mirror of
https://github.com/enso-org/enso.git
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bf76be6e6b
- Removed `Cursor` and moved all accessors to standalone functions, reducing the generated code size significantly (especially after minification). - Removed unnecessary `seek`s from everywhere. Now the offseting is part of each `read` implementation. - Removed unnecessary differences between `read`s on abstract and concrete types. Now abstract types do the pointer access internally in their `read`.
98 lines
3.0 KiB
TypeScript
98 lines
3.0 KiB
TypeScript
import * as changeCase from 'change-case'
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import ts from 'typescript'
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const tsf = ts.factory
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// === Identifier utilities ===
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export function toPascal(ident: string): string {
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if (ident.includes('.')) throw new Error('toPascal cannot be applied to a namespaced name.')
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return changeCase.pascalCase(ident)
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}
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export function toCamel(ident: string): string {
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if (ident.includes('.')) throw new Error('toCamel cannot be applied to a namespaced name.')
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return changeCase.camelCase(ident)
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}
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const RENAME = new Map([
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// TS reserved words.
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['constructor', 'ident'],
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['type', 'typeNode'],
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// Rename source references to reflect our usage:
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// - In `Tree`s:
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['spanLeftOffsetCodeOffsetUtf16', 'whitespaceStartInCodeParsed'],
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['spanLeftOffsetCodeUtf16', 'whitespaceLengthInCodeParsed'],
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['spanCodeLengthUtf16', 'childrenLengthInCodeParsed'],
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// - In `Tokens`s:
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['leftOffsetCodeOffsetUtf16', 'whitespaceStartInCodeBuffer'],
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['leftOffsetCodeUtf16', 'whitespaceLengthInCodeBuffer'],
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['codeUtf16', 'lengthInCodeBuffer'],
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['codeOffsetUtf16', 'startInCodeBuffer'],
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])
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export function mapIdent(ident: string): string {
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return RENAME.get(ident) ?? ident
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}
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export function namespacedName(name: string, namespace?: string): string {
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if (namespace == null) {
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return toPascal(name)
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} else {
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return toPascal(namespace) + '.' + toPascal(name)
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}
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}
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// === AST utilities ===
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export const modifiers = {
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export: tsf.createModifier(ts.SyntaxKind.ExportKeyword),
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const: tsf.createModifier(ts.SyntaxKind.ConstKeyword),
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readonly: tsf.createModifier(ts.SyntaxKind.ReadonlyKeyword),
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abstract: tsf.createModifier(ts.SyntaxKind.AbstractKeyword),
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static: tsf.createModifier(ts.SyntaxKind.StaticKeyword),
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protected: tsf.createModifier(ts.SyntaxKind.ProtectedKeyword),
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} as const
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export function assignmentStatement(left: ts.Expression, right: ts.Expression): ts.Statement {
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return tsf.createExpressionStatement(
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tsf.createBinaryExpression(left, ts.SyntaxKind.EqualsToken, right),
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)
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}
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export function forwardToSuper(
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ident: ts.Identifier,
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type: ts.TypeNode,
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modifiers?: ts.ModifierLike[],
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) {
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return tsf.createConstructorDeclaration(
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modifiers,
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[tsf.createParameterDeclaration([], undefined, ident, undefined, type, undefined)],
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tsf.createBlock([
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tsf.createExpressionStatement(
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tsf.createCallExpression(tsf.createIdentifier('super'), [], [ident]),
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),
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]),
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)
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}
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export function casesOrThrow(cases: ts.CaseClause[], error: string): ts.CaseBlock {
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return tsf.createCaseBlock([...cases, tsf.createDefaultClause([throwError(error)])])
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}
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export function throwError(error: string): ts.Statement {
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return tsf.createThrowStatement(
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tsf.createNewExpression(tsf.createIdentifier('Error'), [], [tsf.createStringLiteral(error)]),
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)
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}
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export function makeArrow(params: ts.BindingName[], expr: ts.Expression) {
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return tsf.createArrowFunction(
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[],
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[],
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params.map((ident) => tsf.createParameterDeclaration([], undefined, ident)),
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undefined,
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undefined,
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expr,
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)
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}
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