Aadhavan Srinivasan
7056026e10
Added a new class 'CHARCLASS', which represents a character class with some other postfixNodes in it. The 'except' field now contains a list of postfixNodes rather than runes
3 days ago
Aadhavan Srinivasan
b81a2f8452
Added functions to find if a character is a valid hex value and a valid octal value
3 days ago
Aadhavan Srinivasan
fcdb4a8868
Added another test, changed function calls to match new names
3 days ago
Aadhavan Srinivasan
3a3333b38a
New features, changed character class behavior
...
I added support for hex values (eg. \x0F), octal values (eg. \012) and
extended hex values (eg. \x{000F2A}). I also expanded the abilities of
character clsses, to include things like escaped characters (eg. [aefp\)])
and character ranges _inside_ inverted character classes (eg. [^\w] which is
functionally equivalent to [\W]).
3 days ago
Aadhavan Srinivasan
4376ccb77d
Renamed function calls to use new names
3 days ago
Aadhavan Srinivasan
3f0360b9be
Fixed bug where I used the 'lookaroundNumCaptureGroups' member of the wrong State struct
2 weeks ago
Aadhavan Srinivasan
0956dddd81
Fixed bug where I checked if flag was enabled before calling flag.Parse()
2 weeks ago
Aadhavan Srinivasan
0b84806fc4
Added 'flags' to the Compile function, instead of maintaining global state to check whether certain features were enabled
2 weeks ago
Aadhavan Srinivasan
24fa365be1
Moved some auxiliary functions into compile.go; use new API for compiling and finding matches
2 weeks ago
Aadhavan Srinivasan
1da3f7f0e0
Changed API for match-finding functions - take in a Reg instead of start state and numGroups separately
2 weeks ago
Aadhavan Srinivasan
8e8067482a
Rewrote to use new API for compiling and finding matches
2 weeks ago
Aadhavan Srinivasan
644ed15af0
Use new API for findAllMatches
2 weeks ago
Aadhavan Srinivasan
c8613c1ba2
Major restructuring - added new type, changed return types for shuntingYard and thompson
...
I added a new function 'Compile' that calls shuntingYard and thompson. I also added
a new type 'Reg' that this function returns - it represents the starting state and contains
the number of capturing groups in the regex. I also rewrote shuntingYard and thompson
to return errors instead of panicking.
2 weeks ago
Aadhavan Srinivasan
ddbcb309b0
Made shuntingYard return an error instead of panicking, moved it and thompson to compile.go
2 weeks ago
Aadhavan Srinivasan
72263509d3
Rewrote behavior of '-m' flag to use the 'nth match' function from matching.go
2 weeks ago
Aadhavan Srinivasan
4373d35216
Wrote function to find the 'n'th match of a regex
2 weeks ago
Aadhavan Srinivasan
3fa4d0f75e
Updated TODO
3 weeks ago
Aadhavan Srinivasan
6f9173f771
Finished support for -m flag; refactoring pending
3 weeks ago
Aadhavan Srinivasan
8a0586d107
Added support for printing specific match indices ('-m' and '-p' flags combined)
3 weeks ago
Aadhavan Srinivasan
13ca954072
Started working on '-m num' flag : print the <num>th match
1 month ago
Aadhavan Srinivasan
85eb13287e
Updated TODO
1 month ago
Aadhavan Srinivasan
e83d746ded
Added more test cases
1 month ago
Aadhavan Srinivasan
98f4c9e418
Added support for non-capturing groups
1 month ago
Aadhavan Srinivasan
8d6e1a41a5
Fixed bug where a repeated capturing group eg. (a){3} wouldn't capture only the last iteration, like it should
1 month ago
Aadhavan Srinivasan
93a5e24c8d
Added more tests
1 month ago
Aadhavan Srinivasan
61bced606e
Added comments - certain members of State depend on the current match, should be reset
1 month ago
Aadhavan Srinivasan
71cab59a89
Got rid of unnecessary special case to match at end-of-string
...
Instead, I tweaked the rest of the matching function, so that a special
check isn't necessary. If we are trying to match at the end of a string,
we skip any of the actual matching and proceed straight to finding
0-length matches.
This change was made because, with the special case, capturing groups
weren't getting updated if we had an end-of-string match.
1 month ago
Aadhavan Srinivasan
8c8e209587
Removed return values that weren't being used
1 month ago
Aadhavan Srinivasan
332c2fe5a2
Made lookarounds a little more efficient by only matching from (or to, in the case of lookbehind) the current index
1 month ago
Aadhavan Srinivasan
3fda07280e
Added more tests
1 month ago
Aadhavan Srinivasan
e2b08f8d5f
Updated TODO
1 month ago
Aadhavan Srinivasan
84cccc73ec
Added grouping tests
1 month ago
Aadhavan Srinivasan
437ca2ee57
Improved submatch tracking by storing all group indices as a part of the state, which is viewed as a 'thread'
1 month ago
Aadhavan Srinivasan
00902944f6
Added code to match capturing groups and store into a Group (used to be MatchIndex)
1 month ago
Aadhavan Srinivasan
80ea262064
Updated test-case structs to reflect the name of the new type
1 month ago
Aadhavan Srinivasan
f5eb9c8218
Defined postfixNodes for LPAREN and RPAREN
1 month ago
Aadhavan Srinivasan
20fbd20994
Added helper function to expand a slice to a given length
1 month ago
Aadhavan Srinivasan
11f7f1d746
Added fields to state, to determine capturing group information. 0th group refers to entire match
1 month ago
Aadhavan Srinivasan
822d1f319f
Added initial support for capturing groups
1 month ago
Aadhavan Srinivasan
745fab9639
Clone lookaroundNFA when cloning a state; use compiled regex for
...
lookarounds instead of compiling a new one
2 months ago
Aadhavan Srinivasan
34e9aedbd6
Compile lookaround regex to avoid compiling each time we want to use it
2 months ago
Aadhavan Srinivasan
6208f32710
Added support for numeric ranges: <5-38> will match all numbers between 5 and 38, inclusive on both ends. Also print line number on which matches occur, if we are in printing (and single line) mode
2 months ago
Aadhavan Srinivasan
cbd6ea136b
If the NFA starts with an assertion, make sure it's true before doing anything else. Also, check for last-state _lookaround_ rather than just last state, before breaking (instead of aborting) when the assertion fails
2 months ago
Aadhavan Srinivasan
eb6a044ecf
Added angle brackets to list of special characters (which need to be escaped to be used literally
2 months ago
Aadhavan Srinivasan
393769f152
Accounted for last character being a newline when checking for EOS (we can be at the second-last character if the last one is a newline
2 months ago
Aadhavan Srinivasan
e36310b32d
Added function (and helper functions) to generate a regex that matches all numbers in a range
2 months ago
Aadhavan Srinivasan
298285e44c
Added more test cases
2 months ago
Aadhavan Srinivasan
0de3a94ce3
Fixed bug with lookaheads: f(?=f) would not match anything in 'ffa', because of the 'a' at the end of the string. Fixed by checking if there are other last states when an assertion fails, rather than immediately aborting
2 months ago
Aadhavan Srinivasan
fe1136c54c
Fixed bug with parentheses in lookaround regex; fixed bug with reading last line of test string (if it doesn't end in a newline)
2 months ago
Aadhavan Srinivasan
25c333bea4
Added function to determine if a state is a lookaround
2 months ago
