97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
/*
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* Copyright (c) 2003-2013, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <system.hh>
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#include "scope.h"
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namespace ledger {
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scope_t * scope_t::default_scope = NULL;
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empty_scope_t * scope_t::empty_scope = NULL;
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void symbol_scope_t::define(const symbol_t::kind_t kind,
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const string& name, expr_t::ptr_op_t def)
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{
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DEBUG("scope.symbols",
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"Defining '" << name << "' = " << def << " in " << this);
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if (! symbols)
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symbols = symbol_map();
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std::pair<symbol_map::iterator, bool> result
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= symbols->insert(symbol_map::value_type(symbol_t(kind, name, def), def));
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if (! result.second) {
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symbol_map::iterator i = symbols->find(symbol_t(kind, name));
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assert(i != symbols->end());
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symbols->erase(i);
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result = symbols->insert(symbol_map::value_type
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(symbol_t(kind, name, def), def));
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if (! result.second)
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throw_(compile_error,
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_f("Redefinition of '%1%' in the same scope") % name);
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}
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}
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expr_t::ptr_op_t symbol_scope_t::lookup(const symbol_t::kind_t kind,
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const string& name)
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{
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if (symbols) {
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DEBUG("scope.symbols", "Looking for '" << name << "' in " << this);
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symbol_map::const_iterator i = symbols->find(symbol_t(kind, name));
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if (i != symbols->end()) {
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DEBUG("scope.symbols", "Found '" << name << "' in " << this);
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return (*i).second;
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}
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}
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return child_scope_t::lookup(kind, name);
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}
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value_t& call_scope_t::resolve(const std::size_t index,
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value_t::type_t context,
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const bool required)
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{
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if (index >= args.size())
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throw_(calc_error, _("Too few arguments to function"));
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value_t& value(args[index]);
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if (value.is_any()) {
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context_scope_t scope(*this, context, required);
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value = as_expr(value)->calc(scope, locus, depth);
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if (required && ! value.is_type(context))
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throw_(calc_error, _f("Expected %1% for argument %2%, but received %3%")
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% value.label(context) % index % value.label());
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}
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return value;
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}
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} // namespace ledger
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