vendor tsgo

tools/tsgo/internal/parser/utilities.go

@@ -0,0 +1,56 @@
+package parser
+
+import (
+	"slices"
+
+	"github.com/microsoft/typescript-go/internal/ast"
+	"github.com/microsoft/typescript-go/internal/core"
+	"github.com/microsoft/typescript-go/internal/scanner"
+)
+
+func getLanguageVariant(scriptKind core.ScriptKind) core.LanguageVariant {
+	switch scriptKind {
+	case core.ScriptKindTSX, core.ScriptKindJSX, core.ScriptKindJS, core.ScriptKindJSON:
+		// .tsx and .jsx files are treated as jsx language variant.
+		return core.LanguageVariantJSX
+	}
+	return core.LanguageVariantStandard
+}
+
+func tokenIsIdentifierOrKeyword(token ast.Kind) bool {
+	return token >= ast.KindIdentifier
+}
+
+func tokenIsIdentifierOrKeywordOrGreaterThan(token ast.Kind) bool {
+	return token == ast.KindGreaterThanToken || tokenIsIdentifierOrKeyword(token)
+}
+
+func GetJSDocCommentRanges(f *ast.NodeFactory, commentRanges []ast.CommentRange, node *ast.Node, text string) []ast.CommentRange {
+	switch node.Kind {
+	case ast.KindParameter, ast.KindTypeParameter, ast.KindFunctionExpression, ast.KindArrowFunction, ast.KindParenthesizedExpression, ast.KindVariableDeclaration, ast.KindExportSpecifier:
+		for commentRange := range scanner.GetTrailingCommentRanges(f, text, node.Pos()) {
+			commentRanges = append(commentRanges, commentRange)
+		}
+		for commentRange := range scanner.GetLeadingCommentRanges(f, text, node.Pos()) {
+			commentRanges = append(commentRanges, commentRange)
+		}
+	default:
+		for commentRange := range scanner.GetLeadingCommentRanges(f, text, node.Pos()) {
+			commentRanges = append(commentRanges, commentRange)
+		}
+	}
+	// Keep if the comment starts with '/**' but not if it is '/**/'
+	return slices.DeleteFunc(commentRanges, func(comment ast.CommentRange) bool {
+		commentStart := comment.Pos()
+		commentLen := comment.End() - commentStart
+		return comment.End() > node.End() || commentLen < 4 || text[commentStart+1] != '*' || text[commentStart+2] != '*' || text[commentStart+3] == '/'
+	})
+}
+
+func isKeywordOrPunctuation(token ast.Kind) bool {
+	return ast.IsKeywordKind(token) || ast.IsPunctuationKind(token)
+}
+
+func isJSDocLikeText(text string) bool {
+	return len(text) >= 4 && text[1] == '*' && text[2] == '*' && text[3] != '/'
+}