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// file : cutl/compiler/cxx-indenter.hxx
// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#ifndef CUTL_COMPILER_CXX_INDENTER_HXX
#define CUTL_COMPILER_CXX_INDENTER_HXX
#include <set>
#include <stack>
#include <deque>
#include <string>
#include <cstddef> // std::size_t
#include <cutl/compiler/code-stream.hxx>
namespace cutl
{
namespace compiler
{
template <typename C>
class cxx_indenter: public code_stream<C>
{
public:
cxx_indenter (code_stream<C>& out);
private:
cxx_indenter (cxx_indenter const&);
cxx_indenter&
operator= (cxx_indenter const&);
public:
virtual void
put (C);
virtual void
unbuffer ();
private:
typedef std::basic_string<C> string;
enum construct
{
con_other,
con_pp_dir,
con_c_com,
con_cxx_com,
con_string_lit,
con_char_lit
};
private:
void
next_token (string const& old, C);
void
ensure_new_line ();
void
output_indentation ();
void
write (C);
private:
void
tokenize (C, construct old);
void
retire (C);
private:
enum char_class_type
{
cc_alpha, // Alpha + '_'.
cc_digit,
cc_op_punc, // Operator or punctuation.
cc_space
};
static char_class_type
char_class (C);
private:
enum keyword_type
{
kw_if,
kw_do,
kw_for,
kw_else,
kw_case,
kw_while,
kw_catch,
kw_default
};
static C const*
keyword (keyword_type);
private:
code_stream<C>& out_;
bool buffering_; // True if write() should buffer the char.
std::size_t position_; // Current position on the line.
std::size_t paren_balance_; // ( ) balance.
std::stack<std::size_t> indentation_;
std::size_t spaces_;
bool suppress_nl_;
construct construct_;
// Special state stack for the do-while construct. The presence
// of an element in the stack indicates that we are in a braced
// do-while construct. The value of the element is the brace
// balance.
std::stack<std::size_t> do_while_state_;
typedef std::deque<C> hold;
hold hold_;
private:
string token_; // previously fully recognized token
string lexeme_; // current lexeme (accumulator)
// Keywords that may be folowed by a single-line block, e.g., if,
// else, etc.
//
std::set<string> single_line_blocks_;
// Keywords that may follow (and be related) to a previous block,
// e.g., else, case, catch.
//
std::set<string> follow_blocks_;
string do_;
string lbrace_;
string rbrace_;
private:
// Single-line indented blocks such as if, else, while, etc. The
// newline flag indicates whether a new line has been seen after
// the keyword. This is needed to properly distinguish cases such
// as:
//
// else if (...)
// foo ();
//
// else
// if (...)
// foo ();
//
struct indent_block
{
indent_block (bool newline, std::size_t indentation)
: newline_ (newline), indentation_ (indentation)
{
}
bool newline_;
std::size_t indentation_; // Size of the indentation_ stack
// corresponding to this block, or
// 0 if it is not indented.
};
std::stack<indent_block> indent_stack_;
};
}
}
#include <cutl/compiler/cxx-indenter.ixx>
#include <cutl/compiler/cxx-indenter.txx>
#endif // CUTL_COMPILER_CXX_INDENTER_HXX
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