swilly22

function Query_Execute() {
	/* Call ExecutionPlan_Execute on a different thread 
	 * and wait for it to exit */
	char *error = NULL;
	pthread_t thread;
	pthread_create(&thread, NULL, ExecutionPlan_Execute, NULL);
	pthread_join(thread, &error);
	
	if(error != NULL) {
		// Exception been thrown.

swilly22

function A() {
	jump there;	// Can't jump outside of current scope.
}

function B() {
there:
	...
}

swilly22

try {
  // Perform work which might throw an exception
  work();
} catch (error *e) {
  reportError(e);
}

swilly22

if(cond) {
	raise Exception("something went wrong")
}

swilly22

uint64_t dictStringHash(const void *key) {
    return dictGenHashFunction(key, strlen(key));
}

void *dictStringDup(void *privdata, const void *key) {
    DICT_NOTUSED(privdata);
    size_t key_len = strlen(key);
    char *copy = malloc((key_len + 1) * sizeof(char));
    strcpy(copy, key);
    copy[key_len] = 0;

swilly22

// (exp)
arithmetic_expression ::= LEFT_PARENTHESIS arithmetic_expression RIGHT_PARENTHESIS.
// exp + exp
arithmetic_expression ::= arithmetic_expression binary_operator arithmetic_expression.
// func(exp)
arithmetic_expression ::= STRING LEFT_PARENTHESIS arithmetic_expression_list RIGHT_PARENTHESIS.
// 9
arithmetic_expression ::= value.
// friend.age
arithmetic_expression ::= variable.

swilly22

Evaluate(root) {
  if(node_is_const(root)) {
    return root.value;
  }

  for(child in root) {
    evaluate(child);
  }

  return root.op(root.children);

swilly22

exp:    exp op exp
exp:    '(' exp ')'
exp:    number
op:     +
        -
        *
        /

swilly22

exp:    exp op exp
exp:    '(' exp ')'
exp:    number
op:     +
        -
        *
        /