NAME

var.ops - Variable Ops

DESCRIPTION

These operations deal with both lexical and global variables, as well as the symbol tables that contain them.

Operations to create, modify and delete lexical variables.

store_lex(in STR, in PMC): Store object $2 as lexical symbol $1. The opcode might succeed or throw an exception on unknown lexical names depending on the implementation of the LexPad PMC. Parrot's LexPad throws an exception for unknown names.
find_lex(out PMC, in STR): Find the lexical variable named $2 and store it in $1. This opcode either throws an exception or returns a Null PMC for the failure case, depending on the implementation of the LexPad PMC. Parrot's standard LexPad throws and exception for non-existing names.

Operations to modify global variables

store_global(in STR, in PMC): Store global $2 as global symbol $1
store_global(in STR, in STR, in PMC): Store global $3 as global symbol $2 in namespace $1. If namespace $1 doesn't exist it is created.
store_global(in PMC, in STR, in PMC): Store global $3 as global symbol $2 in namespace $1.
find_global(out PMC, in STR): Find the global named $2 and store it in $1. If the global doesn't exist either throws an exception or sets $1 to the Null PMC, depending on current errors settings, s. errorson.
find_global(out PMC, in STR, in STR): Find the global named $3 in namespace $2 and store it in $1. If the global doesn't exist either throws an exception or sets $1 to the Null PMC, depending on current errors settings, s. errorson.; If $3 is NULL the namespace hash for namespace $2 is returned.
find_global(out PMC, in PMC, in STR): Find the global named $3 in the namespace specified by $2 and store it in $1. If the global doesn't exist either throws an exception or sets $1 to the Null PMC, depending on current errors settings, s. errorson.
find_name(out PMC, in STR): Find the name $2 in lexical, current, global, or builtin namespace and store it in $1. If the name doesn't exist either throws an exception or sets $1 to PMCNULL, depending on current errors settings, s. errorson.

This program is free software. It is subject to the same license as the Parrot interpreter itself.