| Type | Issue | Status | tested | Date | 10-Jan-2010 10:20 |
|---|---|---|---|---|---|
| Version | alpha 95 | Category | Syntax | Submitted by | meijeru |
| Platform | All | Severity | minor | Priority | normal |
| Summary | More subtleties with < and > |
|---|---|
| Description | In many cases, the sign < or > following another lexical item without intervening whitespace is correctly recognized as a word of its own. In other cases, it is not. I have not yet fathomed the logic. |
| Example code |
>> length? [a<] == 2 >> length? [a>] ** Syntax error: invalid "word" -- "a>" >> length? [a+<] == 2 >> length? [1<] ** Syntax error: invalid "integer" -- "1<" >> length? [+<] ** Syntax error: invalid "word" -- "+<" |
| Assigned to | n/a | Fixed in | alpha 97 | Last Update | 8-Feb-2010 03:16 |
|---|
| Comments | |
|---|---|
|
(0001977)
Carl 6-Feb-2010 17:41 |
What you are seeing here is that some of the lexical classes overlap. In such overlap cases, explicit code must be used to disambiguate the usage. There are still a few holes here and there, so you found one.
The way to understand the difference between a< and +< comes from the fact that a is of word-class and + is of special-class (because it's allowed within various other datatype forms, such as +1234.) This ticket will be fixed, but I wanted to make this special note for future reference. |
|
(0002006)
BrianH 8-Feb-2010 03:16 |
Note: As of alpha 97 the above examples that didn't generate syntax errors now do so. |
| Date | User | Field | Action | Change |
|---|---|---|---|---|
| 8-Feb-2010 03:16 | BrianH | Comment : 0002006 | Added | - |
| 8-Feb-2010 03:15 | BrianH | Status | Modified | built => tested |
| 6-Feb-2010 18:47 | Carl | Fixedin | Modified | => alpha 97 |
| 6-Feb-2010 18:47 | Carl | Status | Modified | reviewed => built |
| 6-Feb-2010 17:41 | Carl | Comment : 0001977 | Added | - |
| 12-Jan-2010 20:53 | carl | Code | Modified | - |
| 12-Jan-2010 20:53 | carl | Status | Modified | submitted => reviewed |
| 10-Jan-2010 10:20 | meijeru | Ticket | Added | - |