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Reduce-Reduce problem choosing a path
From: |
Adam Smalin |
Subject: |
Reduce-Reduce problem choosing a path |
Date: |
Thu, 30 May 2013 16:02:16 -0400 |
Here is an example of my input
thing { $var.member }
The problem is I allow
thing { .member $var }
So what is happening is I'd LIKE to always use $var.member but it can
reduce $var then .member which should not be allowed if $var is in front of
it (or $foo or $anything).
I'm not exactly sure where to put the precedence rule or how to. Both paths
take VarB but one reduces too early. I blindly put %dprec on VarB ('$'
VarName %dprec 1) and on Token (Token: Tokenb %dprec 2 { ... }). But I
haven't used dprec and unsure how it works.I get the same ambiguity error
Ambiguity detected.
Option 1,
Body3 -> <Rule 43, tokens 183 .. 186>
Body3 -> <Rule 43, tokens 183 .. 185>
Body3 -> <Rule 41, tokens 183 .. 184>
Body4 -> <Rule 50, tokens 183 .. 184>
VarB -> <Rule 173, tokens 183 .. 184>
'$' <tokens 183 .. 183>
VarName <tokens 184 .. 184>
Body4 -> <Rule 51, tokens 185 .. 185>
Token -> <Rule 53, tokens 185 .. 185>
Tokenb -> <Rule 57, tokens 185 .. 185>
'.' <tokens 185 .. 185>
Body4 -> <Rule 44, tokens 186 .. 186>
Body5 -> <Rule 77, tokens 186 .. 186>
Body5B -> <Rule 79, tokens 186 .. 186>
Var -> <Rule 1063, tokens 186 .. 186>
VarFilter -> <Rule 1064, tokens 186 .. 186>
VAR <tokens 186 .. 186>
Option 2,
Body3 -> <Rule 41, tokens 183 .. 186>
Body4 -> <Rule 50, tokens 183 .. 186>
VarB -> <Rule 173, tokens 183 .. 186>
'$' <tokens 183 .. 183>
VarName -> <Rule 1023, tokens 184 .. 186>
VarName <tokens 184 .. 184>
'.' <tokens 185 .. 185>
Var -> <Rule 1063, tokens 186 .. 186>
VarFilter -> <Rule 1064, tokens 186 .. 186>
VAR <tokens 186 .. 186>
- Reduce-Reduce problem choosing a path,
Adam Smalin <=