gp2c types

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gp2c types

Internally gp2c assign types to objects. The most common types are given below:

name description

void like in C

bool boolean, true (1) or false (0)

negbool antiboolean, true (0) or false (1)

small C integer long

int multiprecision integer

real multiprecision floating point

mp multiprecision number

var variable

pol polynomial

vecsmall vector of C long (t_VECSMALL)

vec vector and matrices (excluding vecsmall)

list GP lists

str characters string as a char *

genstr characters string as a GEN (t_STR)

gen generic PARI object (GEN)

lg length of object (returned by length)

typ type of object (returned by type)

name	description
void	like in C
bool	boolean, true (1) or false (0)
negbool	antiboolean, true (0) or false (1)
small	C integer long
int	multiprecision integer
real	multiprecision floating point
mp	multiprecision number
var	variable
pol	polynomial
vecsmall	vector of C long (t_VECSMALL)
vec	vector and matrices (excluding vecsmall)
list	GP lists
str	characters string as a char *
genstr	characters string as a GEN (t_STR)
gen	generic PARI object (GEN)
lg	length of object (returned by length)
typ	type of object (returned by type)

**Table 1:** Types preorder
$\begin{table}\begin{displaymath} \unitlength=1.mm \begin{picture}(12,50)(-6,0) \... ...ine(1,4){7}} \put(0,04){\line(0,1){5}} \end{picture}\end{displaymath}\end{table}$

Types are preordered as in Table 1. The complete preorder known by gp2c can be accessed by running 'gp2c -t'.

Variable are typed. A variable can only take values having a type equal or lower than its type. By default, variables are of type gen.

Next: Type declaration Up: Advanced use of gp2c Previous: Advanced use of gp2c

Bill Allombert 2006-01-28