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https://github.com/sehugg/8bitworkshop.git
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ecs: started on expressions
This commit is contained in:
Steven Hugg
parent
a965bc83d1
commit
05965397fd
@ -2,22 +2,65 @@
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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, ActionNode, ActionWithJoin, ArrayType, CodeLiteralNode, CodePlaceholderNode, ComponentType, DataField, DataType, DataValue, ECSError, Entity, EntityArchetype, EntityManager, EntityScope, IntType, Query, RefType, SelectType, SELECT_TYPE, SourceFileExport, System, SystemInstance, SystemInstanceParameters, ComponentFieldPair } from "./ecs";
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import { Action, ActionContext, ActionNode, ActionWithJoin, 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, EntitySetField, LExpr } 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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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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interface ForwardRef {
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reftype: RefType | undefined
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token: Token
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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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@ -33,11 +76,12 @@ export class ECSCompiler extends Tokenizer {
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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: /[-]?\d+/ },
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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.Operator, regex: /[.#=,:(){}\[\]\-]/ },
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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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@ -153,9 +197,9 @@ export class ECSCompiler extends Tokenizer {
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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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let lo = this.parseIntegerConstant();
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this.expectToken('..');
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let hi = this.expectInteger();
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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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@ -163,7 +207,7 @@ export class ECSCompiler extends Tokenizer {
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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.expectInteger();
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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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@ -180,7 +224,7 @@ export class ECSCompiler extends Tokenizer {
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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.expectInteger();
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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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@ -201,11 +245,11 @@ export class ECSCompiler extends Tokenizer {
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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.expectInteger();
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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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this.compileError(`I expected a data type here.`); throw new Error();
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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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@ -221,9 +265,7 @@ export class ECSCompiler extends Tokenizer {
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parseDataValue(field: DataField): DataValue | ForwardRef {
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let tok = this.peekToken();
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if (tok.type == ECSTokenType.Integer) {
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return this.expectInteger();
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}
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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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@ -251,7 +293,9 @@ export class ECSCompiler extends Tokenizer {
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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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this.compileError(`I expected a ${field.dtype} here.`); throw new Error();
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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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@ -261,7 +305,7 @@ export class ECSCompiler extends Tokenizer {
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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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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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@ -289,7 +333,7 @@ export class ECSCompiler extends Tokenizer {
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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.expectInteger();
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system.tempbytes = this.parseIntegerConstant();
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} else {
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this.compileError(`Unexpected system keyword: ${cmd}`);
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}
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@ -302,7 +346,7 @@ export class ECSCompiler extends Tokenizer {
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let tempbytes;
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if (this.peekToken().str == 'locals') {
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this.consumeToken();
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tempbytes = this.expectInteger();
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tempbytes = this.parseIntegerConstant();
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}
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let system: System = { name, tempbytes, actions: [] };
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let context: ActionContext = { scope: null, system };
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@ -333,12 +377,12 @@ export class ECSCompiler extends Tokenizer {
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}
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if (this.ifToken('limit')) {
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if (!query) { this.compileError(`A "${select}" query can't include a limit.`); }
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else query.limit = this.expectInteger();
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else query.limit = this.parseIntegerConstant();
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}
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const modifiers = this.parseModifiers(all_modifiers);
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let fitbytes = undefined;
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if (this.ifToken('fit')) {
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fitbytes = this.expectInteger();
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fitbytes = this.parseIntegerConstant();
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}
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let context: ActionContext = { scope: null, system };
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// parse --- code ---
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@ -376,8 +420,7 @@ export class ECSCompiler extends Tokenizer {
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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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this.compileError('You can only reference specific entities inside of a scope.');
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throw new Error();
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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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@ -465,7 +508,7 @@ export class ECSCompiler extends Tokenizer {
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}
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parseEntity(): Entity {
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if (!this.currentScope) { this.internalError(); throw new Error(); }
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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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@ -515,7 +558,7 @@ export class ECSCompiler extends Tokenizer {
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let code = codetok.str;
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code = code.substring(3, code.length - 3);
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let decoder = newDecoder(decoderid, code);
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if (!decoder) { this.compileError(`I can't find a "${decoderid}" decoder.`); throw new Error() }
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if (!decoder) { throw this.compileError(`I can't find a "${decoderid}" decoder.`); }
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let result;
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try {
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result = decoder.parse();
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@ -529,13 +572,13 @@ export class ECSCompiler extends Tokenizer {
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}
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getEntityField(e: Entity, name: string): ComponentFieldPair {
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if (!this.currentScope) { this.internalError(); throw new Error(); }
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if (!this.currentScope) { throw this.internalError(); }
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let comps = this.em.componentsWithFieldName([e.etype], 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 component = comps[0];
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let field = component.fields.find(f => f.name == name);
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if (!field) { this.internalError(); throw new Error(); }
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if (!field) { throw this.internalError(); }
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return { c: component, f: field };
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}
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@ -557,8 +600,7 @@ export class ECSCompiler extends Tokenizer {
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let name = token.str;
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let eref = scope.entities.find(e => e.name == name);
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if (!eref) {
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this.compileError(`I couldn't find an entity named "${name}" in this scope.`, token.$loc)
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throw new Error();
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throw this.compileError(`I couldn't find an entity named "${name}" in this scope.`, token.$loc)
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}
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return eref;
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}
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@ -570,7 +612,7 @@ export class ECSCompiler extends Tokenizer {
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let atypes = this.em.archetypesMatching(ref.reftype.query);
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let entities = scope.entitiesMatching(atypes);
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if (entities.length == 0)
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this.compileError(`This entity doesn't seem to fit the reference type.`, ref.token.$loc);
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throw this.compileError(`This entity doesn't seem to fit the reference type.`, ref.token.$loc);
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id -= entities[0].id;
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}
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return id;
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@ -579,7 +621,7 @@ export class ECSCompiler extends Tokenizer {
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parseSystemInstanceRef(): SystemInstance {
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let name = this.expectIdent().str;
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let system = this.em.getSystemByName(name);
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if (!system) this.compileError(`I couldn't find a system named "${name}".`, this.lasttoken.$loc);
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if (!system) throw this.compileError(`I couldn't find a system named "${name}".`, this.lasttoken.$loc);
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let params = {};
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let inst = { system, params, id: 0 };
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return inst;
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@ -587,7 +629,7 @@ export class ECSCompiler extends Tokenizer {
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parseSystemInstanceParameters(): SystemInstanceParameters {
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let scope = this.currentScope;
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if (scope == null) throw new Error();
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if (scope == null) throw this.internalError();
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if (this.peekToken().str == '[') {
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return { query: this.parseQuery() };
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}
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@ -619,6 +661,141 @@ export class ECSCompiler extends Tokenizer {
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checkLowerLimit(value: number, lower: number, what: string) {
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if (value < lower) this.compileError(`This ${what} is too low; must be ${lower} or more`);
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}
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// expression stuff
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parseConstant(): DataValue {
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let expr = this.parseExpr();
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expr = this.em.evalExpr(expr, this.currentScope);
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if (isLiteral(expr)) return expr.value;
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throw this.compileError('This expression is not a constant.');
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}
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parseIntegerConstant(): number {
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let value = this.parseConstant();
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if (typeof value === 'number') return value;
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throw this.compileError('This expression is not an integer.');
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}
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parseExpr(): Expr {
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var startloc = this.peekToken().$loc;
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var expr = this.parseExpr1(this.parsePrimary(), 0);
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var endloc = this.lasttoken.$loc;
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expr.$loc = mergeLocs(startloc, endloc);
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return expr;
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}
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parseExpr1(left: Expr, minPred: number): Expr {
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let look = this.peekToken();
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while (getPrecedence(look) >= minPred) {
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let op = this.consumeToken();
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let right: Expr = this.parsePrimary();
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look = this.peekToken();
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while (getPrecedence(look) > getPrecedence(op)) {
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right = this.parseExpr1(right, getPrecedence(look));
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look = this.peekToken();
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}
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var opfn = getOperator(op.str).f;
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// use logical operators instead of bitwise?
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if (op.str == 'AND') opfn = 'land';
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if (op.str == 'OR') opfn = 'lor';
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var valtype = this.exprTypeForOp(opfn, left, right, op);
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left = { valtype:valtype, op:opfn, left: left, right: right };
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}
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return left;
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}
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parsePrimary(): Expr {
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let tok = this.consumeToken();
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switch (tok.type) {
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case ECSTokenType.Integer:
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this.pushbackToken(tok);
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let value = this.expectInteger();
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let valtype : IntType = { dtype: 'int', lo: value, hi: value };
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return { valtype, value };
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case TokenType.Ident:
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if (tok.str == 'NOT') {
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let expr = this.parsePrimary();
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let valtype : IntType = { dtype: 'int', lo: 0, hi: 1 };
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return { valtype, op: 'lnot', expr: expr };
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} else {
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this.pushbackToken(tok);
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return this.parseVarSubscriptOrFunc();
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}
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case ECSTokenType.Operator:
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if (tok.str == '(') {
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let expr = this.parseExpr();
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this.expectToken(')', `There should be another expression or a ")" here.`);
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return expr;
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} else if (tok.str == '-') {
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let expr = this.parsePrimary(); // TODO: -2^2=-4 and -2-2=-4
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let valtype = (expr as ExprBase).valtype;
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if (valtype?.dtype == 'int') {
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let hi = Math.abs(valtype.hi);
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let negtype : IntType = { dtype: 'int', lo: -hi, hi: hi };
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return { valtype: negtype, op: 'neg', expr: expr };
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}
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} else if (tok.str == '+') {
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return this.parsePrimary(); // ignore unary +
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}
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default:
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throw this.compileError(`The expression is incomplete.`);
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}
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}
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parseVarSubscriptOrFunc(): LExpr {
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var tok = this.consumeToken();
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switch (tok.type) {
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case TokenType.Ident:
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// component:field
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if (this.ifToken(':')) {
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let ftok = this.consumeToken();
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let component = this.em.getComponentByName(tok.str);
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if (!component) throw this.compileError(`A component named "${tok.str}" has not been defined.`);
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let field = component.fields.find(f => f.name == ftok.str);
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if (!field) throw this.compileError(`There is no "${ftok.str}" field in the ${tok.str} component.`);
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if (!this.currentScope) throw this.compileError(`This operation only works inside of a scope.`);
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let atypes = this.em.archetypesMatching({ include: [component] })
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let entities = this.currentScope.entitiesMatching(atypes);
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return { entities, field } as EntitySetField;
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}
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// entity.field
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if (this.ifToken('.')) {
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let ftok = this.consumeToken();
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if (!this.currentScope) throw this.compileError(`This operation only works inside of a scope.`);
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let entity = this.currentScope.getEntityByName(tok.str);
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if (!entity) throw this.compileError(`An entity named "${tok.str}" has not been defined.`);
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let component = this.em.singleComponentWithFieldName([entity.etype], ftok.str, ftok);
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let field = component.fields.find(f => f.name == ftok.str);
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if (!field) throw this.compileError(`There is no "${ftok.str}" field in this entity.`);
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let entities = [entity];
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return { entities, field } as EntitySetField;
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}
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let args : Expr[] = [];
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if (this.ifToken('(')) {
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args = this.parseExprList();
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this.expectToken(')', `There should be another expression or a ")" here.`);
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}
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var loc = mergeLocs(tok.$loc, this.lasttoken.$loc);
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var valtype = this.exprTypeForSubscript(tok.str, args, loc);
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return { valtype: valtype, name: tok.str, args: args, $loc:loc };
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default:
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throw this.compileError(`There should be a variable name here.`);
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}
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}
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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, ',');
|
||||
}
|
||||
}
|
||||
|
||||
///
|
||||
|
||||
@ -1,4 +1,5 @@
|
||||
|
||||
import { Token } from "../tokenizer";
|
||||
import { SourceLocated, SourceLocation } from "../workertypes";
|
||||
import { Bin, Packer } from "./binpack";
|
||||
|
||||
@ -196,6 +197,72 @@ export interface ComponentFieldPair {
|
||||
f: DataField;
|
||||
}
|
||||
|
||||
// Expressions
|
||||
|
||||
export interface ForwardRef extends SourceLocated {
|
||||
reftype: RefType | undefined
|
||||
token: Token
|
||||
}
|
||||
|
||||
export type LExpr = IndOp | EntitySetField;
|
||||
export type ExprTypes = BinOp | UnOp | Literal | ForwardRef | LExpr;
|
||||
export type Expr = ExprTypes; // & SourceLocated;
|
||||
export type Opcode = string;
|
||||
export type Value = DataValue;
|
||||
|
||||
export interface ExprBase extends SourceLocated {
|
||||
valtype: DataType;
|
||||
}
|
||||
|
||||
export interface Literal extends ExprBase {
|
||||
value: Value;
|
||||
}
|
||||
|
||||
export interface LiteralInt extends Literal {
|
||||
value: number;
|
||||
valtype: IntType;
|
||||
}
|
||||
|
||||
export interface BinOp extends ExprBase {
|
||||
op: Opcode;
|
||||
left: Expr;
|
||||
right: Expr;
|
||||
}
|
||||
|
||||
export interface UnOp extends ExprBase {
|
||||
op: 'neg' | 'lnot' | 'bnot';
|
||||
expr: Expr;
|
||||
}
|
||||
|
||||
export interface IndOp extends ExprBase {
|
||||
name: string;
|
||||
args: Expr[];
|
||||
}
|
||||
|
||||
export interface EntitySetField extends ExprBase {
|
||||
entities: Entity[];
|
||||
field: DataField;
|
||||
}
|
||||
|
||||
export function isLiteral(arg: Expr): arg is Literal {
|
||||
return (arg as any).value != null;
|
||||
}
|
||||
export function isLiteralInt(arg: Expr): arg is LiteralInt {
|
||||
return isLiteral(arg) && arg.valtype.dtype == 'int';
|
||||
}
|
||||
export function isLookup(arg: Expr): arg is IndOp {
|
||||
return (arg as any).name != null;
|
||||
}
|
||||
export function isBinOp(arg: Expr): arg is BinOp {
|
||||
return (arg as any).op != null && (arg as any).left != null && (arg as any).right != null;
|
||||
}
|
||||
export function isUnOp(arg: Expr): arg is UnOp {
|
||||
return (arg as any).op != null && (arg as any).expr != null;
|
||||
}
|
||||
|
||||
|
||||
/// DIALECT
|
||||
|
||||
export class Dialect_CA65 {
|
||||
|
||||
ASM_ITERATE_EACH_ASC = `
|
||||
@ -1758,4 +1825,50 @@ export class EntityManager {
|
||||
}
|
||||
return { scopes, components, fields, systems, events, entities };
|
||||
}
|
||||
|
||||
// expression stuff
|
||||
|
||||
evalExpr(expr: Expr, scope: EntityScope | null) : Expr {
|
||||
if (isLiteral(expr)) return expr;
|
||||
if (isBinOp(expr) || isUnOp(expr)) {
|
||||
var fn = (this as any)['evalop__' + expr.op];
|
||||
if (!fn) throw new ECSError(`no eval function for "${expr.op}"`);
|
||||
}
|
||||
if (isBinOp(expr)) {
|
||||
expr.left = this.evalExpr(expr.left, scope);
|
||||
expr.right = this.evalExpr(expr.right, scope);
|
||||
let e = fn(expr.left, expr.right);
|
||||
return e || expr;
|
||||
}
|
||||
if (isUnOp(expr)) {
|
||||
expr.expr = this.evalExpr(expr.expr, scope);
|
||||
let e = fn(expr.expr);
|
||||
return e || expr;
|
||||
}
|
||||
return expr;
|
||||
}
|
||||
evalop__neg(arg: Expr) : Expr | undefined {
|
||||
if (isLiteralInt(arg)) {
|
||||
let valtype : IntType = { dtype:'int',
|
||||
lo: -arg.valtype.hi,
|
||||
hi: arg.valtype.hi };
|
||||
return { valtype, value: -arg.value };
|
||||
}
|
||||
}
|
||||
evalop__add(left: Expr, right: Expr) : Expr | undefined {
|
||||
if (isLiteralInt(left) && isLiteralInt(right)) {
|
||||
let valtype : IntType = { dtype:'int',
|
||||
lo: left.valtype.lo + right.valtype.lo,
|
||||
hi: left.valtype.hi + right.valtype.hi };
|
||||
return { valtype, value: left.value + right.value };
|
||||
}
|
||||
}
|
||||
evalop__sub(left: Expr, right: Expr) : Expr | undefined {
|
||||
if (isLiteralInt(left) && isLiteralInt(right)) {
|
||||
let valtype : IntType = { dtype:'int',
|
||||
lo: left.valtype.lo - right.valtype.hi,
|
||||
hi: left.valtype.hi - right.valtype.lo };
|
||||
return { valtype, value: left.value - right.value };
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -149,15 +149,17 @@ export class Tokenizer {
|
||||
this.errors.push({ path: loc.path, line: loc.line, label: this.curlabel, start: loc.start, end: loc.end, msg: msg });
|
||||
}
|
||||
internalError() {
|
||||
this.compileError("Internal error.");
|
||||
return this.compileError("Internal error.");
|
||||
}
|
||||
notImplementedError() {
|
||||
this.compileError("Not yet implemented.");
|
||||
return this.compileError("Not yet implemented.");
|
||||
}
|
||||
compileError(msg: string, loc?: SourceLocation, loc2?: SourceLocation) {
|
||||
compileError(msg: string, loc?: SourceLocation, loc2?: SourceLocation) : CompileError {
|
||||
this.addError(msg, loc);
|
||||
//if (loc2 != null) this.addError(`...`, loc2);
|
||||
throw new CompileError(msg, loc);
|
||||
let e = new CompileError(msg, loc);
|
||||
throw e;
|
||||
return e;
|
||||
}
|
||||
peekToken(lookahead?: number): Token {
|
||||
let tok = this.tokens[lookahead || 0];
|
||||
|
||||
Loading…
Reference in New Issue
Block a user