public String getExpectedText(PsiBuilder builder) {
int position = builder.rawTokenIndex();
StringBuilder sb = new StringBuilder();
if (addExpected(sb, position, true)) {
sb.append(" expected, ");
}
return sb.toString();
}
private static void addVariant(PsiBuilder builder, ErrorState state, Object o) {
builder.eof(); // skip whitespaces
addVariantInner(state, builder.rawTokenIndex(), o);
CompletionState completionState = state.completionState;
if (completionState != null && state.predicateSign) {
addCompletionVariant(builder, completionState, o);
}
}
public static void report_error_(PsiBuilder builder, ErrorState state, boolean advance) {
Frame frame = state.frameStack.isEmpty() ? null : state.frameStack.getLast();
if (frame == null) {
LOG.error("unbalanced enter/exit section call: got null");
return;
}
int position = builder.rawTokenIndex();
if (frame.errorReportedAt < position && getLastVariantPos(state, position + 1) <= position) {
reportError(builder, state, frame, null, true, advance);
}
}
public Frame init(
PsiBuilder builder, ErrorState state, int level_, int modifiers_, String name_) {
offset = builder.getCurrentOffset();
position = builder.rawTokenIndex();
level = level_;
modifiers = modifiers_;
name = name_;
variantCount = state.variants.size();
errorReportedAt = -1;
Frame prev = state.frameStack.peekLast();
errorReportedAtPrev = prev == null ? -1 : prev.errorReportedAt;
leftMarker = null;
return this;
}
private static boolean reportError(
PsiBuilder builder,
ErrorState state,
Frame frame,
IElementType elementType,
boolean force,
boolean advance) {
String expectedText = state.getExpectedText(builder);
boolean notEmpty = StringUtil.isNotEmpty(expectedText);
if (force || notEmpty || advance) {
String gotText =
builder.eof()
? "unexpected end of file"
: notEmpty
? "got '" + builder.getTokenText() + "'"
: "'" + builder.getTokenText() + "' unexpected";
String message = expectedText + gotText;
if (advance) {
PsiBuilder.Marker mark = builder.mark();
builder.advanceLexer();
mark.error(message);
} else if (!force) {
PsiBuilder.Marker extensionMarker = null;
IElementType extensionTokenType = null;
PsiBuilderImpl.ProductionMarker latestDoneMarker =
elementType == null
? null
: (PsiBuilderImpl.ProductionMarker) builder.getLatestDoneMarker();
if (latestDoneMarker != null
&& frame.position >= latestDoneMarker.getStartIndex()
&& frame.position <= latestDoneMarker.getEndIndex()) {
extensionMarker = ((PsiBuilder.Marker) latestDoneMarker).precede();
extensionTokenType = latestDoneMarker.getTokenType();
((PsiBuilder.Marker) latestDoneMarker).drop();
}
builder.error(message);
if (extensionMarker != null) extensionMarker.done(extensionTokenType);
} else {
builder.error(message);
}
builder.eof(); // skip whitespaces
frame.errorReportedAt = builder.rawTokenIndex();
return true;
}
return false;
}
public static boolean nextTokenIs(PsiBuilder builder, String frameName, IElementType... tokens) {
ErrorState state = ErrorState.get(builder);
if (state.completionState != null) return true;
boolean track = !state.suppressErrors && state.predicateCount < 2 && state.predicateSign;
if (!track) return nextTokenIsFast(builder, tokens);
IElementType tokenType = builder.getTokenType();
if (StringUtil.isNotEmpty(frameName)) {
addVariantInner(state, builder.rawTokenIndex(), frameName);
} else {
for (IElementType token : tokens) {
addVariant(builder, state, token);
}
}
if (tokenType == null) return false;
for (IElementType token : tokens) {
if (tokenType == token) return true;
}
return false;
}
public Frame init(
PsiBuilder builder,
ErrorState state,
int level_,
int modifiers_,
IElementType elementType_,
String name_) {
parentFrame = state.currentFrame;
elementType = elementType_;
offset = builder.getCurrentOffset();
position = builder.rawTokenIndex();
level = level_;
modifiers = modifiers_;
name = name_;
variantCount = state.variants.size();
errorReportedAt = -1;
leftMarker = null;
return this;
}
public static int current_position_(PsiBuilder builder) {
return builder.rawTokenIndex();
}
private static void exit_section_impl_(
ErrorState state,
Frame frame,
PsiBuilder builder,
@Nullable IElementType elementType,
boolean result,
boolean pinned,
@Nullable Parser eatMore) {
int initialPos = builder.rawTokenIndex();
boolean willFail = !result && !pinned;
if (willFail
&& initialPos == frame.position
&& state.lastExpectedVariantPos == frame.position
&& frame.name != null
&& state.variants.size() - frame.variantCount > 1) {
state.clearVariants(true, frame.variantCount);
addVariantInner(state, initialPos, frame.name);
}
int lastErrorPos = getLastVariantPos(state, initialPos);
if (!state.suppressErrors && eatMore != null) {
state.suppressErrors = true;
final boolean eatMoreFlagOnce = !builder.eof() && eatMore.parse(builder, frame.level + 1);
boolean eatMoreFlag =
eatMoreFlagOnce
|| !result && frame.position == initialPos && lastErrorPos > frame.position;
PsiBuilderImpl.ProductionMarker latestDoneMarker =
(pinned || result) && (state.altMode || elementType != null) && eatMoreFlagOnce
? (PsiBuilderImpl.ProductionMarker) builder.getLatestDoneMarker()
: null;
PsiBuilder.Marker extensionMarker = null;
IElementType extensionTokenType = null;
// whitespace prefix makes the very first frame offset bigger than marker start offset which
// is always 0
if (latestDoneMarker != null
&& frame.position >= latestDoneMarker.getStartIndex()
&& frame.position <= latestDoneMarker.getEndIndex()) {
extensionMarker = ((PsiBuilder.Marker) latestDoneMarker).precede();
extensionTokenType = latestDoneMarker.getTokenType();
((PsiBuilder.Marker) latestDoneMarker).drop();
}
// advance to the last error pos
// skip tokens until lastErrorPos. parseAsTree might look better here...
int parenCount = 0;
while ((eatMoreFlag || parenCount > 0) && builder.rawTokenIndex() < lastErrorPos) {
if (state.braces != null) {
if (builder.getTokenType() == state.braces[0].getLeftBraceType()) parenCount++;
else if (builder.getTokenType() == state.braces[0].getRightBraceType()) parenCount--;
}
builder.advanceLexer();
eatMoreFlag = eatMore.parse(builder, frame.level + 1);
}
boolean errorReported =
frame.errorReportedAt == initialPos || !result && frame.errorReportedAt >= frame.position;
if (errorReported) {
if (eatMoreFlag) {
builder.advanceLexer();
parseAsTree(state, builder, frame.level + 1, DUMMY_BLOCK, true, TOKEN_ADVANCER, eatMore);
}
} else if (eatMoreFlag) {
errorReported = reportError(builder, state, frame, null, true, true);
parseAsTree(state, builder, frame.level + 1, DUMMY_BLOCK, true, TOKEN_ADVANCER, eatMore);
} else if (eatMoreFlagOnce
|| (!result && frame.position != builder.rawTokenIndex())
|| frame.errorReportedAt > initialPos) {
errorReported = reportError(builder, state, frame, null, true, false);
}
if (extensionMarker != null) {
extensionMarker.done(extensionTokenType);
}
state.suppressErrors = false;
if (errorReported || result) {
state.clearVariants(true, 0);
state.clearVariants(false, 0);
state.lastExpectedVariantPos = -1;
}
} else if (!result && pinned && frame.errorReportedAt < 0) {
// do not report if there are errors beyond current position
if (lastErrorPos == initialPos) {
// do not force, inner recoverRoot might have skipped some tokens
reportError(builder, state, frame, elementType, false, false);
} else if (lastErrorPos > initialPos) {
// set error pos here as if it is reported for future reference
frame.errorReportedAt = lastErrorPos;
}
}
// propagate errorReportedAt up the stack to avoid duplicate reporting
Frame prevFrame = willFail && eatMore == null ? null : state.frameStack.peekLast();
if (prevFrame != null && prevFrame.errorReportedAt < frame.errorReportedAt) {
prevFrame.errorReportedAt = frame.errorReportedAt;
}
}
