Prolog Flags

Prolog flags can be accessed via the system predicates current_prolog_flag/2 and set_prolog_flag/2. The following Prolog flags are supported by the Runtime frequent predicates:

char_conversion: See the term input / output section.
double_quotes: See the term input / output section.
back_quotes: See the term input / output section.
single_quotes: See the term input / output section.
sys_cur_input: See the stream control section.
sys_cur_output: See the stream control section.
sys_cur_error: See the stream control section.
sys_tool_input: See the stream control section.
sys_tool_output: See the stream control section.
sys_tool_error: See the stream control section.
sys_mask: See the signal handling section.
sys_choices: See the signal handling section.
sys_variables: See the signal handling section.
sys_cpu_count: See the modul_thread section.
sys_runtime_version: See the modul_thread section.
sys_random: See the module random section.

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