transCharLiteral

fn transCharLiteral(
    t: *Translator,
    scope: *Scope,
    literal_index: Node.Index,
    used: ResultUsed,
    suppress_as: SuppressCast,
) TransError!ZigNode

File

Code

fn transCharLiteral(
    t: *Translator,
    scope: *Scope,
    literal_index: Node.Index,
    used: ResultUsed,
    suppress_as: SuppressCast,
) TransError!ZigNode {
    if (try t.checkLiteralMacro(literal_index.tok(t.tree), used)) |node| return node;
    const val = t.tree.value_map.get(literal_index).?;
    const char_literal = literal_index.get(t.tree).char_literal;
    const narrow = char_literal.kind == .ascii or char_literal.kind == .utf8;

    // C has a somewhat obscure feature called multi-character character constant
    // e.g. 'abcd'
    const int_value = val.toInt(u32, t.comp).?;
    const int_lit_node = if (char_literal.kind == .ascii and int_value > 255)
        try t.createNumberNode(int_value)
    else
        try t.createCharLiteralNode(narrow, int_value);

    if (suppress_as == .no_as) {
        return t.maybeSuppressResult(used, int_lit_node);
    }

    // See comment in `transIntLiteral` for why this code is here.
    // @as(T, x)
    const as_node = try ZigTag.as.create(t.arena, .{
        .lhs = try t.transType(scope, char_literal.qt, char_literal.literal_tok),
        .rhs = int_lit_node,
    });
    return t.maybeSuppressResult(used, as_node);
}