Lua 5.3: wrong coercion?

[Lorenzo Donati <lorenzodonatibz@...>]

Hi all!

I just found something that seems odd in Lua 5.3.

According to sect 3.4.3 in the refman:

"The conversion from strings to numbers goes as follows: First, the 
string is converted to an integer or a float, following its syntax and 
the rules of the Lua lexer. (The string may have also leading and 
trailing spaces and a sign.) Then, the resulting number is converted to 
the required type (float or integer) according to the previous rules."

Thus if I have a string which is "42" it should be coerced to an 
integer, since 42 is parsed as an integer constant by the lexer, whereas 
I get:

print( 43, "42" + 1 ) --> 43   43.0

where it seems that the addition is a float addition, signaling that one 
of the operands is float. Is this a bug, an error in the refman or maybe 
something on my side (Windows 7-64, using 32bit executables compiled 
with TDM-GCC 4.9.2 32 bit)? Am I missing something?


-- Lorenzo