func()

in go/tools/builders/read.go [181:277]

• 83 lines of code
• 30 McCabe index (conditional complexity)

func (r *importReader) findEmbed(first bool) bool {
	// The import block scan stopped after a non-space character,
	// so the reader is not at the start of a line on the first call.
	// After that, each //go:embed extraction leaves the reader
	// at the end of a line.
	startLine := !first
	var c byte
	for r.err == nil && !r.eof {
		c = r.readByteNoBuf()
	Reswitch:
		switch c {
		default:
			startLine = false

		case '\n':
			startLine = true

		case ' ', '\t':
			// leave startLine alone

		case '"':
			startLine = false
			for r.err == nil {
				if r.eof {
					r.syntaxError()
				}
				c = r.readByteNoBuf()
				if c == '\\' {
					r.readByteNoBuf()
					if r.err != nil {
						r.syntaxError()
						return false
					}
					continue
				}
				if c == '"' {
					c = r.readByteNoBuf()
					goto Reswitch
				}
			}
			goto Reswitch

		case '`':
			startLine = false
			for r.err == nil {
				if r.eof {
					r.syntaxError()
				}
				c = r.readByteNoBuf()
				if c == '`' {
					c = r.readByteNoBuf()
					goto Reswitch
				}
			}

		case '/':
			c = r.readByteNoBuf()
			switch c {
			default:
				startLine = false
				goto Reswitch

			case '*':
				var c1 byte
				for (c != '*' || c1 != '/') && r.err == nil {
					if r.eof {
						r.syntaxError()
					}
					c, c1 = c1, r.readByteNoBuf()
				}
				startLine = false

			case '/':
				if startLine {
					// Try to read this as a //go:embed comment.
					for i := range goEmbed {
						c = r.readByteNoBuf()
						if c != goEmbed[i] {
							goto SkipSlashSlash
						}
					}
					c = r.readByteNoBuf()
					if c == ' ' || c == '\t' {
						// Found one!
						return true
					}
				}
			SkipSlashSlash:
				for c != '\n' && r.err == nil && !r.eof {
					c = r.readByteNoBuf()
				}
				startLine = true
			}
		}
	}
	return false
}