Module ast 

This module implements an abstract syntax tree for VHDL. It is emitted by the parser.

Re-exports

pub use self::ExprData::*;

pub use self::StmtData::*;

pub use self::TypeData::*;

Structs

AliasDecl

An alias declaration.

ArchBody

An architecture body.

AttrDecl

BindingInd

BlockCompCfg

CfgDecl

A configuration declaration.

CfgSpec

CompDecl

A component declaration.

CompoundName

A compound name consisting of a primary name (identifier, character literal, or string literal), and zero or more suffices (select, attribute, call). The names in IEEE 1076-2008 section 8.1 map to this as follows:

CondWave

A conditional wave.

CtxDecl

A context declaration.

DesignUnit

A design unit. Multiple design units make up a design file. Each unit consists of an optional context clause followed by a primary or secondary unit.

DisconSpec

EntityDecl

An entity declaration.

Expr

An expression.

GenBody

GroupDecl

Ident

An identifier. Has a node ID such that it may be referenced later on.

IntfObjDecl

An interface object declaration.

IntfSubprogDecl

NodeId

A positive, small ID assigned to each node in the AST. Used as a lightweight way to refer to individual nodes, e.g. during symbol table construction and name resolution.

ObjDecl

ParenElem

A parenthesized expression element. A parenthesized expression contains elements of which each may either be a simple <expr>, or an association of the form <choices> => <expr>.

PkgBody

A package body.

PkgDecl

A package declaration.

PkgInst

A package instantiation declaration.

PrimaryName

SelectWave

A selected wave. The second element of the tuple represents the choices for which this wave would be selected.

Signature

Stmt

StmtBody

The body of an if, loop, or case statement.

Subprog

SubprogSpec

SubtypeDecl

SubtypeInd

TypeDecl

A type declaration. If the data field is omitted, this is an incomplete declaration.

Wave

Enums

AssignKind

AssignMode

AssignTarget

AttrData

AttrTarget

BinaryOp

BlockCompSpec

CtxItem

A context item, multiple of which make up a context clause.

DeclItem

A declarative item.

DelayMech

DesignUnitData

Dir

DisconTarget

EntityAspect

EntityClass

ExprData

The data associated with a specific expression.

ForceMode

GroupData

InstTarget

IntfDecl

An interface declaration.

IntfMode

IntfObjKind

LogicalOp

LoopScheme

NamePart

NexitMode

ObjDetail

Additional mutually exclusive details that may be provided with an object declaration.

ObjKind

PortgenKind

PrimaryNameKind

RelationalOp

ResolInd

SelectAssignMode

Sensitivity

ShiftOp

Sign

StmtData

SubprogData

SubprogDefault

SubprogKind

SubprogPurity

TypeData

UnaryOp

Constants

DUMMY_NODE_ID

During parsing and syntax tree construction, we assign each node this ID. Only later, during the renumbering pass do we assign actual IDs to each node.

Type Aliases

Choices

ParenElems

A vector of parenthesized expression elements, including the span of the expression that this would cover.