Kaleidoscope/Chapter2/toy.cpp

33   static int LastChar = ' ';
36   while (isspace(LastChar))
37     LastChar = getchar();
39   if (isalpha(LastChar)) { // identifier: [a-zA-Z][a-zA-Z0-9]*
40     IdentifierStr = LastChar;
41     while (isalnum((LastChar = getchar())))
42       IdentifierStr += LastChar;
51   if (isdigit(LastChar) || LastChar == '.') { // Number: [0-9.]+
54       NumStr += LastChar;
55       LastChar = getchar();
56     } while (isdigit(LastChar) || LastChar == '.');
62   if (LastChar == '#') {
65       LastChar = getchar();
66     while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
68     if (LastChar != EOF)
73   if (LastChar == EOF)
77   int ThisChar = LastChar;
78   LastChar = getchar();