/*
* function
* : modifiers "fun" typeParameters?
* (type "." | attributes)?
* SimpleName
* typeParameters? functionParameters (":" type)?
* typeConstraints
* functionBody?
* ;
*/
IElementType parseFunction() {
assert _at(FUN_KEYWORD);
advance(); // FUN_KEYWORD
// Recovery for the case of class A { fun| }
if (at(RBRACE)) {
error("Function body expected");
return FUN;
}
boolean typeParameterListOccurred = false;
if (at(LT)) {
parseTypeParameterList(TokenSet.create(LBRACKET, LBRACE, LPAR));
typeParameterListOccurred = true;
}
myBuilder.disableJoiningComplexTokens();
int lastDot = findLastBefore(RECEIVER_TYPE_TERMINATORS, TokenSet.create(LPAR), true);
TokenSet functionNameFollow = TokenSet.create(LT, LPAR, COLON, EQ);
parseReceiverType("function", functionNameFollow, lastDot);
parseFunctionOrPropertyName(lastDot != -1, "function", functionNameFollow);
myBuilder.restoreJoiningComplexTokensState();
TokenSet valueParametersFollow = TokenSet.create(COLON, EQ, LBRACE, SEMICOLON, RPAR);
if (at(LT)) {
PsiBuilder.Marker error = mark();
parseTypeParameterList(TokenSet.orSet(TokenSet.create(LPAR), valueParametersFollow));
errorIf(
error,
typeParameterListOccurred,
"Only one type parameter list is allowed for a function");
typeParameterListOccurred = true;
}
if (at(LPAR)) {
parseValueParameterList(false, valueParametersFollow);
} else {
error("Expecting '('");
}
if (at(COLON)) {
advance(); // COLON
if (!parseIdeTemplate()) {
parseTypeRef();
}
}
parseTypeConstraintsGuarded(typeParameterListOccurred);
if (at(SEMICOLON)) {
advance(); // SEMICOLON
} else if (at(EQ) || at(LBRACE)) {
parseFunctionBody();
}
return FUN;
}
