28 lines
983 B
TypeScript
28 lines
983 B
TypeScript
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import { SourceFile, TextFile } from "./cst";
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import { Diagnostics, UnexpectedCharDiagnostic, UnexpectedTokenDiagnostic } from "./diagnostics";
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import { ParseError, Parser } from "./parser";
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import { Punctuator, ScanError, Scanner } from "./scanner";
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export function parseSourceFile(file: TextFile, diagnostics: Diagnostics): SourceFile | null {
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const scanner = new Scanner(file.text, 0, diagnostics, file);
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const punctuated = new Punctuator(scanner);
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const parser = new Parser(file, punctuated);
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let sourceFile;
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try {
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sourceFile = parser.parseSourceFile();
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} catch (error) {
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if (error instanceof ParseError) {
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diagnostics.add(new UnexpectedTokenDiagnostic(error.file, error.actual, error.expected));
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return null;
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}
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if (error instanceof ScanError) {
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diagnostics.add(new UnexpectedCharDiagnostic(error.file, error.position, error.actual));
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return null;
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}
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throw error;
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}
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sourceFile.setParents();
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return sourceFile;
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}
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