parser

package
v1.3.0 Latest Latest
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 Go to latest Published: Jul 15, 2025 License: BSD-3-Clause Imports: 12 Imported by: 0

Documentation

Overview

Package parser provides the logic for traversing the ANTLR generated parse tree. Provides a visitor and related functions.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func IdentityTransform 

func IdentityTransform(e expr.Expression) expr.Expression

IdentityTransform returns the given expression without any modification.

Types

type FHIRPathErrorListener 

type FHIRPathErrorListener struct {
	*antlr.DefaultErrorListener
	// contains filtered or unexported fields
}

func (*FHIRPathErrorListener) Error 

func (l *FHIRPathErrorListener) Error() error

func (*FHIRPathErrorListener) SyntaxError 

func (l *FHIRPathErrorListener) SyntaxError(recognizer antlr.Recognizer, offendingSymbol interface{}, line, column int, msg string, e antlr.RecognitionException)

type FHIRPathVisitor 

type FHIRPathVisitor struct {
	*grammar.BasefhirpathVisitor

	Functions  funcs.FunctionTable
	Transform  VisitorTransform
	Permissive bool
	// contains filtered or unexported fields
}

func (*FHIRPathVisitor) Visit 

func (v *FHIRPathVisitor) Visit(tree antlr.ParseTree) interface{}

func (*FHIRPathVisitor) VisitAdditiveExpression 

func (v *FHIRPathVisitor) VisitAdditiveExpression(ctx *grammar.AdditiveExpressionContext) interface{}

func (*FHIRPathVisitor) VisitAndExpression 

func (v *FHIRPathVisitor) VisitAndExpression(ctx *grammar.AndExpressionContext) interface{}

func (*FHIRPathVisitor) VisitBooleanLiteral 

func (v *FHIRPathVisitor) VisitBooleanLiteral(ctx *grammar.BooleanLiteralContext) interface{}

VisitBooleanLiteral returns a BooleanLiteralExpression, returning an error if there is an error during creation of the Boolean.

func (*FHIRPathVisitor) VisitDateLiteral 

func (v *FHIRPathVisitor) VisitDateLiteral(ctx *grammar.DateLiteralContext) interface{}

VisitDateLiteral returns a DateLiteralExpression, returning an error if there is an error during creation of the Date type.

func (*FHIRPathVisitor) VisitDateTimeLiteral 

func (v *FHIRPathVisitor) VisitDateTimeLiteral(ctx *grammar.DateTimeLiteralContext) interface{}

VisitDateTimeLiteral returns a DateTimeLiteralExpression, returning an error if there is an error during creation of the DateTime type.

func (*FHIRPathVisitor) VisitDateTimePrecision 

func (v *FHIRPathVisitor) VisitDateTimePrecision(ctx *grammar.DateTimePrecisionContext) interface{}

func (*FHIRPathVisitor) VisitEqualityExpression 

func (v *FHIRPathVisitor) VisitEqualityExpression(ctx *grammar.EqualityExpressionContext) interface{}

VisitEqualityExpression both equality subexpressions and constructs an Equality Expression from the results of each subexpression

func (*FHIRPathVisitor) VisitExternalConstant 

func (v *FHIRPathVisitor) VisitExternalConstant(ctx *grammar.ExternalConstantContext) interface{}

func (*FHIRPathVisitor) VisitExternalConstantTerm 

func (v *FHIRPathVisitor) VisitExternalConstantTerm(ctx *grammar.ExternalConstantTermContext) interface{}

func (*FHIRPathVisitor) VisitFunction 

func (v *FHIRPathVisitor) VisitFunction(ctx *grammar.FunctionContext) interface{}

func (*FHIRPathVisitor) VisitFunctionInvocation 

func (v *FHIRPathVisitor) VisitFunctionInvocation(ctx *grammar.FunctionInvocationContext) interface{}

func (*FHIRPathVisitor) VisitIdentifier 

func (v *FHIRPathVisitor) VisitIdentifier(ctx *grammar.IdentifierContext) interface{}

func (*FHIRPathVisitor) VisitImpliesExpression 

func (v *FHIRPathVisitor) VisitImpliesExpression(ctx *grammar.ImpliesExpressionContext) interface{}

func (*FHIRPathVisitor) VisitIndexInvocation 

func (v *FHIRPathVisitor) VisitIndexInvocation(ctx *grammar.IndexInvocationContext) interface{}

func (*FHIRPathVisitor) VisitIndexerExpression 

func (v *FHIRPathVisitor) VisitIndexerExpression(ctx *grammar.IndexerExpressionContext) interface{}

VisitIndexerExpression visits both the left side expression and right side expression, and constructs an index expression. If the right side expression does not evaluate to an Integer, returns an error

func (*FHIRPathVisitor) VisitInequalityExpression 

func (v *FHIRPathVisitor) VisitInequalityExpression(ctx *grammar.InequalityExpressionContext) interface{}

func (*FHIRPathVisitor) VisitInvocationExpression 

func (v *FHIRPathVisitor) VisitInvocationExpression(ctx *grammar.InvocationExpressionContext) interface{}

VisitInvocationExpression visits both sides, and constructs an expression sequence.

func (*FHIRPathVisitor) VisitInvocationTerm 

func (v *FHIRPathVisitor) VisitInvocationTerm(ctx *grammar.InvocationTermContext) interface{}

func (*FHIRPathVisitor) VisitLiteralTerm 

func (v *FHIRPathVisitor) VisitLiteralTerm(ctx *grammar.LiteralTermContext) interface{}

func (*FHIRPathVisitor) VisitMemberInvocation 

func (v *FHIRPathVisitor) VisitMemberInvocation(ctx *grammar.MemberInvocationContext) interface{}

VisitMemberInvocation checks to see if the identifier corresponds to a resource type and is the root of the expression. If so, it will return a TypeExpression. Otherwise, it returns a FieldExpression.

func (*FHIRPathVisitor) VisitMembershipExpression 

func (v *FHIRPathVisitor) VisitMembershipExpression(ctx *grammar.MembershipExpressionContext) interface{}

func (*FHIRPathVisitor) VisitMultiplicativeExpression 

func (v *FHIRPathVisitor) VisitMultiplicativeExpression(ctx *grammar.MultiplicativeExpressionContext) interface{}

func (*FHIRPathVisitor) VisitNullLiteral 

func (v *FHIRPathVisitor) VisitNullLiteral(ctx *grammar.NullLiteralContext) interface{}

VisitNullLiteral returns a NullLiteralExpression, without any error.

func (*FHIRPathVisitor) VisitNumberLiteral 

func (v *FHIRPathVisitor) VisitNumberLiteral(ctx *grammar.NumberLiteralContext) interface{}

VisitNumberLiteral returns either an integer or decimal, depending on whether or not the number contains a decimal. Returns an error if there is an error during creation of the number.

func (*FHIRPathVisitor) VisitOrExpression 

func (v *FHIRPathVisitor) VisitOrExpression(ctx *grammar.OrExpressionContext) interface{}

func (*FHIRPathVisitor) VisitParamList 

func (v *FHIRPathVisitor) VisitParamList(ctx *grammar.ParamListContext) interface{}

func (*FHIRPathVisitor) VisitParenthesizedTerm 

func (v *FHIRPathVisitor) VisitParenthesizedTerm(ctx *grammar.ParenthesizedTermContext) interface{}

func (*FHIRPathVisitor) VisitPluralDateTimePrecision 

func (v *FHIRPathVisitor) VisitPluralDateTimePrecision(ctx *grammar.PluralDateTimePrecisionContext) interface{}

func (*FHIRPathVisitor) VisitPolarityExpression 

func (v *FHIRPathVisitor) VisitPolarityExpression(ctx *grammar.PolarityExpressionContext) interface{}

func (*FHIRPathVisitor) VisitProg 

func (v *FHIRPathVisitor) VisitProg(ctx *grammar.ProgContext) interface{}

func (*FHIRPathVisitor) VisitQualifiedIdentifier 

func (v *FHIRPathVisitor) VisitQualifiedIdentifier(ctx *grammar.QualifiedIdentifierContext) interface{}

func (*FHIRPathVisitor) VisitQuantity 

func (v *FHIRPathVisitor) VisitQuantity(ctx *grammar.QuantityContext) interface{}

func (*FHIRPathVisitor) VisitQuantityLiteral 

func (v *FHIRPathVisitor) VisitQuantityLiteral(ctx *grammar.QuantityLiteralContext) interface{}

VisitQuantityLiteral returns a QuantityLiteralExpression, returning an error if there is an error during creation of the Quantity type.

func (*FHIRPathVisitor) VisitStringLiteral 

func (v *FHIRPathVisitor) VisitStringLiteral(ctx *grammar.StringLiteralContext) interface{}

VisitStringLiteral returns a StringLiteralExpression, returning an error if there is an error during creation of the String.

func (*FHIRPathVisitor) VisitTermExpression 

func (v *FHIRPathVisitor) VisitTermExpression(ctx *grammar.TermExpressionContext) interface{}

func (*FHIRPathVisitor) VisitThisInvocation 

func (v *FHIRPathVisitor) VisitThisInvocation(ctx *grammar.ThisInvocationContext) interface{}

func (*FHIRPathVisitor) VisitTimeLiteral 

func (v *FHIRPathVisitor) VisitTimeLiteral(ctx *grammar.TimeLiteralContext) interface{}

VisitTimeLiteral returns a TimeLiteralExpression, returning an error if there is an error during creation of the Time type.

func (*FHIRPathVisitor) VisitTotalInvocation 

func (v *FHIRPathVisitor) VisitTotalInvocation(ctx *grammar.TotalInvocationContext) interface{}

func (*FHIRPathVisitor) VisitTypeExpression 

func (v *FHIRPathVisitor) VisitTypeExpression(ctx *grammar.TypeExpressionContext) interface{}

func (*FHIRPathVisitor) VisitTypeSpecifier 

func (v *FHIRPathVisitor) VisitTypeSpecifier(ctx *grammar.TypeSpecifierContext) interface{}

func (*FHIRPathVisitor) VisitUnionExpression 

func (v *FHIRPathVisitor) VisitUnionExpression(ctx *grammar.UnionExpressionContext) interface{}

func (*FHIRPathVisitor) VisitUnit 

func (v *FHIRPathVisitor) VisitUnit(ctx *grammar.UnitContext) interface{}

type VisitResult 

type VisitResult struct {
	Result expr.Expression
	Error  error
}

type VisitorTransform 

type VisitorTransform func(expr.Expression) expr.Expression

A VisitorTransform is a function which transforms the specified expression. This is used in FHIRPath Patch to modify expressions.

Source Files

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