Lua通常是一种 strongly-typed语言,几乎不提供数据类型之间的隐式转换. 但是,数字和字符串确实得到automatically coerced in a few cases: Lua provides automatic conversion between string and number values at run
但是,数字和字符串确实得到automatically coerced in a few cases:
Lua provides automatic conversion between string and number values at run time. Any arithmetic operation applied to a string tries to convert this string to a number, following the rules of the Lua lexer. (The string may have leading and trailing spaces and a sign.) Conversely, whenever a number is used where a string is expected, the number is converted to a string, in a reasonable format
从而:
local x,y,z = "3","8","11" print(x+y,z) --> 11 11 print(x+y==z) --> false print(x>z) --> true
我不想要这个.如何重新编译Lua解释器以删除所有自动转换?
我更愿意:
print(x+y) --> error: attempt to perform arithmetic on a string value print(x>1) --> error: attempt to compare number with string print(x..1) --> error: attempt to concatenate a number value杰出的 LHF在上面评论说这不是开箱即用的,需要编辑Lua的内部,从 http://www.lua.org/source/5.2/lvm.c.html#luaV_tonumber开始
将此标记为答案以便结束此问题.如果有人后来选择提供有关需要做什么的深入细节的答案,我很乐意将接受标记切换到该答案.