abstract class compiler::Expr

sys::Obj
  compiler::Node
    compiler::Expr

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Expr

asTableSwitchCase

virtual Int? asTableSwitchCase()

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Return this expression as an Int literal usable in a tableswitch, or null if this Expr doesn't represent a constant Int. Expressions which work as table switch cases: int literals and enum constants

assignRequiresTempVar

virtual Bool assignRequiresTempVar()

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Assignments to instance fields require a temporary local variable.

assignTarget

virtual Obj? assignTarget()

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If this expression performs assignment, then return the target of that assignment. Otherwise return null.

commonType

static CType commonType(CNamespace ns, Expr[] exprs)

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Given a list of Expr instances, find the common base type they all share. This method does not take into account the null literal. It is used for type inference for lists and maps.

ctype

CType? ctype

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ctypes

static CType[] ctypes(Expr[] exprs)

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Map the list of expressions into their list of types

id

const ExprId id

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isAlwaysNullable

virtual Bool isAlwaysNullable()

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Return if this expression is guaranteed to sometimes return a null result (safe invoke, as, etc)

isAssignable

virtual Bool isAssignable()

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Return if this expression can be used as the left hand side of an assignment expression.

isCond

virtual Bool isCond()

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Is this a boolean conditional (boolOr/boolAnd)

isDefiniteAssign

virtual Bool isDefiniteAssign(|Expr->Bool| f)

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If this an assignment expression, then return the result of calling the given function with the LHS. Otherwise return false.

isStmt

virtual Bool isStmt()

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Does this expression make up a complete statement. If you override this to true, then you must make sure the expr is popped in CodeAsm.

leave

Bool leave := true { protected set }

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make

new make(Loc loc, ExprId id)

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makeForLiteral

static Expr makeForLiteral(Loc loc, CNamespace ns, Obj val)

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Make an Expr which will serialize the given literal.

noLeave

Expr noLeave()

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Set this expression to not be left on the stack.

print

virtual override Void print(AstWriter out)

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sameVarAs

virtual Bool sameVarAs(Expr that)

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Return if this expression represents the same variable or field as that. This is used for self assignment checks.

serialize

virtual Str serialize()

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Return this expression as serialization text or throw exception if not serializable.

synthetic

virtual Bool synthetic()

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Was this expression generated by the compiler (not necessarily everything auto-generated has this flag true, but we set in cases where error checking needs to be handled special)

toDocStr