parser

package

v0.0.0-...-bf9f4d5 Latest Latest Go to latest Published: Dec 16, 2020 License: MIT Imports: 6 Imported by: 0

Documentation ¶

Overview ¶

Package parser contains the definition of the parser element of the glif interpreter.

If also declare the following:

Precedence constants
map of token/precedence
prefix and infix functions
parsing method for recognize tokens

Index ¶

Constants
type Parser
- func New(l *lexer.Lexer) *Parser
- func NewWithOptions(l *lexer.Lexer, showTrace bool) *Parser
- func (p *Parser) Errors() []string
- func (p *Parser) ParseProgram() *ast.Program

Constants ¶

View Source

const (
	LOWEST      int
	TO          // ->
	EQUALS      // ==
	LESSGREATER // < or >
	SUM         // +
	PRODUCT     // *
	PREFIX      // -X or !X
	CALL        // myFunction(X)
	INDEX       // array[index]
)

Contant used in the precedence parsing for operator

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type Parser ¶

type Parser struct {
	// contains filtered or unexported fields
}

Parser is the representation of the glif parser It contains the following:

A slice of errors (parsing error)
The current token AND the next (peek) token
Maps containing the prefix AND infix parse functions

func New ¶

func New(l *lexer.Lexer) *Parser

New creates a new parser from a lexer and register the prefix/infix parsing functions

func NewWithOptions ¶

func NewWithOptions(l *lexer.Lexer, showTrace bool) *Parser

NewWithOptions creates a new parser from a lexer and additionnal bool options The creation of the parser is done via the New function and not directly here, that way there is only one place where the parser is instantiated.

func (*Parser) Errors ¶

func (p *Parser) Errors() []string

Errors returns the errors found (if any) while parsing

func (*Parser) ParseProgram ¶

func (p *Parser) ParseProgram() *ast.Program

ParseProgram is the entry point of the parser. It returns the *ast.Program node which represents the entire script.

Source Files ¶

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