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// file : libbuild2/test/script/parser.hxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef LIBBUILD2_TEST_SCRIPT_PARSER_HXX
#define LIBBUILD2_TEST_SCRIPT_PARSER_HXX
#include <unordered_map>
#include <libbuild2/types.hxx>
#include <libbuild2/forward.hxx>
#include <libbuild2/utility.hxx>
#include <libbuild2/diagnostics.hxx>
#include <libbuild2/script/parser.hxx>
#include <libbuild2/test/script/token.hxx>
#include <libbuild2/test/script/script.hxx>
namespace build2
{
namespace test
{
namespace script
{
class runner;
class parser: public build2::script::parser
{
// Pre-parse. Issue diagnostics and throw failed in case of an error.
//
public:
parser (context& c): build2::script::parser (c) {}
void
pre_parse (script&);
void
pre_parse (istream&, script&);
// Recursive descent parser.
//
// Usually (but not always) parse functions receive the token/type
// from which it should start consuming and in return the token/type
// should contain the first token that has not been consumed.
//
// Functions that are called parse_*() rather than pre_parse_*() are
// used for both stages.
//
protected:
bool
pre_parse_demote_group_scope (unique_ptr<scope>&);
token
pre_parse_scope_body ();
unique_ptr<group>
pre_parse_scope_block (token&, token_type&, const string&);
bool
pre_parse_line (token&, token_type&,
optional<description>&,
lines* = nullptr,
bool one = false,
optional<line_type> flow_control_type = nullopt);
bool
pre_parse_block_line (token&, token_type&,
line_type block_type,
optional<description>&,
lines&);
bool
pre_parse_if_else (token&, token_type&,
optional<description>&,
lines&);
bool
pre_parse_if_else_scope (token&, token_type&,
optional<description>&,
lines&);
bool
pre_parse_if_else_command (token&, token_type&,
optional<description>&,
lines&);
bool
pre_parse_while (token&, token_type&,
optional<description>&,
lines&);
void
pre_parse_directive (token&, token_type&);
void
pre_parse_include_line (names, location);
description
pre_parse_leading_description (token&, token_type&);
description
parse_trailing_description (token&, token_type&);
command_expr
parse_command_line (token&, token_type&);
// Execute. Issue diagnostics and throw failed in case of an error.
//
public:
void
execute (script&, runner&);
void
execute (scope&, script&, runner&);
protected:
void
exec_scope_body ();
// Helpers.
//
public:
static bool
special_variable (const string&) noexcept;
// Customization hooks.
//
protected:
virtual lookup
lookup_variable (names&&, string&&, const location&) override;
// Insert id into the id map checking for duplicates.
//
protected:
const string&
insert_id (string, location);
protected:
script* script_;
// Pre-parse state.
//
using id_map = std::unordered_map<string, location>;
using include_set = set<path>;
group* group_;
id_map* id_map_;
include_set* include_set_; // Testscripts already included in this
// scope. Must be absolute and normalized.
string id_prefix_; // Auto-derived id prefix.
// Execute state.
//
runner* runner_;
scope* scope_;
};
}
}
}
#endif // LIBBUILD2_TEST_SCRIPT_PARSER_HXX
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