SA0134:显式有符号/无符号转换

检测从有符号数据类型到无符号数据类型的显式转换，以及反向转换

理由过多地使用类型转换可能表明你为变量选择了错误的数据类型。因此，有一些编程指南要求明确说明数据类型转换的理由。

重要性：低

示例

PROGRAM PLC_PRG
VAR
	byVar :BYTE;
	udiVar : UDINT;
	uliVar : ULINT;
	lwVar : LWORD;
	wVar : WORD;
	siVar	: SINT;
	iVar	: INT;
	diVar : DINT;
	liVar	: LINT;
END_VAR
liVar := ULINT_TO_LINT(uliVar);
udiVar := DINT_TO_UDINT(diVar);
siVar := BYTE_TO_SINT(byVar);
wVar := INT_TO_WORD(iVar);
lwVar := SINT_TO_LWORD(siVar);

--> SA0134: Explicit signed/unsigned conversion from type 'ULINT' to type 'LINT'
--> SA0134: Explicit signed/unsigned conversion from type 'DINT' to type 'UDINT'
--> SA0134: Explicit signed/unsigned conversion from type 'BYTE' to type 'SINT'
--> SA0134: Explicit signed/unsigned conversion from type 'INT' to type 'WORD'
--> SA0134: Explicit signed/unsigned conversion from type 'SINT' to type 'LWORD'

另见

⮫ “配置和运行静态分析”