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Support Function Calls

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Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
This commit is contained in:
Will Hawkins
2026-04-09 23:16:27 -04:00
parent 708f65a0a9
commit d39127ac17
21 changed files with 984 additions and 311 deletions
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Sources/P4Runtime/Parser.swift
+18 -8
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@@ -19,20 +19,20 @@ import Common
import P4Lang
extension ParserAssignmentStatement: EvaluatableStatement {
public func evaluate(execution: ProgramExecution) -> ProgramExecution {
public func evaluate(execution: ProgramExecution) -> (ControlFlow, ProgramExecution) {
let result = self.value.evaluate(execution: execution)
guard case Result.Ok(let value) = result else {
return execution.setError(error: result.error()!)
return (ControlFlow.Error, execution.setError(error: result.error()!))
}
let maybe_updated_scopes = self.lvalue.set(
to: value, inScopes: execution.scopes, duringExecution: execution)
guard case Result.Ok(let updated_scopes) = maybe_updated_scopes else {
return execution.setError(error: maybe_updated_scopes.error()!)
return (ControlFlow.Error, execution.setError(error: maybe_updated_scopes.error()!))
}
execution.scopes = updated_scopes.0
return execution
return (ControlFlow.Next, execution)
}
}
@@ -43,7 +43,12 @@ extension ParserStateDirectTransition: EvaluatableParserState {
var program = program.enter_scope()
for statement in statements {
program = statement.evaluate(execution: program)
let (control_flow, next_program) = statement.evaluate(execution: program)
switch control_flow {
case .Next: program = next_program // Ok!
case .Error: return (reject, next_program)
default: return (reject, next_program.setError(error: Error(withMessage: "Invalid control flow (\(control_flow) in parser)")))
}
}
let res = program.scopes.lookup(identifier: get_next_state())
@@ -93,7 +98,12 @@ extension ParserStateSelectTransition: EvaluatableParserState {
// First, evaluate the statements.
for statement in statements {
program = statement.evaluate(execution: program)
let (control_flow, next_program) = statement.evaluate(execution: program)
switch control_flow {
case .Next: program = next_program // Ok!
case .Error: return (reject, next_program)
default: return (reject, next_program.setError(error: Error(withMessage: "Invalid control flow (\(control_flow) in parser)")))
}
}
let res = self.selectExpression.evaluate(execution: program)
@@ -159,8 +169,8 @@ extension Parser: CallableExecution {
}
for (parameter, argument) in zip(self.parameters.parameters, arguments.arguments) {
let arg_idx = argument.0
let arg_value = argument.1
let arg_idx = argument.index
let arg_value = argument.argument
let maybe_argument_value = arg_value.evaluate(execution: execution)
guard case .Ok(let argument_value) = maybe_argument_value else {
return (