How to list Context flags

There is an explanation of the purpose of many of these flags at Context flags.

Listing Context Flags using PGLabs

You can obtain a complete list of contextFlags from one of the current contexts using the PGLabs and this code snippet:

Context("Vector");
TEXT(Context()->{name}, $BR);
TEXT(pretty_print(Context()->{flags}));

You could also load in one of the customized contexts such as contextCurrency.pl

loadMacros("contextCurrency.pl");
Context("Currency");
Context()->flags->set(trimTrailingZeros=>1);
TEXT(Context()->{name}, $BR);
TEXT(pretty_print(Context()->{flags}));

which will produce the output below. Notice that the trimTrailingZeros flag has been set to 1 (the default is 0 ).

Currency
HASH(0xc8c1988)

allowBadFunctionInputs	=>	0
allowBadOperands	=>	0
allowEmptyStrings	=>	1
allowMissingFunctionInputs	=>	0
allowMissingOperands	=>	0
allowWrongArgCount	=>	0
checkUndefinedPoints	=>	0
forceCommas	=>	0
forceDecimals	=>	0
formatStudentAnswer	=>	evaluated
granularity	=>	1000
ignoreEndpointTypes	=>	0
ijk	=>	0
ijkAnyDimension	=>	1
infiniteWord	=>	infinity
limits	=>	( -2 , 2 , )
max_adapt	=>	100000000
max_undefined	=>
noExtraDecimals	=>	1
num_points	=>	5
promoteReals	=>	1
reduceConstantFunctions	=>	1
reduceConstants	=>	1
reduceSets	=>	1
reduceSetsForComparison	=>	1
reduceUnions	=>	1
reduceUnionsForComparison	=>	1
resolution	=>
showExtraParens	=>	1
tolType	=>	absolute
tolerance	=>	0.005
trimTrailingZeros	=>	1
useBaseTenLog	=>	0
useFuzzyReals	=>	1
zeroLevel	=>	1e-14
zeroLevelTol	=>	1e-12

Listing Context Flags in an existing WeBWorK question

• Set your Context, e.g.

Context("Your Context Here");  #  or don't do anything to see flags from the current context

• Enter the text

TEXT(pretty_print(Context()->{flags}));

• View the problem

See also

The file PGinfo.pl has other macros that can be used in a PG problem to discover what flags and constants are defined in the current environment type:

loadMacros("PGinfo.pl");
listVariables();

This will print (too much) information -- but it's useful for debugging and for learning the language.

See http://webwork.maa.org/doc/cvs/pg_CURRENT/macros/PGinfo.pl.html