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| author | gemath <33119724+gemath@users.noreply.github.com> | 2021-06-28 12:33:20 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-06-28 12:33:20 +0200 |
| commit | e720bbdd76303e2cc0a3a169e870859470a1da84 (patch) | |
| tree | b8cad0c1c8b90ebafb0e74c134ec303d026078b5 /tests/stdlib/tpegs.nim | |
| parent | 908b2cc2e44bededdcb943778f44b908a4f3c1df (diff) | |
| download | Nim-e720bbdd76303e2cc0a3a169e870859470a1da84.tar.gz | |
Peg captures get stack-like behavior (#18369)
* Implements reverse capture indexing. * Now works for modified backrefs too. * Changed reverse indexing syntax prefix for back-references to '$^'.
Diffstat (limited to 'tests/stdlib/tpegs.nim')
| -rw-r--r-- | tests/stdlib/tpegs.nim | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/stdlib/tpegs.nim b/tests/stdlib/tpegs.nim index f2c93c2e5..1261d55b8 100644 --- a/tests/stdlib/tpegs.nim +++ b/tests/stdlib/tpegs.nim @@ -293,6 +293,34 @@ block: doAssert "test1".match(peg"""{@}$""") doAssert "test2".match(peg"""{(!$ .)*} $""") + + doAssert "abbb".match(peg"{a} {b} $2 $^1") + doAssert "abBA".match(peg"{a} {b} i$2 i$^2") + + doAssert "abba".match(peg"{a} {b} $^1 {} $^1") + + block: + let grammar = peg""" +program <- {''} stmt* $ +stmt <- call / block +call <- 'call()' EOL +EOL <- \n / $ +block <- 'block:' \n indBody +indBody <- {$^1 ' '+} stmt ($^1 stmt)* {} +""" + let program = """ +call() +block: + block: + call() + call() + call() +call() +""" + var c: Captures + doAssert program.len == program.rawMatch(grammar, 0, c) + doAssert c.ml == 1 + pegsTest() static: pegsTest() |