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x/tools/gopls semantically tokenize export comments #604

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x/tools/gopls semantically tokenize export comments #604

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18 changes: 18 additions & 0 deletions gopls/internal/golang/semtok.go
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,9 @@ func (tv *tokenVisitor) comment(c *ast.Comment, importByName map[string]*types.P
if strings.HasPrefix(c.Text, "//go:") {
tv.godirective(c)
return
} else if strings.HasPrefix(c.Text, "//export") {
tv.goexport(c)
return
}

pkgScope := tv.pkg.Types().Scope()
Expand Down Expand Up @@ -923,6 +926,21 @@ func (tv *tokenVisitor) godirective(c *ast.Comment) {
}
}

func (tv *tokenVisitor) goexport(c *ast.Comment) {
funcName := strings.TrimPrefix(c.Text, "//export ")

// Make the 'export func' part stand out, the rest is comments.
tv.token(c.Pos(), len("//"), semtok.TokComment)

exportStart := c.Pos() + token.Pos(len("//"))
tv.token(exportStart, len("export "), semtok.TokNamespace)

if len(funcName) > 0 {
funcStart := c.Pos() + token.Pos(len("//export "))
tv.token(funcStart, len(funcName), semtok.TokFunction)
}
}

// Go 1.20 strings.CutPrefix.
func stringsCutPrefix(s, prefix string) (after string, found bool) {
if !strings.HasPrefix(s, prefix) {
Expand Down