Class BeerScanner

Classdesc

Scans the source code string and returns a list of tokens.

Hierarchy

BeerScanner

Implements

BeerScanner

Implemented by

BeerScanner

Index

Constructors

Properties

current line logger source start tokens

Methods

add_source add_token advance current_char get_tokens identifier is_alpha is_alpha_numeric is_digit is_end match number peek print_tokens reset_scanner scan scan_tokens set_source string

Constructors

constructor

new BeerScanner(): BeerScanner
Returns BeerScanner
- Defined in src/scanner.ts:22

Properties

`Private` current

current: number = 0

`Private` line

line: number = 1

`Private` logger

logger: Logger = ...

source

source: string

`Private` start

start: number = 0

`Private` tokens

tokens: Token[]

Methods

add_source

add_source(source): void
Parameters
- source: string
Returns void
Implementation of BeerScanner.add_source
- Defined in src/scanner.ts:30

`Private` add_token

add_token(type, literal): void
Accumulate tokens at the specific range of the source code string
Parameters
- type: TokenType
  
  TokenType
- literal: Literals
  
  Literals
Returns void
Implementation of BeerScanner.add_token
- Defined in src/scanner.ts:96

`Private` advance

advance(): string
Consume the next character in the source code string and return it.

Returns string
the next character
Implementation of BeerScanner.advance
- Defined in src/scanner.ts:74

`Private` current_char

current_char(): string
Lookahead check the current character

Returns string
current character
Implementation of BeerScanner.current_char
- Defined in src/scanner.ts:116

get_tokens

get_tokens(): Token[]
Getter for the tokens

Returns Token[]
the tokens
Implementation of BeerScanner.get_tokens
- Defined in src/scanner.ts:323

`Private` identifier

identifier(): void
Look for reserved keywords or identifiers

Returns void
Implementation of BeerScanner.identifier
- Defined in src/scanner.ts:150

`Private` is_alpha

is_alpha(c): boolean
Check if is a letter
Parameters
- c: string
  
  {string} the character to check
Returns boolean
Implementation of BeerScanner.is_alpha
- Defined in src/scanner.ts:134

`Private` is_alpha_numeric

is_alpha_numeric(c): boolean
Check if the character is a letter or a digit
Parameters
- c: string
  
  {string} the character to check
Returns boolean
Implementation of BeerScanner.is_alpha_numeric
- Defined in src/scanner.ts:143

`Private` is_digit

is_digit(c): boolean
Check if is a digit
Parameters
- c: string
  
  {string} the character to check
Returns boolean
Implementation of BeerScanner.is_digit
- Defined in src/scanner.ts:125

`Private` is_end

is_end(): boolean
Checks if the scanner has reached the end of the source code string

Returns boolean
Implementation of BeerScanner.is_end
- Defined in src/scanner.ts:66

`Private` match

match(expected): boolean
Match the current character in the source code string with expected one
Parameters
- expected: string
  
  {string} the expected character
Returns boolean
Implementation of BeerScanner.match
- Defined in src/scanner.ts:84

`Private` number

number(): void
Look for number literals

Returns void
Implementation of BeerScanner.number
- Defined in src/scanner.ts:193

`Private` peek

peek(): string
Lookahead check the next character but does not consume like this.advance()

Returns string

See
this.advance()
Implementation of BeerScanner.peek
- Defined in src/scanner.ts:108

print_tokens

print_tokens(): void
Returns void
Implementation of BeerScanner.print_tokens
- Defined in src/scanner.ts:327

reset_scanner

reset_scanner(): void
Returns void
Implementation of BeerScanner.reset_scanner
- Defined in src/scanner.ts:41

`Private` scan

scan(): void
Scan for tokens in the source code string

Returns void
Implementation of BeerScanner.scan
- Defined in src/scanner.ts:208

scan_tokens

scan_tokens(): void
Scan the source code string and return a list of tokens. updates the tokens property of the class

Returns void
Implementation of BeerScanner.scan_tokens
- Defined in src/scanner.ts:53

set_source

set_source(source): void
Parameters
- source: string
Returns void
Implementation of BeerScanner.set_source
- Defined in src/scanner.ts:37

`Private` string

string(): void
Look for string literals

Returns void
Implementation of BeerScanner.string
- Defined in src/scanner.ts:167

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