5.4.5.10 Input Statement

Note

This section describes the implementation of MS-VBAL §5.4.5.10 Input Statement.

Syntax

AST node	Instruction kind(s)	Notes
KeywordStatementNode	Simple	Token: Input.

See RD-VBAL §3.4.3 File Statements.

Runtime Semantics

Input # reads the text format Write # writes: a String is a quoted string, and the format includes the tokens #TRUE#, #NULL#, #ERROR n# and #yyyy-mm-dd hh:mm:ss#. See RD-VBAL §5.4.5.9 Write Statement for the format.

The number of characters Input # reads depends on the declared type of the variable it reads into, so Input # resolves the target before it reads the target's field. For its target, Input #:

1. Resolves the target variable, with the same target resolution the Let assignment statement uses (RD-VBAL §5.4.3.8 Let Statement).
2. Reads the target's field from the file, through the channel's character input surface.
3. Let-assigns what it read to the target, as MS-VBAL §5.4.5.10 specifies.

Implementation

Name	Role
IFileChannelInput	The character input surface of a channel, shared with Line Input # (RD-VBAL §5.4.5 File Statements).
LetAssignmentEvaluator.TryResolveTarget	Resolves the target: the same target resolution Line Input #, Get and the Let assignment statement use.

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⏮️ RD-VBAL §5.4.5.9 Write Statement | ⏭️ RD-VBAL §5.4.5.11 Put Statement