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More precise translation of char literals

master
LemonBoy 2019-04-20 11:25:57 +02:00
parent ab424bbb35
commit 8d05330cf7
1 changed files with 26 additions and 7 deletions
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31
src/translate_c.cpp
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@ -1335,14 +1335,33 @@ static AstNode *trans_floating_literal(Context *c, ResultUsed result_used, const
}
static AstNode *trans_character_literal(Context *c, ResultUsed result_used, const clang::CharacterLiteral *stmt) {
clang::Expr::EvalResult result;
if (!stmt->EvaluateAsInt(result, *reinterpret_cast<clang::ASTContext *>(c->ctx))) {
emit_warning(c, bitcast(stmt->getBeginLoc()), "invalid character literal");
switch (stmt->getKind()) {
case clang::CharacterLiteral::CharacterKind::Ascii:
{
unsigned val = stmt->getValue();
// C has a somewhat obscure feature called multi-character character
// constant
if (val > 255)
return trans_create_node_unsigned(c, val);
}
// fallthrough
case clang::CharacterLiteral::CharacterKind::UTF8:
{
AstNode *node = trans_create_node(c, NodeTypeCharLiteral);
node->data.char_literal.value = stmt->getValue();
return maybe_suppress_result(c, result_used, node);
}
case clang::CharacterLiteral::CharacterKind::UTF16:
emit_warning(c, bitcast(stmt->getBeginLoc()), "TODO support UTF16 character literals");
return nullptr;
case clang::CharacterLiteral::CharacterKind::UTF32:
emit_warning(c, bitcast(stmt->getBeginLoc()), "TODO support UTF32 character literals");
return nullptr;
case clang::CharacterLiteral::CharacterKind::Wide:
emit_warning(c, bitcast(stmt->getBeginLoc()), "TODO support wide character literals");
return nullptr;
}
AstNode *node = trans_create_node(c, NodeTypeCharLiteral);
node->data.char_literal.value = result.Val.getInt().getExtValue();
return maybe_suppress_result(c, result_used, node);
zig_unreachable();
}
static AstNode *trans_constant_expr(Context *c, ResultUsed result_used, const clang::ConstantExpr *expr) {