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| author | Adrian Thurston <thurston@complang.org> | 2013-12-15 14:33:45 -0500 |
|---|---|---|
| committer | Adrian Thurston <thurston@complang.org> | 2013-12-15 14:33:45 -0500 |
| commit | 6dbc65a7d74b183172331748e76a1937184deacc (patch) | |
| tree | 02b6b1ab0ea78b3b5ba532cee9c334f98f4da81c /src/colm.lm | |
| parent | d1ac9cb83fc276925bad0c68009fa72830b33f6d (diff) | |
| download | colm-6dbc65a7d74b183172331748e76a1937184deacc.tar.gz | |
added the cast operator
The cast operator converts a tree to another type by copying over tokdata,
ignore tokens, and children. The new tree has the type of the target of the
cast. Attributes are cleared (# determined by target type). The production
number is set to -1.
Diffstat (limited to 'src/colm.lm')
| -rw-r--r-- | src/colm.lm | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/colm.lm b/src/colm.lm index 1a0c54e3..f9125b36 100644 --- a/src/colm.lm +++ b/src/colm.lm @@ -42,6 +42,7 @@ lex token PREEOF / 'preeof' / token GLOBAL / 'global' / token EOS / 'eos' / + token CAST / 'cast' / token MAKE_TOKEN / 'make_token' / token MAKE_TREE / 'make_tree' / @@ -480,6 +481,7 @@ def code_factor | [MAKE_TOKEN POPEN MakeTokenExprList: code_expr* PCLOSE] :MakeToken | [TYPEID LT type_ref GT] :TypeId | [NEW code_factor] :New +| [CAST LT type_ref GT code_factor] :Cast def type_ref [region_qual id opt_repeat] :Id |