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

java.lang.Object
  edu.mit.csail.sdg.alloy4compiler.ast.Browsable
      edu.mit.csail.sdg.alloy4compiler.ast.Expr
          edu.mit.csail.sdg.alloy4compiler.ast.ExprHasName
              edu.mit.csail.sdg.alloy4compiler.ast.ExprVar

public final class ExprVar
extends ExprHasName

Immutable; represents a LET or QUANTIFICATION variable in the AST.

Invariant: type!=EMPTY => (type==expr.type && !expr.ambiguous)

Field Summary

Fields inherited from class edu.mit.csail.sdg.alloy4compiler.ast.ExprHasName

label

Fields inherited from class edu.mit.csail.sdg.alloy4compiler.ast.Expr

ambiguous, closingBracket, errors, mult, pos, weight

Method Summary

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.
static ExprVar	make(Pos pos, java.lang.String label) Constructs an ExprVar variable with the EMPTY type
static ExprVar	make(Pos pos, java.lang.String label, Type type) Constructs an ExprVar variable with the given type
Expr	resolve(Type p, java.util.Collection<ErrorWarning> warns) Resolves this expression if ambiguous.
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.ExprHasName

getDepth, isSame, span

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, 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

Method Detail

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

make

public static ExprVar make(Pos pos,
                           java.lang.String label)

Constructs an ExprVar variable with the EMPTY type

Parameters:

pos - - the original position in the source file (can be null if unknown)

label - - the label for this variable (it is only used for pretty-printing and does not have to be unique)

make

public static ExprVar make(Pos pos,
                           java.lang.String label,
                           Type type)

Constructs an ExprVar variable with the given type

Parameters:

pos - - the original position in the source file (can be null if unknown)

label - - the label for this variable (it is only used for pretty-printing and does not have to be unique)

type - - the type

resolve

public Expr resolve(Type p,
                    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