如何解析Cmake隐式地将“BOOLEAN”类型转换为“STRING”类型

if(DEFINED MY_BOOL_VAR AND MY_BOOL_VAR)
    # Do something when MY_BOOL_VAR is TRUE
else()
    # Do something else
endif()

string(TOLOWER "${MY_STRING_VAR}" LOWERCASE_VAR)
if(LOWERCASE_VAR STREQUAL "true")
    # Do something when MY_STRING_VAR is "true"
endif()

set(MY_BOOL_VAR TRUE)
if(MY_BOOL_VAR)
    # Do something when MY_BOOL_VAR is TRUE
endif()

cmake_minimum_required(VERSION 3.10)
project(MyProject)

# 设置一个布尔变量
set(MY_BOOL_VAR TRUE)

# 使用if语句检查布尔变量的值
if(MY_BOOL_VAR)
    message(STATUS "MY_BOOL_VAR is TRUE")
else()
    message(STATUS "MY_BOOL_VAR is FALSE")
endif()

# 如果需要将字符串转换为布尔值
set(MY_STRING_VAR "true")
string(TOLOWER "${MY_STRING_VAR}" LOWERCASE_VAR)
if(LOWERCASE_VAR STREQUAL "true")
    message(STATUS "MY_STRING_VAR is interpreted as TRUE")
else()
    message(STATUS "MY_STRING_VAR is interpreted as FALSE")
endif()