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* To-be-closed variable in 'for' loop separated from the stateRoberto Ierusalimschy2018-11-071-1/+36
| | | | | | | | | The variable to be closed in a generic 'for' loop now is the 4th value produced in the loop initialization, instead of being the loop state (the 2nd value produced). That allows a loop to use a state with a '__toclose' metamethod but do not close it. (As an example, 'f:lines()' might use the file 'f' as a state for the loop, but it should not close the file when the loop ends.)
* New syntax for to-be-closed variablesRoberto Ierusalimschy2018-11-071-3/+3
| | | | | | | The new syntax is <local *toclose x = f()>. The mark '*' allows other attributes to be added later without the need of new keywords; it also allows better error messages. The API function was also renamed ('lua_tobeclosed' -> 'lua_toclose').
* State in generic 'for' acts as a to-be-closed variableRoberto Ierusalimschy2018-10-311-4/+4
| | | | | | | | | | | The implicit variable 'state' in a generic 'for' is marked as a to-be-closed variable, so that the state will be closed as soon as the loop ends, no matter how. Taking advantage of this new facility, the call 'io.lines(filename)' now returns the open file as a second result. Therefore, an iteraction like 'for l in io.lines(name)...' will close the file even when the loop ends with a break or an error.
* Added a '__close' metamethod to file handlesRoberto Ierusalimschy2018-10-231-22/+35
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* Added directory to test file names in '$Id:'Roberto Ierusalimschy2018-07-251-1/+1
| | | | | | | From the point of view of 'git', all names are relative to the root directory of the project. So, file names in '$Id:' also should be relative to that directory: the proper name for test file 'all.lua' is 'testes/all.lua'.
* Added manual and tests for version 5.4-w2Roberto Ierusalimschy2018-07-091-0/+832