commits into from
Nov 15, 2018
Merged

add lark-based grammar #325

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
9c3d029
add lark grammar of subset of IDL
dirk-thomas Nov 15, 2018
e890bfe
add additional rules to grammar
dirk-thomas Nov 15, 2018
8a2e80d
add priorities / weights to prefer certain rules
dirk-thomas Nov 15, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
48 changes: 48 additions & 0 deletions rosidl_parser/rosidl_parser/common.lark
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,48 @@
//
// Numbers
//

DIGIT: "0".."9"
HEXDIGIT: "a".."f"|"A".."F"|DIGIT

INT: DIGIT+
SIGNED_INT: ["+"|"-"] INT
DECIMAL: INT "." INT? | "." INT

// float = /-?\d+(\.\d+)?([eE][+-]?\d+)?/
_EXP: ("e"|"E") SIGNED_INT
FLOAT: INT _EXP | DECIMAL _EXP?
SIGNED_FLOAT: ["+"|"-"] FLOAT

NUMBER: FLOAT | INT
SIGNED_NUMBER: ["+"|"-"] NUMBER

//
// Strings
//
//STRING: /"(\\\"|\\\\|[^"\n])*?"i?/
STRING_INNER: ("\\\""|/[^"]/)
ESCAPED_STRING: "\"" STRING_INNER* "\""


//
// Names (Variables)
//
LCASE_LETTER: "a".."z"
UCASE_LETTER: "A".."Z"

LETTER: UCASE_LETTER | LCASE_LETTER
WORD: LETTER+

CNAME: ("_"|LETTER) ("_"|LETTER|DIGIT)*


//
// Whitespace
//
WS_INLINE: (" "|/\t/)+
WS: /[ \t\f\r\n]/+

CR : /\r/
LF : /\n/
NEWLINE: (CR? LF)+
Loading