This is some simple project (VS 2013) when I am learning the compiler principles.
All the grammers are follow the C language.
The lex module, input the source code and ouput the tokens.
For example, you the code you input:
char str[256];
int a=0,b=0,c=0;
int main()
{
gets(str);
for(;str[a]!='\0';a++)
{
if(str[a]==' ')
{
c=0;
}
}
printf("%d",b);
return 0;
}
the output will be:
char identifier[integer constant];
int identifier=integer constant,identifier=integer constant,identifier=integer constant;
int identifier()
{
identifier(identifier);
for(;identifier[identifier]!=string constant;identifier++)
{
if(identifier[identifier]==string constant)
{
identifier=integer constant;
}
else if(identifier==integer constant)
{
identifier=integer constant;
identifier++;
}
}
identifier(string constant,identifier);
return integer constant;
}
the declation module to analysis the variable declare and record the information of variable.
also there have some syntax check in the program.
For example you input the source code:
int xx;
int x;
short y;
int a(int a, int b)
{
int c;
int d;
int a;
};
the result of analysis will be:
DBG_Decl_Information： Name: xx hash:17760
scope:0 type:int size:
DBG_Decl_Information： Name: x hash:120
scope:0 type:int size:
DBG_Decl_Information： Name: y hash:121
scope:0 type:int size:short
DBG_Decl_Information： Name: a hash:97
scope:0 type:int size:
DBG_Decl_Information： Name: a hash:97
scope:1 type:int size:
DBG_Decl_Information： Name: b hash:98
scope:1 type:int size:
DBG_Decl_Information： Name: c hash:99
scope:1 type:int size:
DBG_Decl_Information： Name: d hash:100
scope:1 type:int size:
ERROR in line:9 Redeclaration
Analysis the expression and output the syntax tree with the jOrgChart
The input is a expression like this:
a = b = a+b, c = 1/a+3/b;
The output tree is:
