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Basic

Filling with escaping

A value is text from a writer. Text from a writer can contain the shape of a page, and the shape is the reason escaping exists.

What you will see

One line with a reason. The permission is named, which is the claim.

About 1 min of reading

Try It

Prove a tag answers as text

1

Write the table

printf 'lt <\ngt >\namp &\n' > /tmp/t.txt; wc -l < /tmp/t.txt

Before you run it, say out loud what it will print. Then open the answer.

What it prints
3. Three lines is the table, which is a file.
2

Escape a title

printf 'a

Before you run it, say out loud what it will print. Then open the answer.

What it prints
a<b. The tag became text, which is the proof.
3

Name the passed hole

printf 'hole=body escaped=false reason=already-shaped\n' > /tmp/n.txt; cat /tmp/n.txt

Before you run it, say out loud what it will print. Then open the answer.

What it prints
One line with a reason. The permission is named, which is the claim.

Data Flow

A value to escaped text
1 The table is written
↓
2 Every hole except the named one is escaped
↓
3 A tag in a value answers as text
↓
4 The named hole is passed through
Why this works
Why the unescaped hole is named

A hole that is not escaped is a permission. A permission that is named is a permission that can be argued with.

The test that must exist

A title with a tag in it answers with the tag as text. The answer is the whole proof.

Examples

The escape is a table

A character to a name. A table is a file, and a file is what a reader can check.

Escaping is not optional

Every hole is escaped. Every is the decision, and the decision is why a title cannot open a tag.

One hole is not escaped

The body, because the body is already shaped. A hole that is not escaped is a hole that is named as such.

Words this lesson uses

Each one is defined here on this site. Open the entry for the full definition and the other words it points at.

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