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Shell: Make Parser::expect() revert the offset when matching fails

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AnotherTest 2020-09-14 19:31:47 +04:30 • committed by Andreas Kling
parent afe0ae586c
commit 53b85bcdd0
1 changed files with 5 additions and 1 deletions
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6
Shell/Parser.cpp
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@ -58,12 +58,16 @@ bool Parser::expect(char ch)
bool Parser::expect(const StringView& expected) bool Parser::expect(const StringView& expected)
{ {
auto offset_at_start = m_offset;
if (expected.length() + m_offset > m_input.length()) if (expected.length() + m_offset > m_input.length())
return false; return false;
for (size_t i = 0; i < expected.length(); ++i) { for (size_t i = 0; i < expected.length(); ++i) {
if (peek() != expected[i]) if (peek() != expected[i]) {
m_offset = offset_at_start;
return false; return false;
}
consume(); consume();
} }