symbol: Add package
* symbol.xml: New package. * test/core/suite.xml: Import new symbol package. * test/core/symbol.xml: New test spec.master
Mike Gerwitz
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<?xml version="1.0"?>
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<!--
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Copyright (C) 2018 R-T Specialty, LLC.
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This file is part of tame-core.
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tame-core is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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-->
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<package xmlns="http://www.lovullo.com/rater"
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xmlns:c="http://www.lovullo.com/calc"
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xmlns:t="http://www.lovullo.com/rater/apply-template"
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core="true"
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desc="Symbol Introspection">
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TAME provides powerful symbol table introspection features to assist
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with metaprogramming.
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This package provides templates to abstract some of those features and
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make them easier to use.
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If introspecting on symbols that are defined within the same package,
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be aware that the symbols may not be available until a future pass;
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\tt{expand-sequence} may be helpful in that situation.
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\ref{_if-symbol_} is a general-purpose template to conditionally expand a
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body if a symbol matches a given predicate.
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The predicates currently supported are \tt{type} and \tt{dim}.
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If no predicate is provided,
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then the body will be expanded if the symbol exists.\footnote{
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This is equivalent to \tt{type=""}.}
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<template name="_if-symbol_"
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desc="Expand body if symbol predicate matches">
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<param name="@values@" desc="Condition body" />
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<param name="@name@" desc="Symbol name" />
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<param name="@type@" desc="Symbol type predicate" />
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<param name="@dim@" desc="Symbol dimensions predicate" />
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<param name="@_sym_type@" desc="Symbol type lookup">
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<param-sym-value name="@name@" value="type" ignore-missing="true" />
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</param>
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<param name="@_sym_dim@" desc="Symbol dimensions lookup">
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<param-sym-value name="@name@" value="dim" ignore-missing="true" />
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</param>
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<if name="@type@">
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<if name="@_sym_type@" eq="@type@">
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<param-copy name="@values@" />
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</if>
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</if>
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<unless name="@type@">
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<if name="@dim@">
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<if name="@_sym_dim@" eq="@dim@">
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<param-copy name="@values@" />
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</if>
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</if>
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<!-- default simply checks to see if the symbol exists -->
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<unless name="@dim@">
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<unless name="@_sym_type@" eq="">
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<param-copy name="@values@" />
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</unless>
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</unless>
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</unless>
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</template>
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\ref{_if-defined_} is the same as \ref{_if-symbol_} with no predicates;
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it provides more comfortable terminology for a common use case.
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<template name="_if-defined_"
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desc="Expand body if symbol is defined">
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<param name="@values@" desc="Condition body" />
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<param name="@name@" desc="Symbol name" />
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<t:if-symbol name="@name@">
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<param-copy name="@values@" />
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</t:if-symbol>
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</template>
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</package>
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@ -37,6 +37,7 @@
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<import package="aggregate" />
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<import package="insurance" />
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<import package="symbol" />
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<import package="tplgen" />
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<!-- XXX broken!
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@ -0,0 +1,171 @@
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<?xml version="1.0"?>
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<!--
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Copyright (C) 2018 R-T Specialty, LLC.
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This file is part of tame-core.
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tame-core is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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-->
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<package xmlns="http://www.lovullo.com/rater"
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xmlns:c="http://www.lovullo.com/calc"
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xmlns:t="http://www.lovullo.com/rater/apply-template"
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desc="Vector Folding and Unfolding Specs">
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<import package="../spec" />
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<import package="../../vector/stub" />
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<import package="../../base" />
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<import package="../../symbol" />
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<t:describe name="_if-symbol_">
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<t:describe name="given no predicate">
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<t:it desc="expands body if symbol is defined">
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<t:given>
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<c:sum>
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<t:if-symbol name="TRUE">
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<c:value-of name="TRUE" />
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</t:if-symbol>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="TRUE" />
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</t:expect>
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</t:it>
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<t:it desc="does not expand body if symbol is undefined">
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<t:given>
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<c:sum>
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<t:if-symbol name="UNDEFINED">
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<c:value-of name="TRUE" />
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</t:if-symbol>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="FALSE" />
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</t:expect>
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</t:it>
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</t:describe>
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<t:describe name="given type predicate">
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<t:it desc="expands body if symbol is of given type">
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<t:given>
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<c:sum>
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<t:if-symbol name="TRUE" type="const">
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<c:value-of name="TRUE" />
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</t:if-symbol>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="TRUE" />
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</t:expect>
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</t:it>
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<t:it desc="does not expand body if symbol is not of given type">
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<t:given>
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<c:sum>
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<t:if-symbol name="TRUE" type="class">
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<c:value-of name="TRUE" />
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</t:if-symbol>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="FALSE" />
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</t:expect>
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</t:it>
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</t:describe>
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<t:describe name="given dim predicate">
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<t:it desc="expands body if symbol dimenions matches">
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<t:given>
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<c:sum>
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<t:if-symbol name="NVEC1" dim="1">
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<c:value-of name="TRUE" />
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</t:if-symbol>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="TRUE" />
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</t:expect>
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</t:it>
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<t:it desc="does not expand body if symbol does match dimensions">
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<t:given>
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<c:sum>
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<t:if-symbol name="NVEC1" dim="2">
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<c:value-of name="TRUE" />
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</t:if-symbol>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="FALSE" />
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</t:expect>
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</t:it>
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</t:describe>
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</t:describe>
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<!-- this duplicates the above _if-symbol_ portion -->
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<t:describe name="_if-defined_">
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<t:describe name="given no predicate">
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<t:it desc="expands body if symbol is defined">
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<t:given>
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<c:sum>
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<t:if-defined name="TRUE">
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<c:value-of name="TRUE" />
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</t:if-defined>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="TRUE" />
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</t:expect>
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</t:it>
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<t:it desc="does not expand body if symbol is undefined">
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<t:given>
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<c:sum>
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<t:if-defined name="UNDEFINED">
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<c:value-of name="TRUE" />
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</t:if-defined>
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<c:value-of name="FALSE" />
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</c:sum>
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</t:given>
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<t:expect>
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<t:match-result value="FALSE" />
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</t:expect>
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</t:it>
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</t:describe>
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</t:describe>
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</package>
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