Поддержка унарных операций
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@ -411,6 +411,16 @@ public final class Parser {
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}
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private Expression expression() {
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return unary();
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}
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private Expression unary() {
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if (match(TokenType.MINUS)) {
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return new ValueExpression( -primary().eval() );
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}
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if (match(TokenType.PLUS)) {
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return primary();
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}
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return primary();
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}
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