majkinetor wrote:
This expression doesn't work though: 1 ? 5 : 6
Works for me.
Code:
MsgBox % __expr("1 ? 5 : 6")
I did, however, find and fix two bugs in function deref parsing. "func0()+1" would not work when func0 has no parameters because the ')' was skipped and "+1" was seen as a parameter. "func0()" worked because after the ')' is nothing. "func1(func0())" would not work because the inner ')' was skipped and the outer ')' was miscounted as a parameter.
Btw, __expr doesn't do
any expression evaluation. It constructs a Line and ArgStruct, and creates a DerefType for each var or func reference. It then assigns the Line to the __expr_sub function, and calls it.
Basically, it emulates the load-time processing of AutoHotkey.
If no var or func references are needed, it can be considerably simpler. The following is the third iteration of __expr (where the one in lowlevel.ahk is the fourth):
Code:
MsgBox % __expr("1 ? 5 : 6")
__expr(expr)
{
static line, arg
if !VarSetCapacity(line) {
VarSetCapacity(line,32,0), VarSetCapacity(arg,12,0)
NumPut(102,line,0,"char") ; line.mActionType = ACT_RETURN
NumPut(&arg,line,4) ; line.mArg = &arg
; Give mNextLine and mPrevLine non-NULL values in case the expression
; somehow causes a critical error, in which case AutoHotkey may try
; to use these to display the error line and the lines around it.
NumPut(&line,NumPut(&line,line,16)) ; line.mNextLine = line.mPrevLine = &line
NumPut(1,arg,1,"char") ; arg.is_expression = true
cb:=RegisterCallback("__expr_last")
NumPut(&line,NumGet(cb+28),4) ; cb->Func->mJumpToLine = &line
DllCall("GlobalFree","uint",cb)
}
NumPut(1,line,1,"char") ; line.mArgc = 1
NumPut(StrLen(expr)+1,arg,2,"short") ; arg.length = StrLen(expr)+1
NumPut(&expr,arg,4) ; arg.text = &expr
ret := __expr_last()
; Reset mArgc to 0 so ListLines does not try to read 'expr', which will
; become invalid once __expr() returns.
NumPut(0,line,1,"char") ; mArgc = 0
return ret
}
__expr_last() {
}
I will eventually write a function to evaluate commands. (This is why I wrote __MakeExpressionArg separate from __expr.) The command names must be translated to ActionType codes, and derefs in non-expression args must also be parsed.
Once that's done, a little extra work must be done to link the lines together properly and form a working dynamic script (with If, Loop, etc.)
Quote:
You are crazy.
You noticed?
I lost much sleep in the aftermath of high-speed idea collision.
DerRaphael wrote:
I was in shock for a while after coming up with "the idea."
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Thanks