func()

in modfile/read.go [104:188]

• 74 lines of code
• 21 McCabe index (conditional complexity)

func (x *FileSyntax) addLine(hint Expr, tokens ...string) *Line {
	if hint == nil {
		// If no hint given, add to the last statement of the given type.
	Loop:
		for i := len(x.Stmt) - 1; i >= 0; i-- {
			stmt := x.Stmt[i]
			switch stmt := stmt.(type) {
			case *Line:
				if stmt.Token != nil && stmt.Token[0] == tokens[0] {
					hint = stmt
					break Loop
				}
			case *LineBlock:
				if stmt.Token[0] == tokens[0] {
					hint = stmt
					break Loop
				}
			}
		}
	}

	newLineAfter := func(i int) *Line {
		new := &Line{Token: tokens}
		if i == len(x.Stmt) {
			x.Stmt = append(x.Stmt, new)
		} else {
			x.Stmt = append(x.Stmt, nil)
			copy(x.Stmt[i+2:], x.Stmt[i+1:])
			x.Stmt[i+1] = new
		}
		return new
	}

	if hint != nil {
		for i, stmt := range x.Stmt {
			switch stmt := stmt.(type) {
			case *Line:
				if stmt == hint {
					if stmt.Token == nil || stmt.Token[0] != tokens[0] {
						return newLineAfter(i)
					}

					// Convert line to line block.
					stmt.InBlock = true
					block := &LineBlock{Token: stmt.Token[:1], Line: []*Line{stmt}}
					stmt.Token = stmt.Token[1:]
					x.Stmt[i] = block
					new := &Line{Token: tokens[1:], InBlock: true}
					block.Line = append(block.Line, new)
					return new
				}

			case *LineBlock:
				if stmt == hint {
					if stmt.Token[0] != tokens[0] {
						return newLineAfter(i)
					}

					new := &Line{Token: tokens[1:], InBlock: true}
					stmt.Line = append(stmt.Line, new)
					return new
				}

				for j, line := range stmt.Line {
					if line == hint {
						if stmt.Token[0] != tokens[0] {
							return newLineAfter(i)
						}

						// Add new line after hint within the block.
						stmt.Line = append(stmt.Line, nil)
						copy(stmt.Line[j+2:], stmt.Line[j+1:])
						new := &Line{Token: tokens[1:], InBlock: true}
						stmt.Line[j+1] = new
						return new
					}
				}
			}
		}
	}

	new := &Line{Token: tokens}
	x.Stmt = append(x.Stmt, new)
	return new
}