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authorBoris Kolpackov <boris@codesynthesis.com>2016-01-05 11:55:15 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2016-01-05 11:55:15 +0200
commit9fb791e9fad6c63fc1dac49f4d05ae63b8a3db9b (patch)
treed60322d4382ca5f97b676c5abe2e39524f35eab4 /build/lexer
parentf159b1dac68c8714f7ba71ca168e3b695891aad9 (diff)
Rename build directory/namespace to build2
Diffstat (limited to 'build/lexer')
-rw-r--r--build/lexer138
1 files changed, 0 insertions, 138 deletions
diff --git a/build/lexer b/build/lexer
deleted file mode 100644
index 4a50e2a..0000000
--- a/build/lexer
+++ /dev/null
@@ -1,138 +0,0 @@
-// file : build/lexer -*- C++ -*-
-// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
-// license : MIT; see accompanying LICENSE file
-
-#ifndef BUILD_LEXER
-#define BUILD_LEXER
-
-#include <stack>
-#include <string>
-#include <iosfwd>
-#include <cstddef> // size_t
-#include <cstdint> // uint64_t
-#include <cassert>
-#include <exception>
-
-#include <butl/char-scanner>
-
-#include <build/types>
-#include <build/utility>
-
-#include <build/token>
-#include <build/diagnostics>
-
-namespace build
-{
- // Context-dependent lexing mode. In the value mode we don't treat
- // certain characters (e.g., +, =) as special so that we can use
- // them in the variable values, e.g., 'foo = g++'. In contrast, in
- // the variable mode, we restrict certain character (e.g., /) from
- // appearing in the name. The pairs mode is just like value except
- // that we split names separated by the pair character. The eval
- // mode is used in the evaluation context.
- //
- // The alternnative modes must be set manually. The value and pairs
- // modes are automatically reset after the end of the line. The
- // variable mode is reset after the name token. And the eval mode
- // is reset after the closing ')'.
- //
- // Quoted is an internal mode and should not be set explicitly.
- //
- enum class lexer_mode {normal, variable, value, pairs, eval, quoted};
-
- class lexer: protected butl::char_scanner
- {
- public:
- lexer (std::istream& is,
- const std::string& name,
- void (*processor) (token&, const lexer&) = nullptr)
- : char_scanner (is), fail (name), processor_ (processor), sep_ (false)
- {
- mode_.push (lexer_mode::normal);
- }
-
- const std::string&
- name () const {return fail.name_;}
-
- // Note: sets mode for the next token. If mode is pairs, then
- // the second argument specifies the separator character.
- //
- void
- mode (lexer_mode m, char pair_separator = '=')
- {
- mode_.push (m);
- pair_separator_ = pair_separator;
- }
-
- // Expire the current mode early.
- //
- void
- expire_mode () {mode_.pop ();}
-
- lexer_mode
- mode () const {return mode_.top ();}
-
- char
- pair_separator () const {return pair_separator_;}
-
- // Scanner.
- //
- token
- next ();
-
- // Peek at the first character of the next token. Return the character
- // or 0 if the next token will be eos. Also return an indicator of
- // whether the next token will be separated.
- //
- pair<char, bool>
- peek_char ();
-
- private:
- token
- next_impl ();
-
- token
- next_eval ();
-
- token
- next_quoted ();
-
- token
- name (bool separated);
-
- // Return true if we have seen any spaces. Skipped empty lines
- // don't count. In other words, we are only interested in spaces
- // that are on the same line as the following non-space character.
- //
- bool
- skip_spaces ();
-
- xchar
- escape ();
-
- // Diagnostics.
- //
- private:
- struct fail_mark_base: build::fail_mark_base<failed>
- {
- fail_mark_base (const std::string& n): name_ (n) {}
-
- location_prologue
- operator() (const xchar&) const;
-
- std::string name_;
- };
- typedef diag_mark<fail_mark_base> fail_mark;
-
- private:
- fail_mark fail;
-
- void (*processor_) (token&, const lexer&);
-
- std::stack<lexer_mode> mode_;
- char pair_separator_;
- bool sep_; // True if we skipped spaces in peek().
- };
-}
-
-#endif // BUILD_LEXER