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Type aliases

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This commit is contained in:
dcodeIO
2017-12-20 13:36:39 +01:00
parent 9632777842
commit dd5c3e7a4e
6 changed files with 113 additions and 11 deletions
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12
src/program.ts
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@ -76,6 +76,8 @@ export class Program extends DiagnosticEmitter {
elements: Map<string,Element> = new Map();
/** Types by internal name. */
types: Map<string,Type> = noTypesYet;
/** Declared type aliases. */
typeAliases: Map<string,TypeNode> = new Map();
/** Exports of individual files by internal name. Not global exports. */
exports: Map<string,Element> = new Map();
@ -663,12 +665,11 @@ export class Program extends DiagnosticEmitter {
private initializeType(declaration: TypeDeclaration, namespace: Element | null = null): void {
// type aliases are program globals
const name: string = declaration.name.name;
if (this.types.has(name)) {
if (this.types.has(name) || this.typeAliases.has(name)) {
this.error(DiagnosticCode.Duplicate_identifier_0, declaration.name.range, name);
return;
}
// TODO: queue, then resolve
throw new Error("not implemented");
this.typeAliases.set(name, declaration.alias);
}
private initializeVariables(statement: VariableStatement, namespace: Element | null = null): void {
@ -741,6 +742,11 @@ export class Program extends DiagnosticEmitter {
if (type = <Type | null>this.types.get(globalName))
return type;
// check type alias
let alias: TypeNode | null = <TypeNode | null>this.typeAliases.get(globalName);
if (alias && (type = this.resolveType(alias, null, reportNotFound)))
return type;
if (reportNotFound)
this.error(DiagnosticCode.Cannot_find_name_0, node.identifier.range, globalName);