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<H3> Tests on tree expressions of level 1 </H3>
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<P>
<A NAME="IDX254"></A>
<DL>
<DT><U>Function:</U> bool <B>ap_texpr1_equal</B> <I>(ap_texpr1_t* <VAR>e1</VAR>, ap_texpr1_t* <VAR>e2</VAR>)</I>
<DD>Structural (recursive) equality
</DL>
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<A NAME="IDX255"></A>
<DL>
<DT><U>Function:</U> bool <B>ap_texpr1_has_var</B> <I>(ap_texpr1_t* <VAR>e</VAR>, ap_var_t <VAR>var</VAR>)</I>
<DD>Return true if variable <VAR>var</VAR> appears in the expression.
</DL>
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The next functions classifies tree expressions.
<A NAME="IDX256"></A>
<DL>
<DT><U>Function:</U> bool <B>ap_texpr1_is_interval_cst</B> <I>(ap_texpr1_t* <VAR>e</VAR>)</I>
<DD>No variable, only constant leaves
</DL>
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<A NAME="IDX257"></A>
<DL>
<DT><U>Function:</U> bool <B>ap_texpr1_is_interval_linear</B> <I>(ap_texpr1_t* <VAR>e</VAR>)</I>
<DD>Linear with possibly interval coefficients, no rounding
</DL>
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<DL>
<DT><U>Function:</U> bool <B>ap_texpr1_is_interval_polynomial</B> <I>(ap_texpr1_t* <VAR>e</VAR>)</I>
<DD>Polynomial with possibly interval coefficients, no rounding
</DL>
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<A NAME="IDX259"></A>
<DL>
<DT><U>Function:</U> bool <B>ap_texpr1_is_interval_polyfrac</B> <I>(ap_texpr1_t* <VAR>e</VAR>)</I>
<DD>Polynomial fraction with possibly interval coefficients, no rounding
</DL>
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<A NAME="IDX260"></A>
<DL>
<DT><U>Function:</U> bool <B>ap_texpr1_is_scalar</B> <I>(ap_texpr1_t* <VAR>e</VAR>)</I>
<DD>All coefficients are scalar (non-interval)@end deftypefun
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