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<a name="rasqal-section-expression"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="rasqal-section-expression.top_of_page"></a>Expressions</span></h2>
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<p>Expressions — Query language expressions.</p>
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<div class="refsynopsisdiv">
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<a name="rasqal-section-expression.synopsis"></a><h2>Synopsis</h2>
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<pre class="synopsis">
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typedef <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>;
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enum <a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a>;
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enum <a class="link" href="rasqal-section-expression.html#rasqal-compare-flags" title="enum rasqal_compare_flags">rasqal_compare_flags</a>;
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enum <a class="link" href="rasqal-section-expression.html#rasqal-pattern-flags" title="enum rasqal_pattern_flags">rasqal_pattern_flags</a>;
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-0op-expression" title="rasqal_new_0op_expression ()">rasqal_new_0op_expression</a> (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-1op-expression" title="rasqal_new_1op_expression ()">rasqal_new_1op_expression</a> (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-2op-expression" title="rasqal_new_2op_expression ()">rasqal_new_2op_expression</a> (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg1,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg2);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-3op-expression" title="rasqal_new_3op_expression ()">rasqal_new_3op_expression</a> (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg1,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg2,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg3);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-cast-expression" title="rasqal_new_cast_expression ()">rasqal_new_cast_expression</a> (<a
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href="/usr/share/gtk-doc/html/raptor/raptor-section-uri.html#raptor-uri"
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>raptor_uri</a> *name,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *value);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-function-expression" title="rasqal_new_function_expression ()">rasqal_new_function_expression</a> (<a
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href="/usr/share/gtk-doc/html/raptor/raptor-section-uri.html#raptor-uri"
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>raptor_uri</a> *name,
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<a
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href="/usr/share/gtk-doc/html/raptor/raptor-section-sequence.html#raptor-sequence"
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>raptor_sequence</a> *args);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-literal-expression" title="rasqal_new_literal_expression ()">rasqal_new_literal_expression</a> (<a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal">rasqal_literal</a> *literal);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-string-op-expression" title="rasqal_new_string_op_expression ()">rasqal_new_string_op_expression</a> (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg1,
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<a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal">rasqal_literal</a> *literal);
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* <a class="link" href="rasqal-section-expression.html#rasqal-new-expression-from-expression" title="rasqal_new_expression_from_expression ()">rasqal_new_expression_from_expression</a>
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(<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e);
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void <a class="link" href="rasqal-section-expression.html#rasqal-free-expression" title="rasqal_free_expression ()">rasqal_free_expression</a> (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e);
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<a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal">rasqal_literal</a>* <a class="link" href="rasqal-section-expression.html#rasqal-expression-evaluate" title="rasqal_expression_evaluate ()">rasqal_expression_evaluate</a> (<a class="link" href="rasqal-section-query.html#rasqal-query" title="rasqal_query">rasqal_query</a> *query,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
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int flags);
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void <a class="link" href="rasqal-section-expression.html#rasqal-expression-print" title="rasqal_expression_print ()">rasqal_expression_print</a> (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
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FILE *fh);
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void <a class="link" href="rasqal-section-expression.html#rasqal-expression-print-op" title="rasqal_expression_print_op ()">rasqal_expression_print_op</a> (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
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FILE *fh);
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int (<a class="link" href="rasqal-section-expression.html#rasqal-expression-visit-fn" title="rasqal_expression_visit_fn ()">*rasqal_expression_visit_fn</a>) (void *user_data,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e);
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int <a class="link" href="rasqal-section-expression.html#rasqal-expression-visit" title="rasqal_expression_visit ()">rasqal_expression_visit</a> (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
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<a class="link" href="rasqal-section-expression.html#rasqal-expression-visit-fn" title="rasqal_expression_visit_fn ()">rasqal_expression_visit_fn</a> fn,
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void *user_data);
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</pre>
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</div>
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<div class="refsect1" lang="en">
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<a name="rasqal-section-expression.description"></a><h2>Description</h2>
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<p>
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Expressions form an expression tree that can be evaluated using
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<a class="link" href="rasqal-section-expression.html#rasqal-expression-evaluate" title="rasqal_expression_evaluate ()"><code class="function">rasqal_expression_evaluate()</code></a> over <a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op"><span class="type">rasqal_op</span></a> operators, <a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal"><span class="type">rasqal_literal</span></a>
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constants and <a class="link" href="rasqal-section-variable.html#rasqal-variable" title="rasqal_variable"><span class="type">rasqal_variable</span></a> values bound in some
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<span class="type">rasqal_query_result</span>. The result is a <a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal"><span class="type">rasqal_literal</span></a> value.
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</p>
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</div>
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<div class="refsect1" lang="en">
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<a name="rasqal-section-expression.details"></a><h2>Details</h2>
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<div class="refsect2" lang="en">
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<a name="rasqal-expression"></a><h3>rasqal_expression</h3>
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<pre class="programlisting">typedef struct rasqal_expression_s rasqal_expression;
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</pre>
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<p>
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expression (arg1), unary op (arg1), binary op (arg1,arg2),
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literal or variable</p>
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<p>
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</p>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="rasqal-op"></a><h3>enum rasqal_op</h3>
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<pre class="programlisting">typedef enum {
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/* internal */
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RASQAL_EXPR_UNKNOWN,
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RASQAL_EXPR_AND,
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RASQAL_EXPR_OR,
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RASQAL_EXPR_EQ,
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RASQAL_EXPR_NEQ,
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RASQAL_EXPR_LT,
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RASQAL_EXPR_GT,
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RASQAL_EXPR_LE,
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RASQAL_EXPR_GE,
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RASQAL_EXPR_UMINUS,
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RASQAL_EXPR_PLUS,
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RASQAL_EXPR_MINUS,
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RASQAL_EXPR_STAR,
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RASQAL_EXPR_SLASH,
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RASQAL_EXPR_REM,
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RASQAL_EXPR_STR_EQ,
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RASQAL_EXPR_STR_NEQ,
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RASQAL_EXPR_STR_MATCH,
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RASQAL_EXPR_STR_NMATCH,
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RASQAL_EXPR_TILDE,
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RASQAL_EXPR_BANG,
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RASQAL_EXPR_LITERAL,
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RASQAL_EXPR_FUNCTION,
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RASQAL_EXPR_BOUND,
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RASQAL_EXPR_STR,
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RASQAL_EXPR_LANG,
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RASQAL_EXPR_DATATYPE,
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RASQAL_EXPR_ISURI,
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RASQAL_EXPR_ISBLANK,
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RASQAL_EXPR_ISLITERAL,
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RASQAL_EXPR_CAST,
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RASQAL_EXPR_ORDER_COND_ASC,
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RASQAL_EXPR_ORDER_COND_DESC,
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RASQAL_EXPR_LANGMATCHES,
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RASQAL_EXPR_REGEX,
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RASQAL_EXPR_GROUP_COND_ASC,
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RASQAL_EXPR_GROUP_COND_DESC,
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RASQAL_EXPR_COUNT,
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RASQAL_EXPR_VARSTAR,
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RASQAL_EXPR_SAMETERM,
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/* internal */
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RASQAL_EXPR_LAST= RASQAL_EXPR_SAMETERM
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} rasqal_op;
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</pre>
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<p>
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Rasqal expression operators. A mixture of unary, binary and
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tertiary operators (string matches). Also includes casting and
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two ordering operators from ORDER BY in SPARQL.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><a name="RASQAL-EXPR-UNKNOWN:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_UNKNOWN</code></span></p></td>
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<td> Internal
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</td>
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</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-AND:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_AND</code></span></p></td>
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<td> Expression for AND(A, B)
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</td>
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</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-OR:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_OR</code></span></p></td>
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<td> Expression for OR(A, B)
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</td>
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</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-EQ:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_EQ</code></span></p></td>
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<td> Expression for A equals B
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</td>
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</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-NEQ:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_NEQ</code></span></p></td>
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<td> Expression for A not equals B.
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</td>
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</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-LT:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_LT</code></span></p></td>
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<td> Expression for A less than B.
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</td>
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</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-GT:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_GT</code></span></p></td>
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<td> Expression for A greather than B.
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</td>
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||
</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-LE:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_LE</code></span></p></td>
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<td> Expression for A less than or equal to B.
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</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-GE:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_GE</code></span></p></td>
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||
<td> Expression for A greater than or equal to B.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-UMINUS:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_UMINUS</code></span></p></td>
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||
<td> Expression for -A.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-PLUS:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_PLUS</code></span></p></td>
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<td> Expression for +A.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-MINUS:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_MINUS</code></span></p></td>
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<td> Expression for A-B.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-STAR:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_STAR</code></span></p></td>
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||
<td> Expression for A*B.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-SLASH:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_SLASH</code></span></p></td>
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||
<td> Expression for A/B.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-REM:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_REM</code></span></p></td>
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||
<td> Expression for A/B remainder.
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||
</td>
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||
</tr>
|
||
<tr>
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||
<td><p><a name="RASQAL-EXPR-STR-EQ:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_STR_EQ</code></span></p></td>
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||
<td> Expression for A string equals B.
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</td>
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</tr>
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<tr>
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<td><p><a name="RASQAL-EXPR-STR-NEQ:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_STR_NEQ</code></span></p></td>
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||
<td> Expression for A string not-equals B.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-STR-MATCH:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_STR_MATCH</code></span></p></td>
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<td> Expression for string A matches literal regex B with flags.
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</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-STR-NMATCH:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_STR_NMATCH</code></span></p></td>
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<td> Expression for string A not-matches literal regex B with flags.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-TILDE:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_TILDE</code></span></p></td>
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||
<td> Expression for binary not A.
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||
</td>
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||
</tr>
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||
<tr>
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||
<td><p><a name="RASQAL-EXPR-BANG:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_BANG</code></span></p></td>
|
||
<td> Expression for logical not A.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-LITERAL:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_LITERAL</code></span></p></td>
|
||
<td> Expression for a <a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal"><span class="type">rasqal_literal</span></a>.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-FUNCTION:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_FUNCTION</code></span></p></td>
|
||
<td> Expression for a function A with arguments (B...).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-BOUND:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_BOUND</code></span></p></td>
|
||
<td> Expression for SPARQL ISBOUND(A).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-STR:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_STR</code></span></p></td>
|
||
<td> Expression for SPARQL STR(A).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-LANG:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_LANG</code></span></p></td>
|
||
<td> Expression for SPARQL LANG(A).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-DATATYPE:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_DATATYPE</code></span></p></td>
|
||
<td> Expression for SPARQL DATATYPE(A).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-ISURI:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_ISURI</code></span></p></td>
|
||
<td> Expression for SPARQL ISURI(A).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-ISBLANK:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_ISBLANK</code></span></p></td>
|
||
<td> Expression for SPARQL ISBLANK(A).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-ISLITERAL:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_ISLITERAL</code></span></p></td>
|
||
<td> Expression for SPARQL ISLITERAL(A).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-CAST:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_CAST</code></span></p></td>
|
||
<td> Expression for cast literal A to type B.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-ORDER-COND-ASC:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_ORDER_COND_ASC</code></span></p></td>
|
||
<td> Expression for SPARQL order condition ascending.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-ORDER-COND-DESC:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_ORDER_COND_DESC</code></span></p></td>
|
||
<td> Expression for SPARQL order condition descending.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-LANGMATCHES:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_LANGMATCHES</code></span></p></td>
|
||
<td> Expression for SPARQL LANGMATCHES(A, B).
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-REGEX:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_REGEX</code></span></p></td>
|
||
<td> Expression for string A matches expression regex B with flags.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-GROUP-COND-ASC:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_GROUP_COND_ASC</code></span></p></td>
|
||
<td> Expression for LAQRS group condition ascending.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-GROUP-COND-DESC:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_GROUP_COND_DESC</code></span></p></td>
|
||
<td> Expression for LAQRS group condition descending.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-COUNT:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_COUNT</code></span></p></td>
|
||
<td> Expression for LAQRS select <code class="function">COUNT()</code>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-VARSTAR:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_VARSTAR</code></span></p></td>
|
||
<td> Expression for LAQRS select Variable *
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-SAMETERM:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_SAMETERM</code></span></p></td>
|
||
<td> Expression for SPARQL sameTerm
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-EXPR-LAST:CAPS"></a><span class="term"><code class="literal">RASQAL_EXPR_LAST</code></span></p></td>
|
||
<td> Internal
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-compare-flags"></a><h3>enum rasqal_compare_flags</h3>
|
||
<pre class="programlisting">typedef enum {
|
||
RASQAL_COMPARE_NOCASE = 1,
|
||
RASQAL_COMPARE_XQUERY = 2,
|
||
RASQAL_COMPARE_RDF = 4,
|
||
RASQAL_COMPARE_URI = 8
|
||
} rasqal_compare_flags;
|
||
</pre>
|
||
<p>
|
||
Flags for <a class="link" href="rasqal-section-expression.html#rasqal-expression-evaluate" title="rasqal_expression_evaluate ()"><code class="function">rasqal_expression_evaluate()</code></a> or <a class="link" href="rasqal-section-literal.html#rasqal-literal-compare" title="rasqal_literal_compare ()"><code class="function">rasqal_literal_compare()</code></a>.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><a name="RASQAL-COMPARE-NOCASE:CAPS"></a><span class="term"><code class="literal">RASQAL_COMPARE_NOCASE</code></span></p></td>
|
||
<td> String comparisons are case independent.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-COMPARE-XQUERY:CAPS"></a><span class="term"><code class="literal">RASQAL_COMPARE_XQUERY</code></span></p></td>
|
||
<td> XQuery comparsion rules apply.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-COMPARE-RDF:CAPS"></a><span class="term"><code class="literal">RASQAL_COMPARE_RDF</code></span></p></td>
|
||
<td> RDF Term comparsion rules apply.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-COMPARE-URI:CAPS"></a><span class="term"><code class="literal">RASQAL_COMPARE_URI</code></span></p></td>
|
||
<td> Allow comparison of URIs
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-pattern-flags"></a><h3>enum rasqal_pattern_flags</h3>
|
||
<pre class="programlisting">typedef enum {
|
||
RASQAL_PATTERN_FLAGS_OPTIONAL=1,
|
||
|
||
RASQAL_PATTERN_FLAGS_LAST=RASQAL_PATTERN_FLAGS_OPTIONAL
|
||
} rasqal_pattern_flags;
|
||
</pre>
|
||
<p>
|
||
Flags for <a class="link" href="rasqal-section-graph-pattern.html#rasqal-graph-pattern" title="rasqal_graph_pattern"><span class="type">rasqal_graph_pattern</span></a>.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><a name="RASQAL-PATTERN-FLAGS-OPTIONAL:CAPS"></a><span class="term"><code class="literal">RASQAL_PATTERN_FLAGS_OPTIONAL</code></span></p></td>
|
||
<td> True when the graph pattern is an optional match.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><a name="RASQAL-PATTERN-FLAGS-LAST:CAPS"></a><span class="term"><code class="literal">RASQAL_PATTERN_FLAGS_LAST</code></span></p></td>
|
||
<td> Internal
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-0op-expression"></a><h3>rasqal_new_0op_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_0op_expression (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op);</pre>
|
||
<p>
|
||
Constructor - create a new 0-operand (constant) expression.
|
||
</p>
|
||
<p>
|
||
The operators are:
|
||
<em class="parameter"><code>RASQAL_EXPR_VARSTAR</code></em>
|
||
</p>
|
||
<p>
|
||
The only operator here is the '*' in COUNT(*) as used by LAQRS.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>op</code></em> :</span></p></td>
|
||
<td> Expression operator
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-1op-expression"></a><h3>rasqal_new_1op_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_1op_expression (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg);</pre>
|
||
<p>
|
||
Constructor - create a new 1-operand expression.
|
||
Takes ownership of the operand expression.
|
||
</p>
|
||
<p>
|
||
The operators are:
|
||
<em class="parameter"><code>RASQAL_EXPR_TILDE</code></em> <em class="parameter"><code>RASQAL_EXPR_BANG</code></em> <em class="parameter"><code>RASQAL_EXPR_UMINUS</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_BOUND</code></em> <em class="parameter"><code>RASQAL_EXPR_STR</code></em> <em class="parameter"><code>RASQAL_EXPR_LANG</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_LANGMATCHES</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_DATATYPE</code></em> <em class="parameter"><code>RASQAL_EXPR_ISURI</code></em> <em class="parameter"><code>RASQAL_EXPR_ISBLANK</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_ISLITERAL</code></em> <em class="parameter"><code>RASQAL_EXPR_ORDER_COND_ASC</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_ORDER_COND_DESC</code></em> <em class="parameter"><code>RASQAL_EXPR_GROUP_COND_ASC</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_GROUP_COND_DESC</code></em> <em class="parameter"><code>RASQAL_EXPR_COUNT</code></em>
|
||
</p>
|
||
<p>
|
||
<em class="parameter"><code>RASQAL_EXPR_BANG</code></em> and <em class="parameter"><code>RASQAL_EXPR_UMINUS</code></em> are used by RDQL and
|
||
SPARQL. <em class="parameter"><code>RASQAL_EXPR_TILDE</code></em> by RDQL only. The rest by SPARQL
|
||
only.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>op</code></em> :</span></p></td>
|
||
<td> Expression operator
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>arg</code></em> :</span></p></td>
|
||
<td> Operand 1
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-2op-expression"></a><h3>rasqal_new_2op_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_2op_expression (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg1,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg2);</pre>
|
||
<p>
|
||
Constructor - create a new 2-operand expression.
|
||
Takes ownership of the operand expressions.
|
||
</p>
|
||
<p>
|
||
The operators are:
|
||
<em class="parameter"><code>RASQAL_EXPR_AND</code></em> <em class="parameter"><code>RASQAL_EXPR_OR</code></em> <em class="parameter"><code>RASQAL_EXPR_EQ</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_NEQ</code></em> <em class="parameter"><code>RASQAL_EXPR_LT</code></em> <em class="parameter"><code>RASQAL_EXPR_GT</code></em> <em class="parameter"><code>RASQAL_EXPR_LE</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_GE</code></em> <em class="parameter"><code>RASQAL_EXPR_PLUS</code></em> <em class="parameter"><code>RASQAL_EXPR_MINUS</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_STAR</code></em> <em class="parameter"><code>RASQAL_EXPR_SLASH</code></em> <em class="parameter"><code>RASQAL_EXPR_REM</code></em>
|
||
<em class="parameter"><code>RASQAL_EXPR_STR_EQ</code></em> <em class="parameter"><code>RASQAL_EXPR_STR_NEQ</code></em>
|
||
</p>
|
||
<p>
|
||
<em class="parameter"><code>RASQAL_EXPR_REM</code></em> <em class="parameter"><code>RASQAL_EXPR_STR_EQ</code></em> and <em class="parameter"><code>RASQAL_EXPR_STR_NEQ</code></em> are
|
||
not used by SPARQL. <em class="parameter"><code>RASQAL_EXPR_REM</code></em> is used by RDQL.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>op</code></em> :</span></p></td>
|
||
<td> Expression operator
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>arg1</code></em> :</span></p></td>
|
||
<td> Operand 1
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>arg2</code></em> :</span></p></td>
|
||
<td> Operand 2
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-3op-expression"></a><h3>rasqal_new_3op_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_3op_expression (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg1,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg2,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg3);</pre>
|
||
<p>
|
||
Constructor - create a new 3-operand expression.
|
||
Takes ownership of the operands.
|
||
</p>
|
||
<p>
|
||
The only operator is:
|
||
<em class="parameter"><code>RASQAL_EXPR_REGEX</code></em></p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>op</code></em> :</span></p></td>
|
||
<td> Expression operator
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>arg1</code></em> :</span></p></td>
|
||
<td> Operand 1
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>arg2</code></em> :</span></p></td>
|
||
<td> Operand 2
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>arg3</code></em> :</span></p></td>
|
||
<td> Operand 3 (may be NULL)
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-cast-expression"></a><h3>rasqal_new_cast_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_cast_expression (<a
|
||
href="/usr/share/gtk-doc/html/raptor/raptor-section-uri.html#raptor-uri"
|
||
>raptor_uri</a> *name,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *value);</pre>
|
||
<p>
|
||
Constructor - create a new expression for casting and expression to a datatype.
|
||
Takes ownership of the datatype uri and expression value.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
|
||
<td> cast datatype URI
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
|
||
<td> expression value to cast to <em class="parameter"><code>datatype</code></em> type
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-function-expression"></a><h3>rasqal_new_function_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_function_expression (<a
|
||
href="/usr/share/gtk-doc/html/raptor/raptor-section-uri.html#raptor-uri"
|
||
>raptor_uri</a> *name,
|
||
<a
|
||
href="/usr/share/gtk-doc/html/raptor/raptor-section-sequence.html#raptor-sequence"
|
||
>raptor_sequence</a> *args);</pre>
|
||
<p>
|
||
Constructor - create a new expression for a function with expression arguments.
|
||
Takes ownership of the function uri and arguments.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
|
||
<td> function name
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>args</code></em> :</span></p></td>
|
||
<td> sequence of <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> function arguments
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-literal-expression"></a><h3>rasqal_new_literal_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_literal_expression (<a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal">rasqal_literal</a> *literal);</pre>
|
||
<p>
|
||
Constructor - create a new expression for a <a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal"><span class="type">rasqal_literal</span></a>
|
||
Takes ownership of the operand literal.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>literal</code></em> :</span></p></td>
|
||
<td> Literal operand 1
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-string-op-expression"></a><h3>rasqal_new_string_op_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_string_op_expression (<a class="link" href="rasqal-section-expression.html#rasqal-op" title="enum rasqal_op">rasqal_op</a> op,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *arg1,
|
||
<a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal">rasqal_literal</a> *literal);</pre>
|
||
<p>
|
||
Constructor - create a new expression with one expression and one string operand.
|
||
Takes ownership of the operands.
|
||
</p>
|
||
<p>
|
||
The operators are:
|
||
<em class="parameter"><code>RASQAL_EXPR_STR_MATCH</code></em> (RDQL, SPARQL) and
|
||
<em class="parameter"><code>RASQAL_EXPR_STR_NMATCH</code></em> (RDQL)</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>op</code></em> :</span></p></td>
|
||
<td> Expression operator
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>arg1</code></em> :</span></p></td>
|
||
<td> Operand 1
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>literal</code></em> :</span></p></td>
|
||
<td> Literal operand 2
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-new-expression-from-expression"></a><h3>rasqal_new_expression_from_expression ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a>* rasqal_new_expression_from_expression
|
||
(<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e);</pre>
|
||
<p>
|
||
Copy Constructor - create a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object from an existing rasqal_expression object.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>e</code></em> :</span></p></td>
|
||
<td> <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object to copy
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a new <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object or NULL on failure
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-free-expression"></a><h3>rasqal_free_expression ()</h3>
|
||
<pre class="programlisting">void rasqal_free_expression (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e);</pre>
|
||
<p>
|
||
Destructor - destroy a <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody><tr>
|
||
<td><p><span class="term"><em class="parameter"><code>e</code></em> :</span></p></td>
|
||
<td> <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object
|
||
</td>
|
||
</tr></tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-expression-evaluate"></a><h3>rasqal_expression_evaluate ()</h3>
|
||
<pre class="programlisting"><a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal">rasqal_literal</a>* rasqal_expression_evaluate (<a class="link" href="rasqal-section-query.html#rasqal-query" title="rasqal_query">rasqal_query</a> *query,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
|
||
int flags);</pre>
|
||
<p>
|
||
Evaluate a <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> tree to give a <a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal"><span class="type">rasqal_literal</span></a> result
|
||
or error.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>query</code></em> :</span></p></td>
|
||
<td> <a class="link" href="rasqal-section-query.html#rasqal-query" title="rasqal_query"><span class="type">rasqal_query</span></a> this expression belongs to
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>e</code></em> :</span></p></td>
|
||
<td> The expression to evaluate.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>
|
||
<td> Flags for <a class="link" href="rasqal-section-literal.html#rasqal-literal-compare" title="rasqal_literal_compare ()"><code class="function">rasqal_literal_compare()</code></a> and RASQAL_COMPARE_NOCASE for string matches.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> a <a class="link" href="rasqal-section-literal.html#rasqal-literal" title="rasqal_literal"><span class="type">rasqal_literal</span></a> value or NULL on failure.
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-expression-print"></a><h3>rasqal_expression_print ()</h3>
|
||
<pre class="programlisting">void rasqal_expression_print (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
|
||
FILE *fh);</pre>
|
||
<p>
|
||
Print a Rasqal expression in a debug format.
|
||
</p>
|
||
<p>
|
||
The print debug format may change in any release.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>e</code></em> :</span></p></td>
|
||
<td> <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object.
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>fh</code></em> :</span></p></td>
|
||
<td> The <span class="type">FILE</span>* handle to print to.
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-expression-print-op"></a><h3>rasqal_expression_print_op ()</h3>
|
||
<pre class="programlisting">void rasqal_expression_print_op (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
|
||
FILE *fh);</pre>
|
||
<p>
|
||
Print a rasqal expression operator in a debug format.
|
||
</p>
|
||
<p>
|
||
The print debug format may change in any release.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>e</code></em> :</span></p></td>
|
||
<td> the <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> object
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>fh</code></em> :</span></p></td>
|
||
<td> the <span class="type">FILE</span>* handle to print to
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-expression-visit-fn"></a><h3>rasqal_expression_visit_fn ()</h3>
|
||
<pre class="programlisting">int (*rasqal_expression_visit_fn) (void *user_data,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e);</pre>
|
||
<p>
|
||
User function to visit an expression and operate on it with
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression-visit" title="rasqal_expression_visit ()"><code class="function">rasqal_expression_visit()</code></a></p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
|
||
<td> user data passed in with <a class="link" href="rasqal-section-expression.html#rasqal-expression-visit" title="rasqal_expression_visit ()"><code class="function">rasqal_expression_visit()</code></a>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>e</code></em> :</span></p></td>
|
||
<td> current expression
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> 0 to truncate the visit
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
<hr>
|
||
<div class="refsect2" lang="en">
|
||
<a name="rasqal-expression-visit"></a><h3>rasqal_expression_visit ()</h3>
|
||
<pre class="programlisting">int rasqal_expression_visit (<a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression">rasqal_expression</a> *e,
|
||
<a class="link" href="rasqal-section-expression.html#rasqal-expression-visit-fn" title="rasqal_expression_visit_fn ()">rasqal_expression_visit_fn</a> fn,
|
||
void *user_data);</pre>
|
||
<p>
|
||
Visit a user function over a <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a>
|
||
</p>
|
||
<p>
|
||
If the user function <em class="parameter"><code>fn</code></em> returns 0, the visit is truncated.</p>
|
||
<p>
|
||
|
||
</p>
|
||
<div class="variablelist"><table border="0">
|
||
<col align="left" valign="top">
|
||
<tbody>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>e</code></em> :</span></p></td>
|
||
<td> <a class="link" href="rasqal-section-expression.html#rasqal-expression" title="rasqal_expression"><span class="type">rasqal_expression</span></a> to visit
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>fn</code></em> :</span></p></td>
|
||
<td> visit function
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
|
||
<td> user data to pass to visit function
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||
<td> 0 if the visit was truncated.
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table></div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="footer">
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