C语言解释器-21 补充：支持struct

偶有闲暇，添加了对结构的支持。也增加了对typedef structname synonym的支持。

技巧：

1. 结构成员在解析时转换成相对结构于的起始地址之偏移。

2. 在运行时计算成员的实际地址（运行时变量才会分配地址 ）。

3. 成员按ValueOfPointerIndiction方式访问。



示例代码：

struct StructA {
		int a;
		int b;
	};

	StructA theA;

	theA.a = 1;
	theA.b = 2;

	print("theA.a=%i\ntheA.b=%i", theA.a, theA.b);

	StructA *ptheA = &theA;

	ptheA->a = 3;
	ptheA->b = 4;

	print("theA.a=%i\ntheA.b=%i", theA.a, theA.b);
	print("ptheA->a=%i\nptheA->b=%i", ptheA->a, ptheA->b);

结果输出：

解析：

SharpC.Grammar.Variable:	Line: 192 Pos: 1 "theA;"
SharpC.Grammar.Statement:	Line: 194 Pos: 1 "theA.a = 1;"
SharpC.Grammar.Statement:	Line: 195 Pos: 1 "theA.b = 2;"
SharpC.Grammar.Statement:	Line: 197 Pos: 1 "print("theA.a=%i\ntheA.b=%i", theA.a, theA.b);"
SharpC.Grammar.Variable:	Line: 199 Pos: 1 "ptheA = &theA;"
SharpC.Grammar.Statement:	Line: 199 Pos: 1 "ptheA = &theA;"
SharpC.Grammar.Statement:	Line: 201 Pos: 1 "ptheA->a = 3;"
SharpC.Grammar.Statement:	Line: 202 Pos: 1 "ptheA->b = 4;"
SharpC.Grammar.Statement:	Line: 204 Pos: 1 "print("theA.a=%i\ntheA.b=%i", theA.a, theA.b);"
SharpC.Grammar.Statement:	Line: 205 Pos: 1 "print("ptheA->a=%i\nptheA->b=%i", ptheA->a, ptheA->b);"

运行：

Declare [struct StructA "theA"] Address: 0x000001D0 Size: 8
	Exp: [theA . (* int )[0x00000000]] Result: [(* int )[0x000001D0]]
	Exp: [(* int )[0x000001D0] = 1] Result: [(* int )[0x000001D0]]
	Exp: [theA . (* int )[0x00000004]] Result: [(* int )[0x000001D4]]
	Exp: [(* int )[0x000001D4] = 2] Result: [(* int )[0x000001D4]]
	Exp: [theA . (* int )[0x00000000]] Result: [(* int )[0x000001D0]]
	Exp: [theA . (* int )[0x00000004]] Result: [(* int )[0x000001D4]]
Call function [void  "print"] with [3] parameters
Declare [char *  "$var_char_ptr_161$"] Address: 0x00000194 Size: 4
Declare [int  "$var_int_162$"] Address: 0x000001B8 Size: 4
Declare [int  "$var_int_163$"] Address: 0x000001B0 Size: 4
	Set parameter [char *  "$var_char_ptr_161$"] = 64
	Set parameter [int  "$var_int_162$"] = 1
	Set parameter [int  "$var_int_163$"] = 2
print("theA.a=%i\ntheA.b=%i",1,2)
Output of print:
"theA.a=1\ntheA.b=2"
Free function "print"'s arguments, count: 3
	Free argument [char *  "$var_char_ptr_161$"] Address: 0x00000194 Size: 4
	Free argument [int  "$var_int_162$"] Address: 0x000001B8 Size: 4
	Free argument [int  "$var_int_163$"] Address: 0x000001B0 Size: 4
All arguments are freed.
Declare [struct * StructA "ptheA"] Address: 0x000001A0 Size: 4
	Exp: [theA & ] Result: [464]
	Exp: [ptheA = 464] Result: [ptheA]
	Exp: [ptheA -> (* int )[0x00000000]] Result: [(* int )[0x000001D0]]
	Exp: [(* int )[0x000001D0] = 3] Result: [(* int )[0x000001D0]]
	Exp: [ptheA -> (* int )[0x00000004]] Result: [(* int )[0x000001D4]]
	Exp: [(* int )[0x000001D4] = 4] Result: [(* int )[0x000001D4]]
	Exp: [theA . (* int )[0x00000000]] Result: [(* int )[0x000001D0]]
	Exp: [theA . (* int )[0x00000004]] Result: [(* int )[0x000001D4]]
Call function [void  "print"] with [3] parameters
Declare [char *  "$var_char_ptr_164$"] Address: 0x000001A4 Size: 4
Declare [int  "$var_int_165$"] Address: 0x000001C4 Size: 4
Declare [int  "$var_int_166$"] Address: 0x0000019C Size: 4
	Set parameter [char *  "$var_char_ptr_164$"] = 36
	Set parameter [int  "$var_int_165$"] = 3
	Set parameter [int  "$var_int_166$"] = 4
print("theA.a=%i\ntheA.b=%i",3,4)
Output of print:
"theA.a=3\ntheA.b=4"
Free function "print"'s arguments, count: 3
	Free argument [char *  "$var_char_ptr_164$"] Address: 0x000001A4 Size: 4
	Free argument [int  "$var_int_165$"] Address: 0x000001C4 Size: 4
	Free argument [int  "$var_int_166$"] Address: 0x0000019C Size: 4
All arguments are freed.
	Exp: [ptheA -> (* int )[0x00000000]] Result: [(* int )[0x000001D0]]
	Exp: [ptheA -> (* int )[0x00000004]] Result: [(* int )[0x000001D4]]
Call function [void  "print"] with [3] parameters
Declare [char *  "$var_char_ptr_167$"] Address: 0x00000184 Size: 4
Declare [int  "$var_int_168$"] Address: 0x00000198 Size: 4
Declare [int  "$var_int_169$"] Address: 0x000001D8 Size: 4
	Set parameter [char *  "$var_char_ptr_167$"] = 4
	Set parameter [int  "$var_int_168$"] = 3
	Set parameter [int  "$var_int_169$"] = 4
print("ptheA->a=%i\nptheA->b=%i",3,4)
Output of print:
"ptheA->a=3\nptheA->b=4"
Free function "print"'s arguments, count: 3
	Free argument [char *  "$var_char_ptr_167$"] Address: 0x00000184 Size: 4
	Free argument [int  "$var_int_168$"] Address: 0x00000198 Size: 4
	Free argument [int  "$var_int_169$"] Address: 0x000001D8 Size: 4
All arguments are freed.

更深入的测试未进行。

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