opensources/lua - lua - Gitea: Git with home nas server

Commit Graph

Author	SHA1	Message	Date
Roberto Ierusalimschy	28d829c867	Calls cannot be tail in the scope of a to-be-closed variable A to-be-closed variable must be closed when a block ends, so even a 'return foo()' cannot directly returns the results of 'foo'; the function must close the scope before returning.	6 years ago
Roberto Ierusalimschy	35296e1fde	Details comments and other janitorial work.	6 years ago
Roberto Ierusalimschy	7f6f70853c	To-be-closed variable in 'for' loop separated from the state 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.)	6 years ago
Roberto Ierusalimschy	b8fed93215	New syntax for to-be-closed variables 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').	6 years ago
Roberto Ierusalimschy	947a372f58	State in generic 'for' acts as a to-be-closed variable 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.	6 years ago
Roberto Ierusalimschy	2316ec4c24	Back with optimization for 'if cond then goto' Statements like 'if cond then goto label' generate code so that the jump in the 'if' goes directly to the given label. This optimization cannot be done when the jump is backwards leaving the scope of some variable, as it cannot add the needed 'close' instruction. (The jumps were already generated by the 'if'.) This commit also added 'likely'/'unlikely' for tests for errors in the parser, and it changed the way breaks outside loops are detected. (Now they are detected like other goto's with undefined labels.)	6 years ago
Roberto Ierusalimschy	a006514ea1	Big revamp in the implmentation of labels/gotos Added restriction that, when a label is created, there cannot be another label with the same name visible. That allows backward goto's to be resolved when they are read. Backward goto's get a close if they jump out of the scope of some variable; labels get a close only if previous goto to it jumps out of the scope of some upvalue.	6 years ago
Roberto Ierusalimschy	6e9b719694	More uniformity in code generation for 'for' loops Added new instruction 'OP_TFORPREP' to prepare a generic for loop. Currently it is equivalent to a jump (but with a format 'iABx', similar to other for-loop preparing instructions), but soon it will be the place to create upvalues for closing loop states.	6 years ago
Roberto Ierusalimschy	41c800b352	Closing methods should not interfere with returning values A closing method cannot be called in its own stack slot, as there may be returning values in the stack after that slot, and the call would corrupt those values. Instead, the closing method must be copied to the top of the stack to be called. Moreover, even when a function returns no value, its return istruction still has to have its position (which will set the stack top) after the local variables, otherwise a closing method might corrupt another not-yet-called closing method.	6 years ago
Roberto Ierusalimschy	bd96330d03	First "complete" implementation of to-be-closed variables Still missing: - handling of memory errors when creating upvalue (must run closing method all the same) - interaction with coroutines	6 years ago
Roberto Ierusalimschy	4cd1f4aac0	Towards "to closed" local variables Start of the implementation of "scoped variables" or "to be closed" variables, local variables whose '__close' (or themselves) are called when they go out of scope. This commit implements the syntax, the opcode, and the creation of the corresponding upvalue, but it still does not call the finalizations when the variable goes out of scope (the most important part). Currently, the syntax is 'local scoped name = exp', but that will probably change.	6 years ago
Roberto Ierusalimschy	9cbf17b0f1	Details (comments)	6 years ago
Roberto Ierusalimschy	f99509581e	Removed extra information from RCS keyword strings Version numbers and dates (mostly wrong) from RCS keyword strings removed from all source files; only the file name are kept.	6 years ago
Roberto Ierusalimschy	15ce8d0904	in generational mode, an emergency collection can turn any object black during any memory allocation.	6 years ago
Roberto Ierusalimschy	03c6a05ec8	no more nil-in-table	7 years ago
Roberto Ierusalimschy	4a1612ff9b	new experimental syntax using reserved word 'undef'	7 years ago
Roberto Ierusalimschy	49dae52d08	correct way to check stack space for vararg functions	7 years ago
Roberto Ierusalimschy	b1379936cf	vararg back to '...' (but with another implementation) new implementation should have zero overhead for non-vararg functions	7 years ago
Roberto Ierusalimschy	318a9a5859	new opcode 'PREPVARARG' (avoids test for vararg function in all function calls)	7 years ago
Roberto Ierusalimschy	4676f6599e	new macros 'isOT'/'isIT' (plus exchanged parameters of OP_VARARG to make it similar to other 'isOT' instructions)	7 years ago
Roberto Ierusalimschy	d388c165ef	new opcodes 'FORLOOP1'/'FORPREP1' for "basic for" (integer variable with increment of 1)	7 years ago
Roberto Ierusalimschy	3064edead2	details (cleaning uses of 'exp1')	7 years ago
Roberto Ierusalimschy	b3f924bc69	'Proto->numparams' does not include vararg parameter (one less subtraction when calling functions...)	7 years ago
Roberto Ierusalimschy	e001d5aea6	'VRELOCABLE' -> 'VRELOC'	7 years ago
Roberto Ierusalimschy	49dfaf7447	avoid using one function for different tasks (malloc, free, etc.)	7 years ago
Roberto Ierusalimschy	10b8c99bbb	small peephole optimizations	7 years ago
Roberto Ierusalimschy	196c87c9ce	no more 'stackless' implementation; 'luaV_execute' calls itself recursively to execute function calls. 'unroll' continues all executions suspended by an yield (through a long jump)	7 years ago
Roberto Ierusalimschy	283e7455ff	detail	7 years ago
Roberto Ierusalimschy	722bdbe17d	no more 'getBMode'-'getCMode' (imprecise + we will need more space for op mode) + better control of op modes	7 years ago
Roberto Ierusalimschy	80d9b09f35	jumps do not close upvalues (to be faster and simpler); explicit instruction to close upvalues; command 'break' not handled like a 'goto' (to optimize removal of uneeded 'close' instructions)	7 years ago
Roberto Ierusalimschy	ac65bab25f	jumps in 'for' loops don't need to be signed	7 years ago
Roberto Ierusalimschy	b77f792b23	comment	7 years ago
Roberto Ierusalimschy	07db10813c	'OP_VARARG' has the vararg parameter as an operand	7 years ago
Roberto Ierusalimschy	f96497397a	new type 'StackValue' for stack elements (we may want to put extra info there in the future)	7 years ago
Roberto Ierusalimschy	b42430fd3a	'lineinfo' in prototypes saved as differences instead of absolute values, so that the array can use bytes instead of ints, reducing its size. (A new array 'abslineinfo' is used when line differences do not fit in a byte.)	7 years ago
Roberto Ierusalimschy	5c8770f896	back to old-style vararg system (with vararg table collecting extra arguments)	8 years ago
Roberto Ierusalimschy	5ecb31003f	bug: cannot "skip" labels after if-goto before the jump over the 'then' part	8 years ago
Roberto Ierusalimschy	502a1d1108	new opcodes for table access with constant keys (strings and integers)	8 years ago
Roberto Ierusalimschy	6a98aa0bb0	new opcode LOADI (for loading immediate integers)	8 years ago
Roberto Ierusalimschy	e4a9e6fcca	do not eliminate varargs from functions that do not use varargs (confuses the debug lib and gains very little in performance)	8 years ago
Roberto Ierusalimschy	dcb2998aa6	bug: expression list with four or more expressions in a 'for' loop can crash the interpreter. ('adjust_assign' must remove extra expresssions from its registers.)	8 years ago
Roberto Ierusalimschy	b65252b39b	'singlevaraux' returns result only in 'var->k'	9 years ago
Roberto Ierusalimschy	e7b2e01d43	bug: label between local definitions can mix-up their initializations	9 years ago
Roberto Ierusalimschy	1f259be52a	'getcode' -> 'getinstruction'	9 years ago
Roberto Ierusalimschy	542dbd4c65	detail (moving bodies of 'while' to a separate line)	9 years ago
Roberto Ierusalimschy	8c1fb91802	macro 'incr_top' replaced by function 'luaD_inctop'. (It is not used in critical time pathes, can save a few bytes without the macro)	9 years ago
Roberto Ierusalimschy	6707ce6349	function prepares vararg only if it really uses them (chunks are always declared vararg but seldom uses them)	9 years ago
Roberto Ierusalimschy	de3933480e	details	10 years ago
Roberto Ierusalimschy	9c41d9d1df	removed unneeded barrier ('from' must be white)	10 years ago
Roberto Ierusalimschy	28fdbcf393	added include for 'lprefix.h', for stuff that must be added before any other header file	10 years ago

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416 Commits (fdc25a1ebfe9968dcec390dd556375105aa0be40)