syntax in BCPL

The "Missing:"s below indicate that an entry is incomplete.

either the entry exist in the language, and please tell.
either the entry doesn't exist in the language, and please tell so. The entry will be marked as such and won't appear as missing anymore.

(* ... *) (10) block (grouping statements, especially when statements are not expressions)

// commenting (until end of line)

= ~= neqv (10) equality / inequality (shallow)

( ... ) grouping expressions

valof use a block as a return value (when statements are not expressions)

:= variable assignment or declaration (assignment)

: variable assignment or declaration (assignment)

let v = e variable assignment or declaration (declaration)

Functions

f(a,b,...f) or f[a,b,...] depending on the version function call

f(para1, para2, ...) = valof $( ... $) function definition

let f(para1, para2, ...) be $( ... $) function definition (procedures)

resultis / return (30) function return value (breaks the control flow)

Control Flow

/ break breaking control flow (continue / break)

goto breaking control flow (goto (unconditional jump))

resultis / return (30) breaking control flow (returning a value)

if c do b if_then

test c then b1 or b2 if_then_else

c -> b1, b2 if_then_else

expr repeatuntil cond loop (do something until condition)

while cond do expr loop (while condition do something)

switchon val case v1: expr1 case v2: expr2 default: expr_else multiple selection (switch)

Strings

"*n" strings (end-of-line (without writing the real CR or LF character))
Booleans

false false value

~ logical not

\/ / /\ (10) logical or / and (non short circuit (always evaluates both arguments))

| / & logical or / and (short circuit)

true true value
Bags and Lists

a*[i] or a!i or a*(i) depending on the version list/array indexing
Various Data Types

lv reference (pointer) (creation)

rv reference (pointer) (dereference)
Mathematics

rem modulo (modulo of -3 / 2 is -1)

- negation

Remarks

(1) for C, it is not a standard convention, but it is the more widespread
(2) any string literal would work
(3) see also =head1, =head2, =over, etc
(4) need "file: %script-header.r" in file header
(5) displayed <- with a special character
(6) variable on the right
(7) the variable behaves like a pointer
(8) cf horizontal layout
(9) introduce scope
(10) ascii representation, original uses a special charset
(11) <> and # are synonyms
(12) === and !== differ from == and != when the objects' type differ
(13) for objects
(14) normal / structural / unification / arithmetic
(15) deep comparison
(16) in List::Util
(17) Univ operator
(18) procedure call
(19) the function is "f: g:"
(20) special sugar for only one parameter
(21) there really is a parameter which is the empty tuple
(22) f is a block
(23) when callee has special "&" prototype
(24) this is a block, not precisely a function, but it's alike
(25) also works for procedures: proc {$ A B} ... end
(26) x, y, z are the parameters
(27) method is optional
(28) in Lua, "return xxx" can only appear before a block end
(29) only in inline('...')
(30) "return" is used when there is no value to return
(31) only for anonymous function
(32) the result goes to "e"
(33) "break"s are mandatory, even for "default"!
(34) Perl >= 5.8.0
(35) cond
(36) see also catch/throw
(37) often provided in the abbreviated form call/cc
(38) expression "e" is cast to the type of "v"
(39) quite bad: only the reference is non-mutable whereas the object is still mutable
(40) eventual send
(41) properties are something alike attributes, but really are methods
(42) one level depth
(43) general deep copy function
(44) object cloning is the default, uses the copy constructor in C++
(45) assignment attempt
(46) does not work on builtin types
(47) see also callable(obj.meth) for unbound methods
(48) usually called self
(49) ":" is for external symbols only, recommended
(50) directory name is package name
(51) if names are exported using @EXPORT
(52) if names are not exported or are exported using @EXPORT_OK
(53) deprecated in ANSI Common Lisp, but used in ASDF
(54) using a correspondance from the package name to the file name
(55) when using format
(56) but not using the C-like %-syntax
(57) adding an end-of-line
(58) adding an end-of-line unless already newline-terminated
(59) faster than isEqual
(60) Lua 5.0
(61) is range-checked whereas a[i] is not
(62) ESI dialect
(63) beware of 0.0 which is true in Pike!
(64) &, and synonyms
(65) simple functions, not operators
(66) flattened
(67) restricted to initialisation of a local variable in C and C++
(68) a b c must be constants
(69) beware, if you give only one integer argument, it is the size!
(70) for write access: a i o put
(71) for write access: a :at i :put o
(72) list comprehension
(73) not in standard
(74) in place
(75) not standard, but nearly standard
(76) the result is not guaranteed to be the same as the order in the input
(77) Borland Pascal extension
(78) prefix
(79) postfix
(80) infix
(81) only for "access" types
(82) attribute selector
(83) returns an iterator
(84) integers are decimals
(85) with mathematical priorities
(86) APL uses a real multiplication sign for multiplication from a special character set
(87) for each various types
(88) Ruby >= 1.7
(89) log x 10
(90) see also bit-and / bit-or / bit-xor
(91) see also bit-not
(92) "stop" is now deprecated

Pixel

This document is licensed under GFDL (GNU Free Documentation License).
$Id: syntax-across-languages.html.pl 327 2006-09-25 15:47:54Z pixel $

`(* ... *) (10)`	block (grouping statements, especially when statements are not expressions)
`//`	commenting (until end of line)
`= ~= neqv (10)`	equality / inequality (shallow)
`( ... )`	grouping expressions
`valof`	use a block as a return value (when statements are not expressions)
`:=`	variable assignment or declaration (assignment)
`:`	variable assignment or declaration (assignment)
`let v = e`	variable assignment or declaration (declaration)

`f(a,b,...f) or f[a,b,...] depending on the version`	function call
`f(para1, para2, ...) = valof $( ... $)`	function definition
`let f(para1, para2, ...) be $( ... $)`	function definition (procedures)
`resultis / return (30)`	function return value (breaks the control flow)

`/ break`	breaking control flow (continue / break)
`goto`	breaking control flow (goto (unconditional jump))
`resultis / return (30)`	breaking control flow (returning a value)
`if c do b`	if_then
`test c then b1 or b2`	if_then_else
`c -> b1, b2`	if_then_else
`expr repeatuntil cond`	loop (do something until condition)
`while cond do expr`	loop (while condition do something)
`switchon val case v1: expr1 case v2: expr2 default: expr_else`	multiple selection (switch)

`false`	false value
`~`	logical not
`\/ / /\ (10)`	logical or / and (non short circuit (always evaluates both arguments))
`\| / &`	logical or / and (short circuit)
`true`	true value

`lv`	reference (pointer) (creation)
`rv`	reference (pointer) (dereference)

`rem`	modulo (modulo of -3 / 2 is -1)
`-`	negation