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// file : libbuild2/build/script/lexer.hxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef LIBBUILD2_BUILD_SCRIPT_LEXER_HXX
#define LIBBUILD2_BUILD_SCRIPT_LEXER_HXX
#include <libbuild2/types.hxx>
#include <libbuild2/utility.hxx>
#include <libbuild2/script/lexer.hxx>
#include <libbuild2/build/script/token.hxx>
namespace build2
{
namespace build
{
namespace script
{
struct lexer_mode: build2::script::lexer_mode
{
using base_type = build2::script::lexer_mode;
enum
{
command_line = base_type::value_next,
first_token, // Expires at the end of the token.
second_token, // Expires at the end of the token.
variable_line, // Expires at the end of the line.
for_loop // Used for sensing the for-loop leading tokens.
};
lexer_mode () = default;
lexer_mode (value_type v): base_type (v) {}
lexer_mode (build2::lexer_mode v): base_type (v) {}
};
class lexer: public build2::script::lexer
{
public:
using base_lexer = build2::script::lexer;
// Note that neither the name nor escape arguments are copied.
//
lexer (istream& is,
const path_name& name,
uint64_t line, // Start line in the stream.
lexer_mode m,
const char* escapes = nullptr)
: base_lexer (is, name, line,
nullptr /* escapes */,
false /* set_mode */,
redirect_aliases)
{
mode (m, '\0', escapes);
}
virtual void
mode (build2::lexer_mode,
char = '\0',
optional<const char*> = nullopt,
uintptr_t = 0) override;
virtual token
next () override;
public:
static redirect_aliases_type redirect_aliases;
private:
using build2::script::lexer::mode; // Getter.
token
next_line ();
};
}
}
}
#endif // LIBBUILD2_BUILD_SCRIPT_LEXER_HXX
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