forked from GitHub/gf-core
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
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* Copyright 2010-2011 University of Helsinki.
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*
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* This file is part of libpgf.
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*
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* Libpgf is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* Libpgf is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with libpgf. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <gu/type.h>
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#include <gu/enum.h>
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/// Linearization of abstract syntax trees.
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/// @file
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/** @}
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*
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* @name Enumerating concrete syntax trees
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*
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* Because of the \c variants construct in GF, there may be several
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* possible concrete syntax trees that correspond to a given abstract
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* syntax tree. These can be enumerated with #pgf_lzr_concretize and
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* #pgf_cnc_trees_next.
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*
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* @{
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*/
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/// A concrete syntax tree
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typedef GuVariant PgfCncTree;
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/// An enumeration of #PgfCncTree trees.
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typedef GuEnum PgfCncTreeEnum;
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/// Begin enumerating concrete syntax variants.
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PgfCncTreeEnum*
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pgf_lzr_concretize(PgfConcr* concr, PgfExpr expr, GuPool* pool);
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typedef struct PgfLinFuncs PgfLinFuncs;
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struct PgfLinFuncs
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{
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/// Output tokens
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void (*symbol_tokens)(PgfLinFuncs** self, PgfTokens* toks);
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/// Output literal
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void (*expr_literal)(PgfLinFuncs** self, PgfLiteral lit);
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/// Begin phrase
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void (*begin_phrase)(PgfLinFuncs** self, PgfCId cat, int fid, int lindex, PgfCId fun);
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/// End phrase
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void (*end_phrase)(PgfLinFuncs** self, PgfCId cat, int fid, int lindex, PgfCId fun);
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};
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/// Linearize a concrete syntax tree.
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void
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pgf_lzr_linearize(PgfConcr* concr, PgfCncTree ctree, size_t lin_idx,
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PgfLinFuncs** fnsp);
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/// Linearize a concrete syntax tree as space-separated tokens.
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void
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pgf_lzr_linearize_simple(PgfConcr* concr, PgfCncTree ctree,
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size_t lin_idx, GuOut* out, GuExn* err);
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