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							143 lines
						
					
					
						
							5.1 KiB
						
					
					
				
			
		
		
	
	
							143 lines
						
					
					
						
							5.1 KiB
						
					
					
				"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ValueScope = exports.ValueScopeName = exports.Scope = exports.varKinds = exports.UsedValueState = void 0;
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const code_1 = require("./code");
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class ValueError extends Error {
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    constructor(name) {
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        super(`CodeGen: "code" for ${name} not defined`);
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        this.value = name.value;
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    }
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}
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var UsedValueState;
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(function (UsedValueState) {
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    UsedValueState[UsedValueState["Started"] = 0] = "Started";
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    UsedValueState[UsedValueState["Completed"] = 1] = "Completed";
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})(UsedValueState = exports.UsedValueState || (exports.UsedValueState = {}));
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exports.varKinds = {
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    const: new code_1.Name("const"),
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    let: new code_1.Name("let"),
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    var: new code_1.Name("var"),
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};
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class Scope {
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    constructor({ prefixes, parent } = {}) {
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        this._names = {};
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        this._prefixes = prefixes;
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        this._parent = parent;
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    }
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    toName(nameOrPrefix) {
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        return nameOrPrefix instanceof code_1.Name ? nameOrPrefix : this.name(nameOrPrefix);
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    }
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    name(prefix) {
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        return new code_1.Name(this._newName(prefix));
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    }
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    _newName(prefix) {
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        const ng = this._names[prefix] || this._nameGroup(prefix);
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        return `${prefix}${ng.index++}`;
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    }
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    _nameGroup(prefix) {
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        var _a, _b;
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        if (((_b = (_a = this._parent) === null || _a === void 0 ? void 0 : _a._prefixes) === null || _b === void 0 ? void 0 : _b.has(prefix)) || (this._prefixes && !this._prefixes.has(prefix))) {
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            throw new Error(`CodeGen: prefix "${prefix}" is not allowed in this scope`);
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        }
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        return (this._names[prefix] = { prefix, index: 0 });
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    }
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}
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exports.Scope = Scope;
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class ValueScopeName extends code_1.Name {
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    constructor(prefix, nameStr) {
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        super(nameStr);
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        this.prefix = prefix;
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    }
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    setValue(value, { property, itemIndex }) {
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        this.value = value;
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        this.scopePath = (0, code_1._) `.${new code_1.Name(property)}[${itemIndex}]`;
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    }
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}
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exports.ValueScopeName = ValueScopeName;
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const line = (0, code_1._) `\n`;
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class ValueScope extends Scope {
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    constructor(opts) {
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        super(opts);
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        this._values = {};
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        this._scope = opts.scope;
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        this.opts = { ...opts, _n: opts.lines ? line : code_1.nil };
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    }
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    get() {
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        return this._scope;
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    }
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    name(prefix) {
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        return new ValueScopeName(prefix, this._newName(prefix));
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    }
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    value(nameOrPrefix, value) {
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        var _a;
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        if (value.ref === undefined)
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            throw new Error("CodeGen: ref must be passed in value");
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        const name = this.toName(nameOrPrefix);
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        const { prefix } = name;
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        const valueKey = (_a = value.key) !== null && _a !== void 0 ? _a : value.ref;
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        let vs = this._values[prefix];
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        if (vs) {
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            const _name = vs.get(valueKey);
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            if (_name)
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                return _name;
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        }
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        else {
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            vs = this._values[prefix] = new Map();
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        }
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        vs.set(valueKey, name);
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        const s = this._scope[prefix] || (this._scope[prefix] = []);
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        const itemIndex = s.length;
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        s[itemIndex] = value.ref;
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        name.setValue(value, { property: prefix, itemIndex });
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        return name;
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    }
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    getValue(prefix, keyOrRef) {
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        const vs = this._values[prefix];
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        if (!vs)
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            return;
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        return vs.get(keyOrRef);
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    }
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    scopeRefs(scopeName, values = this._values) {
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        return this._reduceValues(values, (name) => {
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            if (name.scopePath === undefined)
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                throw new Error(`CodeGen: name "${name}" has no value`);
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            return (0, code_1._) `${scopeName}${name.scopePath}`;
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        });
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    }
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    scopeCode(values = this._values, usedValues, getCode) {
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        return this._reduceValues(values, (name) => {
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            if (name.value === undefined)
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                throw new Error(`CodeGen: name "${name}" has no value`);
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            return name.value.code;
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        }, usedValues, getCode);
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    }
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    _reduceValues(values, valueCode, usedValues = {}, getCode) {
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        let code = code_1.nil;
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        for (const prefix in values) {
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            const vs = values[prefix];
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            if (!vs)
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                continue;
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            const nameSet = (usedValues[prefix] = usedValues[prefix] || new Map());
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            vs.forEach((name) => {
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                if (nameSet.has(name))
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                    return;
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                nameSet.set(name, UsedValueState.Started);
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                let c = valueCode(name);
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                if (c) {
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                    const def = this.opts.es5 ? exports.varKinds.var : exports.varKinds.const;
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                    code = (0, code_1._) `${code}${def} ${name} = ${c};${this.opts._n}`;
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                }
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                else if ((c = getCode === null || getCode === void 0 ? void 0 : getCode(name))) {
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                    code = (0, code_1._) `${code}${c}${this.opts._n}`;
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                }
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                else {
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                    throw new ValueError(name);
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                }
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                nameSet.set(name, UsedValueState.Completed);
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            });
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        }
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        return code;
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    }
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}
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exports.ValueScope = ValueScope;
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//# sourceMappingURL=scope.js.map
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