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| author | Adrian Thurston <thurston@colm.net> | 2018-12-17 14:10:50 +0200 |
|---|---|---|
| committer | Adrian Thurston <thurston@colm.net> | 2018-12-17 14:11:53 +0200 |
| commit | eccfd443ed78c614c396c542a07673c113f1ecd3 (patch) | |
| tree | 297658178b1f24d53c476c9fa62f5a44b9a87d9a /src/colm.lm | |
| parent | fc1d61f4cab2260e90fcd468078eaa0d2046f372 (diff) | |
| download | colm-eccfd443ed78c614c396c542a07673c113f1ecd3.tar.gz | |
allow referencing a tree in reduction actions
syntax is $*N
Diffstat (limited to 'src/colm.lm')
| -rw-r--r-- | src/colm.lm | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/colm.lm b/src/colm.lm index 2bd4497a..a8e398cf 100644 --- a/src/colm.lm +++ b/src/colm.lm @@ -364,9 +364,11 @@ lex token RED_LHS / '$' . '$' / token RED_RHS_REF / '$' . red_id / token RED_RHS_LOC / '@' . red_id / + token RED_TREE_REF / '$*' . red_id / token RED_RHS_NREF / '$' . ('1' .. '9') . ('0' .. '9')* / token RED_RHS_NLOC / '@' . ('1' .. '9') . ('0' .. '9')* / + token RED_TREE_NREF / '$*' . ('1' .. '9') . ('0' .. '9')* / token red_any / any / end @@ -385,8 +387,10 @@ def host_item | [red_any] | [RED_LHS] | [RED_RHS_REF] +| [RED_TREE_REF] | [RED_RHS_LOC] | [RED_RHS_NREF] +| [RED_TREE_NREF] | [RED_RHS_NLOC] | [RED_OPEN HostItems: host_item* RED_CLOSE] |