diff options
Diffstat (limited to 'src/lua51/lobject.h')
| -rw-r--r-- | src/lua51/lobject.h | 39 |
1 files changed, 32 insertions, 7 deletions
diff --git a/src/lua51/lobject.h b/src/lua51/lobject.h index 4e9daee..ead9391 100644 --- a/src/lua51/lobject.h +++ b/src/lua51/lobject.h @@ -242,14 +242,14 @@ typedef struct Proto { CommonHeader; //c 常量表，能看出来lua保存常量的单元是函数原型，所有代码片段都会被编译为proto TValue *k; /* constants used by the function */ - //c 函数字节码 + //c 函数字节码起始点 Instruction *code; //c 内部函数 struct Proto **p; /* functions defined inside the function */ int *lineinfo; /* map from opcodes to source lines */ //c 局部变量 struct LocVar *locvars; /* information about local variables */ - //c upvalue + //c upvalues TString **upvalues; /* upvalue names */ TString *source; //文件名 int sizeupvalues; @@ -262,9 +262,9 @@ typedef struct Proto { int lastlinedefined; GCObject *gclist; lu_byte nups; /* number of upvalues */ - lu_byte numparams; - lu_byte is_vararg; - lu_byte maxstacksize; + lu_byte numparams; //c 参数个数 + lu_byte is_vararg; //c 是否是可变参数... + lu_byte maxstacksize; //c 最大栈大小, 通常200 } Proto; @@ -286,10 +286,35 @@ typedef struct LocVar { /* ** Upvalues */ -// 判断upvalue是关闭的方式是 uv->v == &uv->u.value +//c 判断upvalue是关闭的方式是 uv->v == &uv->u.value +//c upvalue有开闭的概念 +//c 开是指upvalue完全由此方法所有，之前的调用已经结束 +//c 关闭是指upvalue还在之前的栈上 +/* +* function func() +* local a = 10; +* local b = function() +* a = a + 1 +* print(a) +* end +* b() -- 这个是开 +* end +* +* function func() +* local a = 10; +* local b = function() +* a = a + 1 +* print(a) +* end +* return b +* end +* +* fn = func() +* fn() -- 这个是关 +*/ typedef struct UpVal { CommonHeader; - TValue *v; /* points to stack or to its own value */ + TValue *v; /* points to stack or to its own value */ //c upvalue的栈地址 union { TValue value; /* the value (when closed) */ struct { /* double linked list (when open) */ |