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Hodnocené. / 5. Na základě hodnocení zákazníků
Page 27
list l = {
"Item-1", {1, 2, 3},
"Item-2", "hello mum",
"Item-3", 3.14159, /* Trailing comma optional */
};
{button See Also, ALink(crunch,,,)}
Function definitions
A function definition has the form:
[storage_class_specifier] [type_specifier] function_name
( [arg_list] )
{
function_body
}
The storage_class_specifier is currently ignored, although a future version of the language will be able to
understand the static class specifier. The type_specifier is used to indicate the return type of the function.
This is currently ignored.
The argument list should be specified in the ANSI-C format, specifying the type specifiers and optional
names. In addition, crunch supports the syntax:
~ type_specifier [name]
which acts as a place holder for an optional argument or an argument which is to be handled with different
semantics from the standard C-style.
Crunch also supports the ellipsis (...) to indicate that optional further arguments may be specified.
Please note that crunch does not currently check function calls against prototypes.
{button See Also, ALink(crunch,,,)}
Loading a macro: main, _init
As explained below, global variables may be initialised with non-constant expressions, unlike C which is
limited to a constant expression. Because of this facility, CRiSP provides a mechanism for ensuring that
these global variables are initialised before the macros execute. All global variable definitions and initializors
are compiled into a function called _init. When a compiled macro file is loaded (the .cm file), this macro is
executed first. Programmers can put their own one-time initialisation code in the function main(). All the
code in main() is executed within the context of the function _init after the global initialisations. To
understand this better, it is best to compile your code with the -c switch and look at the lisp code that the
compiler generates.
{button See Also, ALink(crunch,,,)}
Expressions
The following table summarises the operator precedence and associativity of the primitive elements of an
expression. This table is a copy of the table which can be found by executing the hier macro at the
command line prompt:
Arity Operator Assoc
--------------------------------------------------------------
binary () [] -> . l -> r
unary ! ~ ++ -- - (type) * & sizeof r -> l
binary * / % l -> r
binary + - l -> r
binary << >> l -> r
binary < <= > >= l -> r
binary == != l -> r
binary & l -> r
binary ^ l -> r
- CRiSP File Editor 1
- Programmers Guide 1
- Introduction 7
- Disclaimer 7
- Writing your own macros 9
- Tools Overview 10
- <Alt-F10> 10
- File formats 11
- Specifying Directories 11
- Language Mapping switches 11
- General switches 11
- Output file format 12
- Filename filtering 12
- Language specifications" 13
- Languages 13
- The CRUNCH Language 14
- The crunch compiler 14
- Data types 15
- Scoping 17
- Argument Passing 18
- Variable argument lists 20
- The int data type 21
- The float/double data type 21
- The string datatype 21
- The list (array) datatype 22
- List assignment 23
- Making Lists 23
- Manipulating List Items 24
- Sorting Lists 24
- Searching Lists 24
- Informational Lists 24
- The declare datatype 25
- Structures 25
- Language Grammar 25
- Declarations 26
- Function definitions 27
- Expressions 27
- Testing expressions: if 29
- Selection: switch 29
- Debugging macros 30
- Macro tracing 31
- Debug applied to a function 32
- Debug on startup 32
- Debug buffering 33
- The vars() macro 33
- Buffers, Files and Windows 33
- Buffer Attributes 34
- Ansi Mode buffer attribute 34
- The Backup Flag 34
- The Binary Flag 34
- Character Maps 37
- Objects supported by CRiSP 38
- Backing up Files 39
- Autosaving 39
- Core dumping 40
- Regions and markers 40
- Global and Static macros 41
- Registered Macros 42
- Timer functions 45
- Color Support 46
- Character Escaping 48
- Character Class: [..] and 49
- Matching Line boundaries 49
- Repetition: @ and + 49
- Minimal and Maximal Matching 50
- Matching Direction 51
- GUI Based Objects 51
- Terminology 52
- Overview of an Object 54
- Creating a Dialog Box 55
- Object Types 56
- Geometry Layout 59
- Sub-groups 64
- Properties (private symbols) 65
- Dialog boxes and Callbacks 66
- Platform Specific Issues 67
- Keyword Builder 68
- Character classes 69
- Global attributes 69
- Keywords 69
- Creating a new colorizer 69
- Dialog box buttons 69
- .KWD Keyword File Format 70
- The flags= Directive 71
- Character Class Directives 72
- Keyword Directives 74
- Keyword Flags 75
- Keyword Regular Expressions 76
- Limitations of Colorization 76
- Colorization:limitations 76
- Case study #1: C colorizer 77
- IPC Mechanisms 79
- IPC Primitives 80
- IPC Callbacks 80
- IPC_TRIGGER_WRITE 82
- Pipe Communications 84
- PTY Communications 84
- PTYPseudo 84
- Server:DDE 85
- DDE Communications 85
- DDEProgram Manager 85
- Excel:invoking CRiSP 86
- Signals Communications 86
- Signal based communication 87
- Keyboard objects 87
- Keys and Keystrokes 88
- Character based terminals 88
- Scan Codes 89
- The cm compiler 90
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