[config] lab 1.
[output] lexer got symbol: TOK_IDENTIFIER (1, 1).
[output] lexer got symbol: TOK_INTEGER (1, 5).
[output] lexer got symbol: TOK_IF (2, 1).
[output] lexer got symbol: TOK_WHILE (2, 4).
[output] lexer got symbol: TOK_FLOAT (2, 10).
[error] invalid token.
[output] lexer got symbol: "invalid token" (2, 14).
[output] lexer got symbol: "end of file" (3, 1).