956 lines
26 KiB
TypeScript
956 lines
26 KiB
TypeScript
import { lezerToParseTree } from "../../client/markdown_parser/parse_tree.ts";
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import {
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cleanTree,
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type ParseTree,
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} from "@silverbulletmd/silverbullet/lib/tree";
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import { parser } from "./parse-lua.js";
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import { styleTags, tags as t } from "@lezer/highlight";
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import { indentNodeProp, LRLanguage } from "@codemirror/language";
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import type {
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ASTCtx,
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LuaAttName,
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LuaBlock,
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LuaExpression,
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LuaFunctionBody,
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LuaFunctionCallExpression,
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LuaFunctionCallStatement,
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LuaFunctionName,
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LuaIfStatement,
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LuaLValue,
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LuaOrderBy,
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LuaPrefixExpression,
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LuaQueryClause,
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LuaStatement,
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LuaTableField,
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} from "./ast.ts";
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import { LuaAttribute } from "./ast.ts";
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import { getBlockGotoMeta } from "./labels.ts";
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import { LuaRuntimeError, LuaStackFrame } from "./runtime.ts";
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const luaStyleTags = styleTags({
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Name: t.variableName,
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LiteralString: t.string,
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Number: t.number,
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CompareOp: t.operator,
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"true false": t.bool,
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Comment: t.lineComment,
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"return break goto do end while repeat until function local if then else elseif in for nil or and not query from where limit select order by desc":
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t.keyword,
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});
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const customIndent = indentNodeProp.add({
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"IfStatement FuncBody WhileStatement ForStatement TableConstructor": (
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context,
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) => {
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return context.lineIndent(context.node.from) + context.unit;
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},
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});
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// Use the customIndent in your language support
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export const luaLanguage = LRLanguage.define({
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name: "space-lua",
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parser: parser.configure({
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props: [
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luaStyleTags,
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customIndent,
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],
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}),
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languageData: {
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commentTokens: { line: "--", block: { open: "--[[", close: "--]]" } },
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},
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});
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function context(t: ParseTree, ctx: Record<string, any>): ASTCtx {
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return { ...ctx, from: t.from, to: t.to };
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}
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function parseChunk(t: ParseTree, ctx: ASTCtx): LuaBlock {
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if (t.type !== "Chunk") {
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throw new Error(`Expected Chunk, got ${t.type}`);
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}
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return parseBlock(t.children![0], ctx);
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}
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function hasCloseLocal(names: LuaAttName[] | undefined): boolean {
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if (!names) {
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return false;
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}
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for (const n of names) {
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if (n.attributes?.includes(LuaAttribute.Close) === true) {
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return true;
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}
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}
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return false;
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}
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function parseBlock(t: ParseTree, ctx: ASTCtx): LuaBlock {
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if (t.type !== "Block") {
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throw new Error(`Expected Block, got ${t.type}`);
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}
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const stmtNodes = t.children!.filter((c) => c && c.type);
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const statements = stmtNodes.map((s) => parseStatement(s, ctx));
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const block: LuaBlock = { type: "Block", statements, ctx: context(t, ctx) };
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let hasLabel = false;
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let hasGoto = false;
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let hasLocalDecl = false;
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let dup: { name: string; ctx: ASTCtx } | undefined;
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let hasLabelHere = false;
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let hasCloseHere = false;
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const seen = new Set<string>();
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for (const s of statements) {
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switch (s.type) {
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case "Label": {
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hasLabel = true;
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hasLabelHere = true;
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// Duplicate labels in the same block are illegal
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const name = (s as any).name as string;
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if (!dup) {
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if (seen.has(name)) {
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dup = { name, ctx: (s as any).ctx as ASTCtx };
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} else {
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seen.add(name);
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}
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}
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break;
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}
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case "Goto": {
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hasGoto = true;
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break;
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}
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case "Local": {
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hasLocalDecl = true;
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if (!hasCloseHere) {
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hasCloseHere = hasCloseLocal((s as any).names as LuaAttName[]);
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}
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break;
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}
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case "LocalFunction": {
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hasLocalDecl = true;
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break;
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}
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case "Block": {
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const child = s as LuaBlock;
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hasLabel = hasLabel || !!child.hasLabel;
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hasGoto = hasGoto || !!child.hasGoto;
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hasCloseHere = hasCloseHere || !!child.hasCloseHere;
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break;
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}
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case "If": {
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const iff = s as LuaIfStatement;
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for (const c of iff.conditions) {
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hasLabel = hasLabel || !!c.block.hasLabel;
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hasGoto = hasGoto || !!c.block.hasGoto;
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hasCloseHere = hasCloseHere || !!c.block.hasCloseHere;
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}
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if (iff.elseBlock) {
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hasLabel = hasLabel || !!iff.elseBlock.hasLabel;
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hasGoto = hasGoto || !!iff.elseBlock.hasGoto;
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hasCloseHere = hasCloseHere || !!iff.elseBlock.hasCloseHere;
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}
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break;
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}
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case "While":
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case "Repeat":
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case "For": {
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const child = (s as any).block as LuaBlock;
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hasLabel = hasLabel || !!child.hasLabel;
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hasGoto = hasGoto || !!child.hasGoto;
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hasCloseHere = hasCloseHere || !!child.hasCloseHere;
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break;
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}
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case "ForIn": {
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const child = (s as any).block as LuaBlock;
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hasLabel = hasLabel || !!child.hasLabel;
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hasGoto = hasGoto || !!child.hasGoto;
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hasCloseHere = true;
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break;
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}
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default: {
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break;
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}
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}
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}
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if (hasLabel) {
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block.hasLabel = true;
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}
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if (hasGoto) {
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block.hasGoto = true;
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}
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if (dup) {
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block.dupLabelError = dup;
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}
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if (hasLocalDecl) {
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block.needsEnv = true;
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}
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if (hasLabelHere) {
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block.hasLabelHere = true;
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}
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if (hasCloseHere) {
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block.hasCloseHere = true;
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}
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return block;
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}
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function parseStatement(t: ParseTree, ctx: ASTCtx): LuaStatement {
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if (!t || !t.type) {
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return {
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type: "Semicolon",
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ctx: context(t, ctx),
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};
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}
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switch (t.type) {
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case "Block":
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return parseChunk(t.children![0], ctx);
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case "Semicolon":
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return { type: "Semicolon", ctx: context(t, ctx) };
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case "Label":
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return {
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type: "Label",
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name: t.children![1].children![0].text!,
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ctx: context(t, ctx),
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};
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case "Break":
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return { type: "Break", ctx: context(t, ctx) };
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case "Goto":
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return {
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type: "Goto",
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name: t.children![1].children![0].text!,
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ctx: context(t, ctx),
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};
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case "Scope":
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return parseBlock(t.children![1], ctx);
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case ";":
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return { type: "Semicolon", ctx: context(t, ctx) };
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case "WhileStatement":
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return {
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type: "While",
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condition: parseExpression(t.children![1], ctx),
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block: parseBlock(t.children![3], ctx),
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ctx: context(t, ctx),
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};
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case "RepeatStatement":
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return {
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type: "Repeat",
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block: parseBlock(t.children![1], ctx),
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condition: parseExpression(t.children![3], ctx),
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ctx: context(t, ctx),
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};
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case "IfStatement": {
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const conditions: {
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condition: LuaExpression;
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block: LuaBlock;
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from?: number;
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to?: number;
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}[] = [];
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let elseBlock: LuaBlock | undefined = undefined;
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for (let i = 0; i < t.children!.length; i += 4) {
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const child = t.children![i];
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if (!child || !child.children || !child.children[0]) {
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continue;
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}
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const token = child.children![0].text;
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if (token === "if" || token === "elseif") {
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conditions.push({
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condition: parseExpression(t.children![i + 1], ctx),
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block: parseBlock(t.children![i + 3], ctx),
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from: child.from,
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to: child.to,
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});
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} else if (token === "else") {
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elseBlock = parseBlock(t.children![i + 1], ctx);
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} else if (token === "end") {
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break;
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} else {
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throw new Error(`Unknown if clause type: ${token}`);
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}
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}
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return {
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type: "If",
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conditions,
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elseBlock,
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ctx: context(t, ctx),
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};
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}
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case "ForStatement":
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if (t.children![1].type === "ForNumeric") {
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const forNumeric = t.children![1];
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return {
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type: "For",
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name: forNumeric.children![0].children![0].text!,
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start: parseExpression(forNumeric.children![2], ctx),
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end: parseExpression(forNumeric.children![4], ctx),
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step: forNumeric.children![5]
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? parseExpression(forNumeric.children![6], ctx)
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: undefined,
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block: parseBlock(t.children![3], ctx),
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ctx: context(t, ctx),
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};
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} else {
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const forGeneric = t.children![1];
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return {
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type: "ForIn",
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names: parseNameList(forGeneric.children![0]),
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expressions: parseExpList(forGeneric.children![2], ctx),
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block: parseBlock(t.children![3], ctx),
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ctx: context(t, ctx),
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};
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}
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case "Function":
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return {
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type: "Function",
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name: parseFunctionName(t.children![1], ctx),
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body: parseFunctionBody(t.children![2], ctx),
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ctx: context(t, ctx),
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};
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case "LocalFunction":
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return {
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type: "LocalFunction",
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name: t.children![2].children![0].text!,
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body: parseFunctionBody(t.children![3], ctx),
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ctx: context(t, ctx),
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};
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case "FunctionCall":
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return {
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type: "FunctionCallStatement",
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call: parseFunctionCall(t, ctx),
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ctx: context(t, ctx),
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};
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case "Assign":
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return {
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type: "Assignment",
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variables: t.children![0].children!
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.filter((c) => c.type && c.type !== ",")
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.map((lvalue) => parseLValue(lvalue, ctx)),
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expressions: parseExpList(t.children![2], ctx),
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ctx: context(t, ctx),
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};
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case "Local": {
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const names = parseAttNames(t.children![1], ctx);
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let closeCount = 0;
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for (const n of names) {
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if (n.attributes?.includes(LuaAttribute.Close) === true) {
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closeCount++;
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if (closeCount > 1) {
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throw new Error("multiple <close> variables in local list");
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}
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}
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}
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return {
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type: "Local",
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names,
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expressions: t.children![3] ? parseExpList(t.children![3], ctx) : [],
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ctx: context(t, ctx),
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};
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}
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case "ReturnStatement": {
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const expressions = t.children![1]
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? parseExpList(t.children![1], ctx)
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: [];
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return { type: "Return", expressions, ctx: context(t, ctx) };
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}
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case "break":
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return { type: "Break", ctx: context(t, ctx) };
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default:
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// Gracefully ignore unknown empty nodes
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if (!t.children || t.children.length === 0) {
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return {
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type: "Semicolon",
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ctx: context(t, ctx),
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};
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}
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console.error(t);
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throw new Error(
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`Unknown statement type: ${
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t.children![0] && t.children![0].text
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? t.children![0].text
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: String(t.type)
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}`,
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);
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}
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}
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function parseFunctionCall(
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t: ParseTree,
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ctx: ASTCtx,
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): LuaFunctionCallExpression {
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if (t.children![1] && t.children![1].type === ":") {
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return {
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type: "FunctionCall",
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prefix: parsePrefixExpression(t.children![0], ctx),
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name: t.children![2].children![0].text!,
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args: parseFunctionArgs(t.children!.slice(3), ctx),
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ctx: context(t, ctx),
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};
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}
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return {
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type: "FunctionCall",
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prefix: parsePrefixExpression(t.children![0], ctx),
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args: parseFunctionArgs(t.children!.slice(1), ctx),
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ctx: context(t, ctx),
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};
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}
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function parseAttNames(t: ParseTree, ctx: ASTCtx): LuaAttName[] {
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if (t.type !== "AttNameList") {
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throw new Error(`Expected AttNameList, got ${t.type}`);
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}
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return t.children!
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.filter((c) => c.type && c.type !== ",")
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.map((att) => parseAttName(att, ctx));
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}
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function parseAttName(t: ParseTree, ctx: ASTCtx): LuaAttName {
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if (t.type !== "AttName") {
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throw new Error(`Expected AttName, got ${t.type}`);
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}
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const attribute = t.children![1].children![1]
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? t.children![1].children![1].children![0].text!
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: undefined;
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if (
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attribute &&
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attribute !== LuaAttribute.Const &&
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attribute !== LuaAttribute.Close
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) {
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throw new Error(`unknown attribute '${attribute}'`);
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}
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const attributes = attribute ? [attribute as LuaAttribute] : undefined;
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return {
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type: "AttName",
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name: t.children![0].children![0].text!,
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attribute,
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attributes,
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ctx: context(t, ctx),
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};
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}
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function parseLValue(t: ParseTree, ctx: ASTCtx): LuaLValue {
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switch (t.type) {
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case "Name":
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return {
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type: "Variable",
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name: t.children![0].text!,
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ctx: context(t, ctx),
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};
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case "Property":
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return {
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type: "PropertyAccess",
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object: parsePrefixExpression(t.children![0], ctx),
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property: t.children![2].children![0].text!,
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ctx: context(t, ctx),
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};
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case "MemberExpression":
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return {
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type: "TableAccess",
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object: parsePrefixExpression(t.children![0], ctx),
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key: parseExpression(t.children![2], ctx),
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ctx: context(t, ctx),
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};
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default:
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console.error(t);
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throw new Error(`Unknown lvalue type: ${t.type}`);
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}
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}
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function parseFunctionName(t: ParseTree, ctx: ASTCtx): LuaFunctionName {
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if (t.type !== "FuncName") {
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throw new Error(`Expected FunctionName, got ${t.type}`);
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}
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const propNames: string[] = [];
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let colonName: string | undefined = undefined;
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for (let i = 0; i < t.children!.length; i += 2) {
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const prop = t.children![i];
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propNames.push(prop.children![0].text!);
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if (t.children![i + 1] && t.children![i + 1].type === ":") {
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colonName = t.children![i + 2].children![0].text!;
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break;
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}
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}
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return {
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type: "FunctionName",
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propNames,
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colonName,
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ctx: context(t, ctx),
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};
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}
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function parseNameList(t: ParseTree): string[] {
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if (t.type !== "NameList") {
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throw new Error(`Expected NameList, got ${t.type}`);
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}
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return t.children!
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.filter((c) => c.type === "Name")
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.map((c) => c.children![0].text!);
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}
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function parseExpList(t: ParseTree, ctx: ASTCtx): LuaExpression[] {
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if (t.type !== "ExpList") {
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throw new Error(`Expected ExpList, got ${t.type}`);
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}
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return t.children!
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.filter((c) => c.type && c.type !== ",")
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.map((e) => parseExpression(e, ctx));
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}
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const delimiterRegex = /^(\[=*\[)([\s\S]*)(\]=*\])$/;
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// In case of quoted strings, remove the quotes and unescape the string
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// In case of a [[ type ]] literal string, remove the brackets
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function parseString(s: string): string {
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// Handle long strings with delimiters
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const delimiterMatch = s.match(delimiterRegex);
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if (delimiterMatch) {
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let text = delimiterMatch[2];
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// According to Lua semantics, whenever a [[ formatted string starts with a newline, that newline should be skipped
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if (text[0] === "\n") {
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text = text.slice(1);
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}
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return text;
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}
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return s.slice(1, -1).replace(
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/\\(x[0-9a-fA-F]{2}|u\{[0-9a-fA-F]+\}|[abfnrtv\\'"n])/g,
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(match, capture) => {
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switch (capture) {
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case "a":
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return "\x07"; // Bell
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case "b":
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return "\b"; // Backspace
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case "f":
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return "\f"; // Form feed
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case "n":
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return "\n"; // Newline
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case "r":
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return "\r"; // Carriage return
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case "t":
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return "\t"; // Horizontal tab
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case "v":
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return "\v"; // Vertical tab
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case "\\":
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return "\\"; // Backslash
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case '"':
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return '"'; // Double quote
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case "'":
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return "'"; // Single quote
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default:
|
|
// Handle hexadecimal \x00
|
|
if (capture.startsWith("x")) {
|
|
return String.fromCharCode(parseInt(capture.slice(1), 16));
|
|
}
|
|
// Handle unicode \u{XXXX}
|
|
if (capture.startsWith("u{")) {
|
|
const codePoint = parseInt(capture.slice(2, -1), 16);
|
|
return String.fromCodePoint(codePoint);
|
|
}
|
|
return match; // return the original match if nothing fits
|
|
}
|
|
},
|
|
);
|
|
}
|
|
|
|
function parseExpression(t: ParseTree, ctx: ASTCtx): LuaExpression {
|
|
if (!t || !t.type) {
|
|
throw new Error("Undefined expression node");
|
|
}
|
|
switch (t.type) {
|
|
case "LiteralString": {
|
|
const cleanString = parseString(t.children![0].text!);
|
|
return {
|
|
type: "String",
|
|
value: cleanString,
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
case "Number": {
|
|
const text = t.children![0].text!.toLowerCase();
|
|
return {
|
|
type: "Number",
|
|
// Use the integer parser fox 0x literals
|
|
value: text.includes("x") ? parseInt(text) : parseFloat(text),
|
|
numericType: /[\.eEpP]/.test(text) ? "float" : "int",
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
case "BinaryExpression":
|
|
return {
|
|
type: "Binary",
|
|
operator: t.children![1].children![0].text!,
|
|
left: parseExpression(t.children![0], ctx),
|
|
right: parseExpression(t.children![2], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "UnaryExpression":
|
|
return {
|
|
type: "Unary",
|
|
operator: t.children![0].children![0].text!,
|
|
argument: parseExpression(t.children![1], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "Property":
|
|
return {
|
|
type: "PropertyAccess",
|
|
object: parsePrefixExpression(t.children![0], ctx),
|
|
property: t.children![2].children![0].text!,
|
|
ctx: context(t, ctx),
|
|
};
|
|
|
|
case "MemberExpression":
|
|
return {
|
|
type: "TableAccess",
|
|
object: parsePrefixExpression(t.children![0], ctx),
|
|
key: parseExpression(t.children![2], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
|
|
case "Parens":
|
|
return parseExpression(t.children![1], ctx);
|
|
case "FunctionCall": {
|
|
return parseFunctionCall(t, ctx);
|
|
}
|
|
case "FunctionDef": {
|
|
const body = parseFunctionBody(t.children![1], ctx);
|
|
return {
|
|
type: "FunctionDefinition",
|
|
body,
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
case "Name":
|
|
return {
|
|
type: "Variable",
|
|
name: t.children![0].text!,
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "Ellipsis":
|
|
return { type: "Variable", name: "...", ctx: context(t, ctx) };
|
|
case "true":
|
|
return { type: "Boolean", value: true, ctx: context(t, ctx) };
|
|
case "false":
|
|
return { type: "Boolean", value: false, ctx: context(t, ctx) };
|
|
case "TableConstructor":
|
|
return {
|
|
type: "TableConstructor",
|
|
fields: t.children!
|
|
.slice(1, -1)
|
|
.filter((c) =>
|
|
["FieldExp", "FieldProp", "FieldDynamic"].includes(c.type!)
|
|
)
|
|
.map((tf) => parseTableField(tf, ctx)),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "nil":
|
|
return { type: "Nil", ctx: context(t, ctx) };
|
|
case "Query":
|
|
return {
|
|
type: "Query",
|
|
clauses: t.children!.slice(2, -1).map((c) => parseQueryClause(c, ctx)),
|
|
ctx: context(t, ctx),
|
|
};
|
|
default:
|
|
console.error(t);
|
|
throw new Error(`Unknown expression type: ${t.type}`);
|
|
}
|
|
}
|
|
|
|
function parseQueryClause(t: ParseTree, ctx: ASTCtx): LuaQueryClause {
|
|
if (t.type !== "QueryClause") {
|
|
throw new Error(`Expected QueryClause, got ${t.type}`);
|
|
}
|
|
t = t.children![0];
|
|
switch (t.type) {
|
|
case "FromClause": {
|
|
if (t.children!.length === 4) {
|
|
// From clause with a name
|
|
return {
|
|
type: "From",
|
|
name: t.children![1].children![0].text!,
|
|
expression: parseExpression(t.children![3], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
} else {
|
|
return {
|
|
type: "From",
|
|
expression: parseExpression(t.children![1], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
}
|
|
case "WhereClause":
|
|
return {
|
|
type: "Where",
|
|
expression: parseExpression(t.children![1], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "LimitClause": {
|
|
const limit = parseExpression(t.children![1], ctx);
|
|
const offset = t.children![2]
|
|
? parseExpression(t.children![3], ctx)
|
|
: undefined;
|
|
return {
|
|
type: "Limit",
|
|
limit,
|
|
offset,
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
case "OrderByClause": {
|
|
const orderBy: LuaOrderBy[] = [];
|
|
for (const child of t.children!) {
|
|
if (child.type === "OrderBy") {
|
|
orderBy.push({
|
|
type: "Order",
|
|
expression: parseExpression(child.children![0], ctx),
|
|
direction: child.children![1]?.type === "desc" ? "desc" : "asc",
|
|
ctx: context(child, ctx),
|
|
});
|
|
}
|
|
}
|
|
return {
|
|
type: "OrderBy",
|
|
orderBy,
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
case "SelectClause": {
|
|
return {
|
|
type: "Select",
|
|
expression: parseExpression(t.children![1], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
default:
|
|
console.error(t);
|
|
throw new Error(`Unknown query clause type: ${t.type}`);
|
|
}
|
|
}
|
|
|
|
function parseFunctionArgs(ts: ParseTree[], ctx: ASTCtx): LuaExpression[] {
|
|
return ts
|
|
.filter((t) => t.type && ![",", "(", ")"].includes(t.type))
|
|
.map((e) => parseExpression(e, ctx));
|
|
}
|
|
|
|
function parseFunctionBody(t: ParseTree, ctx: ASTCtx): LuaFunctionBody {
|
|
if (t.type !== "FuncBody") {
|
|
throw new Error(`Expected FunctionBody, got ${t.type}`);
|
|
}
|
|
return {
|
|
type: "FunctionBody",
|
|
parameters: t.children![1].children!
|
|
.filter((c) => c.type && ["Name", "Ellipsis"].includes(c.type))
|
|
.map((c) => c.children![0].text!),
|
|
block: parseBlock(t.children![3], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
}
|
|
|
|
function parsePrefixExpression(t: ParseTree, ctx: ASTCtx): LuaPrefixExpression {
|
|
if (!t || !t.type) {
|
|
throw new Error("Undefined prefix expression node");
|
|
}
|
|
switch (t.type) {
|
|
case "Name":
|
|
return {
|
|
type: "Variable",
|
|
name: t.children![0].text!,
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "Property":
|
|
return {
|
|
type: "PropertyAccess",
|
|
object: parsePrefixExpression(t.children![0], ctx),
|
|
property: t.children![2].children![0].text!,
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "MemberExpression":
|
|
return {
|
|
type: "TableAccess",
|
|
object: parsePrefixExpression(t.children![0], ctx),
|
|
key: parseExpression(t.children![2], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "Parens":
|
|
return {
|
|
type: "Parenthesized",
|
|
expression: parseExpression(t.children![1], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "FunctionCall": {
|
|
return parseFunctionCall(t, ctx);
|
|
}
|
|
default:
|
|
console.error(t);
|
|
throw new Error(`Unknown prefix expression type: ${t.type}`);
|
|
}
|
|
}
|
|
|
|
function parseTableField(t: ParseTree, ctx: ASTCtx): LuaTableField {
|
|
switch (t.type) {
|
|
case "FieldExp":
|
|
return {
|
|
type: "ExpressionField",
|
|
value: parseExpression(t.children![0], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "FieldProp":
|
|
return {
|
|
type: "PropField",
|
|
key: t.children![0].children![0].text!,
|
|
value: parseExpression(t.children![2], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
case "FieldDynamic":
|
|
return {
|
|
type: "DynamicField",
|
|
key: parseExpression(t.children![1], ctx),
|
|
value: parseExpression(t.children![4], ctx),
|
|
ctx: context(t, ctx),
|
|
};
|
|
default:
|
|
console.error(t);
|
|
throw new Error(`Unknown table field type: ${t.type}`);
|
|
}
|
|
}
|
|
|
|
export function stripLuaComments(s: string): string {
|
|
let result = "";
|
|
let i = 0;
|
|
|
|
while (i < s.length) {
|
|
// Check for long string
|
|
if (s[i] === "[") {
|
|
let j = i + 1;
|
|
let equalsCount = 0;
|
|
while (s[j] === "=") {
|
|
equalsCount++;
|
|
j++;
|
|
}
|
|
if (s[j] === "[") {
|
|
// Found long string start
|
|
const openBracket = s.substring(i, j + 1);
|
|
const closeBracket = "]" + "=".repeat(equalsCount) + "]";
|
|
result += openBracket;
|
|
i = j + 1;
|
|
|
|
// Find matching closing bracket
|
|
const content = s.substring(i);
|
|
const closeIndex = content.indexOf(closeBracket);
|
|
if (closeIndex !== -1) {
|
|
// Copy string content verbatim, including any comment-like sequences
|
|
result += content.substring(0, closeIndex) + closeBracket;
|
|
i += closeIndex + closeBracket.length;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check for single quoted string
|
|
if (s[i] === '"' || s[i] === "'") {
|
|
const quote = s[i];
|
|
result += quote;
|
|
i++;
|
|
while (i < s.length && s[i] !== quote) {
|
|
if (s[i] === "\\") {
|
|
result += s[i] + s[i + 1];
|
|
i += 2;
|
|
} else {
|
|
result += s[i];
|
|
i++;
|
|
}
|
|
}
|
|
if (i < s.length) {
|
|
result += s[i]; // closing quote
|
|
i++;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// Check for comments
|
|
if (s[i] === "-" && s[i + 1] === "-") {
|
|
// Replace the -- with spaces
|
|
result += " ";
|
|
i += 2;
|
|
|
|
// Check for long comment
|
|
if (s[i] === "[") {
|
|
let j = i + 1;
|
|
let equalsCount = 0;
|
|
while (s[j] === "=") {
|
|
equalsCount++;
|
|
j++;
|
|
}
|
|
if (s[j] === "[") {
|
|
// Found long comment start
|
|
const closeBracket = "]" + "=".repeat(equalsCount) + "]";
|
|
// Replace opening bracket with spaces
|
|
result += " ".repeat(j - i + 1);
|
|
i = j + 1;
|
|
|
|
// Find matching closing bracket
|
|
const content = s.substring(i);
|
|
const closeIndex = content.indexOf(closeBracket);
|
|
if (closeIndex !== -1) {
|
|
// Replace comment content and closing bracket with spaces
|
|
result += " ".repeat(closeIndex) + " ".repeat(closeBracket.length);
|
|
i += closeIndex + closeBracket.length;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Single line comment - replace rest of line with spaces
|
|
while (i < s.length && s[i] !== "\n") {
|
|
result += " ";
|
|
i++;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
result += s[i];
|
|
i++;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
export function parse(s: string, ctx: ASTCtx = {}): LuaBlock {
|
|
try {
|
|
const t = parseToAST(stripLuaComments(s));
|
|
// console.log("Clean tree", JSON.stringify(t, null, 2));
|
|
const result = parseChunk(t, ctx);
|
|
// console.log("Parsed AST", JSON.stringify(result, null, 2));
|
|
getBlockGotoMeta(result);
|
|
return result;
|
|
} catch (e: any) {
|
|
if (e && typeof e === "object" && "astCtx" in e) {
|
|
throw new LuaRuntimeError(
|
|
e.message,
|
|
LuaStackFrame.lostFrame.withCtx(
|
|
(e as any).astCtx as ASTCtx,
|
|
),
|
|
);
|
|
}
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
export function parseToAST(t: string): ParseTree {
|
|
const n = lezerToParseTree(t, parser.parse(t).topNode);
|
|
return cleanTree(n, true);
|
|
}
|
|
|
|
/**
|
|
* Helper function to parse a Lua expression string
|
|
*/
|
|
export function parseExpressionString(
|
|
expr: string,
|
|
): LuaExpression {
|
|
const parsedLua = parse(`_(${expr})`) as LuaBlock;
|
|
return (parsedLua.statements[0] as LuaFunctionCallStatement).call.args[0];
|
|
}
|