Expression Evaluation Functions

Description

Functions to help with evaluating expressions.

Name: Description
*expression_fold_constants Function: Fold constants in expression.
*property_filter Function: Create a property filter that can be used with any of the property enumerators - crlf delimited list of property patterns to match (or if prefixed with '-', properties to exclude).
*substitute Function: Substitute 'local' tags in an expression - allows optimization of expressions with lots of repeated, potentially expensive tokens.
*summary_default_group_get Function: Return default group for an expression given a variable context - optional format can include $O-over $E-each.
a5_argumentsreplace Function: Replace Arguments in a filter expression or SQL with their actual values.
a5_definearguments Function: Brings up builder allowing user to specify arguments for Link builder
A5_EVAL_EXPRESSION Function: Used in code generated by the Script Genie. If expression starts with = then it evaluates it as an expression in the context of the current form.
a5_evalvalueexpr Function: Evaluate an expression where <value> has been used as a placeholder
a5_expression_library Function: Displays the Expression Library
a5_function_finder Function: Helps a user select a function. Inserts the function into the expression builder or script editor.
a5_gen_filter_component Function: Called in Action Script Genie to generate a filter expression component
a5_get_expression_longnames Function: Same as a5_get_expression2(), but full qualified all field names, including fields from the parent table.
a5_make_search_expn Function: Makes a search expression from the QBF style input into a field control. Style 1 = exact match, 2 = contains, 3 = starts with, 4 = exact match, but supports wildcard characters % _ * ? . Type for dates can include format: D:m/d or D:d/m (format indicates format in which date value appears)
a5_parse_top_x_filter Function: Parses a filter expression and returns the top_x components
a5_prompt_special_filter Function: Prompts for a filter and order expression
a5_simpleargumentdefinition Function: Used to define Arguments using a simplified syntax: CRLF or comma delimited list of form :argname|type, or :argname|type|defaultvalue
a5_unflatten_query Function: Removes the flattenquery() from a filter expression
a5_validate_Xbasic_expression Function: Validates an Xbasic expression
BETWEEN_CHAR Function: Creates a string using the Between() function.
BETWEEN_DATE Function: Creates a string using the Between() function
BETWEEN_NUM Function: Creates a string using the Between() function
BETWEEN_RECORD Function: Creates a string using the Between() function to search for a range of records numbers.
combine_filters Function: Combine two filter expressions into a single filter expression.
eval_variables_valid Function: Returns if the expression is valid (i.e. all the fields are defined).
EVALUATE_TEMPLATE Function: Evaluate code with optional macros.
EVALUATE_TEMPLATE_PRIVATE Function: Evaluate code with optional macros in its own variable namespace.
expression_demote_unique_keys Function: Demotes unique key for current table, or given a structure, the last table in the CR-LF delimited list of tables.
expression_encode Function: Encodes an exression that contains parameter placeholders.
expression_reduce_filter Function: Reduce a filter to only those sub-expressions that relate to a named table.
filter_library_by_tags Function: Filter AEX file, using list of tags with +- prefix (+ means only include tags that have one of these, - means exclude tags that include these).
getfieldsinexpression Function: Returns a CRLF delimited list of fieldnames in an expression
IF Function: Tests an expression and returns one of two expressions.
SELECTLIST Function: Selects value from list of parameters based on index (1 for first value,2 for second etc). Values can be mixed types, a NIL is returned if none match.
template_to_expression Function: From a template, following cr-lf delimited rules, convert to expression.