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| author | Charlie Stanton <charlie@shtanton.xyz> | 2023-04-18 15:07:52 +0100 |
|---|---|---|
| committer | Charlie Stanton <charlie@shtanton.xyz> | 2023-04-18 15:07:52 +0100 |
| commit | ffd1b73b4f3294d9f3aa2ed600da3ba053aeb47c (patch) | |
| tree | ac3075e8ea26190838e0e6df3f5e6af65909ca51 /subex/parse.go | |
| parent | febdc5dcd5b25a090b90c920914775265da98d39 (diff) | |
| download | stred-go-ffd1b73b4f3294d9f3aa2ed600da3ba053aeb47c.tar | |
Adds the sum operator
Currently doesn't parse strings as each atom is considered independantly. Instead individual characters in strings can be cast
Diffstat (limited to 'subex/parse.go')
| -rw-r--r-- | subex/parse.go | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/subex/parse.go b/subex/parse.go index 6e1493b..0208142 100644 --- a/subex/parse.go +++ b/subex/parse.go @@ -206,7 +206,7 @@ func parseSubex(l *RuneReader, minPower int) SubexAST { case '[': rangeParts := parseRangeSubex(l) lhs = SubexASTRange {rangeParts} - case ')', '|', ';', '{': + case ')', '|', ';', '{', '+': l.rewind() return nil case '$': @@ -243,10 +243,12 @@ func parseSubex(l *RuneReader, minPower int) SubexAST { r := l.next() switch { case r == '{' && minPower <= 8: - lhs = SubexASTRepeat{ + lhs = SubexASTRepeat { content: lhs, acceptable: parseRepeatRange(l), } + case r == '+' && minPower <= 8: + lhs = SubexASTSum {lhs} case r == '|' && minPower <= 4: rhs := parseSubex(l, 5) if rhs == nil { @@ -262,13 +264,6 @@ func parseSubex(l *RuneReader, minPower int) SubexAST { content: lhs, delimiter: rhs, } - //case r == '+' && minPower <= 6: - // rhs := parseSubex(l, 7) - // if rhs == nil { - // panic("Missing subex after +") - // } - // // TODO: Implement this. Runs subex on the left, then subex on the right, then sums the outputs of each and outputs that - // lhs = SubexASTAdd{lhs, rhs} default: l.rewind() break loop |