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81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
#ifndef PGF_LINEARIZER_H_
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#define PGF_LINEARIZER_H_
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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 {
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} PgfLinNonExist;
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extern GU_DECLARE_TYPE(PgfLinNonExist, abstract);
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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_token)(PgfLinFuncs** self, PgfToken tok);
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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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/// handling nonExist
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void (*symbol_ne)(PgfLinFuncs** self);
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/// token binding
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void (*symbol_bind)(PgfLinFuncs** self);
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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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#endif
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#ifdef PGF_PARSER_H_
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// Used internally in the parser
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GuString
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pgf_get_tokens(PgfSequence* seq, uint16_t seq_idx, GuPool* pool);
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#endif
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