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* generic/tclAssemble.c: operations.
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* generic/tclAssemble.c: "white box" structure that follows the
C code. Added missing safety checks on the operands of 'over' and
'reverse' so that negative operand counts don't smash the stack.
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* generic/tclAssembly.c: Added the error checking and reporting
for undefined labels. Revised code so that no pointers into the
bytecode sequence are held (because the sequence can move!),
that no Tcl_HashEntry pointers are held (because the hash table
doesn't guarantee their stability!) and to eliminate the BBHash
table, which is merely additional information indexed by jump
labels and can just as easily be held in the 'label' structure.
Renamed shared structures to CamelCase, and renamed 'label' to
JumpLabel because other types of labels may eventually be possible.
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Also replaced a funky NRCallTEBC with the new call TclNRExecuteByteCode.
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* generic/tclAssembly.c: Fixed bugs exposed by the new tests.
(a) [eval] and [expr] had incorrect stack balance computed if
the arg was not a simple word. (b) [concat] accepted a negative
operand count. (c) [invoke] accepted a zero or negative operand
count. (d) more misspelt error messages.
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comprehensive test suite for the assembler.
* generic/tclAssembly.c: Fixed bugs exposed by the new tests:
(a) [bitnot] and [not] had incorrect operand counts. (b)
INST_CONCAT cannot concatenate zero objects. (c) misspelt error
messages. (d) the "assembly code" internal representation lacked
a duplicator, which caused double-frees of the Bytecode object
if assembly code ever was duplicated.
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* tclAssembly.h: to use a Tcl-like syntax (and use
* tests/assemble.test: Tcl_ParseCommand to parse it). The
* tests/assemble1.bench: refactoring also ensures that
Tcl_Tokens in the assembler have string ranges inside the source
code, which allows for [eval] and [expr] assembler directives
that simply call TclCompileScript and TclCompileExpr recursively.
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Tcl bytecode language
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