Mercurial > vim
comparison runtime/doc/eval.txt @ 17674:06c3e15ad84d v8.1.1834
patch 8.1.1834: cannot use a lambda as a method
commit https://github.com/vim/vim/commit/22a0c0c4ecd23b6c43f79ba9b92899ca0b426e29
Author: Bram Moolenaar <Bram@vim.org>
Date: Fri Aug 9 23:25:08 2019 +0200
patch 8.1.1834: cannot use a lambda as a method
Problem: Cannot use a lambda as a method.
Solution: Implement ->{lambda}(). (closes https://github.com/vim/vim/issues/4768)
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Fri, 09 Aug 2019 23:30:05 +0200 |
| parents | 95c23e180022 |
| children | 14ac8c31e598 |
comparison
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| 17673:3043c52e08e4 | 17674:06c3e15ad84d |
|---|---|
| 1215 expr8(expr1, ...) |Funcref| function call | 1215 expr8(expr1, ...) |Funcref| function call |
| 1216 | 1216 |
| 1217 When expr8 is a |Funcref| type variable, invoke the function it refers to. | 1217 When expr8 is a |Funcref| type variable, invoke the function it refers to. |
| 1218 | 1218 |
| 1219 | 1219 |
| 1220 expr8->name([args]) method call *method* | 1220 expr8->name([args]) method call *method* *->* |
| 1221 expr8->{lambda}([args]) | |
| 1221 | 1222 |
| 1222 For methods that are also available as global functions this is the same as: > | 1223 For methods that are also available as global functions this is the same as: > |
| 1223 name(expr8 [, args]) | 1224 name(expr8 [, args]) |
| 1224 There can also be methods specifically for the type of "expr8". | 1225 There can also be methods specifically for the type of "expr8". |
| 1225 | 1226 |
| 1226 This allows for chaining, passing the value that one method returns to the | 1227 This allows for chaining, passing the value that one method returns to the |
| 1227 next method: > | 1228 next method: > |
| 1228 mylist->filter(filterexpr)->map(mapexpr)->sort()->join() | 1229 mylist->filter(filterexpr)->map(mapexpr)->sort()->join() |
| 1229 < | 1230 < |
| 1231 Example of using a lambda: > | |
| 1232 GetPercentage->{x -> x * 100}()->printf('%d%%') | |
| 1233 | |
| 1230 *E274* | 1234 *E274* |
| 1231 "->name(" must not contain white space. There can be white space before the | 1235 "->name(" must not contain white space. There can be white space before the |
| 1232 "->" and after the "(", thus you can split the lines like this: > | 1236 "->" and after the "(", thus you can split the lines like this: > |
| 1233 mylist | 1237 mylist |
| 1234 \ ->filter(filterexpr) | 1238 \ ->filter(filterexpr) |