return Tok;
}
+static bool expect(ArrayRef<StringRef> &Tokens, StringRef S) {
+ if (Tokens.empty()) {
+ error(S + " expected");
+ return false;
+ }
+ StringRef Tok = Tokens.front();
+ if (Tok != S) {
+ error(S + " expected, but got " + Tok);
+ return false;
+ }
+ Tokens = Tokens.slice(1);
+ return true;
+}
+
static uint64_t parseExpr(ArrayRef<StringRef> &Tokens, uint64_t Dot);
// This is a part of the operator-precedence parser to evaluate
return Dot;
if (Tok == "(") {
uint64_t V = parseExpr(Tokens, Dot);
- if (Tokens.empty()) {
- error(") expected");
- } else {
- Tok = next(Tokens);
- if (Tok != ")")
- error(") expected, but got " + Tok);
- }
+ if (!expect(Tokens, ")"))
+ return 0;
return V;
}
return getInteger(Tok);