edu.mit.csail.sdg.alloy4compiler.ast
Class ExprBad

java.lang.Object
  extended by edu.mit.csail.sdg.alloy4compiler.ast.Browsable
      extended by edu.mit.csail.sdg.alloy4compiler.ast.Expr
          extended by edu.mit.csail.sdg.alloy4compiler.ast.ExprBad

public final class ExprBad
extends Expr

Immutable; represents an illegal node.

Invariant: this.type==EMPTY && this.errors.size()==1


Field Summary
 
Fields inherited from class edu.mit.csail.sdg.alloy4compiler.ast.Expr
ambiguous, closingBracket, errors, mult, pos, weight
 
Constructor Summary
ExprBad(Pos pos, java.lang.String originalText, Err error)
          Constructs an ExprBad object.
 
Method Summary
 int getDepth()
          Returns the height of the abstract syntax tree starting from this node.
 java.lang.String getHTML()
          Returns the description (as HTML) to show for this node.
 java.util.List<? extends Browsable> getSubnodes()
          Returns a list of subnodes for this node.
 Expr resolve(Type t, java.util.Collection<ErrorWarning> warns)
          Resolves this expression if ambiguous.
 Pos span()
          Returns a Pos object representing the entire span of this Expr and all its subexpressions.
 void toString(java.lang.StringBuilder out, int indent)
          Print a textual description of it and all subnodes to a StringBuilder, with the given level of indentation.
 
Methods inherited from class edu.mit.csail.sdg.alloy4compiler.ast.Expr
and, any_arrow_lone, any_arrow_one, any_arrow_some, cardinality, cast2int, cast2sigint, closure, comprehensionOver, deNOP, div, domain, equal, equals, findAllFunctions, forAll, forLone, forNo, forOne, forSome, gt, gte, hashCode, hasVar, iff, iminus, implies, in, intersect, iplus, isSame, isSeq_arrow_lone, ite, join, lone_arrow_any, lone_arrow_lone, lone_arrow_one, lone_arrow_some, lone, loneOf, loneOf, lt, lte, minus, mul, mult, no, not, one_arrow_any, one_arrow_lone, one_arrow_one, one_arrow_some, one, oneOf, oneOf, or, override, plus, pos, product, range, reflexiveClosure, rem, resolve_as_formula, resolve_as_int, resolve_as_set, setOf, setOf, sha, shl, shr, some_arrow_any, some_arrow_lone, some_arrow_one, some_arrow_some, some, someOf, someOf, sumOver, toString, transpose, type, typecheck_as_formula, typecheck_as_int, typecheck_as_set
 
Methods inherited from class edu.mit.csail.sdg.alloy4compiler.ast.Browsable
make, make, make, make, showAsTree
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ExprBad

public ExprBad(Pos pos,
               java.lang.String originalText,
               Err error)
Constructs an ExprBad object.

Method Detail

span

public Pos span()
Returns a Pos object representing the entire span of this Expr and all its subexpressions.

Overrides:
span in class Browsable

toString

public void toString(java.lang.StringBuilder out,
                     int indent)
Print a textual description of it and all subnodes to a StringBuilder, with the given level of indentation. (If indent<0, it will be printed in one line without line break)

Specified by:
toString in class Expr

getDepth

public int getDepth()
Returns the height of the abstract syntax tree starting from this node.

Specified by:
getDepth in class Expr

resolve

public Expr resolve(Type t,
                    java.util.Collection<ErrorWarning> warns)
Resolves this expression if ambiguous. (And if t.size()>0, it represents the set of tuples whose presence/absence is relevent to the parent expression) (Note: it's possible for t to be EMPTY, or even ambiguous!)

On success: the return value will be well-typed and unambiguous

On failure: the return value's "errors" list will be nonempty

If we detect any type warnings, we will add the type warnings to the "warnings" collection.

Specified by:
resolve in class Expr
warns - - the list that will receive any warning we generate; can be null if we wish to ignore warnings

getHTML

public java.lang.String getHTML()
Returns the description (as HTML) to show for this node.

Specified by:
getHTML in class Browsable

getSubnodes

public java.util.List<? extends Browsable> getSubnodes()
Returns a list of subnodes for this node.

Specified by:
getSubnodes in class Browsable