848 lines
33 KiB
TypeScript
848 lines
33 KiB
TypeScript
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import { mergeLocs, Token, Tokenizer, TokenType } from "../tokenizer";
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import { SourceLocated, SourceLocation } from "../workertypes";
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import { newDecoder } from "./decoder";
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import { Action, ActionContext, ArrayType, CodeLiteralNode, CodePlaceholderNode, ComponentType, DataField, DataType, DataValue, ECSError, Entity, EntityArchetype, EntityManager, EntityScope, IntType, Query, RefType, SelectType, SELECT_TYPE, SourceFileExport, System, SystemInstance, SystemInstanceParameters, ComponentFieldPair, Expr, ExprBase, ForwardRef, isLiteral, EntityFieldOp, LExpr, Statement, QueryExpr } from "./ecs";
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export enum ECSTokenType {
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Ellipsis = 'ellipsis',
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Operator = 'operator',
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Relational = 'relational',
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QuotedString = 'quoted-string',
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Integer = 'integer',
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CodeFragment = 'code-fragment',
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Placeholder = 'placeholder',
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}
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const OPERATORS = {
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'IMP': {f:'bimp',p:4},
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'EQV': {f:'beqv',p:5},
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'XOR': {f:'bxor',p:6},
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'OR': {f:'bor',p:7}, // or "lor" for logical
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'AND': {f:'band',p:8}, // or "land" for logical
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'||': {f:'lor',p:17}, // not used
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'&&': {f:'land',p:18}, // not used
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'=': {f:'eq',p:50},
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'==': {f:'eq',p:50},
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'<>': {f:'ne',p:50},
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'><': {f:'ne',p:50},
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'!=': {f:'ne',p:50},
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'#': {f:'ne',p:50},
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'<': {f:'lt',p:50},
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'>': {f:'gt',p:50},
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'<=': {f:'le',p:50},
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'>=': {f:'ge',p:50},
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'MIN': {f:'min',p:75},
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'MAX': {f:'max',p:75},
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'+': {f:'add',p:100},
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'-': {f:'sub',p:100},
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};
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function getOperator(op: string) {
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return (OPERATORS as any)[op];
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}
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function getPrecedence(tok: Token): number {
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switch (tok.type) {
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case ECSTokenType.Operator:
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case ECSTokenType.Relational:
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case TokenType.Ident:
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let op = getOperator(tok.str);
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if (op) return op.p;
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}
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return -1;
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}
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// is token an end of statement marker? (":" or end of line)
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function isEOS(tok: Token) {
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return tok.type == TokenType.EOL || tok.type == TokenType.Comment
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|| tok.str == ':' || tok.str == 'ELSE'; // TODO: only ELSE if ifElse==true
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}
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///
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export class ECSCompiler extends Tokenizer {
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currentScope: EntityScope | null = null;
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currentContext: ActionContext | null = null;
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includeDebugInfo = false;
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constructor(
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public readonly em: EntityManager,
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public readonly isMainFile: boolean) {
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super();
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//this.includeEOL = true;
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this.setTokenRules([
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{ type: ECSTokenType.Ellipsis, regex: /\.\./ },
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{ type: ECSTokenType.QuotedString, regex: /".*?"/ },
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{ type: ECSTokenType.CodeFragment, regex: /---.*?---/ },
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{ type: ECSTokenType.Integer, regex: /0[xX][A-Fa-f0-9]+/ },
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{ type: ECSTokenType.Integer, regex: /\$[A-Fa-f0-9]+/ },
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{ type: ECSTokenType.Integer, regex: /[%][01]+/ },
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{ type: ECSTokenType.Integer, regex: /\d+/ },
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{ type: ECSTokenType.Relational, regex: /[=<>][=<>]?/ },
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{ type: ECSTokenType.Operator, regex: /[.#,:(){}\[\]\-\+]/ },
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{ type: TokenType.Ident, regex: /[A-Za-z_][A-Za-z0-9_]*/ },
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{ type: TokenType.Ignore, regex: /\/\/.*?[\n\r]/ },
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{ type: TokenType.Ignore, regex: /\/\*.*?\*\// },
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{ type: TokenType.EOL, regex: /[\n\r]+/ },
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{ type: TokenType.Ignore, regex: /\s+/ },
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]);
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this.errorOnCatchAll = true;
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}
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annotate<T extends SourceLocated>(fn: () => T) {
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let tok = this.peekToken();
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let obj = fn();
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if (obj) (obj as SourceLocated).$loc = tok.$loc;
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return obj;
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}
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parseFile(text: string, path: string) {
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this.tokenizeFile(text, path);
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while (!this.isEOF()) {
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let top = this.parseTopLevel();
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if (top) {
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let t = top;
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this.annotate(() => t); // TODO? typescript bug?
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}
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}
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this.runDeferred();
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}
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getImportFile: (path: string) => string;
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importFile(path: string) {
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if (!this.em.imported[path]) { // already imported?
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let text = this.getImportFile && this.getImportFile(path);
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if (!text) this.compileError(`I can't find the import file "${path}".`);
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this.em.imported[path] = true;
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let comp = new ECSCompiler(this.em, false);
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comp.includeDebugInfo = this.includeDebugInfo; // TODO: clone compiler
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try {
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comp.parseFile(text, path);
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} catch (e) {
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for (var err of comp.errors) this.errors.push(err);
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throw e;
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}
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}
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}
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parseTopLevel() {
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//this.skipBlankLines();
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let tok = this.expectTokens(['component', 'system', 'scope', 'resource', 'import', 'demo', 'comment']);
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if (tok.str == 'component') {
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return this.em.defineComponent(this.parseComponentDefinition());
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}
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if (tok.str == 'system') {
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return this.em.defineSystem(this.parseSystem());
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}
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if (tok.str == 'scope') {
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return this.parseScope();
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}
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if (tok.str == 'resource') {
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return this.em.defineSystem(this.parseResource());
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}
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if (tok.str == 'import') {
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let tok = this.expectTokenTypes([ECSTokenType.QuotedString]);
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let path = tok.str.substring(1, tok.str.length - 1);
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return this.importFile(path);
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}
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if (tok.str == 'demo') {
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if (this.isMainFile) {
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let scope = this.parseScope();
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scope.isDemo = true;
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this.expectToken('demo');
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return scope;
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} else {
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this.skipDemo(); // don't even parse it, just skip it
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return;
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}
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}
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if (tok.str == 'comment') {
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this.expectTokenTypes([ECSTokenType.CodeFragment]);
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return;
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}
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this.compileError(`Unexpected top-level keyword: ${tok.str}`);
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}
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skipDemo() {
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var tok;
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while ((tok = this.consumeToken()) && !this.isEOF()) {
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if (tok.str == 'end' && this.peekToken().str == 'demo') {
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this.consumeToken();
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return;
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}
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}
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throw new ECSError(`Expected "end demo" after a "demo" declaration.`);
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}
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parseComponentDefinition(): ComponentType {
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let name = this.expectIdent().str;
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let fields = [];
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this.em.deferComponent(name);
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while (this.peekToken().str != 'end') {
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fields.push(this.parseComponentField());
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}
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this.expectToken('end');
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return { name, fields };
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}
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parseComponentField(): DataField {
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let name = this.expectIdent();
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this.expectToken(':', 'I expected either a ":" or "end" here.'); // TODO
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let type = this.parseDataType();
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return { name: name.str, $loc: name.$loc, ...type };
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}
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parseDataType(): DataType {
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if (this.peekToken().type == 'integer') {
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let lo = this.parseIntegerConstant();
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this.expectToken('..');
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let hi = this.parseIntegerConstant();
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this.checkLowerLimit(lo, -0x80000000, "lower int range");
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this.checkUpperLimit(hi, 0x7fffffff, "upper int range");
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this.checkUpperLimit(hi-lo, 0xffffffff, "int range");
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this.checkLowerLimit(hi, lo, "int range");
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// TODO: use default value?
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let defvalue;
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if (this.ifToken('default')) {
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defvalue = this.parseIntegerConstant();
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}
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// TODO: check types
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return { dtype: 'int', lo, hi, defvalue } as IntType;
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}
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if (this.peekToken().str == '[') {
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return { dtype: 'ref', query: this.parseQuery() } as RefType;
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}
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if (this.ifToken('array')) {
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let index: IntType | undefined = undefined;
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if (this.peekToken().type == ECSTokenType.Integer) {
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index = this.parseDataType() as IntType;
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}
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this.expectToken('of');
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let elem = this.parseDataType();
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let baseoffset;
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if (this.ifToken('baseoffset')) {
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baseoffset = this.parseIntegerConstant();
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this.checkLowerLimit(baseoffset, -32768, "base offset");
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this.checkUpperLimit(baseoffset, 32767, "base offset");
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}
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return { dtype: 'array', index, elem, baseoffset } as ArrayType;
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}
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if (this.ifToken('enum')) {
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this.expectToken('[');
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let enumtoks = this.parseList(this.parseEnumIdent, ',');
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this.expectToken(']');
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if (enumtoks.length == 0) this.compileError(`must define at least one enum`);
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let lo = 0;
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let hi = enumtoks.length-1;
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this.checkLowerLimit(hi, 0, "enum count");
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this.checkUpperLimit(hi, 255, "enum count");
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let enums : {[name:string]:number} = {};
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for (let i=0; i<=hi; i++)
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enums[enumtoks[i].str] = i;
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// TODO: use default value?
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let defvalue;
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if (this.ifToken('default')) {
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defvalue = this.parseIntegerConstant();
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}
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return { dtype: 'int', lo, hi, defvalue, enums } as IntType;
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}
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throw this.compileError(`I expected a data type here.`);
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}
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parseEnumIdent() {
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let tok = this.expectTokenTypes([TokenType.Ident]);
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return tok;
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}
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parseEnumValue(tok: Token, field: IntType) {
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if (!field.enums) throw new ECSError(`field is not an enum`);
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let value = field.enums[tok.str];
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if (value == null) throw new ECSError(`unknown enum "${tok.str}"`);
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return value;
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}
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parseDataValue(field: DataField): DataValue | ForwardRef {
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let tok = this.peekToken();
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// TODO: move to expr
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if (tok.type == TokenType.Ident && field.dtype == 'int') {
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return this.parseEnumValue(this.consumeToken(), field);
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}
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if (tok.type == TokenType.Ident) {
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let entity = this.currentScope?.getEntityByName(tok.str);
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if (!entity)
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this.compileError('no entity named "${tok.str}"');
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else {
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this.consumeToken();
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this.expectToken('.');
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let fieldName = this.expectIdent().str;
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let constValue = this.currentScope?.getConstValue(entity, fieldName);
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if (constValue == null)
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throw new ECSError(`"${fieldName}" is not defined as a constant`, entity);
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else
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return constValue;
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}
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}
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if (tok.str == '[') {
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// TODO: 16-bit?
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return new Uint8Array(this.parseDataArray());
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}
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if (tok.str == '#') {
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this.consumeToken();
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let reftype = field.dtype == 'ref' ? field as RefType : undefined;
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return this.parseEntityForwardRef(reftype);
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}
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// TODO?
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return this.parseIntegerConstant();
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// TODO: throw this.compileError(`I expected a ${field.dtype} here.`);
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}
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parseEntityForwardRef(reftype?: RefType): ForwardRef {
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let token = this.expectIdent();
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return { reftype, token };
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}
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parseDataArray() {
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this.expectToken('[');
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let arr = this.parseList(this.parseIntegerConstant, ',');
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this.expectToken(']');
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return arr;
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}
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expectInteger(): number {
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let s = this.consumeToken().str;
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let i: number;
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if (s.startsWith('$'))
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i = parseInt(s.substring(1), 16); // hex $...
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else if (s.startsWith('%'))
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i = parseInt(s.substring(1), 2); // binary %...
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else
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i = parseInt(s); // default base 10 or 16 (0x...)
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if (isNaN(i)) this.compileError('There should be an integer here.');
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return i;
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}
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parseSystem(): System {
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let name = this.expectIdent().str;
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let actions: Action[] = [];
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let system: System = { name, actions };
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let cmd;
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while ((cmd = this.expectTokens(['on', 'locals', 'end']).str) != 'end') {
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if (cmd == 'on') {
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let action = this.annotate(() => this.parseAction(system));
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actions.push(action);
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} else if (cmd == 'locals') {
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system.tempbytes = this.parseIntegerConstant();
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} else {
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this.compileError(`Unexpected system keyword: ${cmd}`);
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}
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}
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return system;
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}
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parseResource(): System {
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let name = this.expectIdent().str;
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let tempbytes;
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if (this.peekToken().str == 'locals') {
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this.consumeToken();
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tempbytes = this.parseIntegerConstant();
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}
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let system: System = { name, tempbytes, actions: [] };
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let expr = this.parseBlockStatement();
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let action: Action = { expr, event: name };
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system.actions.push(action);
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return system;
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}
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parseAction(system: System): Action {
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// TODO: unused events?
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const event = this.expectIdent().str;
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this.expectToken('do');
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let fitbytes = undefined;
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let critical = undefined;
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if (this.ifToken('critical')) critical = true;
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if (this.ifToken('fit')) fitbytes = this.parseIntegerConstant();
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let expr = this.parseBlockStatement();
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//query, join, select, direction,
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let action : Action = { expr, event, fitbytes, critical };
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return action as Action;
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}
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parseQuery() {
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let q: Query = { include: [] };
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let start = this.expectToken('[');
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this.parseList(() => this.parseQueryItem(q), ',');
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this.expectToken(']');
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// TODO: other params
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q.$loc = mergeLocs(start.$loc, this.lasttoken.$loc);
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return q;
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}
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parseQueryItem(q: Query) {
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let prefix = this.peekToken();
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if (prefix.type != TokenType.Ident) {
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this.consumeToken();
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}
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if (prefix.type == TokenType.Ident) {
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let cref = this.parseComponentRef();
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q.include.push(cref);
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} else if (prefix.str == '-') {
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let cref = this.parseComponentRef();
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if (!q.exclude) q.exclude = [];
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q.exclude.push(cref);
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} else if (prefix.str == '#') {
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const scope = this.currentScope;
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if (scope == null) {
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throw this.compileError('You can only reference specific entities inside of a scope.');
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}
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let eref = this.parseEntityForwardRef();
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this.deferred.push(() => {
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let refvalue = this.resolveEntityRef(scope, eref);
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if (!q.entities) q.entities = [];
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q.entities.push(scope.entities[refvalue]);
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});
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} else {
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this.compileError(`Query components may be preceded only by a '-'.`);
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}
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}
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parseEventName() {
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return this.expectIdent().str;
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}
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parseEventList() {
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return this.parseList(this.parseEventName, ",");
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}
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parseCode(): string { // TODOActionNode[] {
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// TODO: add $loc
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let tok = this.expectTokenTypes([ECSTokenType.CodeFragment]);
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let code = tok.str.substring(3, tok.str.length - 3);
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// TODO: add after parsing maybe?
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let lines = code.split('\n');
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if (this.includeDebugInfo) this.addDebugInfo(lines, tok.$loc.line);
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code = lines.join('\n');
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//let acomp = new ECSActionCompiler(context);
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//let nodes = acomp.parseFile(code, this.path);
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// TODO: return nodes
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return code;
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}
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addDebugInfo(lines: string[], startline: number) {
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const re = /^\s*(;|\/\/|$)/; // ignore comments and blank lines
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for (let i = 0; i < lines.length; i++) {
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if (!lines[i].match(re))
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lines[i] = this.em.dialect.debug_line(this.path, startline + i) + '\n' + lines[i];
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}
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}
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parseScope(): EntityScope {
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let name = this.expectIdent().str;
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let scope = this.em.newScope(name, this.currentScope || undefined);
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scope.filePath = this.path;
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this.currentScope = scope;
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let cmd;
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while ((cmd = this.expectTokens(['end', 'using', 'entity', 'scope', 'comment', 'system']).str) != 'end') {
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if (cmd == 'using') {
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this.parseScopeUsing();
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}
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if (cmd == 'entity') {
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this.annotate(() => this.parseEntity());
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}
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if (cmd == 'scope') {
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this.annotate(() => this.parseScope());
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}
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if (cmd == 'comment') {
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this.expectTokenTypes([ECSTokenType.CodeFragment]);
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}
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// TODO: need to make these local names, otherwise we get "duplicate name"
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if (cmd == 'system') {
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let sys = this.annotate(() => this.parseSystem());
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this.em.defineSystem(sys);
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this.currentScope.newSystemInstanceWithDefaults(sys);
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}
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}
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this.currentScope = scope.parent || null;
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return scope;
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}
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parseScopeUsing() {
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let instlist = this.parseList(this.parseSystemInstanceRef, ',');
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let params = {};
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if (this.peekToken().str == 'with') {
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this.consumeToken();
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params = this.parseSystemInstanceParameters();
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}
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for (let inst of instlist) {
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inst.params = params;
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this.currentScope?.newSystemInstance(inst);
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}
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}
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parseEntity(): Entity {
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if (!this.currentScope) { throw this.internalError(); }
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const scope = this.currentScope;
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let entname = '';
|
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if (this.peekToken().type == TokenType.Ident) {
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entname = this.expectIdent().str;
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}
|
|
let etype = this.parseEntityArchetype();
|
|
let entity = this.currentScope.newEntity(etype, entname);
|
|
let cmd2: string;
|
|
// TODO: remove init?
|
|
while ((cmd2 = this.expectTokens(['const', 'init', 'var', 'decode', 'end']).str) != 'end') {
|
|
let cmd = cmd2; // put in scope
|
|
if (cmd == 'var') cmd = 'init'; // TODO: remove?
|
|
if (cmd == 'init' || cmd == 'const') {
|
|
this.parseInitConst(cmd, scope, entity);
|
|
} else if (cmd == 'decode') {
|
|
this.parseDecode(scope, entity);
|
|
}
|
|
}
|
|
return entity;
|
|
}
|
|
|
|
parseInitConst(cmd: string, scope: EntityScope, entity: Entity) {
|
|
// TODO: check data types
|
|
let name = this.expectIdent().str;
|
|
let { c, f } = this.getEntityField(entity, name);
|
|
let symtype = scope.isConstOrInit(c, name);
|
|
if (symtype && symtype != cmd)
|
|
this.compileError(`I can't mix const and init values for a given field in a scope.`);
|
|
this.expectToken('=');
|
|
let valueOrRef = this.parseDataValue(f);
|
|
if ((valueOrRef as ForwardRef).token != null) {
|
|
this.deferred.push(() => {
|
|
this.lasttoken = (valueOrRef as ForwardRef).token; // for errors
|
|
let refvalue = this.resolveEntityRef(scope, valueOrRef as ForwardRef);
|
|
if (cmd == 'const') scope.setConstValue(entity, c, f, refvalue);
|
|
if (cmd == 'init') scope.setInitValue(entity, c, f, refvalue);
|
|
});
|
|
} else {
|
|
if (cmd == 'const') scope.setConstValue(entity, c, f, valueOrRef as DataValue);
|
|
if (cmd == 'init') scope.setInitValue(entity, c, f, valueOrRef as DataValue);
|
|
}
|
|
}
|
|
|
|
parseDecode(scope: EntityScope, entity: Entity) {
|
|
let decoderid = this.expectIdent().str;
|
|
let codetok = this.expectTokenTypes([ECSTokenType.CodeFragment]);
|
|
let code = codetok.str;
|
|
code = code.substring(3, code.length - 3);
|
|
let decoder = newDecoder(decoderid, code);
|
|
if (!decoder) { throw this.compileError(`I can't find a "${decoderid}" decoder.`); }
|
|
let result;
|
|
try {
|
|
result = decoder.parse();
|
|
} catch (e) {
|
|
throw new ECSError(e.message, decoder.getErrorLocation(codetok.$loc));
|
|
}
|
|
for (let entry of Object.entries(result.properties)) {
|
|
let { c, f } = this.getEntityField(entity, entry[0]);
|
|
scope.setConstValue(entity, c, f, entry[1] as DataValue);
|
|
}
|
|
}
|
|
|
|
getEntityField(e: Entity, name: string): ComponentFieldPair {
|
|
if (!this.currentScope) { throw this.internalError(); }
|
|
let comps = this.em.componentsWithFieldName([e.etype], name);
|
|
if (comps.length == 0) this.compileError(`I couldn't find a field named "${name}" for this entity.`)
|
|
if (comps.length > 1) this.compileError(`I found more than one field named "${name}" for this entity.`)
|
|
let component = comps[0];
|
|
let field = component.fields.find(f => f.name == name);
|
|
if (!field) { throw this.internalError(); }
|
|
return { c: component, f: field };
|
|
}
|
|
|
|
parseEntityArchetype(): EntityArchetype {
|
|
this.expectToken('[');
|
|
let components = this.parseList(this.parseComponentRef, ',');
|
|
this.expectToken(']');
|
|
return { components };
|
|
}
|
|
|
|
parseComponentRef(): ComponentType {
|
|
let name = this.expectIdent().str;
|
|
let cref = this.em.getComponentByName(name);
|
|
if (!cref) this.compileError(`I couldn't find a component named "${name}".`)
|
|
return cref;
|
|
}
|
|
|
|
findEntityByName(scope: EntityScope, token: Token) {
|
|
let name = token.str;
|
|
let eref = scope.entities.find(e => e.name == name);
|
|
if (!eref) {
|
|
throw this.compileError(`I couldn't find an entity named "${name}" in this scope.`, token.$loc)
|
|
}
|
|
return eref;
|
|
}
|
|
|
|
resolveEntityRef(scope: EntityScope, ref: ForwardRef): number {
|
|
let id = this.findEntityByName(scope, ref.token).id;
|
|
if (ref.reftype) {
|
|
// TODO: make this a function? elo ehi etc?
|
|
let atypes = this.em.archetypesMatching(ref.reftype.query);
|
|
let entities = scope.entitiesMatching(atypes);
|
|
if (entities.length == 0)
|
|
throw this.compileError(`This entity doesn't seem to fit the reference type.`, ref.token.$loc);
|
|
id -= entities[0].id;
|
|
}
|
|
return id;
|
|
}
|
|
|
|
parseSystemInstanceRef(): SystemInstance {
|
|
let name = this.expectIdent().str;
|
|
let system = this.em.getSystemByName(name);
|
|
if (!system) throw this.compileError(`I couldn't find a system named "${name}".`, this.lasttoken.$loc);
|
|
let params = {};
|
|
let inst = { system, params, id: 0 };
|
|
return inst;
|
|
}
|
|
|
|
parseSystemInstanceParameters(): SystemInstanceParameters {
|
|
let scope = this.currentScope;
|
|
if (scope == null) throw this.internalError();
|
|
if (this.peekToken().str == '[') {
|
|
return { query: this.parseQuery() };
|
|
}
|
|
this.expectToken('#');
|
|
let entname = this.expectIdent();
|
|
this.expectToken('.');
|
|
let fieldname = this.expectIdent();
|
|
let entity = this.findEntityByName(scope, entname);
|
|
let cf = this.getEntityField(entity, fieldname.str);
|
|
return { refEntity: entity, refField: cf };
|
|
}
|
|
|
|
exportToFile(src: SourceFileExport) {
|
|
this.em.exportToFile(src);
|
|
}
|
|
|
|
export() {
|
|
let src = new SourceFileExport();
|
|
src.line(this.em.dialect.debug_file(this.path));
|
|
for (let path of Object.keys(this.em.imported))
|
|
src.line(this.em.dialect.debug_file(path));
|
|
this.exportToFile(src);
|
|
return src.toString();
|
|
}
|
|
|
|
checkUpperLimit(value: number, upper: number, what: string) {
|
|
if (value > upper) this.compileError(`This ${what} is too high; must be ${upper} or less`);
|
|
}
|
|
checkLowerLimit(value: number, lower: number, what: string) {
|
|
if (value < lower) this.compileError(`This ${what} is too low; must be ${lower} or more`);
|
|
}
|
|
|
|
// expression stuff
|
|
|
|
parseConstant(): DataValue {
|
|
let expr = this.parseExpr();
|
|
expr = this.em.evalExpr(expr, this.currentScope);
|
|
if (isLiteral(expr)) return expr.value;
|
|
throw this.compileError('This expression is not a constant.');
|
|
}
|
|
parseIntegerConstant(): number {
|
|
let value = this.parseConstant();
|
|
if (typeof value === 'number') return value;
|
|
throw this.compileError('This expression is not an integer.');
|
|
}
|
|
parseExpr(): Expr {
|
|
var startloc = this.peekToken().$loc;
|
|
var expr = this.parseExpr1(this.parsePrimary(), 0);
|
|
var endloc = this.lasttoken.$loc;
|
|
expr.$loc = mergeLocs(startloc, endloc);
|
|
return expr;
|
|
}
|
|
parseExpr1(left: Expr, minPred: number): Expr {
|
|
let look = this.peekToken();
|
|
while (getPrecedence(look) >= minPred) {
|
|
let op = this.consumeToken();
|
|
let right: Expr = this.parsePrimary();
|
|
look = this.peekToken();
|
|
while (getPrecedence(look) > getPrecedence(op)) {
|
|
right = this.parseExpr1(right, getPrecedence(look));
|
|
look = this.peekToken();
|
|
}
|
|
var opfn = getOperator(op.str).f;
|
|
// use logical operators instead of bitwise?
|
|
if (op.str == 'and') opfn = 'land';
|
|
if (op.str == 'or') opfn = 'lor';
|
|
var valtype = this.exprTypeForOp(opfn, left, right, op);
|
|
left = { valtype:valtype, op:opfn, left: left, right: right };
|
|
}
|
|
return left;
|
|
}
|
|
parsePrimary(): Expr {
|
|
let tok = this.consumeToken();
|
|
switch (tok.type) {
|
|
case ECSTokenType.Integer:
|
|
this.pushbackToken(tok);
|
|
let value = this.expectInteger();
|
|
let valtype : IntType = { dtype: 'int', lo: value, hi: value };
|
|
return { valtype, value };
|
|
case TokenType.Ident:
|
|
if (tok.str == 'not') {
|
|
let expr = this.parsePrimary();
|
|
let valtype : IntType = { dtype: 'int', lo: 0, hi: 1 };
|
|
return { valtype, op: 'lnot', expr: expr };
|
|
} else {
|
|
this.pushbackToken(tok);
|
|
return this.parseVarSubscriptOrFunc();
|
|
}
|
|
case ECSTokenType.Operator:
|
|
if (tok.str == '(') {
|
|
let expr = this.parseExpr();
|
|
this.expectToken(')', `There should be another expression or a ")" here.`);
|
|
return expr;
|
|
} else if (tok.str == '-') {
|
|
let expr = this.parsePrimary(); // TODO: -2^2=-4 and -2-2=-4
|
|
let valtype = (expr as ExprBase).valtype;
|
|
if (valtype?.dtype == 'int') {
|
|
let hi = Math.abs(valtype.hi);
|
|
let negtype : IntType = { dtype: 'int', lo: -hi, hi: hi };
|
|
return { valtype: negtype, op: 'neg', expr: expr };
|
|
}
|
|
} else if (tok.str == '+') {
|
|
return this.parsePrimary(); // ignore unary +
|
|
}
|
|
default:
|
|
throw this.compileError(`The expression is incomplete.`);
|
|
}
|
|
}
|
|
parseVarSubscriptOrFunc(): LExpr {
|
|
var tok = this.consumeToken();
|
|
switch (tok.type) {
|
|
case TokenType.Ident:
|
|
// component:field
|
|
if (this.ifToken(':')) {
|
|
let ftok = this.consumeToken();
|
|
let component = this.em.getComponentByName(tok.str);
|
|
if (!component) throw this.compileError(`A component named "${tok.str}" has not been defined.`);
|
|
let field = component.fields.find(f => f.name == ftok.str);
|
|
if (!field) throw this.compileError(`There is no "${ftok.str}" field in the ${tok.str} component.`);
|
|
if (!this.currentScope) throw this.compileError(`This operation only works inside of a scope.`);
|
|
let atypes = this.em.archetypesMatching({ include: [component] })
|
|
let entities = this.currentScope.entitiesMatching(atypes);
|
|
return { entities, field } as EntityFieldOp;
|
|
}
|
|
// entity.field
|
|
if (this.ifToken('.')) {
|
|
let ftok = this.consumeToken();
|
|
if (!this.currentScope) throw this.compileError(`This operation only works inside of a scope.`);
|
|
let entity = this.currentScope.getEntityByName(tok.str);
|
|
if (!entity) throw this.compileError(`An entity named "${tok.str}" has not been defined.`);
|
|
let component = this.em.singleComponentWithFieldName([entity.etype], ftok.str, ftok);
|
|
let field = component.fields.find(f => f.name == ftok.str);
|
|
if (!field) throw this.compileError(`There is no "${ftok.str}" field in this entity.`);
|
|
let entities = [entity];
|
|
return { entities, field } as EntityFieldOp;
|
|
}
|
|
let args : Expr[] = [];
|
|
if (this.ifToken('(')) {
|
|
args = this.parseExprList();
|
|
this.expectToken(')', `There should be another expression or a ")" here.`);
|
|
}
|
|
var loc = mergeLocs(tok.$loc, this.lasttoken.$loc);
|
|
var valtype = this.exprTypeForSubscript(tok.str, args, loc);
|
|
return { valtype: valtype, name: tok.str, args: args, $loc:loc };
|
|
default:
|
|
throw this.compileError(`There should be a variable name here.`);
|
|
}
|
|
}
|
|
parseLexpr(): LExpr {
|
|
var lexpr = this.parseVarSubscriptOrFunc();
|
|
//this.vardefs[lexpr.name] = lexpr;
|
|
//this.validateVarName(lexpr);
|
|
return lexpr;
|
|
}
|
|
exprTypeForOp(fnname: string, left: Expr, right: Expr, optok: Token) : DataType {
|
|
return { dtype: 'int', lo:0, hi:255 }; // TODO?
|
|
}
|
|
exprTypeForSubscript(fnname: string, args: Expr[], loc: SourceLocation) : DataType {
|
|
return { dtype: 'int', lo:0, hi:255 }; // TODO?
|
|
}
|
|
parseLexprList(): LExpr[] {
|
|
return this.parseList(this.parseLexpr, ',');
|
|
}
|
|
parseExprList(): Expr[] {
|
|
return this.parseList(this.parseExpr, ',');
|
|
}
|
|
parseBlockStatement(): Statement {
|
|
let valtype : IntType = { dtype:'int', lo:0, hi: 0 } // TODO?
|
|
if (this.peekToken().type == ECSTokenType.CodeFragment) {
|
|
return { valtype, code: this.parseCode() };
|
|
}
|
|
if (this.ifToken('begin')) {
|
|
let stmts = [];
|
|
while (this.peekToken().str != 'end') {
|
|
stmts.push(this.parseBlockStatement());
|
|
}
|
|
this.expectToken('end');
|
|
return { valtype, stmts };
|
|
}
|
|
let cmd = this.peekToken();
|
|
if (SELECT_TYPE.includes(cmd.str as any)) {
|
|
return this.parseQueryStatement();
|
|
}
|
|
throw this.compileError(`There should be a statement or "end" here.`, cmd.$loc);
|
|
}
|
|
parseQueryStatement() : QueryExpr {
|
|
// TODO: include modifiers in error msg
|
|
const select = this.expectTokens(SELECT_TYPE).str as SelectType; // TODO: type check?
|
|
let query = undefined;
|
|
let join = undefined;
|
|
if (select == 'once') {
|
|
if (this.peekToken().str == '[') this.compileError(`A "${select}" action can't include a query.`)
|
|
} else {
|
|
query = this.parseQuery();
|
|
}
|
|
if (select == 'join') {
|
|
this.expectToken('with');
|
|
join = this.parseQuery();
|
|
}
|
|
if (this.ifToken('limit')) {
|
|
if (!query) { this.compileError(`A "${select}" query can't include a limit.`); }
|
|
else query.limit = this.parseIntegerConstant();
|
|
}
|
|
const all_modifiers = ['asc', 'desc']; // TODO
|
|
const modifiers = this.parseModifiers(all_modifiers);
|
|
let direction = undefined;
|
|
if (modifiers['asc']) direction = 'asc';
|
|
else if (modifiers['desc']) direction = 'desc';
|
|
let body = this.parseBlockStatement();
|
|
return { select, query, join, direction, stmts: [body], loop: select == 'foreach' } as QueryExpr;
|
|
}
|
|
}
|
|
|
|
///
|
|
|
|
export class ECSActionCompiler extends Tokenizer {
|
|
constructor(
|
|
public readonly context: ActionContext) {
|
|
super();
|
|
this.setTokenRules([
|
|
{ type: ECSTokenType.Placeholder, regex: /\{\{.*?\}\}/ },
|
|
{ type: TokenType.CatchAll, regex: /[^{\n]+\n*/ },
|
|
]);
|
|
this.errorOnCatchAll = false;
|
|
}
|
|
|
|
parseFile(text: string, path: string) {
|
|
this.tokenizeFile(text, path);
|
|
let nodes = [];
|
|
while (!this.isEOF()) {
|
|
let tok = this.consumeToken();
|
|
if (tok.type == ECSTokenType.Placeholder) {
|
|
let args = tok.str.substring(2, tok.str.length - 2).split(/\s+/);
|
|
nodes.push(new CodePlaceholderNode(this.context, tok.$loc, args));
|
|
} else if (tok.type == TokenType.CatchAll) {
|
|
nodes.push(new CodeLiteralNode(this.context, tok.$loc, tok.str));
|
|
}
|
|
}
|
|
return nodes;
|
|
}
|
|
}
|