Hrm... yes... playing around some more I find the problem is more insidious than I had thought...
When I pass the following to it
{201({2}}
I get the error from the abstraction rule...
When I pass
4 * {201({2}}
My match fails, but I don't get the error from abstraction... maybe I am being bitten by leftop somehow...
Here follows the whole grammar.
startrule: { ($abscb,$self) = @arg } <reject>
startrule: bin_op /^\Z/ { $item[1] }
bin_op: logical_op
# Lowest precendance the comparitive operators...
logical_op: <leftop: equality_op LOGICAL equality_op>
{ treeify(@{$item[1]}); }
equality_op: <leftop: comp_op EQUALITY comp_op>
{ treeify(@{$item[1]}); }
comp_op: <leftop: add_op COMP add_op>
{ treeify(@{$item[1]}); }
add_op: <leftop: prod_op SUM prod_op >
{ treeify(@{$item[1]}); }
# Highest precendance.
prod_op : <leftop: term PROD term >
{ treeify(@{$item[1]}); }
SUM : '+' | '-'
PROD : '*' | '/' | '%'
COMP : />=?|<=?|le|ge|lt|gt/
EQUALITY : /!=|==?|eq|ne/
LOGICAL : 'AND' | 'OR' | '&&' | '||'
arg_list: list_bin_op(s?) bin_op { [@{$item[1]},$item[2]] }
# Functions, parenthesized equations, abstractions numbers and strin
+gs are all basically atomic.
term: function
| abstraction
| '(' <commit> bin_op ')' { $item[2] }
| number
| /\$[1-9]/ { [ 'arg', substr($item[1],1,1) ] }
| string
| 'NULL'
| <error>
abstraction: '{' number '(' <commit> arg_list ')' '}' { $abscb->($it
+em[2],$item[4]) }
| '{' <commit> number '}' { $abscb->($item[2]) }
| <error?: GRRRRRRRRRRRR> <reject>
# There is probably a prettier way to do these, but this works
if: /if/i '(' list_bin_op(2) bin_op ')' { [$item[1],@{$item[3]},$ite
+m[4]] }
concat: /concat/i '(' list_bin_op(s) bin_op ')' { [$item[1],@{$item[
+3]},$item[4]] }
left: /left/i '(' list_bin_op bin_op ')' { [@item[1,3,4]] }
right: /right/i '(' list_bin_op bin_op ')' { [@item[1,3,4]] }
ifnull: /ifnull/i '(' list_bin_op bin_op ')' { [@item[1,3,4]] }
now: /now/i '(' ')' { [$item[1],''] } # if you don't return two item
+s, they seem to get flattened somewhere, making it the string NOW
length_func: /length/i '(' bin_op ')' { [@item[1,3]] }
interval: /interval/i /\d+/ /MONTH|DAY|WEEK|YEAR/ { [@item[1,2,3]] }
last_day: /last_day/i '(' bin_op ')' { [@item[1,3]] }
date_format: /date_format/i '(' list_bin_op bin_op ')' { [@item[1,3
+,4]] }
# just the list of all the functions
function: if | concat | left | right | ifnull | now | length_func |
+interval | last_day | date_format
number: /[+-]?(?:\d+\.?\d*|\.\d+)/ { $item[1] }
list_bin_op: bin_op ',' { $item[1] }
string: <perl_quotelike> {
if(!$item[1][0] && ($item[1][1] eq '"' || $item[1][1] eq "'")) {
[$item[0],$item[1][2]];
} else {
undef;
}
}
- Ant
- Some of my
best work - (1 2 3)