Sierra Style Parsers in AGS

• Each word is associated with an ID number.
• An ID of zero means the word is ignored while reading.
• Multiple words may share an ID; this makes them synonyms with one another.

Parsing

• Input from the user is tokenized and replaced with IDs from the table.
• Scripts can then ask if the list of IDs matches a list of IDs that means something.

AGS scripting lets you say Parser.Said("foo [bar]") which replaces foo and bar with the IDs from the table. Notation in brackets makes a word optional.

For example "fiery potato" would become 3 7. If potato and spud were synonyms then both "fiery potato" and "fiery spud" would be parsed as 3 7.

Special tokens

• rol: matches the rest of input line
• anyword: matches a single word