278 lines
9.5 KiB
TypeScript
278 lines
9.5 KiB
TypeScript
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import { Tokenizer, TokenType } from "../tokenizer";
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import { Action, ArrayType, ComponentType, DataField, DataType, DataValue, Dialect_CA65, Entity, EntityArchetype, EntityManager, EntityScope, IntType, Query, RefType, SelectType, SourceFileExport, System } from "./ecs";
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export enum ECSTokenType {
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Ellipsis = 'ellipsis',
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Operator = 'delimiter',
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QuotedString = 'quoted-string',
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Integer = 'integer',
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}
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export class ECSCompiler extends Tokenizer {
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em = new EntityManager(new Dialect_CA65()); // TODO
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currentScope: EntityScope | null = null;
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constructor() {
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super();
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//this.includeEOL = true;
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this.setTokenRules([
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{ type: TokenType.Ident, regex: /[A-Za-z_][A-Za-z0-9_]*/ },
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{ type: TokenType.CodeFragment, regex: /---/ },
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{ type: ECSTokenType.Ellipsis, regex: /\.\./ },
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{ type: ECSTokenType.Operator, regex: /[#=,:(){}\[\]]/ },
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{ type: ECSTokenType.QuotedString, regex: /".*?"/ },
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{ type: ECSTokenType.Integer, regex: /[-]?0x[A-Fa-f0-9]+/ },
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{ type: ECSTokenType.Integer, regex: /[-]?\$[A-Fa-f0-9]+/ },
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{ type: ECSTokenType.Integer, regex: /[-]?\d+/ },
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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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parseFile(text: string, path: string) {
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this.tokenizeFile(text, path);
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while (!this.isEOF()) {
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this.parseTopLevel();
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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', '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 == 'comment') {
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this.expectTokenTypes([TokenType.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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parseComponentDefinition(): ComponentType {
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let name = this.expectIdent().str;
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let fields = [];
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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, ...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.expectInteger();
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this.expectToken('..');
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let hi = this.expectInteger();
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return { dtype: 'int', lo, hi } 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.peekToken().str == 'array') {
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this.expectToken('array');
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this.expectToken('of');
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return { dtype: 'array', elem: this.parseDataType() } as ArrayType;
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}
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this.compileError(`Unknown data type`); // TODO
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}
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parseDataValue(field: DataField) : DataValue {
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let tok = this.peekToken();
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if (tok.type == 'integer') {
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return this.expectInteger();
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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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let reftype = field.dtype == 'ref' ? field as RefType : undefined;
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let e = this.parseEntityRef();
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let id = e.id;
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if (reftype) {
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// TODO: make this a function? elo ehi etc?
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let atypes = this.em.archetypesMatching(reftype.query);
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let entities = this.currentScope.entitiesMatching(atypes);
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if (entities.length == 0) this.compileError(`This entitiy doesn't seem to fit the reference type.`);
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id -= entities[0].id;
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}
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return id;
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}
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this.compileError(`Unknown data value`); // TODO
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}
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parseDataArray() {
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this.expectToken('[');
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let arr = this.parseList(this.expectInteger, ',');
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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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if (s.startsWith('$')) s = '0x' + s.substring(1);
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let i = parseInt(s);
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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.consumeToken().str) != 'end') {
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if (cmd == 'on') {
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actions.push(this.parseAction());
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} else if (cmd == 'locals') {
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system.tempbytes = this.expectInteger();
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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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parseAction(): Action {
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let event = this.expectIdent().str;
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this.expectToken('do');
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let select = this.expectTokens(['once', 'foreach', 'source']).str as SelectType; // TODO: type check?
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let query = this.parseQuery();
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let emits;
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if (this.peekToken().str == 'emit') {
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this.consumeToken();
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this.expectToken('(');
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emits = this.parseEventList();
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this.expectToken(')');
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}
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let text = this.parseCode();
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return { text, event, query, select };
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}
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parseQuery() {
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let q: Query = { include: [] };
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this.expectToken('[');
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q.include = this.parseList(this.parseComponentRef, ',').map(c => c.name);
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// TODO: other params
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this.expectToken(']');
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return q;
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}
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parseEvent() {
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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.parseEvent, ",");
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}
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parseCode(): string {
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// TODO: add $loc
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let tok = this.expectTokenTypes([TokenType.CodeFragment]);
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let code = tok.str;
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let lines = code.split('\n');
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for (let i=0; i<lines.length; i++) {
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lines[i] = ` .dbg line, "${this.path}", ${tok.$loc.line+i}\n` + lines[i];
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}
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return lines.join('\n');
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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);
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this.currentScope = scope;
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let cmd;
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while ((cmd = this.consumeToken().str) != 'end') {
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if (cmd == 'entity') {
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this.parseEntity();
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} else {
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this.compileError(`Unexpected scope keyword: ${cmd}`);
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}
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}
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this.currentScope = scope.parent;
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return scope;
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}
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parseEntity() : Entity {
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let name = '';
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if (this.peekToken().type == TokenType.Ident) {
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name = this.expectIdent().str;
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}
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let etype = this.parseEntityArchetype();
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let e = this.currentScope.newEntity(etype);
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e.name = name;
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let cmd;
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while ((cmd = this.consumeToken().str) != 'end') {
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// TODO: check data types
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if (cmd == 'const' || cmd == 'init') {
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let name = this.expectIdent().str;
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this.expectToken('=');
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let comps = this.em.componentsWithFieldName([{etype: e.etype, cmatch:e.etype.components}], name);
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if (comps.length == 0) this.compileError(`I couldn't find a field named "${name}" for this entity.`)
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if (comps.length > 1) this.compileError(`I found more than one field named "${name}" for this entity.`)
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let field = comps[0].fields.find(f => f.name == name);
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if (!field) this.internalError();
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let value = this.parseDataValue(field);
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if (cmd == 'const') this.currentScope.setConstValue(e, comps[0], name, value);
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if (cmd == 'init') this.currentScope.setInitValue(e, comps[0], name, value);
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} else {
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this.compileError(`Unexpected scope keyword: ${cmd}`);
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}
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}
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return e;
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}
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parseEntityArchetype() : EntityArchetype {
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this.expectToken('[');
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let components = this.parseList(this.parseComponentRef, ',');
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this.expectToken(']');
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return {components};
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}
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parseComponentRef() : ComponentType {
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let name = this.expectIdent().str;
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let cref = this.em.getComponentByName(name);
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if (!cref) this.compileError(`I couldn't find a component named "${name}".`)
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return cref;
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}
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parseEntityRef(reftype?: RefType) : Entity {
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this.expectToken('#');
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let name = this.expectIdent().str;
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let eref = this.currentScope.entities.find(e => e.name == name);
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if (!eref) this.compileError(`I couldn't find an entity named "${name}" in this scope.`)
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return eref;
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}
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exportToFile(src: SourceFileExport) {
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for (let scope of Object.values(this.em.scopes)) {
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scope.analyzeEntities();
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scope.generateCode();
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scope.dump(src);
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}
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}
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export() {
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let src = new SourceFileExport();
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src.debug_file(this.path);
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this.exportToFile(src);
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return src.toString();
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}
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}
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