mirror of
https://github.com/fluencelabs/assemblyscript
synced 2025-04-24 22:52:13 +00:00
Implement optional trailing commas (#97)
This commit is contained in:
Alan Pierce
Daniel Wirtz
parent
25a1f6230a
commit
00fee73022
@ -967,6 +967,7 @@ export class ASTBuilder {
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this.serializeDecorator(decorators[i]);
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}
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}
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this.serializeExternalModifiers(node);
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this.serializeAccessModifiers(node);
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if (node.name.text.length) {
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sb.push("function ");
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189
src/parser.ts
189
src/parser.ts
@ -819,18 +819,20 @@ export class Parser extends DiagnosticEmitter {
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return null;
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}
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var members = new Array<EnumValueDeclaration>();
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if (!tn.skip(Token.CLOSEBRACE)) {
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do {
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let member = this.parseEnumValue(tn, CommonFlags.NONE);
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if (!member) return null;
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members.push(<EnumValueDeclaration>member);
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} while (tn.skip(Token.COMMA));
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if (!tn.skip(Token.CLOSEBRACE)) {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), "}"
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);
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return null;
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while (!tn.skip(Token.CLOSEBRACE)) {
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let member = this.parseEnumValue(tn, CommonFlags.NONE);
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if (!member) return null;
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members.push(<EnumValueDeclaration>member);
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if (!tn.skip(Token.COMMA)) {
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if (tn.skip(Token.CLOSEBRACE)) {
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break;
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} else {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), "}"
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);
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return null;
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}
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}
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}
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var ret = Node.createEnumDeclaration(
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@ -899,20 +901,23 @@ export class Parser extends DiagnosticEmitter {
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// at '<': TypeParameter (',' TypeParameter)* '>'
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var typeParameters = new Array<TypeParameterNode>();
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if (!tn.skip(Token.GREATERTHAN)) {
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do {
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let typeParameter = this.parseTypeParameter(tn);
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if (!typeParameter) return null;
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typeParameters.push(<TypeParameterNode>typeParameter);
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} while (tn.skip(Token.COMMA));
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if (!tn.skip(Token.GREATERTHAN)) {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), ">"
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);
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return null;
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while (!tn.skip(Token.GREATERTHAN)) {
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let typeParameter = this.parseTypeParameter(tn);
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if (!typeParameter) return null;
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typeParameters.push(<TypeParameterNode>typeParameter);
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if (!tn.skip(Token.COMMA)) {
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if (tn.skip(Token.GREATERTHAN)) {
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break;
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} else {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), ">"
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);
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return null;
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}
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}
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} else {
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}
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if (typeParameters.length === 0) {
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this.error(
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DiagnosticCode.Type_parameter_list_cannot_be_empty,
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tn.range()
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@ -971,45 +976,47 @@ export class Parser extends DiagnosticEmitter {
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var seenOptional = false;
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var reportedRest = false;
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if (tn.peek() != Token.CLOSEPAREN) {
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do {
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let param = this.parseParameter(tn, isConstructor);
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if (!param) return null;
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if (seenRest && !reportedRest) {
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while (!tn.skip(Token.CLOSEPAREN)) {
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let param = this.parseParameter(tn, isConstructor);
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if (!param) return null;
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if (seenRest && !reportedRest) {
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this.error(
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DiagnosticCode.A_rest_parameter_must_be_last_in_a_parameter_list,
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seenRest.name.range
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);
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reportedRest = true;
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}
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switch (param.parameterKind) {
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default: {
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if (seenOptional) {
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this.error(
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DiagnosticCode.A_required_parameter_cannot_follow_an_optional_parameter,
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param.name.range
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);
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}
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break;
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}
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case ParameterKind.OPTIONAL: {
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seenOptional = true;
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break;
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}
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case ParameterKind.REST: {
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seenRest = param;
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break;
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}
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}
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parameters.push(param);
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if (!tn.skip(Token.COMMA)) {
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if (tn.skip(Token.CLOSEPAREN)) {
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break;
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} else {
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this.error(
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DiagnosticCode.A_rest_parameter_must_be_last_in_a_parameter_list,
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seenRest.name.range
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DiagnosticCode._0_expected,
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tn.range(), ")"
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);
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reportedRest = true;
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return null;
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}
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switch (param.parameterKind) {
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default: {
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if (seenOptional) {
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this.error(
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DiagnosticCode.A_required_parameter_cannot_follow_an_optional_parameter,
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param.name.range
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);
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}
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break;
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}
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case ParameterKind.OPTIONAL: {
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seenOptional = true;
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break;
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}
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case ParameterKind.REST: {
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seenRest = param;
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break;
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}
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}
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parameters.push(param);
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} while (tn.skip(Token.COMMA));
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}
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if (!tn.skip(Token.CLOSEPAREN)) {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), ")"
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);
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return null;
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}
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}
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return parameters;
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}
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@ -2877,23 +2884,24 @@ export class Parser extends DiagnosticEmitter {
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// ArrayLiteralExpression
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case Token.OPENBRACKET: {
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let elementExpressions = new Array<Expression | null>();
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if (!tn.skip(Token.CLOSEBRACKET)) {
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do {
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if (tn.peek() == Token.COMMA) {
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expr = null; // omitted
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while (!tn.skip(Token.CLOSEBRACKET)) {
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if (tn.peek() == Token.COMMA) {
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expr = null; // omitted
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} else {
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expr = this.parseExpression(tn, Precedence.COMMA + 1);
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if (!expr) return null;
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}
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elementExpressions.push(expr);
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if (!tn.skip(Token.COMMA)) {
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if (tn.skip(Token.CLOSEBRACKET)) {
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break;
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} else {
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expr = this.parseExpression(tn, Precedence.COMMA + 1);
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if (!expr) return null;
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), "]"
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);
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return null;
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}
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elementExpressions.push(expr);
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if (tn.peek() == Token.CLOSEBRACKET) break;
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} while (tn.skip(Token.COMMA));
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if (!tn.skip(Token.CLOSEBRACKET)) {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), "]"
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);
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return null;
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}
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}
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return Node.createArrayLiteralExpression(elementExpressions, tn.range(startPos, tn.pos));
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@ -2979,6 +2987,9 @@ export class Parser extends DiagnosticEmitter {
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if (!tn.skip(Token.LESSTHAN)) return null;
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var typeArguments = new Array<CommonTypeNode>();
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do {
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if (tn.peek() === Token.GREATERTHAN) {
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break;
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}
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let type = this.parseType(tn, true, true);
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if (!type) {
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tn.reset(state);
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@ -3000,18 +3011,20 @@ export class Parser extends DiagnosticEmitter {
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// at '(': (Expression (',' Expression)*)? ')'
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var args = new Array<Expression>();
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if (!tn.skip(Token.CLOSEPAREN)) {
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do {
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let expr = this.parseExpression(tn, Precedence.COMMA + 1);
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if (!expr) return null;
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args.push(expr);
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} while (tn.skip(Token.COMMA));
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if (!tn.skip(Token.CLOSEPAREN)) {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), ")"
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);
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return null;
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while (!tn.skip(Token.CLOSEPAREN)) {
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let expr = this.parseExpression(tn, Precedence.COMMA + 1);
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if (!expr) return null;
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args.push(expr);
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if (!tn.skip(Token.COMMA)) {
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if (tn.skip(Token.CLOSEPAREN)) {
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break;
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} else {
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this.error(
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DiagnosticCode._0_expected,
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tn.range(), ")"
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);
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return null;
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}
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}
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}
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return args;
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33
tests/parser/trailing-commas.ts
Normal file
33
tests/parser/trailing-commas.ts
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@ -0,0 +1,33 @@
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enum Foo {
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A,
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B,
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}
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function add(
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x: i32,
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y: i32,
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): i32 {
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return x + y;
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}
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function parameterized<
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A,
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B,
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>(a: A, b: B): void {
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}
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export function compute(): i32 {
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const arr: Array<i8> = [
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1,
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2,
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];
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parameterized<
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i8,
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// @ts-ignore: Waiting on https://github.com/Microsoft/TypeScript/issues/21984
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i32,
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>(0, 0);
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return add(
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1,
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2,
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);
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}
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13
tests/parser/trailing-commas.ts.fixture.ts
Normal file
13
tests/parser/trailing-commas.ts.fixture.ts
Normal file
@ -0,0 +1,13 @@
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enum Foo {
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A,
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B
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}
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function add(x: i32, y: i32): i32 {
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return x + y;
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}
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function parameterized<A, B>(a: A, b: B): void {}
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export function compute(): i32 {
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const arr: Array<i8> = [1, 2];
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parameterized<i8, i32>(0, 0);
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return add(1, 2);
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}
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