tp.client.pyscheme.expressions

Package tp :: Package client :: Package pyscheme :: Module expressions

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Module tp.client.pyscheme.expressions

Provides functions to extract portions of the expression tree and
to construct new expressions.  Heavily used in eval.py

Classes
`ExpressionTests`

Function Summary
	`assignmentValue(exp)`
	`assignmentVariable(exp)`
	`beginActions(exp)`
	`condActions(clause)`
	`condClauses(exp)`
	`condPredicate(clause)`
	`condToIf(exp)`
	`continuationImplementation(proc)`
	`definitionValue(exp)`
	`definitionVariable(exp)`
	`expandClauses(clauses)`
	`expandQuasiquotation(exp, depth)` Takes a quasiquoted expression and constructs a new quoted expression.
	`firstExp(seq)`
	`firstOperand(ops)`
	`ifAlternative(exp)`
	`ifConsequent(exp)`
	`ifPredicate(exp)`
	`isApplication(exp)`
	`isAssignment(exp)` Assignments have the form (set! <var> <value>).
	`isBegin(exp)`
	`isCompoundProcedure(p)`
	`isCond(exp)`
	`isCondElseClause(clause)`
	`isContinuationProcedure(proc)`
	`isDefinition(exp)`
	`isFalse(x)`
	`isIf(exp)`
	`isLambda(exp)`
	`isLastExp(seq)`
	`isLet(exp)`
	`isNoOperands(ops)`
	`isNumber(x)` Returns True if we see a number.
	`isPrimitiveProcedure(proc)`
	`isQuasiquoted(exp)`
	`isQuoted(exp)`
	`isSelfEvaluating(exp)` Returns True if the expression is self-evaluating.
	`isString(x)` Returns True if we see a string.
	`isTaggedList(exp, tag)` Returns true if the expression is tagged with the 'tag'.
	`isTrue(x)`
	`isUnquoted(exp)`
	`isVariable(exp)` Returns true if the expression looks like a symbol.
	`lambdaBody(exp)`
	`lambdaParameters(exp)`
	`letBindings(exp)`
	`letBindingValues(bindings)`
	`letBindingVariables(bindings)`
	`letBody(exp)`
	`letToApplication(exp)`
	`makeApplication(operators, operands)`
	`makeAssignment(var, val)`
	`makeBegin(seq)`
	`makeContinuationProcedure(proc)` Procedure is defined to be a function that takes a single 'val' argument.
	`makeDefinition(var, val)`
	`makeIf(predicate, consequent, alternative)`
	`makeLambda(parameters, body)`
	`makePrimitiveProcedure(proc)`
	`makeProcedure(parameters, body, env)`
	`makeQuoted(exp)`
	`operands(exp)`
	`operator(exp)`
	`primitiveImplementation(proc)`
	`procedureBody(p)`
	`procedureEnvironment(p)`
	`procedureParameters(p)`
	`restExps(seq)`
	`restOperands(ops)`
	`sequenceToExp(seq)`
	`textOfQuotation(exp)`
	`textOfUnquotation(exp)`
	`toString(expr, quoteStrings)` Given a Scheme expression, returns a string that tries to nicely return it as a string.

Variable Summary
`str`	`__license__` = `'MIT License'`

Function Details

expandQuasiquotation(exp, depth=1)

Takes a quasiquoted expression and constructs a new quoted
expression.

FIXME: this function is SO evil.  *grin*  Must clean this up.

isAssignment(exp)

Assignments have the form (set! <var> <value>).

isNumber(x)

Returns True if we see a number.

isSelfEvaluating(exp)

Returns True if the expression is self-evaluating.

isString(x)

Returns True if we see a string.

isTaggedList(exp, tag)

Returns true if the expression is tagged with the 'tag'.

isVariable(exp)

Returns true if the expression looks like a symbol.

makeContinuationProcedure(proc)

Procedure is defined to be a function that takes a single 'val'
argument.

toString(expr, quoteStrings=1)

Given a Scheme expression, returns a string that tries to nicely
return it as a string.

If quoteStrings is true, puts quotes around string expressions.

Notes: this is a little tricky just because we have to account for
loopy structures.  We keep a set of expressions that we've already
seen, to make sure we don't retrace any steps.

Variable Details

license

Type:: str
Value:: 'MIT License'

Generated by Epydoc 2.1 on Fri Jan 1 08:00:26 2010

http://epydoc.sf.net

Module tp.client.pyscheme.expressions

expandQuasiquotation(exp, depth=1)

isAssignment(exp)

isNumber(x)

isSelfEvaluating(exp)

isString(x)

isTaggedList(exp, tag)

isVariable(exp)

makeContinuationProcedure(proc)

toString(expr, quoteStrings=1)

__license__

license