software.amazon.smithy.model.loader

Class ParserUtils

java.lang.Object

software.amazon.smithy.model.loader.ParserUtils

public final class ParserUtils
extends java.lang.Object

Utility methods that act on a SimpleParser and parse Smithy grammar productions.

Method Summary

Modifier and Type	Method and Description
static void	consumeIdentifier(SimpleParser parser) Expects and skips over a Smithy identifier production.
static void	consumeNamespace(SimpleParser parser) Expects and consumes a valid Smithy shape ID namespace.
static boolean	isAlphabetic(char c) Returns true if the given character is an alphabetic character A-Z, a-z.
static boolean	isDigit(char c) Returns true if the given value is a digit 0-9.
static boolean	isIdentifierStart(char c) Returns true if the given character is allowed to start an identifier.
static boolean	isValidIdentifierCharacter(char c) Returns true if the given character is allowed in an identifier.
static java.lang.String	parseIdentifier(SimpleParser parser) Expects and returns a parsed Smithy identifier production.
static java.lang.String	parseNumber(SimpleParser parser) Parses a Smithy number production into a string.
static java.lang.String	parseRootShapeId(SimpleParser parser) Expects and returns a parsed absolute Smithy Shape ID that does not include a member.
static java.lang.String	parseShapeId(SimpleParser parser) Expects and returns a parsed absolute Smithy Shape ID.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

parseNumber

public static java.lang.String parseNumber(SimpleParser parser)

Parses a Smithy number production into a string.

-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?

Parameters:

parser - Parser to consume tokens from.

Returns:

Returns the parsed number lexeme.

parseIdentifier

public static java.lang.String parseIdentifier(SimpleParser parser)

Expects and returns a parsed Smithy identifier production.

Parameters:

parser - Parser to consume tokens from.

Returns:

Returns the parsed identifier.

parseRootShapeId

public static java.lang.String parseRootShapeId(SimpleParser parser)

Expects and returns a parsed absolute Smithy Shape ID that does not include a member.

Parameters:

parser - Parser to consume tokens from.

Returns:

Returns the parsed Shape ID as a string.

parseShapeId

public static java.lang.String parseShapeId(SimpleParser parser)

Expects and returns a parsed absolute Smithy Shape ID.

Parameters:

parser - Parser to consume tokens from.

Returns:

Returns the parsed Shape ID as a string.

consumeNamespace

public static void consumeNamespace(SimpleParser parser)

Expects and consumes a valid Smithy shape ID namespace.

Parameters:

parser - Parser to consume tokens from.

consumeIdentifier

public static void consumeIdentifier(SimpleParser parser)

Expects and skips over a Smithy identifier production.

     identifier       = identifier_start *identifier_chars
     identifier_start = *"_" ALPHA
     identifier_chars = ALPHA / DIGIT / "_"
 

Parameters:

parser - Parser to consume tokens from.

isValidIdentifierCharacter

public static boolean isValidIdentifierCharacter(char c)

Returns true if the given character is allowed in an identifier.

Parameters:

c - Character to check.

Returns:

Returns true if the character is allowed in an identifier.

isIdentifierStart

public static boolean isIdentifierStart(char c)

Returns true if the given character is allowed to start an identifier.

Parameters:

c - Character to check.

Returns:

Returns true if the character can start an identifier.

isDigit

public static boolean isDigit(char c)

Returns true if the given value is a digit 0-9.

Parameters:

c - Character to check.

Returns:

Returns true if the character is a digit.

isAlphabetic

public static boolean isAlphabetic(char c)

Returns true if the given character is an alphabetic character A-Z, a-z. This is a stricter version of Character.isAlphabetic(int).

Parameters:

c - Character to check.

Returns:

Returns true if the character is an alphabetic character.