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feat: Report a diagnostic when attempting to use a template literal #1702

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Merged
merged 1 commit into from
Mar 2, 2021
Merged

feat: Report a diagnostic when attempting to use a template literal #1702

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9 changes: 9 additions & 0 deletions src/tokenizer.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1070,6 +1070,15 @@ export class Tokenizer extends DiagnosticEmitter {
var quote = text.charCodeAt(pos++);
var start = pos;
var result = "";

if (quote == CharCode.BACKTICK) {
this.warning(
DiagnosticCode.Not_implemented_0,
this.range(start - 1, end),
"Template Literals can only be used for multi-line strings. Interpolation is not supported."
);
}

while (true) {
if (pos >= end) {
result += text.substring(start, pos);
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1 change: 1 addition & 0 deletions tests/parser/literals.ts
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Expand Up @@ -70,6 +70,7 @@
7_;
1.a;
2.0b;
`123`;

// technically invalid, but not handled by AS yet, TS1005: ';' expected
3 4;
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2 changes: 2 additions & 0 deletions tests/parser/literals.ts.fixture.ts
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Expand Up @@ -67,6 +67,7 @@ b;
a;
2;
b;
"123";
3;
4;
5;
Expand All @@ -82,3 +83,4 @@ b;
// ERROR 6188: "Numeric separators are not allowed here." in literals.ts(70,2+0)
// ERROR 1351: "An identifier or keyword cannot immediately follow a numeric literal." in literals.ts(71,3+0)
// ERROR 1351: "An identifier or keyword cannot immediately follow a numeric literal." in literals.ts(72,4+0)
// WARNING 100: "Not implemented: Template Literals can only be used for multi-line strings. Interpolation is not supported." in literals.ts(73,1+102)