SRFI 45: Primitives for Expressing Iterative Lazy Algorithms

	SRFI 1: List Library
	SRFI 2: AND-LET*: an AND with local bindings...
	SRFI 4: Homogeneous numeric vector datatypes
	SRFI 6: Basic String Ports
	SRFI 7: Feature-based program configuration language
	SRFI 8: RECEIVE: Binding to multiple values
	SRFI 9: Defining Record Types
	SRFI 11: Syntax for receiving multiple values
	SRFI 13: String Libraries
	SRFI 14: Character-set Library
	SRFI 16: Syntax for procedures of variable arity
	SRFI 17: Generalized set!
	SRFI 19: Time Data Types and Procedures
	SRFI 23: Error reporting mechanism
	SRFI 25: Multi-dimensional Array Primitives
	SRFI 26: Notation for Specializing Parameters without Currying
	SRFI 27: Sources of Random Bits
	SRFI 28: Basic Format Strings
	SRFI 30: Nested Multi-line Comments
	SRFI 31: A special form rec for recursive evaluation
	SRFI 34: Exception Handling for Programs
	SRFI 35: Conditions
	SRFI 38: External Representation for Data With Shared Structure
	SRFI 39: Parameter objects
	SRFI 40: A Library of Streams
	SRFI 41: Streams
	SRFI 42: Eager Comprehensions
	SRFI 43: Vector Library
	SRFI 45: Primitives for Expressing Iterative Lazy Algorithms
	SRFI 48: Intermediate Format Strings
	SRFI 54: Formatting
	SRFI 57: Records
	SRFI 59: Vicinity
	SRFI 60: Integers as Bits
	SRFI 61: A more general cond clause
	SRFI 62: S-expression comments
	SRFI 63: Homogeneous and Heterogeneous Arrays
	SRFI 64: A Scheme API for test suites
	SRFI 66: Octet Vectors
	SRFI 67: Compare Procedures
	SRFI 69: Basic hash tables
	SRFI 71: Extended LET-syntax for multiple values
	SRFI 74: Octet-Addressed Binary Blocks
	SRFI 78: Lightweight testing
	SRFI 86: MU & NU simulating VALUES & CALL-WITH-VALUES...
	SRFI 87: => in case clauses
	SRFI 98: An interface to access environment variables
	Index

在本页中：

promise?

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SRFI 45: Primitives for Expressing Iterative Lazy Algorithms

(require srfi/45)

package： srfi-lib

Original specification: SRFI 45

Additional binding:

函数
(promise? v) → boolean?
v : any/c

Returns #t if v is a promise, #f otherwise.

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