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Parser error message reports both the line number and the cursor position. (#4954)

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This commit is contained in:
Vladimir Glavnyy
2018-10-02 04:57:36 +07:00
committed by Wouter van Oortmerssen
parent bf871ffd7f
commit 7e711f80d7
2 changed files with 28 additions and 9 deletions
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20
include/flatbuffers/idl.h
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@@ -477,10 +477,28 @@ struct IDLOptions {
// This encapsulates where the parser is in the current source file.
struct ParserState {
ParserState() : cursor_(nullptr), line_(1), token_(-1) {}
ParserState()
: cursor_(nullptr), line_start_(nullptr), line_(0), token_(-1) {}
protected:
void ResetState(const char *source) {
cursor_ = source;
line_ = 0;
MarkNewLine();
}
void MarkNewLine() {
line_start_ = cursor_;
line_ += 1;
}
int64_t CursorPosition() const {
FLATBUFFERS_ASSERT(cursor_ && line_start_ && cursor_ >= line_start_);
return static_cast<int64_t>(cursor_ - line_start_);
}
const char *cursor_;
const char *line_start_;
int line_; // the current line being parsed
int token_;