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Verbose tracing shows lexed and captured values (#1969)

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This commit is contained in:
Rangi
2026-05-09 12:01:29 -04:00
committed by GitHub
parent 57111b219a
commit c50a849757
1 changed files with 60 additions and 4 deletions
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src/asm/lexer.cpp
+60 -4
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@@ -2262,6 +2262,36 @@ static Token yylex_SKIP_TO_ENDR() {
}
}
// LCOV_EXCL_START
static void verboseOutputString(std::string_view str) {
static constexpr size_t max_len = 40;
putc('"', stderr);
for (size_t i = 0, n = str.length(); i < n; ++i) {
if (n > max_len && i == max_len / 2) {
fputs("[...]", stderr);
i = n - max_len / 2 - 1;
continue;
}
if (char c = str[i]; c == '\\') {
fputs("\\\\", stderr);
} else if (c == '"') {
fputs("\\\"", stderr);
} else if (c == '\n') {
fputs("\\n", stderr);
} else if (c == '\r') {
fputs("\\r", stderr);
} else if (c == '\t') {
fputs("\\t", stderr);
} else if (isPrintable(c)) {
putc(c, stderr);
} else {
fprintf(stderr, "\\x%02X", c);
}
}
putc('"', stderr);
}
// LCOV_EXCL_STOP
yy::parser::symbol_type yylex() {
if (lexerState->atLineStart && lexerStateEOL) {
lexerState = lexerStateEOL;
@@ -2290,15 +2320,31 @@ yy::parser::symbol_type yylex() {
lexerState->lastToken = token.type;
lexerState->atLineStart = token.type == T_(NEWLINE) || token.type == T_(EOB);
// LCOV_EXCL_START
verbosePrint(VERB_TRACE, "Lexed `%s` token\n", yy::parser::symbol_type(token.type).name());
// LCOV_EXCL_STOP
if (std::holds_alternative<uint32_t>(token.value)) {
// LCOV_EXCL_START
verbosePrint(
VERB_TRACE,
"Lexed `%s` token (0x%" PRIX32 ")\n",
yy::parser::symbol_type(token.type).name(),
std::get<uint32_t>(token.value)
);
// LCOV_EXCL_STOP
return yy::parser::symbol_type(token.type, std::get<uint32_t>(token.value));
} else if (std::holds_alternative<std::string>(token.value)) {
// LCOV_EXCL_START
if (checkVerbosity(VERB_TRACE)) {
style_Set(stderr, STYLE_MAGENTA, false);
fprintf(stderr, "Lexed `%s` token (", yy::parser::symbol_type(token.type).name());
verboseOutputString(std::get<std::string>(token.value));
fputs(")\n", stderr);
style_Reset(stderr);
}
// LCOV_EXCL_STOP
return yy::parser::symbol_type(token.type, std::get<std::string>(token.value));
} else {
// LCOV_EXCL_START
verbosePrint(VERB_TRACE, "Lexed `%s` token\n", yy::parser::symbol_type(token.type).name());
// LCOV_EXCL_STOP
assume(std::holds_alternative<std::monostate>(token.value));
return yy::parser::symbol_type(token.type);
}
@@ -2349,6 +2395,16 @@ static Capture makeCapture(char const *name, CallbackFnT callback) {
}
}
// LCOV_EXCL_START
if (checkVerbosity(VERB_TRACE) && capture.span.ptr) {
style_Set(stderr, STYLE_MAGENTA, false);
fprintf(stderr, "Captured %s (", name);
verboseOutputString(std::string_view{capture.span.ptr.get(), capture.span.size});
fputs(")\n", stderr);
style_Reset(stderr);
}
// LCOV_EXCL_STOP
assume(!lexerState->atLineStart); // `skipToLeadingKeyword` moves past the start of the line
lexerState->capturing = false;