On 03/02/2014 01:42, Martin Frb wrote:
http://www.freepascal.org/docs-html/ref/refch12.html#x120-13000012
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Table 12.1: Precedence of operators
Operator Precedence Category
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
Not, @ Highest (first) Unary operators
* / div mod and shl shr as << >> Second Multiplying operators
+ - or xor Third Adding operators
= <> < > <= >= in is Lowest (Last) relational operators
This does not include:
^ deref
- unary minus
. accessing a member of a class/record (not unary)
Further, it appears that ^ has a higher precedence than unary -
program Project1;
operator - (a: PInteger) b: PInteger;
begin
b := PInteger(-Integer(a));
end;
var
p: PInteger;
i: Integer;
begin
i:= 99;
p:=@i;
// p:= -@i; // if enabled, next line will crash
writeln( -p^ ); // writes -99
readln;
end.
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