feat(compiler): port parser implementation based on work by @znck and @mysticatea

packages/compiler-core/src/ast.ts

@@ -0,0 +1,87 @@
+export const enum NodeTypes {
+  TEXT,
+  COMMENT,
+  ELEMENT,
+  ATTRIBUTE,
+  EXPRESSION,
+  DIRECTIVE,
+  ROOT
+}
+
+export const enum ElementTypes {
+  ELEMENT,
+  COMPONENT,
+  SLOT, // slot
+  TEMPLATE // template, component
+}
+
+export const enum Namespaces {
+  HTML,
+  SVG, // allows CDATA section and forbids end tag omission.
+  MATH_ML // allows CDATA section and forbids end tag omission.
+}
+
+export interface Node {
+  type: NodeTypes
+  loc: SourceLocation
+}
+
+export interface RootNode extends Node {
+  type: NodeTypes.ROOT
+  children: Array<ElementNode | ExpressionNode | TextNode | CommentNode>
+}
+
+export interface ElementNode extends Node {
+  type: NodeTypes.ELEMENT
+  ns: Namespaces
+  tag: string
+  tagType: ElementTypes
+  isSelfClosing: boolean
+  props: Array<AttributeNode | DirectiveNode>
+  children: Array<ElementNode | ExpressionNode | TextNode | CommentNode>
+}
+
+export interface TextNode extends Node {
+  type: NodeTypes.TEXT
+  content: string
+  isEmpty: boolean
+}
+
+export interface CommentNode extends Node {
+  type: NodeTypes.COMMENT
+  content: string
+}
+
+export interface AttributeNode extends Node {
+  type: NodeTypes.ATTRIBUTE
+  name: string
+  value: TextNode | undefined
+}
+
+export interface DirectiveNode extends Node {
+  type: NodeTypes.DIRECTIVE
+  name: string
+  exp: ExpressionNode | undefined
+  arg: ExpressionNode | undefined
+  modifiers: string[]
+}
+
+export interface ExpressionNode extends Node {
+  type: NodeTypes.EXPRESSION
+  content: string
+  isStatic: boolean
+}
+
+export interface Position {
+  offset: number // from start of file
+  line: number
+  column: number
+}
+
+// The node's range. The `start` is inclusive and `end` is exclusive.
+// [start, end)
+export interface SourceLocation {
+  start: Position
+  end: Position
+  source: string
+}