info flex

Concept Index: G – R

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	Index Entry	Section

G
	getting current start state with YY_START	10 Start Conditions

H
	halting with yyterminate()	8 Actions
	handling include files with multiple input buffers	11 Multiple Input Buffers
	handling include files with multiple input buffers	11 Multiple Input Buffers
	header files, with C++	18 Generating C++ Scanners

I
	include files, with C++	18 Generating C++ Scanners
	input file, Definitions section	5.1 Format of the Definitions Section
	input file, Rules Section	5.2 Format of the Rules Section
	input file, user code Section	5.3 Format of the User Code Section
	input()	8 Actions
	input(), and C++	8 Actions
	input, format of	5 Format of the Input File
	input, matching	7 How the Input Is Matched

K
	keywords, for performance	17 Performance Considerations

L
	lex (traditional) and POSIX	20 Incompatibilities with Lex and Posix
	LexerInput, overriding	25.1 How do I use my own I/O classes in a C++ scanner?
	LexerOutput, overriding	25.1 How do I use my own I/O classes in a C++ scanner?
	limitations of flex	24 Limitations
	literal text in patterns, syntax of	6 Patterns
	loading tables at runtime	22.2 Loading and Unloading Serialized Tables

M
	m4	A.3 M4 Dependency
	Makefile, example of implicit rules	A.1 Makefiles and Flex
	Makefile, explicit example	A.1 Makefiles and Flex
	Makefile, syntax	A.1 Makefiles and Flex
	matching C-style double-quoted strings	10 Start Conditions
	matching, and trailing context	7 How the Input Is Matched
	matching, length of	7 How the Input Is Matched
	matching, multiple matches	7 How the Input Is Matched
	member functions, C++	18 Generating C++ Scanners
	memory management	21 Memory Management
	memory, allocating input buffers	11 Multiple Input Buffers
	memory, considerations for reentrant scanners	19.4.4 Init and Destroy Functions
	memory, deleting input buffers	11 Multiple Input Buffers
	memory, for start condition stacks	10 Start Conditions
	memory, serialized tables	22 Serialized Tables
	memory, serialized tables	22.2 Loading and Unloading Serialized Tables
	methods, c++	18 Generating C++ Scanners
	minimal scanner	7 How the Input Is Matched
	multiple input streams	11 Multiple Input Buffers

N
	name definitions, not POSIX	20 Incompatibilities with Lex and Posix
	negating ranges in patterns	6 Patterns
	newline, matching in patterns	6 Patterns
	non-POSIX features of flex	20 Incompatibilities with Lex and Posix
	nowrap, %option	9 The Generated Scanner
	NULL character in patterns, syntax of	6 Patterns

O
	octal characters in patterns	6 Patterns
	options, command-line	16 Scanner Options
	overriding LexerInput	25.1 How do I use my own I/O classes in a C++ scanner?
	overriding LexerOutput	25.1 How do I use my own I/O classes in a C++ scanner?
	overriding the memory routines	21.2 Overriding The Default Memory Management

P
	Pascal-like language	4 Some Simple Examples
	pattern aliases, defining	5.1 Format of the Definitions Section
	pattern aliases, expansion of	6 Patterns
	pattern aliases, how to define	5.1 Format of the Definitions Section
	pattern aliases, use of	5.1 Format of the Definitions Section
	patterns and actions on different lines	20 Incompatibilities with Lex and Posix
	patterns, character class equivalence	6 Patterns
	patterns, common	A.4 Common Patterns
	patterns, end of line	6 Patterns
	patterns, grouping and precedence	6 Patterns
	patterns, in rules section	6 Patterns
	patterns, invalid trailing context	6 Patterns
	patterns, matching	7 How the Input Is Matched
	patterns, precedence of operators	6 Patterns
	patterns, repetitions with grouping	6 Patterns
	patterns, special characters treated as non-special	6 Patterns
	patterns, syntax	6 Patterns
	patterns, syntax	6 Patterns
	patterns, tuning for performance	17 Performance Considerations
	patterns, valid character classes	6 Patterns
	performance optimization, matching longer tokens	17 Performance Considerations
	performance optimization, recognizing keywords	17 Performance Considerations
	performance, backing up	17 Performance Considerations
	performance, considerations	17 Performance Considerations
	performance, using keywords	17 Performance Considerations
	popping an input buffer	11 Multiple Input Buffers
	POSIX and lex	20 Incompatibilities with Lex and Posix
	POSIX comp;compliance	20 Incompatibilities with Lex and Posix
	POSIX, character classes in patterns, syntax of	6 Patterns
	preprocessor macros, for use in actions	8 Actions
	pushing an input buffer	11 Multiple Input Buffers
	pushing back characters with unput	8 Actions
	pushing back characters with unput()	8 Actions
	pushing back characters with yyless	8 Actions
	pushing back EOF	8 Actions

R
	ranges in patterns	6 Patterns
	ranges in patterns, negating	6 Patterns
	recognizing C comments	10 Start Conditions
	reentrant scanners, multiple interleaved scanners	19.1 Uses for Reentrant Scanners
	reentrant scanners, recursive invocation	19.1 Uses for Reentrant Scanners
	reentrant, accessing flex variables	19.4.3 Global Variables Replaced By Macros
	reentrant, accessor functions	19.4.5 Accessing Variables with Reentrant Scanners
	reentrant, API explanation	19.2 An Overview of the Reentrant API
	reentrant, calling functions	19.4.2 The Extra Argument
	reentrant, example of	19.3 Reentrant Example
	reentrant, explanation	19 Reentrant C Scanners
	reentrant, extra data	19.4.6 Extra Data
	reentrant, initialization	19.4.4 Init and Destroy Functions
	regular expressions, in patterns	6 Patterns
	REJECT	8 Actions
	REJECT, calling multiple times	8 Actions
	REJECT, performance costs	17 Performance Considerations
	reporting bugs	2 Reporting Bugs
	restarting the scanner	20 Incompatibilities with Lex and Posix
	RETURN, within actions	9 The Generated Scanner
	rules, default	4 Some Simple Examples
	rules, in flex input	5.2 Format of the Rules Section

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