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# dmd.staticcond

Lazily evaluate static conditions for static if, static assert and template constraints.
Authors:
Walter Bright
License:
Boost License 1.0

Source staticcond.d

Documentation https://dlang.org/phobos/dmd_staticcond.html

Coverage https://codecov.io/gh/dlang/dmd/src/master/src/dmd/staticcond.d

bool `evalStaticCondition`(Scope* `sc`, Expression `original`, Expression `e`, out bool `errors`, Expressions* `negatives` = null);
  Semantically analyze and then evaluate a static condition at compile time. This is special because short circuit operators &&, || and ?: at the top level are not semantically analyzed if the result of the expression is not necessary.
  Parameters:

  Scope* `sc` | instantiating scope
  Expression `original` | original expression, for error messages
  Expression `e` | resulting expression
  bool `errors` | set to true if errors occurred
  Expressions* `negatives` | array to store negative clauses

  Returns:
  true if evaluates to true
const(char)* `visualizeStaticCondition`(Expression `original`, Expression `instantiated`, const Expression[] `negatives`, bool `full`, ref uint `itemCount`);
  Format a static condition as a tree-like structure, marking failed and bypassed expressions.
  Parameters:

  Expression `original` | original expression
  Expression `instantiated` | instantiated expression
  Expression[] `negatives` | array with negative clauses from `instantiated` expression
  bool `full` | controls whether it shows the full output or only failed parts
  uint `itemCount` | returns the number of written clauses

  Returns:
  formatted string or null if the expressions were null, or if the instantiated expression is not based on the original one

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